WO2015070635A1 - 传输方法及装置 - Google Patents

传输方法及装置 Download PDF

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Publication number
WO2015070635A1
WO2015070635A1 PCT/CN2014/082694 CN2014082694W WO2015070635A1 WO 2015070635 A1 WO2015070635 A1 WO 2015070635A1 CN 2014082694 W CN2014082694 W CN 2014082694W WO 2015070635 A1 WO2015070635 A1 WO 2015070635A1
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WO
WIPO (PCT)
Prior art keywords
signal
downlink
uplink
demodulation reference
reference signal
Prior art date
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Ceased
Application number
PCT/CN2014/082694
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English (en)
French (fr)
Inventor
温容慧
周明宇
李超君
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP14862632.8A priority Critical patent/EP3059917B1/en
Priority to RU2016123048A priority patent/RU2644559C2/ru
Publication of WO2015070635A1 publication Critical patent/WO2015070635A1/zh
Priority to US15/152,340 priority patent/US10153851B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B15/00Suppression or limitation of noise or interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L25/03159Arrangements for removing intersymbol interference operating in the frequency domain
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/0073Allocation arrangements that take into account other cell interferences
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1423Two-way operation using the same type of signal, i.e. duplex for simultaneous baseband signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1461Suppression of signals in the return path, i.e. bidirectional control circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2649Demodulators
    • H04L27/26524Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • H04L27/26526Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to a transmission method and apparatus.
  • the existing LTE (Long Term Evolution) system supports Time Division Duplex (TDD) and Frequency Division Duplex (FDD), SC-FDMA for uplink, and OFDMA for downlink. Therefore, the carrier mapping modes of the uplink and downlink in the existing LTE system are different, and only one carrier mapping manner is used for communication on the same time-frequency resource.
  • existing LTE technologies can introduce new communication technologies, such as wireless backhaul, full-duplex transceivers, and dynamic TDD systems. The above new communication technology requires that the uplink signal and the downlink signal coexist on the same time-frequency resource.
  • the inventors have found that after the introduction of the new communication technology, there will be simultaneous uplink and downlink carrier mapping modes on the same time-frequency resource, that is, different carrier mapping modes will exist on the same time-frequency resource. Therefore, it is disadvantageous for the communication signal receiver to perform interference cancellation (IC).
  • IC interference cancellation
  • an object of embodiments of the present invention is to provide a transmission method and apparatus to solve the above problems.
  • the embodiment of the present invention provides the following technical solution:
  • a transmission method including: The receiving party receives the communication signal, where the communication signal includes an uplink signal and a downlink signal that are transmitted on the same time-frequency resource; the uplink signal and the downlink signal are in the same carrier mapping manner, and the uplink number corresponds to the first multiple access mode. And the downlink signal corresponds to the second multiple access mode; the receiver performs interference cancellation on the communication signal according to the first multiple access mode and the second multiple access mode.
  • the same carrier mapping manner is a downlink carrier mapping manner
  • the receiving the communication signal includes: receiving a communication signal at a frequency point corresponding to the downlink carrier mapping manner
  • the same carrier mapping mode is an uplink carrier mapping mode
  • the receiving the communication signal includes: receiving a communication signal at a frequency point corresponding to the uplink carrier mapping mode.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal;
  • the downlink signal includes a downlink demodulation reference signal and a downlink data signal;
  • the downlink signal is used, and the resource unit RE mapping mode of the downlink demodulation reference signal; in the received communication signal, the RE position of the uplink demodulation reference signal is the same as the RE position of the downlink demodulation reference signal; or
  • the uplink signal and the downlink signal are used, and the RE demodulation reference signal is in the RE mapping mode.
  • the RE position of the downlink demodulation reference signal is the same as the RE position of the uplink demodulation reference signal.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal;
  • the downlink signal includes a downlink demodulation reference signal and a downlink data signal;
  • the RE position of the uplink demodulation reference signal is different from the RE position of the downlink demodulation reference signal;
  • the uplink signal is processed by downlink silence/low power, and the downlink signal is uplinked. Silent / low power processing.
  • the interference deletion includes: performing a discrete Fourier transform on the communication signal, to obtain Mixing the received signal in the frequency domain; separating the uplink demodulation reference signal, the downlink demodulation reference signal, and the first data signal from the frequency domain mixed received signal, where the first data signal includes an uplink data signal and a downlink data signal number;
  • the interference signal is an uplink data signal
  • the first multiple address is a single carrier frequency division multiple access (SC-FDMA)
  • the second multiple access is an orthogonal frequency division multiple access OFDMA;
  • the demodulating the first data signal according to the modulation mode of the uplink signal, and obtaining the interference signal estimated value comprises: performing channel estimation according to the uplink demodulation reference signal, a first channel estimation value; performing channel equalization according to the uplink demodulation reference signal and the first data signal, to obtain a first equalization result;
  • An uplink modulated signal estimated value; multiplying the uplink modulated signal estimated value by the first channel estimated value to obtain the interference signal estimated value; and performing demodulating the second data signal comprises: according to a downlink demodulation reference Performing channel estimation on the signal to obtain a second channel estimation value; performing channel equalization according to the downlink demodulation reference signal and the second data signal, to obtain a second equalization result;
  • the interference signal is a downlink data signal
  • the first multiple address is a single carrier frequency division multiple access (SC-FDMA)
  • SC-FDMA single carrier frequency division multiple access
  • Demodulating the second data signal includes: performing channel estimation according to the uplink demodulation reference signal to obtain a first channel estimation value; performing channel equalization according to the uplink demodulation reference signal and the second data signal, to obtain a first equalization Result
  • Channel decoding is performed on the estimated value of the uplink modulated signal to obtain data bits.
  • a transmission method including: an uplink signal sender sends an uplink signal, and the uplink signal and a downlink signal transmitted on the same time-frequency resource use the same carrier mapping manner.
  • the uplink number corresponds to the first multiple access mode
  • the downlink signal corresponds to the second multiple access mode.
  • the method further includes: performing, by the uplink signal sender, continuous/non- Continuous spectrum shifting, so that the frequency of the uplink signal is moved to a frequency point corresponding to the downlink carrier mapping mode.
  • the continuous/non-continuous spectrum shifting includes: moving a continuous spectrum of the uplink signal from the center point to the two sides by half The carrier width is obtained as a discontinuous spectrum; the center of the discontinuous spectrum is vacated by one subcarrier width.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal; and the downlink signal includes a downlink demodulation reference signal and a downlink data signal;
  • the method further includes: performing, by the uplink signal sender, uplink RE mapping and downlink RE mapping.
  • the RE position of the uplink demodulation reference signal is the same as the RE position of the downlink demodulation reference signal.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal
  • the downlink signal includes a downlink demodulation reference signal and a downlink data signal
  • the method further includes: performing, by the uplink signal sender, downlink silence/low power processing.
  • the performing the uplink RE mapping to the downlink RE mapping process includes: transmitting an uplink solution on the RE transmitting the downlink demodulation reference signal And adjusting the reference signal, and the orthogonal sequence of the uplink demodulation reference signal is orthogonal to the orthogonal sequence code of the downlink demodulation reference signal.
  • a transmission method including: sending, by a sender of a downlink signal, a downlink signal, where the downlink signal is uploaded with the same time-frequency resource The uplink signal is transmitted in the same carrier mapping manner, the uplink number corresponds to the first multiple access mode, and the downlink signal corresponds to the second multiple access mode.
  • the method further includes: the sender of the downlink signal is discontinuous /Continuous spectrum shifting, so that the frequency of the downlink signal is moved to a frequency point corresponding to the uplink carrier mapping mode.
  • the discontinuous/continuous spectrum shifting includes: moving the discontinuous spectrum of the downlink signal from the two sides to the central point by half The carrier width is obtained to obtain a continuous spectrum; the center of the discontinuous spectrum is vacated by one subcarrier width.
  • the uplink signal includes an uplink demodulation reference signal and An uplink data signal;
  • the downlink signal includes a downlink demodulation reference signal and a downlink data signal; when the uplink signal and the downlink signal are used, and the resource unit RE of the uplink demodulation reference signal is mapped, before the downlink signal is sent
  • the method further includes: performing, by the sender of the downlink signal, downlink RE mapping to uplink RE mapping processing, so that the RE position of the downlink demodulation reference signal and the RE of the uplink demodulation reference signal are included in the communication signal received by the signal receiver The location is the same.
  • the uplink signal includes an uplink demodulation reference signal and An uplink data signal;
  • the downlink signal includes a downlink demodulation reference signal and a downlink data signal; when an RE position of the uplink demodulation reference signal is different from an RE position of the downlink demodulation reference signal, before transmitting the downlink signal,
  • the method further includes: performing, by the sender of the downlink signal, uplink silence/low power processing.
  • the downlink RE mapping to uplink RE mapping processing includes: transmitting a downlink solution on an RE that transmits the uplink demodulation reference signal And adjusting the reference signal, and the orthogonal sequence of the downlink demodulation reference signal is orthogonal to the orthogonal sequence code of the uplink demodulation reference signal.
  • a transmission apparatus including: a receiving unit, configured to receive a communication signal, where the communication signal includes an uplink signal and a downlink signal transmitted on the same time-frequency resource; And the downlink signal is in the same carrier mapping manner; the uplink number corresponds to the first multiple access mode, the downlink signal corresponds to the second multiple access mode, and the interference deleting unit is configured to use the first multiple access mode and the The second multiple access mode performs interference cancellation on the communication signal.
  • the receiving unit when the same carrier mapping mode is a downlink carrier mapping mode, the receiving unit is specifically configured to: in the downlink carrier mapping, in receiving the communication signal Receiving the communication signal at the frequency corresponding to the mode; or, when the same carrier mapping mode is the uplink carrier mapping mode, the receiving unit is specifically configured to: correspond to the uplink carrier mapping mode The communication signal is received at the frequency point.
  • the interference deleting unit is specifically configured to: perform a discrete Fourier transform on the communication signal to obtain a frequency domain mixed received signal; An uplink demodulation reference signal, a downlink demodulation reference signal, and a first data signal are separated from the frequency domain mixed received signal, where the first data signal includes an uplink data signal and a downlink data signal;
  • the first multiple address is single carrier frequency division multiple access (SC-FDMA), and the second multiple address is orthogonal frequency division Multiple access OFDMA; when the interference signal is an uplink data signal, the first data signal is demodulated according to a modulation mode of the uplink signal to obtain an interference signal estimation value, and the interference deletion unit is specifically used
  • SC-FDMA single carrier frequency division multiple access
  • OFDMA orthogonal frequency division Multiple access
  • the interference deleting unit is specifically configured to: perform channel estimation according to the downlink demodulation reference signal, to obtain a second channel estimation value; and perform channel according to the downlink demodulation reference signal and the second data signal. Equilibrium, obtaining a second equilibrium result;
  • the interference signal is a downlink data signal
  • the first data signal is demodulated according to a modulation mode of the downlink signal to obtain an interference signal estimation value
  • the interference deleting unit is specifically configured to: according to the downlink demodulation reference signal Performing channel estimation to obtain a second channel estimation value; performing channel equalization according to the downlink demodulation reference signal and the first data signal, to obtain a second equalization result;
  • the interference deleting unit is specifically configured to: perform channel estimation according to the uplink demodulation reference signal to obtain a first channel estimation value; and perform channel according to the uplink demodulation reference signal and the second data signal. Equilibrium, obtaining the first equilibrium result;
  • a transmission apparatus including: an uplink sending unit, configured to send an uplink signal, where the uplink signal and a downlink signal transmitted on the same time-frequency resource use the same carrier mapping manner, where The uplink number corresponds to the first multiple access mode, and the downlink signal corresponds to the second multiple access mode.
  • the apparatus when the same carrier mapping mode is a downlink carrier mapping mode, the apparatus further includes: a continuous/non-contiguous spectrum shifting unit, configured to be used in the uplink Before the transmitting unit sends the uplink signal, the continuous/discontinuous frequency shift is performed to move the frequency of the uplink signal to the frequency point corresponding to the downlink carrier mapping mode.
  • a continuous/non-contiguous spectrum shifting unit configured to be used in the uplink Before the transmitting unit sends the uplink signal, the continuous/discontinuous frequency shift is performed to move the frequency of the uplink signal to the frequency point corresponding to the downlink carrier mapping mode.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal; and the downlink signal includes a downlink demodulation reference a signal and a downlink data signal; when the uplink signal and the downlink signal are used, and the resource unit RE mapping mode of the downlink demodulation reference signal, the apparatus further includes an uplink RE mapping and a downlink RE mapping unit, where Before the uplink transmitting unit sends the uplink signal, the uplink RE mapping to the downlink RE mapping process is performed, so that the RE position of the uplink demodulation reference signal and the RE position of the downlink demodulation reference signal are the same in the communication signal received by the signal receiver.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal; and the downlink signal includes a downlink demodulation reference a signal and a downlink data signal; when the RE position of the uplink demodulation reference signal is different from the RE position of the downlink demodulation reference signal, the apparatus further includes a downlink silence/low power unit for the transmitting unit Perform downlink silence/low power processing before transmitting the uplink signal.
  • a transmission apparatus including: a downlink sending unit, configured to send a downlink signal, where the downlink signal uses the same carrier mapping manner as an uplink signal transmitted on the same time-frequency resource
  • the uplink number corresponds to the first multiple access mode
  • the downlink signal corresponds to the second multiple access mode.
  • the apparatus in a first possible implementation manner, when the same carrier mapping mode is an uplink carrier mapping mode, the apparatus further includes a discontinuous/continuous frequency shifting unit, configured to be used in the downlink Before transmitting the downlink signal, the transmitting unit performs discontinuous/continuous spectrum shifting, so that the frequency of the downlink signal is moved to a frequency point corresponding to the uplink carrier mapping mode.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal; and the downlink signal includes a downlink demodulation reference And a downlink data signal RE; Before the downlink transmitting unit sends the downlink signal, performing downlink RE mapping to uplink RE mapping processing, so that the RE position of the downlink demodulation reference signal and the RE position of the uplink demodulation reference signal are the same in the communication signal received by the signal receiver.
  • the uplink signal includes an uplink demodulation reference signal and an uplink data signal; and the downlink signal includes a downlink demodulation reference a signal and a downlink data signal; when the RE position of the uplink demodulation reference signal is different from the RE position of the downlink demodulation reference signal, the apparatus further includes an uplink silence/low power unit, configured to send on the downlink The uplink silence/low power processing is performed before the unit sends the downlink signal.
  • the uplink and downlink signals transmitted on the same time-frequency resource are the same.
  • the carrier mapping mode can overcome the problem that the uplink and downlink signal carrier mapping modes of the same time-frequency resource are different after the introduction of the new technology, which is beneficial to the communication signal receiver to perform interference deletion.
  • FIG. 2 is a flowchart of a transmission method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of interaction between an uplink signal and a downlink signal according to an embodiment of the present invention
  • FIG. Another scenario in which the uplink signal and the downlink signal coexist in the embodiment is provided.
  • FIG. 6 is still another scenario in which the uplink signal and the downlink signal coexist in the embodiment of the present invention
  • FIG. 7 is a scenario in which the uplink signal and the downlink signal coexist according to the embodiment of the present invention
  • FIG. 8 is a schematic diagram of shifting an uplink carrier mapping frequency into a downlink carrier mapping spectrum according to an embodiment of the present invention;
  • FIG. 9 is a schematic diagram of the downlink carrier mapping frequency spectrum after moving to a downlink carrier mapping frequency according to an embodiment of the present invention
  • FIG. 10 is a schematic diagram of moving a downlink carrier mapping frequency into an uplink carrier mapping frequency spectrum according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a RE mapping position of a downlink demodulation RS signal according to an embodiment of the present invention
  • FIG. 13 is a schematic diagram of an uplink solution provided by an embodiment of the present invention
  • FIG. 14 is a schematic diagram of another RE mapping position of a downlink demodulation RS signal according to an embodiment of the present invention
  • FIG. 15 is a flowchart of interference deletion according to an embodiment of the present invention
  • FIG. 16 is another flowchart of interference deletion according to an embodiment of the present invention
  • FIG. 17 is still another flowchart of interference deletion according to an embodiment of the present invention
  • FIG. 19 is a schematic diagram of another structure of a transmission apparatus according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a RE mapping position of a downlink demodulation RS signal according to an embodiment of the present invention
  • FIG. 13 is a schematic diagram of an uplink solution provided by an embodiment of the present invention
  • FIG. 14 is a schematic diagram of another RE mapping position
  • FIG. 20 is a schematic diagram of another structure of a transmission apparatus according to an embodiment of the present invention.
  • FIG. 22 is a schematic structural diagram of a transmission apparatus according to an embodiment of the present invention.
  • FIG. 23 is a schematic structural diagram of an uplink signal generation unit according to an embodiment of the present invention.
  • FIG. 25 is a schematic structural diagram of an IC unit according to an embodiment of the present invention;
  • FIG. 26 is still another schematic structural diagram of a transmission apparatus according to an embodiment of the present invention.
  • the LTE system transmits only uplink signals or downlink signals on the same time-frequency resource. See Figure 1 (the abscissa is the frequency domain coordinates, and the ordinate is the frequency domain amplitude).
  • SC-FDMA Single Carrier- Frequency Division Multiplexing Access
  • the sub-carriers are continuous in the spectrum
  • the downlink is OFDM (Orthogonal Frequency Division Multiplexing Access), which is vacated in the frequency transmission center.
  • One subcarrier is not used, and the vacant subcarrier is a DC carrier (DC carrier) component.
  • the inventors have found that new communication technologies introduced to improve resource utilization and reduce costs have many requirements for coexistence of uplink signals and downlink signals on the same time-frequency resources, for example, wireless backhaul, full double New communication technologies such as transceivers and dynamic TDD systems.
  • the uplink and downlink carrier mapping modes are not aligned and differ by half a subcarrier. Therefore, after coexisting the uplink and downlink signals on the same time-frequency resource, the misaligned carrier mapping manner is not conducive to Subsequent interference cancellation (IC) needs to be optimized.
  • IC Subsequent interference cancellation
  • an embodiment of the present invention provides a transmission method and apparatus.
  • the execution body of the foregoing transmission method may be an uplink signal sender, a downlink signal sender, or a signal receiver. That is, the transmission device may be an uplink signal sender, a downlink signal sender, or a signal receiver.
  • the execution entity is an uplink signal sender
  • the corresponding transmission method may include at least the following steps: sending an uplink signal, where the uplink signal and the downlink signal transmitted on the same time-frequency resource use the same carrier mapping manner.
  • the foregoing transmission method may include: transmitting a downlink signal, where the downlink signal uses the same carrier mapping manner as the uplink signal transmitted on the same time-frequency resource.
  • the foregoing transmission method may at least include:
  • the received communication signal includes an uplink signal and a downlink signal transmitted on the same time-frequency resource, and the uplink signal and the downlink signal are in the same carrier mapping manner.
  • the uplink signal corresponds to the first multiple access mode
  • the downlink signal corresponds to the second multiple access mode
  • the uplink signal and the downlink signal received on the same time-frequency resource use the same carrier mapping manner, thereby facilitating interference cancellation by the signal receiver.
  • This article will describe in detail how to perform interference removal.
  • the uplink signal and the downlink signal transmitted on the same time-frequency resource in all the foregoing embodiments may use the same demodulation reference signal mapping manner, or may use different demodulation reference signals. The mapping method will be described in detail later in this article.
  • the LPN Low Power Node
  • the LPN receives the uplink signal sent by the UE and the downlink signal sent by the base station (eNB) on the same time-frequency resource.
  • the LPN sends a downlink signal to the UE on the same time-frequency resource, and sends an uplink signal to the base station (eNB).
  • eNB base station
  • the base station receives the UE1/LPN1 downlink signal on the same time-frequency resource, and sends the downlink signal to UE2/LPN2.
  • the fourth scenario as shown in Figure 7, in the dynamic TDD system, because the service requirements of different cells may be different, resulting in different uplink and downlink subframe ratios of adjacent cells, there are adjacent time-frequency resources, adjacent In the cell, UE1/LPN1 transmits an uplink signal to the first base station (eNB1), and the second base station (eNB2) transmits a downlink signal to UE2/LPN2.
  • eNB1 first base station
  • eNB2 the second base station
  • the transmission method to be protected by the present invention will be described in detail below in different scenarios.
  • the first scenario is introduced first. In the first scenario, still refer to FIG.
  • the LPN is used as a signal receiver (the role of the LPN may be a relay or a base station), the UE acts as an uplink signal sender, and the eNB acts as a downlink signal sender.
  • the first multiple access mode is SC-FDMA
  • the second multiple access mode is OFDMA.
  • the uplink and downlink signals transmitted on the same time-frequency resource can be used in the same carrier mapping manner. For example, the uplink and downlink signals transmitted on the same time-frequency resource are all used in the downlink carrier.
  • the mapping mode, or both, uses the uplink carrier mapping method.
  • the LPN determines which uplink and downlink signals are transmitted on the same time-frequency resource. Carrier mapping mode.
  • the uplink and downlink signals transmitted on the same time-frequency resource are in the downlink carrier mapping mode, since the UE sends the uplink signal by using the above-mentioned line carrier mapping manner, the LPN needs to notify the UE to perform continuous/discontinuous before receiving the communication signal. Frequency moves.
  • the transmission method corresponding to the signal receiver (LPN) may further include: notifying the UE (the uplink signal sender) of performing continuous/discontinuous spectrum shifting on the uplink signal.
  • the UE before transmitting the uplink signal, the UE needs to perform continuous/discontinuous spectrum shifting (according to the notification of the signal receiver) to move the frequency of the uplink signal to the frequency corresponding to the downlink carrier mapping mode.
  • the purpose of the above-mentioned continuous/non-continuous frequency shifting is to move the uplink carrier mapping spectrum into a downlink carrier mapping spectrum. Referring to FIG. 8, more specifically, it may include: Continuity of the uplink signal (on the time-frequency resource) The spectrum, moving half the subcarrier width from the center point to the sides, results in a discontinuous spectrum (see Figure 9).
  • both the UE (uplink signal sender) and the eNB (downlink signal sender) transmit the uplink and downlink signals by using the downlink carrier mapping manner shown in FIG. 9, that is, on the same time-frequency resource.
  • the same carrier mapping method is used for the uplink and downlink signals transmitted.
  • the "receiving communication signal" performed by the LPN may specifically include: receiving the communication signal at a frequency point corresponding to the downlink carrier mapping mode.
  • the eNB sends the downlink signal by default in the following carrier mapping manner. Therefore, before receiving the communication signal, the LPN needs to notify the eNB to perform the discontinuous signal. / Continuous spectrum shifting.
  • the signal receiving party (LPN) corresponding transmission method may further include: notifying the eNB (downlink signal sender) to perform discontinuous/continuous frequency shifting on the downlink signal.
  • the eNB before transmitting the downlink signal, the eNB needs to perform discontinuous/continuous frequency shifting on the downlink signal (in accordance with the notification of the signal receiver), so that the frequency of the downlink signal is moved to the frequency corresponding to the uplink carrier mapping mode. on.
  • the method may include: moving a discontinuous spectrum of the downlink signal from the two sides to the center point by half a subcarrier width to obtain a continuous spectrum (see FIG. 11).
  • both the UE (uplink signal sender) and the eNB (downlink signal sender) transmit uplink and downlink signals by using the uplink carrier mapping manner shown in FIG. 11, and thus can also be implemented at the same time frequency.
  • the uplink and downlink signals transmitted on the resource use the same carrier mapping method.
  • the "reception" performed by the LPN may specifically include: receiving at a frequency corresponding to the uplink carrier mapping mode.
  • the uplink signal may include an uplink demodulation reference (RS) signal and an uplink data signal;
  • the downlink signal may include a downlink demodulation reference (RS) signal and a downlink data signal.
  • RS uplink demodulation reference
  • RS downlink demodulation reference
  • Figure 12 shows the RE mapping position of the downlink demodulated RS signal on one RB.
  • the abscissa is a time slot
  • the vertical sub-carrier is a sub-carrier.
  • the PDSCH Physical Downlink Shared Channel
  • the data of the DSCH (downlink shared channel), that is, the downlink data signal is transmitted; the DL UE - specific RS indicates that the downlink demodulation reference signal is transmitted on the RE.
  • Even-numbered slots represent odd time slots:
  • odd-numbered slots represent the number of time slots:.
  • Figure 13 shows the RE mapping position of the upstream demodulated RS signal on one RB.
  • UL DM - RS Demodulation Reference Signal
  • the demodulation reference signals used for channel estimation in each channel are required to be orthogonal to each other, or Mutual interference is small. If the two demodulation reference signals are on the same RE, it is necessary to assign different orthogonal sequences to the two demodulation reference signals to ensure that the two code divisions are orthogonal; and if the two demodulation reference signals are on different REs They are naturally orthogonal.
  • the downlink demodulation RS signal and the uplink demodulation RS signal are on different REs (that is, the RE mapping position of the downlink demodulation RS signal and the uplink demodulation RS signal).
  • the RE mapping locations are staggered), so they are orthogonal.
  • Introducing Xintong The signal technology, on the same time-frequency resource, after the uplink signal and the downlink signal coexist, the uplink demodulation RS signal will be interfered by the downlink data signal, and the downlink demodulation RS signal will also be interfered by the uplink data signal, thus causing the channel
  • the estimation is not accurate, which directly affects the interference deletion and demodulation results, so it needs to be optimized.
  • the same demodulation reference signal mapping mode can be used for the uplink and downlink signals transmitted on the same time-frequency resource.
  • the RE mapping method of the uplink demodulation reference signal or the RE mapping method of the downlink demodulation reference signal is used.
  • the LPN determines which demodulation reference signal RE mapping mode is used for the uplink and downlink signals transmitted on the same time-frequency resource.
  • the uplink signal and the downlink signal are both in the RE mapping mode of the downlink demodulation reference signal, since the UE sends the uplink signal by using the RE mapping mode of the uplink demodulation reference signal by default, the LPN needs to notify before receiving the communication signal.
  • the UE performs an uplink RE mapping to a downlink RE mapping process.
  • the transmission method performed by the UE may further include: (according to the notification of the signal receiver) performing uplink RE mapping and downlink RE mapping processing, so that the communication signal received by the receiver is uplinked
  • the RE position of the demodulation reference signal is the same as the RE position of the downlink demodulation reference signal.
  • the foregoing uplink RE mapping to downlink RE mapping process includes: transmitting an uplink demodulation reference signal on a default transmission downlink demodulation reference signal RE (in LTE, both the base station and the UE know the default uplink demodulation reference) The RE mapping position of the signal and the RE mapping position of the default downlink demodulation reference signal).
  • the uplink demodulation reference signal is further A new orthogonal sequence is used, and its (new) orthogonal sequence is orthogonal to the orthogonal sequence code of the downlink demodulation reference signal.
  • the RE mapping position and the orthogonal sequence of the downlink RS demodulation signal of the eNB do not need to be adjusted or updated. In this way, the uplink and downlink signals can be transmitted according to the mapping manner of FIG.
  • the base station uses the RE mapping mode of the downlink demodulation reference signal to transmit the downlink signal by default, so Before receiving the communication signal, the LPN also needs to notify the base station to perform downlink RE mapping to uplink RE mapping processing.
  • the transmission method performed by the base station may further include: (according to the notification of the signal receiver) performing downlink RE mapping to uplink RE mapping processing, so that the communication signal received by the signal receiver is The RE position of the downlink demodulation reference signal is the same as the RE position of the uplink demodulation reference signal.
  • the downlink RE mapping to the uplink RE mapping process includes: transmitting a downlink demodulation reference signal on the RE of the default uplink demodulation reference signal, and using the (new) orthogonal sequence of the downlink demodulation reference signal It is orthogonal to the orthogonal sequence code of the above uplink demodulation reference signal.
  • the RE mapping position and the orthogonal sequence of the uplink RS demodulation signal of the UE do not need to be adjusted or updated. In this way, the uplink and downlink signals can be transmitted according to the mapping manner of FIG. It should be noted that both the base station and the UE store the orthogonal sequence set, so the new orthogonal sequence may be selected from the orthogonal sequence set.
  • the RE position of the uplink demodulation reference signal is different from the RE position of the downlink demodulation reference signal in the communication signal received by the receiver. That is, the RE mapping position of the downlink demodulation RS signal is shifted from the RE mapping position of the uplink demodulation RS signal.
  • the RE mapping position of the uplink demodulation RS signal and the RE mapping position of the downlink demodulation RS signal are originally shifted, so that the default RE mapping mode of the uplink demodulation RS signal can be maintained, and the downlink solution is The default RE mapping mode of the RS signal is unchanged. That is, the base station transmits the downlink signal and still uses the default RE mapping mode of the downlink demodulation reference signal, and the UE transmits the uplink signal and still uses the default RE mapping mode of the uplink demodulation reference signal.
  • the RE mapping positions of the uplink and downlink demodulation RS signals can also be redistributed and staggered, which will not be described herein.
  • the LPN can perform the following operations:
  • Notifying the UE to perform downlink silence/low power processing notifying the base station to perform uplink silence/low power processing. That is, before sending the uplink signal, the UE also needs to perform downlink silence according to the notification of the LPN. Silent/low power processing.
  • the base station needs to perform uplink silence/low power processing (according to the LPN notification) before transmitting the downlink signal.
  • the uplink signal is processed by downlink static/low power, and the downlink signal is processed by uplink silence/low power.
  • the downlink silence/low power processing described above may include: maintaining silence or low power transmission on the RE transmitting the downlink demodulation reference signal.
  • the above uplink silence/low power processing may include: maintaining silence or low power transmission on the RE transmitting the uplink demodulation reference signal.
  • FIG. 14 shows the mapping position of the downlink demodulation reference signal on the base station side of the present embodiment. It can be seen that the PDSCH (downlink data signal) is not transmitted at the RE position corresponding to the uplink demodulation RS signal, and remains silent.
  • the uplink RE mapping to the downlink RE mapping processing, the downlink RE mapping to the uplink RE mapping processing, the downlink silence/low power processing, and the uplink silence/low power processing may be collectively referred to as RE mapping processing.
  • Continuous/non-continuous frequency shifting and discontinuous/continuous spectrum shifting are collectively referred to as frequency shifting.
  • the LPN may notify the UE or the eNB to perform RE mapping processing while notifying the UE or the eNB to perform spectrum shifting, or may also divide Two steps to notify.
  • the RE mapping process may be performed while performing the frequency shifting, or the frequency shifting may be performed first. RE mapping processing, or performing RE mapping processing first, and then performing spectrum shifting.
  • the adjustment of the carrier mapping mode and the demodulation reference signal mapping mode does not affect the modulation mode of the uplink and downlink signals, and the modulation mode of the uplink signal is still the default modulation mode. Similarly, the modulation of the downlink signal. The mode is still the default modulation method.
  • the conventional IC processing is based on the premise that the received two signals are used in the same modulation mode, and the case where the receiving end simultaneously receives the uplink and downlink signals is not considered.
  • the uplink and downlink signals will coexist on the same time-frequency resource, and the modulation modes and multiple access modes of the uplink and downlink signals may be different, which requires optimization of the IC.
  • the foregoing interference deletion may include the following steps:
  • DTF discrete Fourier transform
  • the uplink demodulation reference signal, the downlink demodulation reference signal, and the first data signal including the uplink data signal and the downlink data signal are separated from the frequency domain mixed received signal.
  • the signal receiver may separate the uplink demodulation reference signal, the downlink demodulation reference signal, and the first data signal including the uplink data signal and the downlink data signal according to the demodulation reference information of the uplink and downlink signals acquired in advance.
  • the demodulation reference information includes the RE positions of the uplink and downlink demodulation reference signals. More specifically, the manner of separating the first data signal may include:
  • the uplink signal transmitter and the downlink signal sender use the RE mapping mode of the uplink demodulation reference signal
  • the RE positions of the uplink and downlink demodulation reference signals are the same.
  • the RE mapping method of the downlink demodulation reference signal when separating the data, please refer to FIG. 12, and the signal at the position of the downlink demodulation reference signal RE is removed, and the first data can be separated.
  • the received uplink and downlink demodulation RS signal is in the staggered manner, the signal at the position of the upper and lower demodulation reference signal RE is removed, and the first data can be separated.
  • the uplink data signal may be an interference signal
  • the downlink data signal may be a useful signal
  • the downlink data signal may be an interference signal
  • the uplink data signal may be a useful signal. More specifically, referring to FIG. 16, when the interference signal is an uplink data signal, and the useful signal is a downlink data signal, the foregoing step S23 may include:
  • IDFT inverse discrete Fourier transform
  • step S235 Multiply the uplink modulated signal estimated value by the first channel estimated value to obtain the interference signal estimated value.
  • the interference cancellation when the interference signal is the uplink data signal and the useful signal is the downlink data signal may be referred to as the first interference deletion.
  • the interference signal is a downlink data signal and the useful signal is an uplink data signal, refer to FIG. 17, and the foregoing step S23 may include:
  • S234' Multiplying the downlink modulated signal estimated value by the second channel estimated value to obtain the interference signal estimated value.
  • step S25 demodulating the second data signal
  • step S25 may include:
  • the interference cancellation performed when the interference signal is a downlink data signal and the useful signal is an uplink data signal may be referred to as a second interference deletion.
  • the LPN uses MU-MIMO (Multi-User Multiple Input Multiple Output) technology to simultaneously transmit data to the UE and the eNB (the role of the LPN may be Relay or base station). Therefore, in this scenario, the LPN acts as both the upstream signal sender and the downstream signal sender. Due to multipath transmission and the like, the UE can receive the uplink signal in addition to the downlink signal. Similarly, the eNB can receive the downlink signal in addition to the uplink signal. That is, both the UE and the eNB are signal receivers.
  • MU-MIMO Multi-User Multiple Input Multiple Output
  • the first multiple access mode is also SC-FDMA
  • the second multiple access mode is also OFDMA.
  • the uplink and downlink signals transmitted on the same time-frequency resource can be used in the downlink carrier mapping mode or the uplink carrier mapping mode. Since the LPN is simultaneously used as the sender of the uplink and downlink signals, the LPN needs to perform continuous/discontinuous frequency shifting before transmitting the uplink signal, as in the downlink carrier mapping mode.
  • the LPN needs to notify the eNB to receive at the frequency corresponding to the downlink carrier mapping mode.
  • the "receiving communication signal" performed by the signal receiver may specifically include: (according to the notification of the LPN) receiving the communication signal at a frequency point corresponding to the downlink carrier mapping mode. If the uplink carrier mapping mode is used, the LPN needs to perform discontinuous/continuous frequency shifting before transmitting the downlink signal.
  • the UE receives the downlink signal by default in the following line carrier mapping manner. Therefore, when the uplink carrier mapping mode is used, the LPN needs to notify the UE before receiving the downlink signal, and receives the frequency corresponding to the uplink carrier mapping mode.
  • the "receiving communication signal" performed by the signal receiver may specifically include: (according to the notification of the LPN) receiving the communication signal at a frequency point corresponding to the uplink carrier mapping mode.
  • the second scenario that needs to be optimized in the second scenario is the demodulation reference signal mapping.
  • the uplink and downlink signals transmitted on the same time-frequency resource may be subjected to an RE mapping manner of an uplink demodulation reference signal or an RE mapping manner of a downlink demodulation reference signal.
  • the transmission method performed by the LPN may further include: performing an uplink RE mapping to downlink RE mapping process.
  • the transmission method performed by the LPN may further include: performing a downlink RE mapping to an uplink RE mapping process.
  • the details of the uplink RE mapping and the downlink RE mapping processing, and the downlink RE mapping to the uplink RE mapping processing are described in the foregoing description, and are not described herein.
  • the RE mapping position of the downlink demodulation RS signal may be kept offset from the RE mapping position of the uplink demodulation RS signal.
  • the LPN needs to perform uplink silence/low power processing and downlink silence/low power processing before transmitting the uplink and downlink signals.
  • the LPN may also notify the eNB to perform downlink silence/low power processing (maintaining silence or low power transmission on the RE of the UE transmitting the downlink demodulation reference signal), and notifying the UE to perform uplink silence/low power. Processing (maintaining silence or low power transmission on the RE of the eNB transmitting the uplink demodulation reference signal).
  • downlink silence/low power processing maintaining silence or low power transmission on the RE of the eNB transmitting the uplink demodulation reference signal.
  • the LPN simultaneously sends the uplink signal and the downlink signal.
  • the LPN needs to notify the UE and the base station to demodulate the reference information (the RE position of the uplink and downlink demodulation reference signals) and the modulation modes of the uplink and downlink signals. So that the UE and the base station are used when the interference is deleted.
  • the UE or the base station can determine the multiple access mode of the signal according to whether the received uplink signal or the downlink signal, and whether the IDFT is used.
  • the interference signal is a downlink data signal
  • the useful signal is an uplink data signal. Therefore, the foregoing second interference cancellation needs to be performed.
  • the interference signal is an uplink data signal
  • the useful signal is a downlink data signal. Therefore, the foregoing first interference deletion needs to be performed.
  • the base station serves as a downlink signal sender, UE1 or LPN1 (UE1/LPN1) as an uplink signal sender, and at the same time, both the eNB and the UE2/LPN2 serve as signal receivers.
  • the first multiple access mode is also SC-FDMA
  • the second multiple access mode is also OFDMA.
  • the uplink and downlink signals transmitted on the same time-frequency resource may use the downlink carrier mapping mode or the uplink carrier mapping mode.
  • the eNB determines which carrier mapping mode is used for the uplink and downlink signals transmitted on the same time-frequency resource.
  • the UE1/LPN1 When the downlink carrier mapping mode is used, the UE1/LPN1 sends the uplink by default. The signal, therefore, the eNB also needs to inform the UE1/LPN1 to perform continuous/discontinuous spectrum shifting before receiving the communication signal. For UE1/LPN1, before transmitting the uplink signal, it is necessary to perform continuous/discontinuous spectrum shift according to the notification. For the related content of the continuous/discontinuous spectrum shifting, refer to the foregoing description of this document, and no further details are provided here.
  • the eNB that is the downlink signal sender needs to perform discontinuous/continuous frequency shifting on the downlink signal before transmitting the downlink signal.
  • the UE2/LPN2 receives the downlink signal by default in the following line carrier mapping manner. Therefore, before transmitting the downlink signal, the eNB needs to notify the UE2/LPN2 to receive the signal at the frequency point corresponding to the uplink carrier mapping mode.
  • the "receiving communication signal" performed by the UE2/LPN2 may specifically include: (according to the notification of the eNB) receiving the communication signal at a frequency point corresponding to the uplink carrier mapping mode. Similar to the foregoing two scenarios, the second scenario in which the third scenario needs to be optimized is the demodulation reference signal mapping manner.
  • the uplink and downlink signals transmitted on the same time-frequency resource may be subjected to an RE mapping manner of an uplink demodulation reference signal or an RE mapping manner of a downlink demodulation reference signal.
  • the UE/LPN1 sends the uplink demodulation reference signal by using the RE mapping mode of the uplink demodulation reference signal by default, before receiving the signal, the eNB also It is necessary to notify UE1/LPN1 to perform uplink RE mapping to downlink RE mapping processing. Therefore, before the downlink signal is transmitted, the transmission method performed by the UE1/LPN1 may further include: performing (downward RE mapping to uplink RE mapping processing according to the notification of the eNB).
  • the eNB When the uplink signal and the downlink signal both use the RE mapping mode of the uplink demodulation reference signal, the eNB also needs to perform downlink RE mapping to uplink RE mapping processing.
  • the specific content of the downlink RE mapping to the uplink RE mapping can be referred to the foregoing description herein, and details are not described herein.
  • the RE mapping position of the downlink demodulation RS signal may be kept offset from the RE mapping position of the uplink demodulation RS signal.
  • the eNB may also notify the UE1 LPN1 to perform downlink silence/low power processing (maintaining silence or low power transmission on the RE transmitting the downlink demodulation reference signal).
  • the eNB performs uplink silence/low power processing (maintaining silence or low power transmission on the RE transmitting the uplink demodulation reference signal).
  • the eNB may also notify UE2/LPN2 to perform uplink silence/low power processing as well.
  • interference cancellation can also be optimized.
  • both the eNB and the UE2/LPN2 need to perform signal demodulation. Therefore, the eNB also needs to notify the UE2/LPN2, demodulate the reference information (RE position of the uplink and downlink demodulation reference signals) and the modulation mode, so that the UE2 /LPN2 is used when interference is removed.
  • the eNB or the UE2/LPN2 can determine the multiple access mode of the signal according to whether the received uplink signal or the downlink signal, and whether the IDFT is used. It should be noted that, for the eNB, the interference signal is a downlink data signal, and the useful signal is an uplink data signal. Therefore, the foregoing second interference cancellation needs to be performed. For UE2/LPN2, the interference signal is an uplink data signal, and the useful signal is a downlink data signal. Therefore, the foregoing first interference deletion needs to be performed.
  • the related content of the first interference deletion and the second interference deletion may be referred to the foregoing description herein, and details are not described herein.
  • the fourth scenario will be introduced below. Still referring to FIG. 7, in the fourth scenario, the first base station (eNB1), the second base station (eNB2), UE1/LPN1 (first UE/first LPN) under eNB1, and UE2/ under eNB2 are involved. LPN2 ((second UE/second LPN)). It should be noted that the first and second are only distinguishing. As can be seen from FIG. 7, the signal receiver includes UE2/LPN2 under eNB1 and eNB2, the downlink signal sender includes eNB2, and the uplink signal sender includes UE1/LPN1.
  • eNB1 and eNB2 before transmitting or receiving a signal, eNB1 and eNB2 also need to negotiate to determine a carrier mapping manner and a demodulation reference signal mapping manner. Similar to the foregoing three scenarios, in order to optimize the carrier mapping, the uplink and downlink signals transmitted on the same time-frequency resource may be used in the downlink carrier mapping manner or the uplink carrier mapping manner.
  • the UE1/LPN1 sends the uplink signal by default in the uplink carrier mapping mode. Therefore, before receiving the communication signal, the eNB1 needs to notify the UE1/LPN1 to uplink according to the carrier mapping manner determined through negotiation.
  • the signal performs continuous/discontinuous frequency shifting.
  • the "receiving communication signal" performed by the eNB1 may specifically include: receiving the communication signal at a frequency point corresponding to the downlink carrier mapping mode.
  • the eNB2 needs to perform discontinuous/continuous spectrum shifting on the downlink signal according to the carrier mapping manner determined by negotiation before transmitting the downlink signal.
  • the UE2/LPN2 receives the downlink signal by default in the following line carrier mapping manner. Therefore, before transmitting the downlink signal, the eNB2 needs to notify the UE2/LPN2 to receive the frequency corresponding to the uplink carrier mapping mode according to the carrier mapping manner determined by the negotiation. Communication signal.
  • the "received communication signal" performed by the UE2/LPN2 may specifically include: (according to the notification of the eNB2) receiving the communication signal at a frequency point corresponding to the uplink carrier mapping mode.
  • the second scenario in which the fourth scenario needs to be optimized is the demodulation reference signal mapping manner.
  • the uplink and downlink signals transmitted on the same time-frequency resource may be subjected to an RE mapping manner of an uplink demodulation reference signal or an RE mapping manner of a downlink demodulation reference signal.
  • the eNB1 Before receiving the signal, the eNB1 also needs to notify the UE1/LPN1 to perform the uplink RE mapping to the downlink RE mapping process according to the demodulation reference signal mapping manner determined through negotiation.
  • the transmission method performed by the UE1/LPN1 may further include: performing uplink RE mapping to downlink RE mapping processing according to the notification of the eNB1.
  • the eNB2 needs to perform the downlink RE mapping to the uplink RE mapping process according to the demodulation reference signal mapping manner determined by the negotiation.
  • the RE mapping position of the downlink demodulation RS signal may be kept offset from the RE mapping position of the uplink demodulation RS signal.
  • the eNB1 may also notify the UE1/LPN1 to perform downlink silence/low power processing according to the demodulation reference signal mapping manner determined by negotiation; and the eNB2 may perform uplink silence/low power processing according to the demodulation reference signal mapping manner determined by negotiation ( Keep silent or low power transmission on the RE transmitting the uplink demodulation reference signal).
  • eNB2 may also notify UE2/LPN2 to also perform uplink silence/low power processing.
  • interference cancellation can also be optimized. Since both eNB1 and UE2/LPN2 need to perform signal demodulation in this scenario, eNB2 needs to notify UE2/LPN2, demodulate reference information (RE position of uplink and downlink demodulation reference signals) and modulation mode for UE2/ LPN2 is used when interference is removed.
  • the eNB1 or the UE2/LPN2 can determine the multiple access mode of the signal according to whether the received uplink signal or the downlink signal, and whether the IDFT is used. It should be noted that, for eNB1, the interference signal is a downlink data signal, and the useful signal is an uplink data signal. Therefore, the foregoing second interference cancellation needs to be performed. For UE2/LPN2, the interference signal is an uplink data signal, and the useful signal is a downlink data signal. Therefore, the foregoing first interference deletion needs to be performed. The content of the first interference deletion and the second interference deletion can be referred to See the foregoing description of this document, and will not be described here.
  • the embodiment of the present invention further provides a transmission device.
  • the transmission device 190 may include: a receiving unit 1 for receiving a communication signal.
  • the communication signal includes an uplink signal and a downlink signal transmitted on the same time-frequency resource; and the uplink signal and the downlink signal use at least the same carrier mapping manner.
  • the uplink number corresponds to the first multiple access mode
  • the downlink signal corresponds to the second multiple access mode.
  • the interference deletion unit (IC unit) 2 is configured to perform interference cancellation on the communication signal according to the first multiple access mode and the second multiple access mode.
  • the transmission device 200 may include: an uplink sending unit 3, configured to send an uplink signal.
  • the uplink signal and the downlink signal transmitted on the same time-frequency resource use at least the same carrier mapping manner.
  • the transmission apparatus 300 may include: a downlink sending unit 4, configured to send a downlink signal, and the downlink signal is the same as the uplink signal transmitted on the same time-frequency resource. the way.
  • the receiving unit 1 may be specifically configured to: receive the communication signal at a frequency point corresponding to the downlink carrier mapping mode.
  • the transmission device 200 as an uplink signal sender may further include: a continuous/non-contiguous frequency shifting unit 5, configured to perform a continuous/discontinuous spectrum before the uplink transmitting unit 3 transmits the uplink signal. Move to shift the frequency of the uplink signal to the frequency corresponding to the downlink carrier mapping mode.
  • the receiving unit 1 is specifically configured to: receive the communication signal at a frequency point corresponding to the uplink carrier mapping mode.
  • the transmission device 300 as a downlink signal sender may further include:
  • the discontinuous/continuous frequency shifting unit 6 is configured to perform discontinuous/continuous spectrum shifting before the downlink transmitting unit 4 transmits the downlink signal, so that the frequency of the downlink signal is moved to the frequency point corresponding to the uplink carrier mapping mode.
  • the transmission device corresponding to the uplink signal side may further include a first notification unit, configured to notify the signal receiver before the signal receiver sends the uplink signal.
  • the signal is received at a frequency point corresponding to the downlink carrier mapping mode.
  • the signal receiver may further include a second notification unit for notifying the uplink signal sender to perform continuous/discontinuous frequency shifting before receiving the communication signal.
  • the transmission device corresponding to the downlink signal sender may further include a third notification unit, configured to notify the signal receiver before the downlink signal is transmitted, at a frequency corresponding to the uplink carrier mapping mode. receive signal.
  • the transmission device corresponding to the signal receiver may further include a fourth notification unit, configured to notify the downlink signal sender to perform the discontinuous/continuous frequency shift before transmitting the downlink signal.
  • the signal receiver (eNB1) and the downlink signal sender (eNB2) may further include a negotiating unit for negotiating and determining a carrier mapping manner and a demodulation reference signal mapping manner.
  • the above uplink signal and downlink signal can use the same demodulation reference signal mapping method.
  • the uplink is used to perform uplink RE mapping and downlink RE mapping processing before the uplink transmitting unit transmits the uplink signal.
  • the transmission device 300 corresponding to the downlink signal sender may further include a downlink RE mapping to uplink RE mapping unit, which is configured to send the downlink in the downlink sending unit. Before the signal, perform downlink RE mapping to uplink RE mapping Processing.
  • the uplink signal and the downlink signal may also use different demodulation reference signal mapping modes. When different demodulation reference signal mapping modes are used (the RE mapping position of the downlink demodulation RS signal is offset from the RE mapping position of the uplink demodulation RS signal), the transmission device 200 corresponding to the uplink signal sender may further include downlink silence.
  • the low power unit is configured to perform downlink silence/low power processing before the sending unit sends the uplink signal
  • the transmission device 300 corresponding to the downlink signal sender may further include an uplink silence/low power unit, configured to send in the downlink sending unit. Perform uplink silence/low power processing before the downlink signal.
  • the transmission device corresponding to the uplink signal sender may include an uplink signal generating unit. Referring to FIG.
  • the uplink signal generating unit includes a continuous channel coding module, an uplink modulation module, a DTF module, and an IDFT module, and further includes/ a discontinuous frequency shifting module (for performing the aforementioned continuous/discontinuous spectrum shifting), a first RE mapping processing module (for performing uplink RE mapping to downlink RE mapping processing or downlink silence/low power processing), continuous/non- Continuous frequency shift module.
  • the transmission device corresponding to the downlink signal sender may include a downlink signal generating unit.
  • the downlink signal generating unit includes discontinuous/in addition to the conventional channel coding module, the downlink modulation module, and the IDFT module.
  • the IC unit 2 may include:
  • a DFT module configured to perform a discrete Fourier transform (DTF) on the communication signal to obtain a frequency domain mixed received signal (step S21); and a separation module, configured to separate the uplink demodulation reference signal and the downlink from the frequency domain mixed received signal a demodulation reference signal, and a first data signal including an uplink data signal and a downlink data signal (step S22); a first channel estimation module, configured to perform channel estimation according to the separated uplink demodulation reference signal, to obtain a first channel estimation a value H_a ⁇ (step S231), or performing channel estimation according to the downlink demodulation reference signal to obtain a channel estimation value H_b ⁇ of the interference signal (step S231'); a first channel equalization module, configured to perform channel equalization according to the separated uplink demodulation reference signal and the first data signal, to obtain a first equalization result (step S232), or according to the separated downlink demodulation reference signal and the first Data signal is channel equalized to obtain a second equalization result (step S232
  • a first IDFT module configured to perform IDFT on the first equalization result (step S233); and a first demodulation module, configured to solve an uplink modulated signal value after the IDFT according to a modulation mode of the uplink signal Adjusting, obtaining an uplink modulated signal estimated value M_a ⁇ (step S234), or demodulating the second equalized result according to a modulation scheme of the downlink signal to obtain a downlink modulated signal estimated value M_b ⁇ (step S233'); multiplied a module, configured to multiply the uplink modulated signal estimated value by the first channel estimated value to obtain the interference signal estimated value (step S235), or multiply the downlink modulated signal estimated value by the second channel estimated value Obtaining the interference signal estimation value (step S234'); the subtracting module is configured to delete the interference signal estimated value from the first data signal, and obtain the second data signal (step S24); the second channel estimation module is configured to: Performing channel estimation according to the separated downlink demodulation reference signal to obtain a second channel estimation
  • a second IDFT module configured to perform IDFT on the first equalization result (step S253,); a second demodulation module, configured to demodulate the second equalization result according to a modulation mode of the downlink signal, to obtain a downlink Demodulating the signal estimated value M_b ⁇ (step S253) or demodulating the first equalized result after the IDFT according to the modulation mode of the uplink signal to obtain an uplink demodulated signal estimated value M_a ⁇ (step S254, ); a second channel decoding module, configured to perform channel decoding on the input signal to obtain data bit 1 (Step S254), or data bit 2 (step S255).
  • Figure 26 shows a hardware architecture of the above described transmission device, which may comprise: at least one processor 261, such as a CPU, at least one network interface 264 or other user interface 263, memory 265, at least one communication bus 262.
  • Communication bus 262 is used to implement connection communication between these components.
  • the transmission timing device 260 optionally includes a user interface 263, a keyboard or a pointing device, such as a trackball, a touchpad or a tactile display.
  • Memory 265 may contain high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.
  • the memory 265 can optionally include at least one storage device located remotely from the aforementioned processor 261.
  • memory 265 stores the following elements, executable modules or data structures, or a subset thereof, or their extension set:
  • Operating system 2651 which contains various system programs for implementing various basic services and handling hardware-based tasks;
  • Application module 2652 which contains various applications for implementing various application services.
  • the application module 2652 When acting as a signal receiver, the application module 2652 includes, but is not limited to, the receiving unit 1 and the IC unit 2. For the specific implementation of each module in the application module 2652, refer to the corresponding module in the embodiment shown in FIG. 19, and details are not described herein.
  • the processor 261 is used to:
  • the interference cancellation is performed on the communication signal according to the first multiple access mode and the second multiple access mode.
  • processor 261 can also perform other steps performed by the signal receiver described in the method section of this document, and the refinement of each step, which is not described herein.
  • the application module 2652 includes but is not limited to the uplink transmitting unit 3.
  • the processor 261 is configured to: transmit an uplink signal by calling a program or instruction stored in the memory 265.
  • the uplink signal and the downlink signal transmitted on the same time-frequency resource use at least the same carrier mapping manner.
  • the foregoing processor 261 can also perform other steps that can be performed by the uplink signal sender described in the method section of this disclosure, and the refinement of each step, which is not described herein.
  • the application module 2652 includes but is not limited to the downlink transmitting unit 4.
  • each module in the application module 2652 refer to the corresponding modules in the embodiment shown in FIG. 21 or FIG. 23, and details are not described herein.
  • the processor 261 is configured to: send a downlink signal, and use the same carrier mapping manner as the uplink signal transmitted on the same time-frequency resource by using a program or an instruction stored in the memory 265.
  • the foregoing processor 261 can also perform other steps that can be performed by the downlink signal sender described in the method section of this disclosure, and the refinement of each step, which is not described herein.
  • the various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other.
  • the description is relatively simple, and the relevant parts can be referred to the method part for description.
  • a computer device (which may be a personal computer, server, or network device, etc.) performs the methods of various embodiments of the present invention.
  • a computer device which may be a personal computer, server, or network device, etc.) performs the methods of various embodiments of the present invention.
  • the above description of the embodiments provided is to enable those skilled in the art to make or use the invention.
  • Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

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Abstract

本发明实施例公开了传输方法及装置。该方法包括:接收方接收通信信号,所述通信信号包括在同一时频资源上传输的上行信号和下行信号;所述上行信号和下行信号采用相同的载波映射方式,所述上行号对应第一多址方式,所述下行信号对应第二多址方式;接收方根据所述第一多址方式和所述第二多址方式,对所述通信信号进行干扰删除。在本发明实施例中,同一时频资源上传输上、下行信号采用相同的载波映射方式,这样可克服引入新技术后,同一时频资源的上、下行信号载波映射方式不同的问题,有利于通信信号接收方进行干扰删除。

Description

传输方法及装置
本申请要求于 2013 年 11 月 12 日提交中国专利局、 申请号为 201310561398.1、 发明名称为"传输方法及装置,,的国内申请的优先权, 其全部 内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域, 更具体地说, 涉及传输方法及装置。
背景技术
现有 LTE ( Long Term Evolution, 长期演进) 系统支持时分双工 (Time Division Duplex, TDD )和频分双工 ( Frequency Division Duplex, FDD ) 方式, 上行釆用 SC-FDMA方式, 下行釆用 OFDMA方式, 因此, 现有 LTE系统中上下 行的载波映射方式是不同的, 在相同的时频资源上仅会釆用一种载波映射方 式进行通信。 为了提升资源利用率、 降低成本, 现有 LTE技术可引入的新通信技术, 例 如, wireless backhaul, 全双工收发信机、 动态 TDD系统等。 上述新通信技术 要求在相同时频资源上, 上行信号与下行信号共存。 在实施本发明创造时, 发明人发现, 引入新通信技术后, 在同一时频资 源上将同时存在上、 下行载波映射方式, 也即, 在同一时频资源上将存在不 同的载波映射方式, 从而不利于通信信号接收方进行干扰删除(IC ) 。
发明内容
有鉴于此, 本发明实施例的目的在于提供传输方法及装置, 以解决上述 问题。 为实现上述目的, 本发明实施例提供如下技术方案: 根据本发明实施例的第一方面, 提供一种传输方法, 包括: 接收方接收通信信号, 所述通信信号包括在同一时频资源上传输的上行 信号和下行信号; 所述上行信号和下行信号釆用相同的载波映射方式, 所述 上行号对应第一多址方式, 所述下行信号对应第二多址方式; 接收方根据所述第一多址方式和所述第二多址方式, 对所述通信信号进 行干扰删除。 结合第一方面, 在第一种可能的实现方式中, 所述相同的载波映射方式 为下行载波映射方式; 所述接收通信信号包括: 在所述下行载波映射方式对 应的频点上接收通信信号; 或者, 所述相同的载波映射方式为上行载波映射 方式; 所述接收通信信号包括: 在所述上行载波映射方式对应的频点上接收 通信信号。 结合第一方面, 在第二种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号; 所述上行信号和下行信号釆用, 所述下行解调参考信号的资源单元 RE映射方式; 所接收到的通信信号中, 上行解调参考信号的 RE位置与下行 解调参考信号的 RE位置相同; 或者, 所述上行信号和下行信号釆用, 所述上 行解调参考信号的 RE映射方式; 所接收到的通信信号中, 下行解调参考信号 的 RE位置与上行解调参考信号的 RE位置相同。 结合第一方面, 在第三种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号; 所接收到的通信信号中, 所述上行解调参考信号的 RE位置不同于所 述下行解调参考信号的 RE位置; 所接收到的通信信号中, 上行信号是经过下 行静默 /低功率处理的, 下行信号经过上行静默 /低功率处理的。 结合第一方面的第二种可能的实现方式或第三种可能的实现方式, 在第 四种可能的实现方式中, 所述干扰删除包括: 对所述通信信号进行离散傅里叶变换, 得到频域混合接收信号; 从所述频域混合接收信号中分离出上行解调参考信号、 下行解调参考信 号, 以及第一数据信号, 所述第一数据信号包含上行数据信号和下行数据信 号;
根据上行信号或下行信号的调制方式, 对第一数据信号进行解调, 得到 干扰信号估计值, 所述干扰信号为上行数据信号或下行数据信号; 从所述第一数据信号中删除所述干扰信号估计值, 获取第二数据信号; 对所述第二数据信号进行解调, 得到数据比特。 结合第一方面的第四种可能的实现方式, 在第五种可能的实现方式中, 所述干扰信号为上行数据信号, 所述第一多址为单载波频分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA; 所述根据上行信号的调制方式, 对第一数据信号进行解调, 得到干扰信 号估计值包括: 根据上行解调参考信号进行信道估计 , 得到第一信道估计值; 根据上行解调参考信号和第一数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行离散傅里叶逆变换 IDFT, 所述 IDFT 与所述 SC-FDMA方式相对应; 根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值; 将所述上行调制信号估计值与所述第一信道估计值相乘, 得到所述干扰 信号估计值; 所述对第二数据信号进行解调包括: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第二数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对所述第二均衡结果进行解调, 得到下行调制 信号估计值; 对所述下行调制信号估计值进行信道解码, 得到数据比特。 结合第一方面的第四种可能的实现方式, 在第六种可能的实现方式中, 所述干扰信号为下行数据信号, 所述第一多址为单载波频分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA; 所述根据下行信号的调制方式, 对第一数据信号进行解调, 得到干扰信 号估计值包括: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对将所述第二均衡结果进行解调, 得到下行调 制信号估计值; 将所述下行调制信号估计值与所述第二信道估计值相乘, 得到所述干扰 信号估计值; 所述对第二数据信号进行解调包括: 根据上行解调参考信号进行信道估计 , 得到第一信道估计值; 根据上行解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行 IDFT, 所述 IDFT与所述 SC-FDMA方式相对 应;
根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值;
对所述上行调制信号估计值进行信道解码, 得到数据比特。 根据本发明实施例的第二方面, 提供一种传输方法, 包括: 上行信号发送方发送上行信号, 所述上行信号和在同一时频资源上传输 的下行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所述 下行信号对应第二多址方式。 结合第二方面, 在第一种可能的实现方式中, 当所述相同的载波映射方 式为下行载波映射方式时, 在发送上行信号之前, 所述方法还包括: 上行信 号发送方进行连续 /非连续频谱搬移, 以使所述上行信号的频点搬移至所述下 行载波映射方式对应的频点上。
结合第二方面的第一种可能的实现方式, 在第二种可能的实现方式中, 所述连续 /非连续频谱搬移包括: 将上行信号的连续频谱, 从中心点向两侧各 搬移半个子载波宽度, 得到非连续频谱; 所述非连续频谱的中心空出一个子 载波宽度。
结合第二方面, 在第三种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号;
当所述上行信号和下行信号釆用, 所述下行解调参考信号的资源单元 RE 映射方式时, 在发送上行信号之前, 所述方法还包括: 上行信号发送方执行上行 RE映射转下行 RE映射处理, 以令信号接收方 接收到的通信信号中, 上行解调参考信号的 RE位置与下行解调参考信号的 RE位置相同。
结合第二方面, 在第四种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号; 当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE位置时, 在发送上行信号之前, 所述方法还包括: 上行信号发送方执行下 行静默 /低功率处理。
结合第二方面第四种可能的实现方式, 在第五种可能的实现方式中, 所 述上行 RE映射转下行 RE映射处理包括: 在传输所述下行解调参考信号的 RE上,传输上行解调参考信号,并且所述上行解调参考信号釆用的正交序列, 与所述下行解调参考信号的正交序列码分正交。 根据本发明实施例的第三方面, 提供一种传输方法, 包括: 下行信号的发送方发送下行信号, 所述下行信号与在同一时频资源上传 输的上行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所 述下行信号对应第二多址方式。 结合第三方面, 在第一种可能的实现方式中, 当所述相同的载波映射方 式为上行载波映射方式时, 在发送下行信号之前, 所述方法还包括: 下行信号的发送方进行非连续 /连续频谱搬移, 以使所述下行信号的频点 搬移至所述上行载波映射方式对应的频点上。 结合第三方面第一种可能的实现方式, 在第二种可能的实现方式中, 所 述非连续 /连续频谱搬移包括: 将下行信号的非连续频谱, 从两侧向中心点各 搬移半个子载波宽度, 得到连续频谱; 所述非连续频谱的中心空出一个子载 波宽度。 结合第三方面, 或者第三方面第一种可能的实现方式, 或第三方面第二 种可能的实现方式, 在第三种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号; 当所述上行信号和下行信号釆用, 所述上行解调参考信号的资源单 元 RE映射方式时, 在发送下行信号之前, 所述方法还包括: 下行信号的发送 方执行下行 RE映射转上行 RE映射处理, 以令信号接收方接收到的通信信号 中, 下行解调参考信号的 RE位置与上行解调参考信号的 RE位置相同。 结合第三方面, 或者第三方面第一种可能的实现方式, 或第三方面第二 种可能的实现方式, 在第四种可能的实现方式中, 所述上行信号包括上行解 调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和下行数 据信号; 当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE位置时, 在发送下行信号之前, 所述方法还包括: 下行信号的发送方执行 上行静默 /低功率处理。 结合第三方面第三种可能的实现方式, 在第五种可能的实现方式中, 所 述下行 RE映射转上行 RE映射处理包括: 在传输所述上行解调参考信号的 RE上,传输下行解调参考信号,并且所述下行解调参考信号釆用的正交序列, 与所述上行解调参考信号的正交序列码分正交。 根据本发明实施例的第四方面, 提供一种传输装置, 包括: 接收单元, 用于接收通信信号, 所述通信信号包括在同一时频资源上传 输的上行信号和下行信号; 所述上行信号和下行信号釆用相同的载波映射方 式; 所述上行号对应第一多址方式, 所述下行信号对应第二多址方式; 干扰删除单元, 用于根据所述第一多址方式和所述第二多址方式, 对所 述通信信号进行干扰删除。 结合第四方面, 在第一种可能的实现方式中, 当所述相同的载波映射方 式为下行载波映射方式时, 在接收通信信号方面, 所述接收单元具体用于: 在所述下行载波映射方式对应的频点上接收通信信号; 或者, 当所述相同的 载波映射方式为上行载波映射方式时, 在接收通信信号方面, 所述接收单元 具体用于: 在所述上行载波映射方式对应的频点上接收通信信号。 结合第四方面, 在第二种可能的实现方式中, 在干扰删除方面, 所述干 扰删除单元具体用于: 对所述通信信号进行离散傅里叶变换, 得到频域混合接收信号; 从所述频域混合接收信号中分离出上行解调参考信号、 下行解调参考信 号, 以及第一数据信号, 所述第一数据信号包含上行数据信号和下行数据信 号;
根据上行信号或下行信号的调制方式, 对第一数据信号进行解调, 得到 干扰信号估计值, 所述干扰信号为上行数据信号或下行数据信号; 从第一数据信号中删除所述干扰信号估计值, 获取第二数据信号; 对第二数据信号进行解调, 得到数据比特。 结合第四方面第二种可能的实现方式, 在第三种可能的实现方式中, 所 述第一多址为单载波频分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA; 当所述干扰信号为上行数据信号时, 在根据上行信号的调制方式, 对第 一数据信号进行解调, 得到干扰信号估计值方面, 所述干扰删除单元具体用 于:
根据上行解调参考信号进行信道估计 , 得到第一信道估计值; 根据上行解调参考信号和第一数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行离散傅里叶逆变换 IDFT, 所述 IDFT 与所述 SC-FDMA方式相对应; 根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值;
将所述上行调制信号估计值与所述第一信道估计值相乘, 得到所述干扰 信号估计值;
在对第二数据信号进行解调方面, 所述干扰删除单元具体用于: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第二数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对所述第二均衡结果进行解调, 得到下行调制 信号估计值; 对所述下行调制信号估计值进行信道解码, 得到数据比特; 或者,
当所述干扰信号为下行数据信号时 , 在根据下行信号的调制方式, 对第一数据信号进行解调, 得到干扰信号 估计值方面, 所述干扰删除单元具体用于: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对将所述第二均衡结果进行解调, 得到下行调 制信号估计值; 将所述下行调制信号估计值与所述第二信道估计值相乘, 得到所述干扰 信号估计值;
在对第二数据信号进行解调方面, 所述干扰删除单元具体用于: 根据上行解调参考信号进行信道估计 , 得到第一信道估计值; 根据上行解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行 IDFT, 所述 IDFT与所述 SC-FDMA方式相对 应;
根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值; 对所述上行调制信号估计值进行信道解码, 得到数据比特。 根据本发明实施例的第五方面, 提供传输装置, 包括: 上行发送单元, 用于发送上行信号, 所述上行信号和在同一时频资源上传输的下行信号釆用 相同的载波映射方式, 所述上行号对应第一多址方式, 所述下行信号对应第 二多址方式。 结合第五方面, 在第一种可能的实现方式中, 当所述相同的载波映射方 式为下行载波映射方式时, 所述装置还包括: 连续 /非连续频谱搬移单元, 用 于在所述上行发送单元发送上行信号之前, 执行连续 /非连续频语搬移, 以使 所述上行信号的频点搬移至所述下行载波映射方式对应的频点上。 结合第五方面或第五方面第一种可能的实现方式, 在第二种可能的实现 方式中, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信 号包括下行解调参考信号和下行数据信号; 当所述上行信号和下行信号釆用 , 所述下行解调参考信号的资源单元 RE映射方式时, 所述装置还包括上行 RE 映射转下行 RE映射单元, 用于在所述上行发送单元发送上行信号之前,执行 上行 RE映射转下行 RE映射处理, 以令信号接收方接收到的通信信号中, 上 行解调参考信号的 RE位置与下行解调参考信号的 RE位置相同。 结合第五方面或第五方面第一种可能的实现方式, 在第三种可能的实现 方式中, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信 号包括下行解调参考信号和下行数据信号; 当所述上行解调参考信号的 RE位 置不同于所述下行解调参考信号的 RE位置时, 所述装置还包括下行静默 /低 功率单元, 用于在所述发送单元发送上行信号之前, 执行下行静默 /低功率处 理。 根据本发明实施例的第六方面, 提供一种传输装置, 包括: 下行发送单 元, 用于发送下行信号, 所述下行信号与在同一时频资源上传输的上行信号 釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所述下行信号对 应第二多址方式。 结合第六方面, 在第一种可能的实现方式中, 当所述相同的载波映射方 式为上行载波映射方式时, 所述装置还包括非连续 /连续频语搬移单元, 用于 在所述下行发送单元发送下行信号之前, 进行非连续 /连续频谱搬移, 以使所 述下行信号的频点搬移至所述上行载波映射方式对应的频点上。
结合第六方面或第六方面第一种可能的实现方式, 在第二种可能的实现 方式中, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信 号包括下行解调参考信号和下行数据信号; 当所述上行信号和下行信号釆用 , 所述上行解调参考信号的资源单元 RE映射方式时, 所述装置还包括下行 RE 映射转上行 RE映射单元, 用于在所述下行发送单元发送下行信号之前,执行 下行 RE映射转上行 RE映射处理, 以令信号接收方接收到的通信信号中, 下 行解调参考信号的 RE位置与上行解调参考信号的 RE位置相同。 结合第六方面或第六方面第一种可能的实现方式, 在第三种可能的实现 方式中, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信 号包括下行解调参考信号和下行数据信号; 当所述上行解调参考信号的 RE位 置不同于所述下行解调参考信号的 RE位置时, 所述装置还包括上行静默 /低 功率单元, 用于在所述下行发送单元发送下行信号之前, 执行上行静默 /低功 率处理。 可见, 在本发明实施例中, 同一时频资源上传输上、 下行信号釆用相同 的载波映射方式, 这样可克服引入新技术后, 同一时频资源的上、 下行信号 载波映射方式不同的问题, 有利于通信信号接收方进行干扰删除。
附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面 描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 2为本发明实施例提供的传输方法流程图; 图 3为本发明实施例提供的交互流程图; 图 4为本发明实施例提供的上行信号与下行信号共存的场景; 图 5为本发明实施例提供的上行信号与下行信号共存的另一场景; 图 6为本发明实施例提供的上行信号与下行信号共存的又一场景; 图 7为本发明实施例提供的上行信号与下行信号共存的又一场景; 图 8为本发明实施例提供的将上行载波映射频语搬移成下行载波映射频 谱示意图;
图 9为本发明实施例提供的搬移成下行载波映射频语后的示意图; 图 10为本发明实施例提供的将下行载波映射频语搬移成上行载波映射频 谱示意图;
图 11为本发明实施例提供的搬移成上行载波映射频谱后的示意图; 图 12为本发明实施例提供的下行解调 RS信号的 RE映射位置示意图; 图 13为本发明实施例提供的上行解调 RS信号的 RE映射位置示意图; 图 14为本发明实施例提供的下行解调 RS信号的另一 RE映射位置示意 图; 图 15为本发明实施例提供的干扰删除流程图; 图 16为本发明实施例提供的干扰删除另一流程图; 图 17为本发明实施例提供的干扰删除又一流程图; 图 18为本发明实施例提供的传输装置结构示意图; 图 19为本发明实施例提供的传输装置另一结构示意图; 图 20为本发明实施例提供的传输装置又一结构示意图; 图 21为本发明实施例提供的传输装置又一结构示意图; 图 22为本发明实施例提供的传输装置又一结构示意图; 图 23为本发明实施例提供的上行信号生成单元结构示意图; 图 24为本发明实施例提供的下行信号生成单元结构示意图; 图 25为本发明实施例提供的 IC单元结构示意图; 图 26为本发明实施例提供的传输装置又一结构示意图。
具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而 不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例 , 都属于本发明保护的范围。
在现有 LTE技术中, 在相同的时频资源上, LTE系统仅传输上行信号或 下行信号。 请参见图 1 (横坐标为频域坐标, 纵坐标为频域幅度), 现有 LTE 技术中,在某一 RB ( resource block,时频资源)上,上行釆用 SC-FDMA( Single Carrier-Frequency Division Multiplexing Access,单载波频分多址)方式, 子载波 在频谱上是连续的, 而下行釆用 OFDMA ( Orthogonal Frequency Division Multiplexing Access,正交频分多址)方式,在频傳中心空出一个子载波不使用, 空出的子载波为直流载波 ( DC , direct carrier)分量。 在实施本发明创造时, 发明人发现, 为了提升资源利用率、 降低成本而 引入的新通信技术, 有很多要求在相同时频资源上, 上行信号与下行信号共 存, 例如, wireless backhaul,全双工收发信机、动态 TDD系统等新通信技术。 而由图 1可知, 现有 LTE技术中, 上下行载波映射方式不对齐, 相差半个子 载波, 因此, 在同一时频资源上同时共存上、 下行信号后, 不对齐的载波映 射方式将不利于后续进行干扰删除(IC ), 需要进行优化。 为进行优化, 本发明实施例提供传输方法及装置。 需要说明的是, 在传输上、 下行信号过程中, 涉及上行信号发送方、 下 行信号的发送方, 以及信号接收方。 因此, 上述传输方法的执行主体可为上 行信号发送方、 下行信号发送方或信号接收方。 也即, 传输装置可为上行信 号发送方、 下行信号发送方或信号接收方。 当执行主体为上行信号发送方时, 其所对应的传输方法至少可包括如下 步骤: 发送上行信号, 该上行信号和在同一时频资源上传输的下行信号釆用相 同的载波映射方式。
而当执行主体为下行信号的发送方, 上述传输方法可包括: 发送下行信号, 该下行信号与在同一时频资源上传输的上行信号釆用相 同的载波映射方式。
则当执行主体为接收方时, 参见图 2, 上述传输方法至少可包括:
51、 接收通信信号。 其中, 所接收到的通信信号包括在同一时频资源上传输的上行信号和下 行信号, 并且, 该上行信号和下行信号釆用相同的载波映射方式。 此外, 上 述上行信号对应第一多址方式, 下行信号对应第二多址方式;
52、 根据第一多址方式和第二多址方式, 对通信信号进行干扰删除。 上行信号发送方、 下行信号的发送方, 以及信号接收方之间的交互过程 可参见图 3。 在本实施例中, 在同一时频资源上接收到的上行信号和下行信号釆用相 同的载波映射方式, 从而有利于信号接收方进行干扰删除。 本文后续将对如 何进行干扰删除进行详细介绍。 在本发明其他实施例中, 上述所有实施例中在同一时频资源上传输的上 行信号和下行信号, 可釆用相同的解调参考信号映射方式, 或者, 可釆用不 同的解调参考信号映射方式, 本文后续将进行详细介绍。
在引入新通信技术后, 在相同时频资源上, 上行信号与下行信号共存的 场景大体可有以下几种:
第一种场景, 请参见图 4, LPN ( Low Power Node, 低功耗节点)在同一 时频资源上接收 UE发送的上行信号和基站(eNB )发送的下行信号。
第二种场景, 请参见图 5, LPN在同一时频资源上向 UE发送下行信号, 向基站(eNB )发送上行信号。
第三种场景,请参见图 6,基站(eNB )在同一时频资源上接收 UE1/LPN1 发送下行信号, 并向 UE2/LPN2发送下行信号。
第四种场景, 请参见图 7, 在动态 TDD系统中, 由于不同小区的业务需 求可能不同, 导致了相邻小区上下行子帧配比不同, 就存在了在同一时频资 源上, 相邻小区中 UE1/LPN1向第一基站(eNBl )发送上行信号, 第二基站 ( eNB2 ) 向 UE2/LPN2发送下行信号。 下面将分不同的场景, 对本发明欲保护的传输方法进行详细介绍。 现先 介绍第一种场景。 在第一种场景中, 仍请参见图 4, LPN作为信号接收方 (LPN的角色可 为中继或基站), UE作为上行信号发送方, eNB作为下行信号发送方。 在本 场景中, 上述第一多址方式为 SC-FDMA, 上述第二多址方式为 OFDMA。 为进行载波映射方面的优化, 可令在同一时频资源上传输的上、 下行信 号釆用同样的载波映射方式, 例如, 令在同一时频资源上传输的上、 下行信 号均釆用下行载波映射方式, 或者, 均釆用上行载波映射方式。
在本场景中, 由 LPN决定同一时频资源上传输的上、 下行信号釆用何种 载波映射方式。 当同一时频资源上传输的上、 下行信号釆用下行载波映射方式时, 由于 UE默认以上行载波映射方式发送上行信号,因此,在接收通信信号之前, LPN 还需要通知 UE执行连续 /非连续频语搬移。
也即在本场景中, 信号接收方 (LPN )对应的传输方法还可包括: 通知 UE (上行信号发送方)对上行信号执行连续 /非连续频谱搬移。
相对应的, 在发送上行信号之前, UE还需要(根据信号接收方的通知) 进行连续 /非连续频谱搬移, 以使上行信号的频点搬移至下行载波映射方式对 应的频点上。 上述连续 /非连续频语搬移的目的是将上行载波映射频谱搬移成下行载波 映射频谱, 请参见图 8, 更具体的, 其可包括: 将上行信号(在该时频资源上 的) 的连续频谱, 从中心点向两侧各搬移半个子载波宽度, 得到非连续频谱 (请参见图 9 )。 这样, 在同一 RB上, UE (上行信号发送方)和 eNB (下行信号发送方), 均釆用图 9 所示的下行载波映射方式发送上、 下行信号, 也即, 在同一时频 资源上传输的上、 下行信号釆用了同样的载波映射方式。 相对应的, LPN (信号接收方) 所执行的"接收通信信号 "则可具体包括: 在下行载波映射方式对应的频点上接收通信信号。 而当同一时频资源上传输的上、 下行信号均釆用上行载波映射方式时, 由于 eNB默认以下行载波映射方式发送下行信号, 因此, 在接收通信信号之 前, LPN还需要通知 eNB执行非连续 /连续频谱搬移。
也即在本场景中, 信号接收方 (LPN )对应的传输方法还可包括: 通知 eNB (下行信号发送方)对下行信号执行非连续 /连续频语搬移。
而相应的, 在发送下行信号之前, eNB还需要(根据信号接收方的通知) 对下行信号执行非连续 /连续频语搬移, 以使下行信号的频点搬移至上行载波 映射方式对应的频点上。
上述非连续 /连续频语搬移的目的是将下行载波映射频谱搬移成上行载波 映射频谱。 更具体的, 请参见图 10, 其可包括: 将下行信号的非连续频谱, 从两侧向中心点各搬移半个子载波宽度, 得到连续频谱(请参见图 11 )。 这样, 在同一 RB上, UE (上行信号发送方)和 eNB (下行信号发送方 ), 均釆用图 11所示的上行载波映射方式发送上、 下行信号, 从而亦可实现, 在 同一时频资源上传输的上、 下行信号釆用相同的载波映射方式。
与之相对应的, LPN (信号接收方)所执行的"接收"则可具体包括: 在上 行载波映射方式对应的频点上接收。
上述上行信号可包括上行解调参考 (RS )信号和上行数据信号; 上述下 行信号可包括下行解调参考 (RS )信号和下行数据信号。
图 12示出了在一个 RB上, 下行解调 RS信号的 RE映射位置。需要注意 的是,在图 12中,横坐标为时隙,纵坐横为子载波, PDSCH( Physical Downlink Shared Channel, 物理下行共享信道)表示, 在此 RE上用物理下行共享信道 承载来自传输信道 DSCH (下行链路共享信道) 的数据, 也即用于传输下行 数据信号; DL UE - specific RS 表示在此 RE 上传输下行解调参考信号。 even-numbered slots表示奇数时隙: , odd-numbered slots表示禺数时隙:。
图 13则示出了在一个 RB上,上行解调 RS信号的 RE映射位置。需要注 意的是, 在图 13中, UL DM - RS ( Demodulation Reference Signal, 解调参考 信号)表示在此 RE上传输上行解调参考信号。 需要说明的是, 要进行干扰删除、 信号解调, 首先要进行信道估计, 为 了保证信道估计的准确性, 就要求各路信号中用来做信道估计的解调参考信 号间彼此正交, 或相互干扰很小。 如果两个解调参考信号在相同的 RE上,需要为两个解调参考信号分配不 同的正交序列, 以保证二者码分正交; 而如果两个解调参考信号在不同的 RE 上, 他们自然是正交的。
在现有 LTE系统中, 参见图 12和图 13可知, 下行解调 RS信号和上行 解调 RS信号在不同的 RE上(也即, 下行解调 RS信号的 RE映射位置与上 行解调 RS信号的 RE映射位置相错开), 因此他们是正交的。 而在引入新通 信技术, 令同一时频资源上, 上行信号与下行信号共存后, 上行解调 RS信号 将受到下行数据信号的干扰、 而下行解调 RS信号也将受到上行数据信号干 扰, 这样, 会导致信道估计不准, 从而直接影响干扰删除、 解调结果, 因此 需要进行优化。 为进行该方面的优化, 可令在同一时频资源上传输的上、 下行信号釆用 同样的解调参考信号映射方式。 例如, 均釆用上行解调参考信号的 RE映射方 式或均釆用下行解调参考信号的 RE映射方式。 在本场景中, 由 LPN决定同一时频资源上传输的上、 下行信号釆用何种 解调参考信号 RE映射方式。当上行信号和下行信号均釆用下行解调参考信号 的 RE映射方式时, 由于 UE默认釆用上行解调参考信号的 RE映射方式发送 上行信号, 因此, 在接收通信信号之前, LPN还需要通知 UE执行上行 RE映 射转下行 RE映射处理。 相应的, 在发送上行信号之前, UE 所执行的传输方法则还可包括: (根 据信号接收方的通知)执行上行 RE映射转下行 RE映射处理, 以令接收方接 收到的通信信号中, 上行解调参考信号的 RE位置与下行解调参考信号的 RE 位置相同。 更具体的, 上述上行 RE映射转下行 RE映射处理包括: 在默认的传输下 行解调参考信号的 RE上, 传输上行解调参考信号 (在 LTE中, 基站和 UE 都知道默认的上行解调参考信号的 RE 映射位置和默认的下行解调参考信号 的 RE映射位置)。 前已说明, 如果两个解调参考信号在相同的 RE上, 需要为两个解调参考 信号分配不同的正交序列, 以保证二者码分正交, 因此, 上述上行解调参考 信号还要釆用新正交序列, 并且, 其釆用的 (新)正交序列与下行解调参考 信号的正交序列码分正交。而 eNB的下行 RS解调信号的 RE映射位置和正交 序列则不需要做调整或更新。 如此一来, 上、 下行信号均可按照图 12的映射 方式发送。 而当上行信号和下行信号均釆用上行解调参考信号的 RE映射方式时,由 于基站默认釆用下行解调参考信号的 RE映射方式发送下行信号, 因此, 在接 收通信信号之前, LPN还需要通知基站执行下行 RE映射转上行 RE映射处理。 而相应的, 在发送下行信号之前, 基站所执行的传输方法还可包括: (根 据信号接收方的通知 )执行下行 RE映射转上行 RE映射处理, 以令信号接收 方接收到的通信信号中,下行解调参考信号的 RE位置与上行解调参考信号的 RE位置相同。 更具体的, 下行 RE映射转上行 RE映射处理包括: 在默认的传输上行解 调参考信号的 RE上,传输下行解调参考信号, 并且该下行解调参考信号釆用 的(新)正交序列与上述上行解调参考信号的正交序列码分正交。 而 UE的上 行 RS解调信号的 RE映射位置以及正交序列则不需要做调整或更新, 如此一 来, 上、 下行信号均可按照图 13的映射方式发送。 需要说明的是, 无论是基站还是 UE, 都存储有正交序列集合, 因此新正 交序列从正交序列集合中选取即可。 而如上行信号和下行信号釆用不同的解调参考信号映射方式, 则接收方 接收到的通信信号中,上行解调参考信号的 RE位置不同于下行解调参考信号 的 RE位置。 也即下行解调 RS信号的 RE映射位置与上行解调 RS信号的 RE 映射位置相错开。
由于在现有 LTE中, 上行解调 RS信号的 RE映射位置与下行解调 RS信 号的 RE映射位置本来就相错开, 因此, 可保持上行解调 RS信号默认的 RE 映射方式, 以及, 下行解调 RS信号默认的 RE映射方式不变。 也即, 基站发 送下行信号仍釆用默认的、 下行解调参考信号的 RE映射方式, UE发送上行 信号仍釆用默认的、 上行解调参考信号的 RE映射方式。 当然, 也可重新分配 上、 下行解调 RS信号的 RE映射位置, 并令其相错开, 在此不作赘述。 在釆用不同的解调参考信号映射方式时, 为令上、 下行解调 RS信号少受 干扰, LPN可执行如下操作:
通知 UE执行下行静默 /低功率处理; 通知基站执行上行静默 /低功率处理。 也即在发送上行信号之前, UE还需要(根据 LPN的通知)执行下行静 默 /低功率处理。
同理, 在发送下行信号之前, 基站还需要(根据 LPN的通知)执行上行 静默 /低功率处理。
这样一来, 信号接收方所接收到的通信信号中, 上行信号是经过下行静 默 /低功率处理的, 下行信号是经过上行静默 /低功率处理的。
更具体的, 上述下行静默 /低功率处理可包括: 在传输下行解调参考信号 的 RE上保持静默或低功率发射。 上述上行静默 /低功率处理可包括: 在传输上行解调参考信号的 RE上保 持静默或低功率发射。
图 14示出了本实施例基站侧的下行解调参考信号的映射位置, 可见, 在 上行解调 RS信号对应的 RE位置上, 不发送 PDSCH (下行数据信号), 保持 静默。
为方便起见, 可将上行 RE映射转下行 RE映射处理、 下行 RE映射转上 行 RE映射处理、 下行静默 /低功率处理、 上行静默 /低功率处理统称为 RE映 射处理。 而将连续 /非连续频语搬移、 非连续 /连续频谱搬移统称为频语搬移。
需要说明的是, 前述提及了 LPN通知 UE或 eNB执行频谱搬移, 在本场 景中 , LPN可在通知 UE或 eNB执行频谱搬移的同时, 通知 UE或 eNB执行 RE映射处理, 或者, 也可分两个步骤通知。 相应的, 当上行信号发送方或下行信号发送方既需要执行频谱搬移, 又 需要执行 RE映射处理时, 可以在执行频语搬移的同时, 执行 RE映射处理, 也可先执行频语搬移再执行 RE映射处理, 或者先执行 RE映射处理, 再执行 频谱搬移。
还需要说明的是, 载波映射方式、 解调参考信号映射方式的调整, 并不 会影响上、 下行信号的调制方式, 上行信号的调制方式仍为默认的调制方式, 同理, 下行信号的调制方式亦仍为默认的调制方式。
下面将介绍干 4尤删除( interference cancellation , IC )。 传统的 IC处理是以接收到的两路信号釆用相同的调制方式为前提, 未考 虑接收端同时接收上、 下行信号的情况。 在引入新通信技术后, 同一时频资 源上, 上、 下行信号将共存, 而上、 下行信号的调制方式、 多址方式可能不 相同, 这就需要对 IC进行优化。
参见图 15 , 在本发明实施例中, 上述干扰删除可包括如下步骤:
521、 对上述通信信号进行离散傅里叶变换(DTF ), 得到频域混合接收 信号;
522、 从上述频域混合接收信号中分离出上行解调参考信号、 下行解调参 考信号, 以及包含上行数据信号和下行数据信号的第一数据信号;
信号接收方可根据预先获取的上、 下行信号的解调参考信息, 分离出上 行解调参考信号、 下行解调参考信号, 以及包含上行数据信号和下行数据信 号的第一数据信号。
上述解调参考信息包括上、 下行解调参考信号的 RE位置。 更具体的, 分 离第一数据信号的方式可包括:
如上行信号发送方和下行信号发送方均釆用上行解调参考信号的 RE 映 射方式, 则上、 下行解调参考信号的 RE位置相同, 分离数据时, 请参见图 13 , 仅需去掉上行解调参考信号 RE位置处的信号, 即可分离出第一数据。 同 理, 如均釆用下行解调参考信号的 RE映射方式, 分离数据时, 请参见图 12, 去掉下行解调参考信号 RE位置处的信号, 即可分离出第一数据。
而如果, 接收的上下行解调 RS信号釆用错开方式, 则去掉上、 下解调参 考信号 RE位置处的信号, 可分离出第一数据。
523、 根据上行信号或下行信号的调制方式, 对第一数据信号进行解调, 得到干扰信号估计值;
524、 从第一数据信号中删除上述干扰信号估计值(将第一数据信号与干 扰信号估计值相减), 获取第二数据信号;
525、 对第二数据信号进行解调, 得到数据比特(有用信号)。 其中, 在不同情况下, 上述上行数据信号可为干扰信号, 上述下行数据 信号可为有用信号, 或者, 下行数据信号可为干扰信号, 而上行数据信号可 为有用信号。 更具体的, 请参见图 16, 当上述干扰信号为上行数据信号, 上述有用信 号为下行数据信号时, 上述步骤 S23可包括:
5231、 根据分离出的上行解调参考信号进行信道估计(信道估计 1 ), 得 到第一信道估计值 H— a〜; 如何进行信道估计是现有技术, 在此不作赘述。
5232、 根据分离出的上行解调参考信号和第一数据信号进行信道均衡, 得到第一均衡结果; 如何进行信道均衡是现有技术, 在此不作赘述。
5233、 对上述第一均衡结果进行离散傅里叶逆变换(IDFT ); 如何进行 IDFT 是现有技术, 在此不作赘述。 需要说明的是, 对应 SC-FDMA方式的信号在解调前, 需要进行 IDFT, 而对应 OFDMA方式的信 号在解调前不需要进行 IDFT。
S234、根据上行信号的调制方式,对经 IDFT后的第一均衡结果进行解调, 得到上行调制信号估计值 M— a~ (上行解调); 需要说明的是, 信号接收方可以根据接收的是上行信号还是下行信号判 断得出信号的多址方式, 以及是否使用 IDFT。 而调制方式是通过信令在发送 方和接丈方间通^!的。 如何解调是现有技术, 在此不作赘述。
S235、 将上述上行调制信号估计值与上述第一信道估计值相乘, 得到上 述干扰信号估计值。 相应的, 步骤 S25 (对第二数据信号进行解调)可包括:
S251、 根据分离出的下行解调参考信号进行信道估计(信道估计 2 ), 得 到第二信道估计值 H—b〜; 因为上、 下行信号的解调参考信号正交, 因此, 可以准确地估计出第一 信道估计值 H— a〜及第二信道估计值 H— b~。
5252、 根据分离出的下行解调参考信号和第二数据信号进行信道均衡, 得到第二均衡结果;
5253、 根据下行信号的调制方式, 对第二均衡结果进行解调, 得到下行 调制信号估计值 M— b~ (下行解调);
5254、 对上述下行调制信号估计值进行信道解码, 得到数据比特(数据 比特 2 )。
需要说明的是, 因为下行信号釆用的是 OFDMA多址方式, 因此在解调 前不需进行 IDFT。 为方便起见, 可将在干扰信号为上行数据信号, 有用信号为下行数据信 号时进行的干扰删除, 称为第一干扰删除。 而当干扰信号为下行数据信号, 有用信号为上行数据信号时, 请参见图 17 , 上述步骤 S23可包括:
S231 '、 根据下行解调参考信号进行信道估计(信道估计 2 ), 得到 H— b~ (第二信道估计值);
S232' 、 根据分离出的下行解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结果;
S233'、 根据下行信号的调制方式, 对上述第二均衡结果进行解调, 得到 下行调制信号估计值 M— b〜; 需要说明的是, 因为干扰信号 (下行数据信号)釆用的是 OFDMA多址 方式, 因此在解调过程中不需进行 IDFT。
S234'、 将上述下行调制信号估计值与上述第二信道估计值相乘, 得到上 述干扰信号估计值。
相应的, 步骤 S25 (对第二数据信号进行解调)可包括:
S251 '、 根据分离出的上行解调参考信号进行信道估计(信道估计 1 ), 得 到 H— a~ (第一信道估计值);
S252'、 根据分离出的上行解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结果;
S253,、 对上述第一均衡结果进行 IDFT;
S254'、 根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解 调, 得到上行调制信号估计值 M— a~;
S255'、 对上述上行调制信号估计值进行信道解码, 得到数据比特(数据 比特 1 )。 为方便起见, 可将在干扰信号为下行数据信号, 有用信号为上行数据信 号时进行的干扰删除称为第二干扰删除。
下面将介绍第二种场景。 仍请参见图 5, 在第二种场景中, LPN釆用 MU - MIMO ( Multiple-User Multiple Input Multiple Output, 多用户多输入多输出) 技术, 同时向 UE和 eNB发送数据(LPN的角色可为中继或基站)。 因此, 在 本场景中, LPN同时作为上行信号发送方和下行信号发送方。 由于多径传输等原因, UE除可接收到下行信号外,还可接收到上行信号。 同理, eNB除可接收到上行信号外, 还可接收到下行信号。 也即, UE和 eNB 均为信号接收方。
在本场景中, 上述第一多址方式亦为 SC-FDMA, 上述第二多址方式亦为 OFDMA。 与第一种场景相类似, 为进行载波映射方面的优化, 可令在同一时频资 源上传输的上、 下行信号均釆用下行载波映射方式或均釆用上行载波映射方 式。 由于是 LPN同时作为上、 下行信号的发送方, 因此, 如均釆用下行载波 映射方式, 在发送上行信号之前, LPN需要进行连续 /非连续频语搬移。 此外, 由于 eNB默认以上行载波映射方式接收上行信号, 因此, 当均釆 用下行载波映射方式时, 在发送上行信号之前, LPN还需要通知 eNB, 在下 行载波映射方式对应的频点上接收。 相应的, 对于 eNB而言, 其作为信号接收方所执行的 "接收通信信号"则 可具体包括: (根据 LPN的通知 )在下行载波映射方式对应的频点上接收通信 信号。 而如均釆上行载波映射方式, 则在发送下行信号之前, LPN需要进行非 连续 /连续频语搬移。
此外, 由于 UE默认以下行载波映射方式接收下行信号, 因此, 当均釆用 上行载波映射方式时, 在发送下行信号之前, LPN还需要通知上述 UE, 在上 行载波映射方式对应的频点上接收。 相应的, 对于 UE而言, 其作为信号接收方所执行的 "接收通信信号"则可 具体包括: (根据 LPN的通知 )在上行载波映射方式对应的频点上接收通信信 号。
连续 /非连续频语搬移、 非连续 /连续频语搬移的相关内容, 请参见本文前 述记载, 在此不作赘述。 与第一种场景相类似, 第二种场景需要优化的情景之二在于解调参考信 号映射方式。 与前述相类似, 可令在同一时频资源上传输的上、 下行信号均釆用上行 解调参考信号的 RE映射方式或均釆用下行解调参考信号的 RE映射方式。 当上行信号和下行信号均釆用下行解调参考信号的 RE映射方式时,在发 送上行信号之前, LPN所执行的传输方法还可包括: 执行上行 RE映射转下 行 RE映射处理。 而当上行信号和下行信号均釆用上行解调参考信号的 RE映射方式时,在 发送下行信号之前, LPN所执行的传输方法还可包括: 执行下行 RE映射转 上行 RE映射处理。 上行 RE映射转下行 RE映射处理, 以及, 下行 RE映射转上行 RE映射 处理的具体内容可参见本文前述记载, 在此不作赘述。 或者, 也可保持下行解调 RS信号的 RE映射位置与上行解调 RS信号的 RE映射位置相错开。 此时, LPN在发送上下行信号之前, 还需要执行上行静 默 /低功率处理, 以及, 下行静默 /低功率处理。
为了更有利于后续的干扰删除, LPN还可通知 eNB执行下行静默 /低功率 处理(在 UE传输下行解调参考信号的 RE上保持静默或低功率发射 ), 并通 知 UE执行上行静默 /低功率处理 (在 eNB传输上行解调参考信号的 RE上保 持静默或低功率发射)。 上行静默 /低功率处理和下行静默 /低功率处理的具体内容可参见本文前 述记载, 在此不作赘述。 此外, 在第二种场景中,还需要优化干扰删除。 由于在本场景中,是 LPN 同时发送上行信号和下行信号, 因此, LPN需要通知 UE及基站, 解调参考 信息(上、 下行解调参考信号的 RE位置)和上、 下行信号的调制方式, 以便 UE和基站在干扰删除时使用。 而 UE或基站, 可以根据接收的是上行信号还 是下行信号判断得出信号的多址方式, 以及是否使用 IDFT。
对于 eNB而言, 其干扰信号为下行数据信号, 其有用信号为上行数据信 号, 因此, 需要进行前述的第二干扰删除。
而对于 UE而言,其干扰信号为上行数据信号,其有用信号为下行数据信 号, 因此, 需要进行前述的第一干扰删除。
第一干扰删除和第二干扰删除的相关内容可参见本文前述记载, 在此不 作赘述。
下面将介绍第三种场景。 仍请参见图 6, 在本场景中, 基站(eNB )作为 下行信号发送方, UE1或 LPN1 ( UE1/LPN1 )作为上行信号发送方, 与此同 时, eNB 和 UE2/LPN2均作为信号接收方。 在本场景中, 上述第一多址方式 亦为 SC-FDMA, 上述第二多址方式亦为 OFDMA。 与前述两种场景相类似, 为进行载波映射方面的优化, 可令在同一时频 资源上传输的上、 下行信号均釆用下行载波映射方式或上行载波映射方式。 在本场景中, 由 eNB决定同一时频资源上传输的上、 下行信号釆用何种 载波映射方式, 当均釆用下行载波映射方式时, 由于 UE1/LPN1 默认釆用上 行载波映射方式发送上行信号, 因此, 在接收通信信号之前, eNB还需要通 知 UE1/LPN1执行连续 /非连续频谱搬移。 对于 UE1/LPN1 而言, 其在发送上行信号之前, 则还需要根据通知, 进 行连续 /非连续频谱搬移。 连续 /非连续频谱搬移的相关内容请参见本文前述记 载, 在此不作赘述。 而当均釆用上行载波映射方式时, 作为下行信号发送方的 eNB, 在发送 下行信号之前, 还需要对下行信号执行非连续 /连续频语搬移。 非连续 /连续频 语搬移的相关内容请参见本文前述记载, 在此不作赘述。 而由于 UE2/LPN2 默认以下行载波映射方式接收下行信号, 因此, eNB 在发送下行信号前, 还需要通知 UE2/LPN2在上行载波映射方式对应的频点 上接收信号。 对于 UE2/LPN2而言, 其所执行的"接收通信信号 "则可具体包括: (根据 eNB的通知)在上行载波映射方式对应的频点上接收通信信号。 与前述两场景相类似, 第三种场景需要优化的情景之二在于解调参考信 号映射方式。 与前述相类似, 可令在同一时频资源上传输的上、 下行信号均釆用上行 解调参考信号的 RE映射方式或均釆用下行解调参考信号的 RE映射方式。 当上行信号和下行信号均釆用下行解调参考信号的 RE映射方式时,由于 UE1/LPN1 默认釆用上行解调参考信号的 RE 映射方式发送上行解调参考信 号, 在接收信号之前, eNB还需要通知 UE1/LPN1执行上行 RE映射转下行 RE映射处理。 因此,在发送下行信号之前, UE1/LPN1所执行的传输方法还可包括:(根 据 eNB的通知)执行下行 RE映射转上行 RE映射处理。
不作赘述。 而当上行信号和下行信号均釆用上行解调参考信号的 RE 映射方式时, eNB还需要执行下行 RE映射转上行 RE映射处理。 下行 RE映射转上行 RE 映射的具体内容可参见本文前述记载, 在此不作赘述。 或者, 也可保持下行解调 RS信号的 RE映射位置与上行解调 RS信号的 RE映射位置相错开。此时, eNB还可通知 UE1 LPN1执行下行静默 /低功率处 理 (在传输下行解调参考信号的 RE上保持静默或低功率发射)。 而 eNB则执 行上行静默 /低功率处理(在传输上行解调参考信号的 RE上保持静默或低功 率发射)。 而为了更有利于后续的干扰删除, eNB还可通知 UE2/LPN2也执行上行 静默 /低功率处理。 此外, 在第三种场景中, 还可优化干扰删除。 由于在本场景中, eNB 和 UE2/LPN2都需要进行信号解调, 因此, eNB还需要通知 UE2/LPN2, 解调参 考信息(上、 下行解调参考信号的 RE位置)和调制方式, 以便 UE2/LPN2在 干扰删除时使用。 而 eNB或 UE2/LPN2, 可以根据接收的是上行信号还是下 行信号判断得出信号的多址方式, 以及是否使用 IDFT。 需要说明的是, 对于 eNB而言, 其干扰信号为下行数据信号, 其有用信 号为上行数据信号, 因此, 需要进行前述的第二干扰删除。 而对于 UE2/LPN2 而言, 其干扰信号为上行数据信号, 其有用信号为下行数据信号, 因此, 需 要进行前述的第一干扰删除。 第一干扰删除和第二干扰删除的相关内容可参 见本文前述记载, 在此不作赘述。
下面将介绍第四种场景。 仍请参见图 7, 在第四种场景中, 涉及第一基站 ( eNBl ), 第二基站(eNB2 ), eNBl下的 UE1/LPN1 (第一 UE/第一 LPN ), 以及 eNB2下的 UE2/LPN2 ( (第二 UE/第二 LPN ) )。 需要说明的是, 第一、 第二仅为了区分。 由图 7可知, 信号接收方包括 eNBl和 eNB2下的 UE2/LPN2, 下行信号 发送方包括 eNB2 , 上行信号发送方则包括 UE1/LPN1。 在本实施例中, 在发送信号或接收信号之前, eNBl 和 eNB2还需要协 商确定载波映射方式和解调参考信号映射方式。 与前述三种场景相类似, 为进行载波映射方面的优化, 可令在同一时频 资源上传输的上、 下行信号均釆用下行载波映射方式或上行载波映射方式。 当均釆用下行载波映射方式时, 由于 UE1/LPN1 默认釆用上行载波映射 方式发送上行信号, 因此, 在接收通信信号之前, eNBl还需要根据协商确定 的载波映射方式, 通知 UE1/LPN1对上行信号执行连续 /非连续频语搬移。 因此, 对于 UE1/LPN1 而言, 在发送上行信号之前, 还需要根据 eNBl 的通知, 对上行信号执行连续 /非连续频语搬移。 连续 /非连续频语搬移的相关 内容请参见本文前述记载, 在此不作赘述。 而 eNBl所执行的"接收通信信号 "则可具体包括:在下行载波映射方式对 应的频点上接收通信信号。 而当均釆用上行载波映射方式时, 在发送下行信号之前, eNB2还需要根 据协商确定的载波映射方式, 对下行信号执行非连续 /连续频谱搬移。 非连续 / 连续频语搬移的相关内容请参见本文前述记载, 在此不作赘述。 此外, 由于 UE2/LPN2 默认以下行载波映射方式接收下行信号, 因此, 在发送下行信号前, eNB2 还需要根据协商确定的载波映射方式, 通知 UE2/LPN2在上行载波映射方式对应的频点上接收通信信号。 对于 UE2/LPN2而言, 其所执行的"接收通信信号 "则可具体包括: (根据 eNB2的通知)在上行载波映射方式对应的频点上接收通信信号。 非连续 /连续频语搬移的相关内容请参见本文前述记载, 在此不作赘述。 与前述三场景相类似, 第四种场景需要优化的情景之二在于解调参考信 号映射方式。 为进行优化, 可令在同一时频资源上传输的上、 下行信号均釆用上行解 调参考信号的 RE映射方式或均釆用下行解调参考信号的 RE映射方式。 当上行信号和下行信号均釆用下行解调参考信号的 RE映射方式时,在接 收信号之前, eNBl 还需要根据协商确定的解调参考信号映射方式, 通知 UE1/LPN1执行上行 RE映射转下行 RE映射处理。 对于 UE1/LPN1而言, 在发送下行信号之前, UE1/LPN1所执行的传输方 法还可包括: 根据 eNBl的通知, 执行上行 RE映射转下行 RE映射处理。 而当上行信号和下行信号均釆用上行解调参考信号的 RE 映射方式时, eNB2还需要根据协商确定的解调参考信号映射方式, 执行下行 RE映射转上 行 RE映射处理。 或者, 也可保持下行解调 RS信号的 RE映射位置与上行解调 RS信号的 RE映射位置相错开。 此时, eNBl还可根据协商确定的解调参考信号映射方式,通知 UE1/LPN1 执行下行静默 /低功率处理; eNB2则可根据协商确定的解调参考信号映射方式 执行上行静默 /低功率处理(在传输上行解调参考信号的 RE上保持静默或低 功率发射)。 而为了更有利于后续的干扰删除, eNB2还可通知 UE2/LPN2也执行上行 静默 /低功率处理。 上行 RE映射转下行 RE映射处理、 下行 RE映射转上行 RE映射处理、 上行静默 /低功率处理、 下行静默 /低功率处理的具体内容可参见本文前述记 载, 在此不作赘述。 在第四种场景中, 还可优化干扰删除。 由于在本场景中, eNBl 和 UE2/LPN2都需要进行信号解调, 因此, eNB2需要通知 UE2/LPN2, 解调参 考信息(上、 下行解调参考信号的 RE位置)和调制方式, 以便 UE2/LPN2在 干扰删除时使用。 而 eNBl或 UE2/LPN2, 可以根据接收的是上行信号还是下 行信号判断得出信号的多址方式, 以及是否使用 IDFT。 需要说明的是, 对于 eNBl而言, 其干扰信号为下行数据信号, 其有用信 号为上行数据信号, 因此, 需要进行前述的第二干扰删除。 而对于 UE2/LPN2 而言, 其干扰信号为上行数据信号, 其有用信号为下行数据信号, 因此, 需 要进行前述的第一干扰删除。 第一干扰删除和第二干扰删除的相关内容可参 见本文前述记载, 在此不作赘述。
与上述传输方法相对应, 本发明实施例还提供传输装置。 在作为信号接收方时, 请参见图 18, 传输装置 190可包括: 接收单元 1 , 用于接收通信信号。 其中, 通信信号包括在同一时频资源上 传输的上行信号和下行信号; 上行信号和下行信号至少釆用相同的载波映射 方式。 上行号对应第一多址方式, 下行信号对应第二多址方式。 干扰删除单元(IC单元) 2, 用于根据第一多址方式和第二多址方式, 对 通信信号进行干扰删除。
在作为上行信号发送方时, 请参见图 19, 传输装置 200可包括: 上行发送单元 3 , 用于发送上行信号。 该上行信号和在同一时频资源上传 输的下行信号至少釆用相同的载波映射方式。
而在作为上行信号发送方时, 请参见图 20, 传输装置 300可包括: 下行发送单元 4, 用于发送下行信号, 下行信号与在同一时频资源上传输 的上行信号釆用相同的载波映射方式。 当上述相同的载波映射方式为下行载波映射方式时, 在接收通信信号方 面, 上述接收单元 1 可具体用于: 在下行载波映射方式对应的频点上接收通 信信号。
而相应的,请参见图 21 ,作为上行信号发送方的传输装置 200还可包括: 连续 /非连续频语搬移单元 5, 用于在上行发送单元 3发送上行信号之前, 执行连续 /非连续频谱搬移, 以使上行信号的频点搬移至下行载波映射方式对 应的频点上。 而当相同的载波映射方式为上行载波映射方式时, 在接收通信信号方面, 上述接收单元 1 具体可用于: 在上行载波映射方式对应的频点上接收通信信 号。
相应的, 请参见图 22, 作为下行信号发送方的传输装置 300还可包括: 非连续 /连续频语搬移单元 6, 用于在下行发送单元 4发送下行信号之前, 进 行非连续 /连续频谱搬移, 以使下行信号的频点搬移至上行载波映射方式对应 的频点上。 非连续 /连续频语搬移, 以及, 连续 /非连续频语搬移的具体内容, 请参见 本文前述记载, 在此不作赘述。 需要说明的是: 根据前述介绍, 当均釆用下行载波映射方式时, 上行信 号方对应的传输装置还可包括第一通知单元, 用于在信号接收方发送上行信 号之前, 通知信号接收方在下行载波映射方式对应的频点上接收信号。 或者 反过来, 信号接收方还可包括第二通知单元, 用于在接收通信信号之前, 通 知上行信号发送方执行连续 /非连续频语搬移。 而当均釆用上行载波映射方式时, 下行信号发送方对应的传输装置还可 包括第三通知单元, 用于在发送下行信号之前, 通知信号接收方, 在上行载 波映射方式对应的频点上接收信号。 或者反过来, 信号接收方对应的传输装 置还可包括第四通知单元, 用于通知下行信号发送方在发送下行信号之前, 执行非连续 /连续频语搬移。 此外, 在第四场景中, 信号接收方 (eNBl )和下行信号发送方 (eNB2 ) 还可分别包括协商单元, 用于协商确定载波映射方式及解调参考信号映射方 式。 前已述及, 上述上行信号和下行信号可釆用相同的解调参考信号映射方 式。
当上行信号和下行信号均釆用下行解调参考信号的 RE映射方式时,上行 用于在上行发送单元发送上行信号之前, 执行上行 RE映射转下行 RE映射处 理。
而当上行信号和下行信号均釆用上行解调参考信号的 RE映射方式时,下 行信号发送方对应的传输装置 300还可包括下行 RE映射转上行 RE映射单元, 用于在下行发送单元发送下行信号之前, 执行下行 RE映射转上行 RE映射处 理处理。 或者, 上行信号和下行信号也可釆用不同的解调参考信号映射方式。 而釆用不同的解调参考信号映射方式时 (下行解调 RS信号的 RE映射位 置与上行解调 RS信号的 RE映射位置相错开), 上行信号发送方对应的传输 装置 200还可包括下行静默 /低功率单元,用于在发送单元发送上行信号之前, 执行下行静默 /低功率处理; 而下行信号发送方对应的传输装置 300还可包括 上行静默 /低功率单元, 用于在下行发送单元发送下行信号之前, 执行上行静 默 /低功率处理。 此外, 上行信号发送方对应的传输装置, 其可包括上行信号生成单元, 参见图 23 , 上行信号生成单元除包括常规的信道编码模块、 上行调制模块、 DTF模块、 IDFT模块外, 还包括连续 /非连续频语搬移模块(用于执行前述的 连续 /非连续频谱搬移)、 第一 RE映射处理模块 (用于执行上行 RE映射转下 行 RE映射处理或下行静默 /低功率处理 ), 连续 /非连续频语搬移模块。 相类似的, 下行信号发送方对应的传输装置, 其可包括下行信号生成单 元, 参见图 24, 下行信号生成单元除包括常规的信道编码模块、 下行调制模 块、 IDFT模块外, 还包括非连续 /连续频语搬移模块(用于执行前述的非连续 /连续频谱搬移), 以及, 第二 RE映射处理模块(用于执行下行 RE映射转上 行 RE映射或上行静默 /低功率处理)。 下面将介绍 IC单元 2。 参见图 25 , IC单元 2可包括:
DFT模块, 用于对通信信号进行离散傅里叶变换(DTF ), 得到频域混合 接收信号 (步骤 S21 ); 分离模块, 用于从频域混合接收信号中分离出上行解调参考信号、 下行 解调参考信号, 以及包含上行数据信号和下行数据信号的第一数据信号 (步 骤 S22 ); 第一信道估计模块, 用于根据分离出的上行解调参考信号进行信道估计, 得到第一信道估计值 H— a~ (步骤 S231 ) , 或者, 根据下行解调参考信号进行 信道估计, 得到干扰信号的信道估计值 H—b~ (步骤 S231' ); 第一信道均衡模块, 用于根据分离出的上行解调参考信号和第一数据信 号进行信道均衡, 得到第一均衡结果(步骤 S232 ), 或者, 根据分离出的下行 解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结果 (步骤
S232' ); 第一 IDFT模块, 用于对上述第一均衡结果进行 IDFT (步骤 S233 ); 第一解调模块, 用于根据上行信号的调制方式, 对经 IDFT后的上行调制 信号值进行解调, 得到上行调制信号估计值 M_a〜(步骤 S234 ), 或者, 根据 下行信号的调制方式, 对上述第二均衡结果进行解调, 得到下行调制信号估 计值 M_b~ (步骤 S233' ); 相乘模块, 用于将上述上行调制信号估计值与上述第一信道估计值相乘, 得到上述干扰信号估计值(步骤 S235 ), 或者, 将上述下行调制信号估计值与 上述第二信道估计值相乘, 得到上述干扰信号估计值(步骤 S234' ); 相减模块, 用于从第一数据信号中删除上述干扰信号估计值, 获取第二 数据信号 (步骤 S24 ); 第二信道估计模块, 用于根据分离出的下行解调参考信号进行信道估计, 得到第二信道估计值 H— b~ (步骤 S251 ) , 或者, 根据分离出的上行解调参考 信号进行信道估计, 得到第一信道估计值 H— a~ (步骤 S251' ); 第二信道均衡模块, 用于根据分离出的下行解调参考信号和第二数据信 号进行信道均衡, 得到第二均衡结果(步骤 S252 ), 或者, 根据分离出的上行 解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结果 (步骤
S252' ); 第二 IDFT模块, 用于对第一均衡结果进行 IDFT (步骤 S253,); 第二解调模块, 用于根据下行信号的调制方式, 对第二均衡结果进行解 调, 得到下行解调信号估计值 M— b~ (步骤 S253 )或者, 根据上行信号的调 制方式, 对经 IDFT后的第一均衡结果进行解调, 得到上行解调信号估计值 M_a~ (步骤 S254, ); 第二信道解码模块, 用于对输入的信号进行信道解码, 得到数据比特 1 (步骤 S254 ), 或者, 数据比特 2 (步骤 S255,)。
图 26给出了上述传输装置的一种硬件结构, 其可包括: 至少一个处理器 261 , 例如 CPU, 至少一个网络接口 264或者其他用户接口 263 , 存储器 265 , 至少一个通信总线 262。通信总线 262用于实现这些组件之间的连接通信。 该 传输定时装置 260可选的包含用户接口 263 , 键盘或者点击设备, 例如, 轨迹 球(trackball ) , 触感板或者触感显示屏。 存储器 265可能包含高速 RAM存 储器, 也可能还包括非不稳定的存储器 (non-volatile memory ), 例如至少一 个磁盘存储器。存储器 265可选的可以包含至少一个位于远离前述处理器 261 的存储装置。
在一些实施方式中, 存储器 265存储了如下的元素, 可执行模块或者数 据结构, 或者他们的子集, 或者他们的扩展集:
操作系统 2651 , 包含各种系统程序, 用于实现各种基础业务以及处理基 于硬件的任务;
应用程序模块 2652, 包含各种应用程序, 用于实现各种应用业务。
在作为信号接收方时, 应用程序模块 2652中包括但不限于接收单元 1和 IC单元 2。 应用程序模块 2652中各模块的具体实现请参见图 19所示实施例 中的相应模块, 在此不赘述。
在作为信号接收方中, 通过调用存储器 265存储的程序或指令, 处理器 261用于:
接收通信信号;
根据第一多址方式和第二多址方式, 对通信信号进行干扰删除。
此外, 处理器 261 亦可完成本文方法部分所介绍的信号接收方所执行的 其他步骤, 以及各步骤的细化, 在此不作赘述。
而在作为上行信号发送方时, 应用程序模块 2652中包括但不限于上行发 送单元 3。 应用程序模块 2652中各模块的具体实现请参见图 20或图 22所示 实施例中的相应模块, 在此不赘述。 通过调用存储器 265存储的程序或指令, 处理器 261用于: 发送上行信号。 该上行信号和在同一时频资源上传输的下行信号至少釆 用相同的载波映射方式。 此外, 上述处理器 261 亦可完成本文方法部分所介绍的上行信号发送方 可执行的其他步骤, 以及各步骤的细化, 在此不作赘述。
而在作为下行信号发送方时, 应用程序模块 2652中包括但不限于下行发 送单元 4。 应用程序模块 2652中各模块的具体实现请参见图 21或图 23所示 实施例中的相应模块, 在此不赘述。
通过调用存储器 265存储的程序或指令, 处理器 261用于: 发送下行信号, 下行信号与在同一时频资源上传输的上行信号釆用相同 的载波映射方式。 此外, 上述处理器 261 亦可完成本文方法部分所介绍的下行信号发送方 可执行的其他步骤, 以及各步骤的细化, 在此不作赘述。 本说明书中各个实施例釆用递进的方式描述, 每个实施例重点说明的都 是与其他实施例的不同之处, 各个实施例之间相同相似部分互相参见即可。 对于实施例提供的装置而言, 由于其与实施例提供的方法相对应, 所以描述 的比较简单, 相关之处参见方法部分说明即可。 还需要说明的是, 在本文中, 诸如第一和第二等之类的关系术语仅仅用 来将一个实体或者操作与另一个实体或操作区分开来, 而不一定要求或者暗 示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语"包括"、 "包含 "或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要 素的过程、 方法、 物品或者设备不仅包括那些要素, 而且还包括没有明确列 出的其他要素, 或者是还包括为这种过程、 方法、 物品或者设备所固有的要 素。 在没有更多限制的情况下, 由语句 "包括一个 ... ...,,限定的要素, 并不排除 在包括所述要素的过程、 方法、 物品或者设备中还存在另外的相同要素。 通过以上的实施方式的描述, 所属领域的技术人员可以清楚地了解到本 发明可借助软件加必需的通用硬件的方式来实现, 通用硬件包括通用集成电 路、 通用 CPU、 通用存储器、 通用元器件等, 当然也可以通过专用硬件包括 专用集成电路、 专用 CPU、 专用存储器、 专用元器件等来实现, 但很多情况 下前者是更佳的实施方式。 基于这样的理解, 本发明的技术方案本质上或者 说对现有技术做出贡献的部分可以以软件产品的形式体现出来, 该计算机软 件产品可以存储在可读取的存储介质中, 如 u盘、 移动存储介质、 只读存储 器 (ROM, Read-Only Memory ), 随机存取存储器 (RAM, Random Access Memory ), 磁碟或者光盘等各种可以存储软件程序代码的介质, 包括若干指 令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例的方法。 对所提供的实施例的上述说明, 使本领域专业技术人员能够实现或使用 本发明。 对这些实施例的多种修改对本领域的专业技术人员来说将是显而易 见的, 本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下, 在其它实施例中实现。 因此, 本发明将不会被限制于本文所示的这些实施例, 而是要符合与本文所提供的原理和新颖特点相一致的最宽的范围。

Claims

权利 要求
1、 一种传输方法, 其特征在于, 包括: 接收方接收通信信号, 所述通信信号包括在同一时频资源上传输的上行 信号和下行信号; 所述上行信号和下行信号釆用相同的载波映射方式, 所述 上行号对应第一多址方式, 所述下行信号对应第二多址方式; 接收方根据所述第一多址方式和所述第二多址方式, 对所述通信信号进 行干扰删除。
2、 如权利要求 1所述方法, 其特征在于, 所述相同的载波映射方式为下行载波映射方式; 所述接收通信信号包括: 在所述下行载波映射方式对应的频点上接收通 信信号; 或者, 所述相同的载波映射方式为上行载波映射方式; 所述接收通信信号包括: 在所述上行载波映射方式对应的频点上接收通 信信号。
3、 如权利要求 1所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号; 所述上行信号和下行信号釆用,所述下行解调参考信号的资源单元 RE映 射方式; 所接收到的通信信号中, 上行解调参考信号的 RE位置与下行解调参 考信号的 RE位置相同; 或者,
所述上行信号和下行信号釆用, 所述上行解调参考信号的 RE映射方式; 所接收到的通信信号中,下行解调参考信号的 RE位置与上行解调参考信号的 RE位置相同。
4、 如权利要求 1所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号;
所接收到的通信信号中,所述上行解调参考信号的 RE位置不同于所述下 行解调参考信号的 RE位置; 所接收到的通信信号中, 上行信号是经过下行静 默 /低功率处理的, 下行信号经过上行静默 /低功率处理的。
5、 如权利要求 3或 4所述的方法, 其特征在于, 所述干扰删除包括: 对所述通信信号进行离散傅里叶变换, 得到频域混合接收信号; 从所述频域混合接收信号中分离出上行解调参考信号、 下行解调参考信 号, 以及第一数据信号, 所述第一数据信号包含上行数据信号和下行数据信 号;
根据上行信号或下行信号的调制方式, 对第一数据信号进行解调, 得到 干扰信号估计值, 所述干扰信号为上行数据信号或下行数据信号; 从所述第一数据信号中删除所述干扰信号估计值, 获取第二数据信号; 对所述第二数据信号进行解调, 得到数据比特。
6、 如权利要求 5所述的方法, 其特征在于, 所述干扰信号为上行数据信号, 所述第一多址为单载波频分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA; 所述根据上行信号的调制方式, 对第一数据信号进行解调, 得到干扰信 号估计值包括:
根据上行解调参考信号进行信道估计 , 得到第一信道估计值;
根据上行解调参考信号和第一数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行离散傅里叶逆变换 IDFT, 所述 IDFT 与所述 SC-FDMA方式相对应; 根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值;
将所述上行调制信号估计值与所述第一信道估计值相乘, 得到所述干扰 信号估计值; 所述对第二数据信号进行解调包括: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第二数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对所述第二均衡结果进行解调, 得到下行调制 信号估计值; 对所述下行调制信号估计值进行信道解码, 得到数据比特。
7、 如权利要求 5所述的方法, 其特征在于, 所述干扰信号为下行数据信号, 所述第一多址为单载波频分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA; 所述根据下行信号的调制方式, 对第一数据信号进行解调, 得到干扰信 号估计值包括: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对将所述第二均衡结果进行解调, 得到下行调 制信号估计值;
将所述下行调制信号估计值与所述第二信道估计值相乘, 得到所述干扰 信号估计值; 所述对第二数据信号进行解调包括: 根据上行解调参考信号进行信道估计, 得到第一信道估计值; 根据上行解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行 IDFT, 所述 IDFT与所述 SC-FDMA方式相对 应;
根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值;
对所述上行调制信号估计值进行信道解码, 得到数据比特。
8、 一种传输方法, 其特征在于, 包括: 上行信号发送方发送上行信号, 所述上行信号和在同一时频资源上传输 的下行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所述 下行信号对应第二多址方式。
9、 如权利要求 8所述方法, 其特征在于, 当所述相同的载波映射方式为 下行载波映射方式时, 在发送上行信号之前, 所述方法还包括: 上行信号发送方进行连续 /非连续频语搬移, 以使所述上行信号的频点搬 移至所述下行载波映射方式对应的频点上。
10、 如权利要求 9所述的方法, 其特征在于, 所述连续 /非连续频语搬移 包括: 将上行信号的连续频谱, 从中心点向两侧各搬移半个子载波宽度, 得 到非连续频谱; 所述非连续频谱的中心空出一个子载波宽度。
11、 如权利要求 8所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号; 当所述上行信号和下行信号釆用, 所述下行解调参考信号的资源单元 RE 映射方式时, 在发送上行信号之前, 所述方法还包括:
上行信号发送方执行上行 RE映射转下行 RE映射处理, 以令信号接收方 接收到的通信信号中, 上行解调参考信号的 RE位置与下行解调参考信号的 RE位置相同。
12、 如权利要求 8所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号;
当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE 位置时, 在发送上行信号之前, 所述方法还包括: 上行信号发送方执行下行 静默 /低功率处理。
13、 如权利要求 12所述的方法, 其特征在于, 所述上行 RE映射转下行 RE映射处理包括: 在传输所述下行解调参考信号的 RE上, 传输上行解调参 考信号, 并且所述上行解调参考信号釆用的正交序列, 与所述下行解调参考 信号的正交序列码分正交。
14、 一种传输方法, 其特征在于, 包括: 下行信号的发送方发送下行信号, 所述下行信号与在同一时频资源上传 输的上行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所 述下行信号对应第二多址方式。
15、 如权利要求 14所述方法, 其特征在于, 当所述相同的载波映射方式 为上行载波映射方式时, 在发送下行信号之前, 所述方法还包括: 下行信号的发送方进行非连续 /连续频谱搬移, 以使所述下行信号的频点 搬移至所述上行载波映射方式对应的频点上。
16、 如权利要求 15所述的方法, 其特征在于, 所述非连续 /连续频语搬移 包括: 将下行信号的非连续频谱, 从两侧向中心点各搬移半个子载波宽度, 得到连续频谱; 所述非连续频谱的中心空出一个子载波宽度。
17、 如权利要求 14至 16任一项所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号; 当所述上行信号和下行信号釆用, 所述上行解调参考信号的资源单元 RE 映射方式时, 在发送下行信号之前, 所述方法还包括: 方接收到的通信信号中,下行解调参考信号的 RE位置与上行解调参考信号的 RE位置相同。
18、 如权利要求 14至 16任一项所述的方法, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号;
当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE 位置时, 在发送下行信号之前, 所述方法还包括:
下行信号的发送方执行上行静默 /低功率处理。
19、 如权利要求 17所述的方法, 其特征在于, 所述下行 RE映射转上行 RE映射处理包括: 在传输所述上行解调参考信 号的 RE上,传输下行解调参考信号, 并且所述下行解调参考信号釆用的正交 序列, 与所述上行解调参考信号的正交序列码分正交。
20、 一种传输装置, 其特征在于, 包括: 接收单元, 用于接收通信信号, 所述通信信号包括在同一时频资源上传 输的上行信号和下行信号; 所述上行信号和下行信号釆用相同的载波映射方 式; 所述上行号对应第一多址方式, 所述下行信号对应第二多址方式; 干扰删除单元, 用于根据所述第一多址方式和所述第二多址方式, 对所 述通信信号进行干扰删除。
21、 如权利要求 20所述装置, 其特征在于, 当所述相同的载波映射方式为下行载波映射方式时, 在接收通信信号方 面, 所述接收单元具体用于: 在所述下行载波映射方式对应的频点上接收通 信信号; 或者,
当所述相同的载波映射方式为上行载波映射方式时, 在接收通信信号方 面, 所述接收单元具体用于: 在所述上行载波映射方式对应的频点上接收通 信信号。
22、 如权利要求 20所述的装置, 其特征在于, 在干扰删除方面, 所述干 扰删除单元具体用于:
对所述通信信号进行离散傅里叶变换, 得到频域混合接收信号; 从所述频域混合接收信号中分离出上行解调参考信号、 下行解调参考信 号, 以及第一数据信号, 所述第一数据信号包含上行数据信号和下行数据信 号;
根据上行信号或下行信号的调制方式, 对第一数据信号进行解调, 得到 干扰信号估计值, 所述干扰信号为上行数据信号或下行数据信号; 从第一数据信号中删除所述干扰信号估计值, 获取第二数据信号; 对第二数据信号进行解调, 得到数据比特。
23、 如权利要求 22所述的装置, 其特征在于, 所述第一多址为单载波频 分多址 SC-FDMA, 所述第二多址为正交频分多址 OFDMA;
当所述干扰信号为上行数据信号时, 在根据上行信号的调制方式, 对第 一数据信号进行解调, 得到干扰信号估计值方面, 所述干扰删除单元具体用 于:
根据上行解调参考信号进行信道估计 , 得到第一信道估计值;
根据上行解调参考信号和第一数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行离散傅里叶逆变换 IDFT, 所述 IDFT 与所述 SC-FDMA方式相对应;
根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值; 将所述上行调制信号估计值与所述第一信道估计值相乘, 得到所述干扰 信号估计值;
在对第二数据信号进行解调方面, 所述干扰删除单元具体用于: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第二数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对所述第二均衡结果进行解调, 得到下行调制 信号估计值; 对所述下行调制信号估计值进行信道解码, 得到数据比特; 或者,
当所述干扰信号为下行数据信号时 , 在根据下行信号的调制方式, 对第一数据信号进行解调, 得到干扰信号 估计值方面, 所述干扰删除单元具体用于: 根据下行解调参考信号进行信道估计 , 得到第二信道估计值; 根据下行解调参考信号和第一数据信号进行信道均衡, 得到第二均衡结 果;
根据下行信号的调制方式对将所述第二均衡结果进行解调, 得到下行调 制信号估计值; 将所述下行调制信号估计值与所述第二信道估计值相乘, 得到所述干扰 信号估计值;
在对第二数据信号进行解调方面, 所述干扰删除单元具体用于: 根据上行解调参考信号进行信道估计 , 得到第一信道估计值; 根据上行解调参考信号和第二数据信号进行信道均衡, 得到第一均衡结 果;
对所述第一均衡结果进行 IDFT, 所述 IDFT与所述 SC-FDMA方式相对 应;
根据上行信号的调制方式, 对经 IDFT后的第一均衡结果进行解调, 得到 上行调制信号估计值;
对所述上行调制信号估计值进行信道解码, 得到数据比特。
24、 一种传输装置, 其特征在于, 包括: 上行发送单元, 用于发送上行信号, 所述上行信号和在同一时频资源上 传输的下行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所述下行信号对应第二多址方式。
25、 如权利要求 24所述装置, 其特征在于, 当所述相同的载波映射方式 为下行载波映射方式时, 所述装置还包括: 连续 /非连续频语搬移单元,用于在所述上行发送单元发送上行信号之前, 执行连续 /非连续频谱搬移, 以使所述上行信号的频点搬移至所述下行载波映 射方式对应的频点上。
26、 如权利要求 24或 25所述的装置, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号; 当所述上行信号和下行信号釆用, 所述下行解调参考信号的资源单元 RE 映射方式时, 所述装置还包括上行 RE映射转下行 RE映射单元, 用于在所述 上行发送单元发送上行信号之前, 执行上行 RE映射转下行 RE映射处理, 以 令信号接收方接收到的通信信号中,上行解调参考信号的 RE位置与下行解调 参考信号的 RE位置相同。
27、 如权利要求 24或 25所述的装置, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号;
当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE 位置时, 所述装置还包括下行静默 /低功率单元, 用于在所述发送单元发送上 行信号之前, 执行下行静默 /低功率处理。
28、 一种传输装置, 其特征在于, 包括: 下行发送单元, 用于发送下行信号, 所述下行信号与在同一时频资源上 传输的上行信号釆用相同的载波映射方式, 所述上行号对应第一多址方式, 所述下行信号对应第二多址方式。
29、 如权利要求 28所述装置, 其特征在于, 当所述相同的载波映射方式 为上行载波映射方式时, 所述装置还包括非连续 /连续频语搬移单元, 用于在 所述下行发送单元发送下行信号之前, 进行非连续 /连续频语搬移, 以使所述 下行信号的频点搬移至所述上行载波映射方式对应的频点上。
30、 如权利要求 28或 29所述的装置, 其特征在于, 所述上行信号包括上行解调参考信号和上行数据信号; 所述下行信号包 括下行解调参考信号和下行数据信号;
当所述上行信号和下行信号釆用, 所述上行解调参考信号的资源单元 RE 映射方式时, 所述装置还包括下行 RE映射转上行 RE映射单元, 用于在所述 下行发送单元发送下行信号之前, 执行下行 RE映射转上行 RE映射处理, 以 令信号接收方接收到的通信信号中,下行解调参考信号的 RE位置与上行解调 参考信号的 RE位置相同。
31、 如权利要求 28或 29所述的装置, 其特征在于, 所述上行信号包括 上行解调参考信号和上行数据信号; 所述下行信号包括下行解调参考信号和 下行数据信号;
当所述上行解调参考信号的 RE位置不同于所述下行解调参考信号的 RE 位置时, 所述装置还包括上行静默 /低功率单元, 用于在所述下行发送单元发 送下行信号之前, 执行上行静默 /低功率处理。
PCT/CN2014/082694 2013-11-12 2014-07-22 传输方法及装置 Ceased WO2015070635A1 (zh)

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