WO2018024127A1 - Procédé d'émission de signaux et dispositif de réseau - Google Patents

Procédé d'émission de signaux et dispositif de réseau Download PDF

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Publication number
WO2018024127A1
WO2018024127A1 PCT/CN2017/094107 CN2017094107W WO2018024127A1 WO 2018024127 A1 WO2018024127 A1 WO 2018024127A1 CN 2017094107 W CN2017094107 W CN 2017094107W WO 2018024127 A1 WO2018024127 A1 WO 2018024127A1
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Prior art keywords
sequence
network device
signal
subcarriers
subcarrier
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English (en)
Chinese (zh)
Inventor
曲秉玉
刘建琴
周永行
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority claimed from CN201611229827.5A external-priority patent/CN107666455B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2018024127A1 publication Critical patent/WO2018024127A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a method and a network device for transmitting signals.
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • Applying the high frequency band technology to multiple antennas can greatly reduce the size of the multi-antenna configuration, thereby facilitating the acquisition of the site and the deployment of more antennas.
  • the high frequency band will lead to greater path loss, especially the influence of factors such as the atmosphere and vegetation, which further aggravate the loss of wireless propagation.
  • Orthogonal Frequency Division Multiplexing exhibits strong anti-multipath interference capability, simple discrete Fourier transform implementation, and multi-antenna Transmission technology and other features, and is widely used in downlink signal transmission in LTE systems.
  • the uplink signal transmission in the LTE system may employ a Discrete Fourier Transform Spread OFDM (DFT-S-OFDM) technology.
  • DFT-S-OFDM technology can achieve Peak to Average Power Ratio (PAPR) performance similar to single carrier signals. Low PAPR can reduce the complexity and cost of hardware implementation.
  • PAPR Peak to Average Power Ratio
  • DFT-S-OFDM can implement orthogonal frequency division multiple access, thereby obtaining a single carrier orthogonal frequency division multiple access scheme. Therefore, DFT-S-OFDM technology is particularly suitable. Uplink transmission for mobile communication systems.
  • the single carrier transmission defined in the current LTE system refers to conforming to the single carrier characteristic in the time domain, so that a lower PAPR can be obtained.
  • In the frequency domain it can still be implemented by centralized single carrier transmission or distributed single carrier transmission.
  • centralized single-carrier transmission one type of transmission signal (data signal or reference signal) of a user occupies a continuous spectrum in the frequency domain (ie, frequency domain subcarriers are arranged together), and the occupied spectrum is the entire system bandwidth. portion.
  • a transmission signal (data signal or reference signal) of one user occupies a discontinuous spectrum in the frequency domain.
  • a data signal and a reference signal (such as a Demodulation Reference Signal (DMRS)) similar to a single carrier signal.
  • DMRS Demodulation Reference Signal
  • the plurality of subcarriers in the last symbol may be divided into two subcarrier groups that do not overlap each other to respectively transmit the uplink data signal and the uplink reference signal.
  • a plurality of subcarriers are frequency-divided into two comb teeth, comb 1 is used for transmission of an uplink data signal, and comb 2 is used for transmission of an uplink reference signal.
  • the above solution can realize the simultaneous transmission of the data signal and the reference signal, and can reduce the interference between the two signals by performing frequency division orthogonal transmission on the two signals to be transmitted.
  • a plurality of subcarriers are divided into two comb teeth to simultaneously transmit data signals and reference signals, single carrier characteristics are destroyed when transmitted on the same antenna, resulting in higher PAPR.
  • the prior art can also employ a method of multiplexing with two time domain signals.
  • the first time domain signal sequence is a 0 , a 1 , ..., a N-1 , denoted as ⁇ a i ⁇
  • the second time domain signal sequence is b 0 , b 1 , ..., b N-1 , denoted as ⁇ b i ⁇ .
  • the time division multiplexing of the two time domain signal sequences is performed before the Discrete Fourier Transform (DFT) to form the time domain signal sequences a 0 , a 1 , . . . , a N-1 , b 0 , b 1 , ...,b N-1 .
  • DFT Discrete Fourier Transform
  • the first time domain signal sequence and the second time domain signal sequence are both low PAPR sequences (for example, when the two time domain signal sequences are time domain waveforms in the form of DFT-S-OFDM or other low PAPR single carriers)
  • the domain waveform the above operation can ensure that the time-domain multiplexed time domain signal sequence is still a low PAPR sequence.
  • this scheme will cause two-way transmission signals to have inter-signal interference due to multi-transition effects after passing through the channel, and the interference between them is large.
  • the two signals are subjected to different spatial domain precoding/beamforming signals after transmission, the interference is difficult to be eliminated by the usual equalization technique.
  • Embodiments of the present invention provide a method for transmitting a signal and a network device, which can maintain a low peak-to-average ratio of signal transmission and reduce interference between signals.
  • a first aspect of the embodiments of the present invention provides a method for transmitting a signal, including:
  • the first network device maps the first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ of length L ⁇ P to the first set of L ⁇ P subcarriers of the first subcarrier group
  • the first subcarrier group includes consecutive B equally spaced B subcarriers ⁇ c 0 , c 1 , . . . , c B-1 ⁇ , and c q represents a continuous equal interval distribution in the first subcarrier group.
  • the first network device generates a transmission signal according to a signal on a subcarrier of the first subcarrier group
  • the first network device sends the transmission signal.
  • K is a positive integer, and the total length of the sequence of the multi-path to-be-transmitted signal is less than or equal to K; L is a positive integer, indicating the number of repetitions, which is related to the number of paths of the multi-path to-be-transmitted signal.
  • the first set is a set of subcarriers c r(i)+l ⁇ K , and the number of subcarriers of the first set is greater than or equal to the signal occupied by the first sequence mapped to the signal on the first set.
  • the time domain signal corresponding to the first sequence generated according to the signal on the subcarrier of the first subcarrier group is transmitted together with other time domain signals to satisfy the single carrier characteristic, That is, when there are at least two sequences, the transmitted time domain signals corresponding to each of the at least two sequences satisfy the single carrier characteristic when transmitted together.
  • the method for transmitting a signal provided by the first aspect can maintain a low peak-to-average ratio of signal transmission, and the first set of subcarriers do not overlap with other sets of subcarriers, thereby reducing interference between signals during transmission.
  • the first network device may generate a second sending signal for the second sequence and send, specifically:
  • the first network device maps a second sequence ⁇ y 0 , y 1 , . . . , y L ⁇ Q-1 ⁇ of length L ⁇ Q to the L ⁇ Q subcarriers of the first subcarrier group
  • Q ⁇ K, Q is a positive integer
  • l is a positive integer
  • l 0 ⁇ L-1 , v ⁇ ⁇ 0,1, ...
  • the process of mapping to the second set may be performed concurrently with the process of mapping to the first set, or may be performed before or after the process of mapping to the first set.
  • the signal on the subcarrier of the first subcarrier group includes the signal on the first set and the signal on the second set, and the first network device is configured according to the signal on the first set. And transmitting the signal on the signal on the second set.
  • the first sub-carrier and the second set do not have the same sub-carrier, and the frequency division multiplexing is used to avoid the first sequence and the second in the transmission process. Interference between sequences.
  • This possible implementation is applied to two channel multiplexing, which can maintain low peak-to-average ratio and reduce interference between signals.
  • the sub-carriers in the first set and the second set are identical, and in this case, code division multiplexing, the spectrum resource utilization rate can be improved.
  • the first network device sends the first to-be-transmitted signal ⁇ h 0 , h 1 , .. ., h P-1 ⁇ performs discrete Fourier transform DFT to obtain ⁇ a 0 , a 1 , a 2 , ..., a P-1 ⁇ , according to ⁇ a 0 , a 1 , a 2 ,..., a P-1 ⁇ obtains the first sequence, and then performs transmission processing on the first sequence, so that the embodiment of the present invention can also be applied to data signal transmission.
  • ⁇ a 0 , a 1 , a 2 , . . . , a P-1 ⁇ is a reference signal sequence, or is a product of the reference signal sequence and the first to-be-transmitted signal.
  • a sequence; wherein the reference signal sequence may be a sequence generated by a Zadoff-Chu sequence, or may be a sequence of an LTE reference signal.
  • the sequence generated by the Zadoff-Chu sequence, the sequence of the LTE reference signal may represent a known signal, and the signal to be transmitted may represent a signal carrying information.
  • the subcarriers c r(i)+l ⁇ K are consecutive subcarriers with the interval J r in the first subcarrier group.
  • the interval J r is used to represent the interval between the nth subcarrier and the n+J r subcarriers, and n is a non-negative integer. For example, the interval between the first subcarrier and the second subcarrier is 1.
  • the first network device sends or receives control signaling, where the control signaling is used to indicate that the first sequence is mapped to phase rotation parameter information on the first set, where
  • the phase rotation parameter information includes the K, the rotation factor information e 2 ⁇ uj(r(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ e 2 ⁇ uj ⁇ l/L , the first set of subcarriers At least one of the number L ⁇ P and the phase rotation factor related information u.
  • the phase rotation parameter information may be used to notify the receiving end of the transmitting signal (which may be a second network device) the number of subcarriers of the first set, the phase rotation factor related information u on the first set, and the twiddle factor At least one of information e 2 ⁇ vj(s(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ e 2 ⁇ uj ⁇ l/L , so that the receiving end of the transmitted signal demodulates based on the information . If there is at least one sequence, the control signaling is used to indicate that each sequence in the at least one sequence is mapped to phase rotation parameter information on the corresponding set.
  • a second aspect of the embodiments of the present invention provides a method for transmitting a signal, including:
  • the second network device receives a first received signal corresponding to the first sequence from the first set of L ⁇ P subcarriers of the first subcarrier group;
  • the first subcarrier group includes B subcarriers that are continuously equally spaced ⁇ c 0 , c 1 , ..., c B-1 ⁇ , c q represents the number of consecutive q-subcarriers equally spaced in the first subcarrier group;
  • the first sequence ⁇ x 0 , x 1 , ..., x L ⁇ P-1 ⁇ is a sequence of length L ⁇ P carried on the subcarriers of the first set, B ⁇ L ⁇ K, P ⁇ K, B, P, K, L All are positive integers, L>1;
  • the second network device performs signal processing on the first received signal.
  • the method for transmitting a signal provided by the second aspect, receives a first received signal corresponding to a first sequence from a first set of first subcarrier groups, and performs signal processing on the first received signal, because the first sequence corresponds to the transmitted
  • the time domain signal has a low peak-to-average ratio when transmitted together with other time domain signals and the interference between the signals is small, so the second network device can demodulate the signal with higher accuracy.
  • the first subcarrier group has two sequences (the first sequence and the second sequence), and the second network device includes L ⁇ from the first subcarrier group.
  • y L ⁇ Q-1 ⁇ is carried in the second set
  • the process of receiving the second received signal may be performed simultaneously with the process of receiving the first received signal, or may be performed before or after the process of receiving the first received signal
  • the process of performing signal processing on the second transmission signal may be performed simultaneously with a process of signal processing the first received signal, or may be performed before or after a process of signal processing the second transmission signal.
  • the first set and the second set do not have the same subcarrier, or the first set and the second set of subcarriers are identical.
  • ⁇ a 0 , a 1 , a 2 , . . . , a P-1 ⁇ is a reference signal sequence, or is a product of the reference signal sequence and the first to-be-transmitted signal.
  • a sequence wherein the reference signal sequence may be a sequence generated by a Zadoff-Chu sequence, or may be a sequence of an LTE reference signal. The same is true for the second sequence.
  • the second network device receives or sends control signaling, where the control signaling is sent by the first network device, and the control signaling is used to indicate the first sequence mapping.
  • the phase rotation parameter information including the K, the rotation factor information e 2 ⁇ uj(r(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ e 2 ⁇ uj ⁇ l/L , at least one of the number of subcarriers L ⁇ P of the first set and the phase rotation factor related information u. If there is at least one sequence, the control signaling is used to indicate that each sequence in the at least one sequence is mapped to phase rotation parameter information on the corresponding set.
  • a third aspect of the embodiment of the present invention provides a first network device, including:
  • a processing module configured to map a first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ of length L ⁇ P to a first one of L ⁇ P subcarriers of the first subcarrier group
  • the first subcarrier group includes B subcarriers ⁇ c 0 , c 1 , . . . , c B-1 ⁇ continuously distributed at equal intervals, and c q represents consecutive equal intervals in the first subcarrier group.
  • the processing module is further configured to generate a sending signal according to a signal on a subcarrier of the first subcarrier group;
  • a sending module configured to send the sending signal.
  • a fourth aspect of the embodiments of the present invention provides a second network device, including:
  • a receiving module configured to receive, according to a first set of L ⁇ P subcarriers of the first subcarrier group, a first received signal corresponding to the first sequence; the first subcarrier group includes B subcarriers that are continuously equally spaced ⁇ c 0 , c 1 , . . .
  • C B ⁇ ⁇ , c q represents the number of consecutive q-subcarriers equally spaced in the first subcarrier group;
  • the first sequence ⁇ x 0 , x 1 ,...,x L ⁇ P-1 ⁇ is a sequence of length L ⁇ P carried on the subcarriers of the first set, B ⁇ L ⁇ K, P ⁇ K, B, P, K, L are positive integers, L>1;
  • a processing module configured to perform signal processing on the first received signal.
  • the fifth aspect of the embodiments of the present invention provides another first network device, including a processor, a transceiver, and a memory, where the first network device provided by the first aspect of the present invention is provided, and the first network device provided by the fifth aspect is provided.
  • the device may correspond to a corresponding module of the first network device provided by the third aspect.
  • a sixth aspect of the present invention provides a second network device, including a processor, a transceiver, and a memory, which are used to perform the second network device provided by the second aspect of the embodiments of the present invention.
  • the device may correspond to a corresponding module of the second network device provided by the fourth aspect.
  • a seventh aspect of the embodiments of the present invention provides a system for transmitting a signal, including the first network device provided by the third aspect and the second network device provided by the fourth aspect, or the first network device and the sixth device provided by the fifth aspect A second network device provided by the aspect.
  • the first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ of length L ⁇ P is mapped to the first subcarrier group including L ⁇ P subcarriers.
  • the first subcarrier group includes successively equally spaced B subcarriers ⁇ c 0 , c 1 , . . . , c B-1 ⁇ , and c q represents a continuous equal interval distribution in the first subcarrier group.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present invention is applied;
  • FIG. 2 is a schematic flowchart of a method for transmitting a signal according to Embodiment 1 of the present invention
  • 3a and 3b are schematic diagrams of frequency domain resource mapping according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for transmitting a signal according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic diagram of another frequency domain resource mapping according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 5 of the present invention.
  • FIG. 9 is a schematic flowchart of the embodiment shown in FIG. 8 before performing step 601;
  • FIG. 10 is a schematic structural diagram of a first network device according to an embodiment of the present invention.
  • FIG. 10b is a schematic structural diagram of another first network device according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a second network device according to an embodiment of the present invention.
  • FIG. 11b is a schematic structural diagram of another second network device according to an embodiment of the present invention.
  • a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • Both the application running on the computing device and the computing device can be components.
  • One or more components can reside within a process and/or execution thread, and the components can be located on one computer and/or distributed between two or more computers. Moreover, these components can execute from various computer readable media having various data structures stored thereon.
  • a component may pass according to a signal having one or more data packets (eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems) Local and / or remote processes to communicate.
  • data packets eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems
  • the technical solution of the embodiments of the present invention may be applied to an LTE architecture, and may also be applied to a Universal Mobile Telecommunications System (UMTS) UMTS Terrestrial Radio Access Network (UTRAN) architecture, or GSM. / GSM EDGE Radio Access Network (GERAN) architecture of the Enhanced Data Rate for GSM Evolution (EDGE) system.
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Universal Mobile Telecommunications System
  • GSM UMTS Terrestrial Radio Access Network
  • GERAN GSM EDGE Radio Access Network
  • EDGERAN Enhanced Data Rate for GSM Evolution
  • MME Mobile Management Entity
  • SGSN Serving GPRS Support
  • SGW Signaling Gate Way
  • PGW Packet Data Network Gateway
  • GGSN Gateway GPRS Support Node
  • the technical solution of the embodiment of the present invention can also be applied to other communication systems, such as a Public Land Mobile Network (PLMN) system, and even a future 5G communication system.
  • PLMN Public Land Mobile Network
  • the first network device in the embodiment of the present invention may be a device for communicating with the terminal device, for example, may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or may be a base station in a WCDMA system ( NodeB, NB), may also be an evolved base station (Evolutional Node B, eNB or eNodeB) in the LTE system, or the first network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a future 5G network. Network side equipment or network equipment in a future evolved PLMN network, and the like.
  • BTS Base Transceiver Station
  • NodeB, NB NodeB
  • Evolutional Node B, eNB or eNodeB evolved base station
  • the first network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a future 5G network.
  • the second network device in the embodiment of the present invention is a terminal device, which may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, and a personal digital processing.
  • a terminal device which may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, and a personal digital processing.
  • PDA Personal Digital Assistant
  • handheld device with wireless communication function meter Computing devices or other processing devices connected to wireless modems
  • in-vehicle devices wearable devices
  • terminal devices in future 5G networks and the like.
  • the term "article of manufacture” as used in this application encompasses a computer program accessible from any computer-readable device, carrier, or media.
  • the computer readable medium may include, but is not limited to, a magnetic storage device (eg, a hard disk, a floppy disk, or a magnetic tape, etc.), such as a compact disk (CD), a digital versatile disk (Digital Versatile Disk, DVD). Etc.), smart cards and flash memory devices (eg, Erasable Programmable Read-Only Memory (EPROM), cards, sticks or key drivers, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the present invention is applied.
  • the communication system 100 includes a first network device 102, which may include multiple antennas, such as antennas 104, 106, 108, 110, 112, and 114.
  • the first network device 102 can additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which can each include multiple components associated with signal transmission and reception (eg, processor, modulator, complex) Consumer, demodulator, demultiplexer or antenna, etc.).
  • the first network device 102 can communicate with the second network device 116 and the second network device 122, and can also be in communication with other second network devices.
  • the second network devices 116 and 122 can be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any communication for communicating over the wireless communication system 100. Other suitable equipment.
  • second network device 116 is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to second network device 116 over forward link 118 and from second network device through reverse link 120. 116 receives the information.
  • second network device 122 is in communication with antennas 104 and 106, wherein antennas 104 and 106 transmit information to second network device 122 over forward link 124 and from second network device 122 over reverse link 126.
  • the forward link 118 can utilize a different frequency band than that used by the reverse link 120, and the forward link 124 can utilize the reverse link. 126 different frequency bands used.
  • FDD Frequency Division Duplex
  • the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124, and a reverse link.
  • Link 126 can use a common frequency band.
  • Each antenna (or set of antennas consisting of multiple antennas) and/or regions designed for communication is referred to as a sector of the second network device 102.
  • the antenna group can be designed to communicate with a second network device in a sector of the coverage area of the second network device 102.
  • the transmit antenna of the first network device 102 may utilize beamforming to improve the forward links 118 and 124 during the first network device 102 communicating with the second network devices 116 and 122 via the forward links 118 and 124, respectively. Signal to noise ratio.
  • the first network device 102 utilizes beamforming to transmit to the second network devices 116 and 122 that are randomly dispersed in the relevant coverage area, as compared to the manner in which the first network device transmits signals to all of its second network devices through a single antenna. When the signal is received, the second network device in the neighboring cell will be less interfered.
  • the first network device 102, the second network device 116, or the second network device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device.
  • the wireless communication transmitting device can encode the data for transmission.
  • the wireless communication transmitting device may acquire (eg, generate, receive from other communication devices, or store in memory, etc.) a certain number of data bits to be transmitted over the channel to the wireless communication receiving device.
  • Such data bits may be included in a transport block (or multiple transport blocks) of data that may be segmented to produce multiple code blocks.
  • FIG. 1 is only a simplified schematic diagram of an example, and other network devices may also be included in the communication system, which are not shown in FIG.
  • the embodiment of the present invention provides a method for transmitting a signal, which can maintain a low peak-to-average ratio of signal transmission and reduce interference between signals during signal transmission.
  • FIG. 2 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 1 of the present invention. It should be noted that the first embodiment shown in FIG. 2 mainly introduces a process in which the first network device sends a certain signal to be sent in the multi-path to-be-transmitted signal.
  • the first network device maps the first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ of length L ⁇ P to the first subcarrier group including L ⁇ P subcarriers. On a collection.
  • the first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ is a sequence corresponding to a certain to-be-sent signal in the multi-path to-be-transmitted signal, and the first sequence may be A certain signal to be transmitted corresponding to the sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ is referred to as a first to-be-transmitted signal.
  • the first to-be-transmitted signal may be a data signal or a reference signal.
  • the reference signal may be an uplink reference signal (demodulation reference signal, sounding reference signal), or may be a downlink reference signal (cell-specific reference signal, user terminal-specific reference signal, multicast/multicast single frequency network (Multicast Broadcast Single Frequency Network, MBSFN) reference signal).
  • the data signal may be a data signal carrying control information or a data signal carrying data information to be transmitted.
  • the control information may be uplink control information carried by the uplink control channel, such as uplink control information carried on a physical uplink control channel (PUCCH), or downlink control information carried by the downlink control channel, such as physical downlink. Downlink control information carried on the Physical Downlink Control Channel (PDCCH).
  • PUCCH physical uplink control channel
  • PDCCH Physical Downlink Control Channel
  • the information to be transmitted may be system information carried by a broadcast channel, such as information carried on a Physical Broadcast Channel (PBCH), or a synchronization signal for synchronization, such as a Primary Synchronization Signal (PSS) or Secondary Synchronization Signal (SSS), etc.
  • the data signal may also be a signal carried on an uplink data channel, such as a signal carried on a Physical Uplink Shared Channel (PUSCH); or a signal carried on a downlink data channel, such as being carried in a physical A downlink shared channel (Physical Downlink Shared Channel, PDSCH) or the like.
  • PUSCH Physical Uplink Shared Channel
  • PDSCH Physical Downlink Shared Channel
  • the data signal may be a modulated signal, such as Quadrature Phase Shift Keying (QPSK), 16-symbol quadrature amplitude modulation ( Quadrature Amplitude Modulation (QAM), a 64-symbol QAM-modulated signal, the first network device performing Discrete Fourier Transform (DFT) on the first to-be-transmitted signal to obtain a length P
  • QPSK Quadrature Phase Shift Keying
  • QAM Quadrature Amplitude Modulation
  • DFT Discrete Fourier Transform
  • the first to-be-transmitted signal is the reference signal, directly mapping the first sequence corresponding to ⁇ a 0 , a 1 , a 2 , . . . , a P-1 ⁇ to the first sub-carrier group There is no need to perform a discrete Fourier transform on the first set.
  • ⁇ a 0 , a 1 , a 2 , . . . , a P-1 ⁇ may be a reference signal sequence, and may also be a sequence of a product of the reference signal sequence and the first signal to be transmitted.
  • the first to-be-transmitted signal is a signal carrying information
  • the reference signal sequence is a sequence of known signals, such as a sequence used by an uplink reference signal in an LTE system.
  • the sequence of the product of the reference signal sequence and the first signal to be transmitted is (s ⁇ x 0 , s ⁇ x 1 , s ⁇ x 2 , . . .
  • the first to-be-transmitted signal is represented, for example, may be a modulated signal, and (x 0 , x 1 , x 2 , . . . , x N-1 ) represents the reference signal sequence of length N.
  • the reference signal sequence may also be a sequence generated by a Zadoff-Chu sequence.
  • the Zadoff-Chu sequence has a good autocorrelation, that is, the arbitrary Zadoff-Chu sequence is not related to the sequence itself after the cyclic shift of n bits, that is, the correlation value is zero.
  • Zadoff-Chu sequences with different indicators of the same length may have good cross-correlation properties, and the cross-correlation values are close to zero.
  • the Zadoff-Chu sequence has a low PAPR.
  • the Zadoff-Chu sequence is still a Zadoff-Chu sequence after Fast Fourier Transformation (FFT) or Inverse Fast Fourier Transformation (IFFT).
  • FFT Fast Fourier Transformation
  • IFFT Inverse Fast Fourier Transformation
  • n 0, 1, 2, ..., N-1.
  • N is the length of the Zadoff-Chu sequence
  • q is a natural number that is mutually prime with N, and 0 ⁇ q ⁇ N, which is an indicator of the Zadoff-Chu sequence, different q values correspond to different Zadoff-Chu sequences
  • l is an integer Is the cyclic shift value of the ZC sequence.
  • the first sequence may also be a sequence of a product of a sequence generated by a Zadoff-Chu sequence and the first signal to be transmitted.
  • the first signal to be transmitted is a signal carrying information, and a sequence generated by a Zadoff-Chu sequence. A sequence of known signals.
  • the reference signal sequence is a sequence generated by a Zadoff-Chu sequence, and specifically, the generated sequence may be extended or intercepted by a Zadoff-Chu sequence.
  • the first subcarrier group includes B subcarriers ⁇ c 0 , c 1 , . . . , c B-1 ⁇ which are continuously equally spaced, and the number of subcarriers of the first subcarrier group is B, B ⁇ L ⁇ K.
  • the sequence of c q represents the number of the qth subcarriers continuously distributed in the first subcarrier group, for example, c q is the number of the B subcarriers in order of frequency from high to low or low to high.
  • K is a positive integer, which is a parameter used to determine the subcarrier number of the first sequence, and the total length of the sequence obtained by superimposing the sequence length of each signal to be transmitted in the multipath to be transmitted signal is less than or equal to K;
  • L is positive
  • An integer, L>1, represents a multiple of K, which is related to the number of ways of the multi-path to be transmitted signal, and L may be the same as the number of paths of the multi-path to-be-transmitted signal.
  • the sequence length P of the first sequence is less than or equal to K. When P is less than K, it is used to reserve other channels. If the number of paths of multiple signals to be transmitted is large, P is much smaller than K.
  • the number of subcarriers of the set is greater than or equal to the sequence length L ⁇ P of the first sequence.
  • sequence element x i+l ⁇ P in the first sequence is mapped to the subcarrier c r(i)+l ⁇ K
  • i a variable
  • i 0, 1, 2, ..., P-1
  • r (i) ⁇ 0,1,2,...,K-1 ⁇ for different i values, the value of r(i) is different
  • l is a positive integer
  • l 0 ⁇ L-1
  • j is the imaginary part of the plural.
  • the set of subcarriers c r(i)+l ⁇ K is the first set, the first set is a set of the first subcarrier group, and the first set includes the first set
  • a subcarrier group may include one of a plurality of sets, and the number of specific sets is related to the number of channels of frequency division multiplexing and code division multiplexing multiple signals to be transmitted. For frequency division multiplexing, the subcarriers in multiple sets are not identical; for code division multiplexing, the subcarriers in multiple sets are identical.
  • the subcarriers corresponding to the sequence of signals to be transmitted of other paths may be different consecutive Q elements.
  • L-channel signals each of which has a sequence length of P
  • P elements of the sequence of each signal are mapped to LP sub-carriers of the first sub-carrier group, for example, the first path signal is mapped to the first A first set of subcarrier groups, a second way signal is mapped to a second set of the second set of subcarriers, and the like.
  • the subscript q of the subcarrier number c q corresponding to the first set is ⁇ 0, 1, ..., P-1; K, K+1, ..., K+P-1; (L-1)K, (L-1)K+1,...,(L-1)K+P-1 ⁇
  • the subscript q of the subcarrier number cq corresponding to the second set is ⁇ P, P+1,...,2P-1; K+P, K+P+1,...,K+2P-1;...;(L-1)K+P,(L- 1) K+P+1,...,(L-1)K+2P-1 ⁇
  • the subscript q of the subcarrier number cq corresponding to the third set is ⁇ 2P, 2P+1 ,...,3P-1;K+2P,K+2P+1,...,K+3P-1;...;(L-1)K+2P,(L-1)K+2P +1,...,(L-1)K+3P-1 ⁇ .
  • the first network device generates a sending signal according to a signal on a subcarrier of the first subcarrier group.
  • the first network device converts the signal on the subcarrier of the first subcarrier group to the time domain, because the signal on the subcarrier of the first subcarrier group is a signal in the frequency domain. And generating a transmission signal, where the transmission signal is a radio frequency (RF) signal.
  • the first network device performs an IFFT transform on the elements on the first set to obtain the sending signal.
  • the first network device sends the sending signal.
  • the first network device sends the sending signal by using an antenna port, that is, sending a radio frequency signal to a second network device in the coverage of the first network device.
  • the number of subcarriers in the first subcarrier group is B
  • the phase rotation factor on the first set is e 2 ⁇ uj(r(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ e 2 ⁇ uj ⁇ l/L
  • phase rotation factor of the first set represents a phase rotation term acting on the first sequence.
  • the first network device carries the frequency domain resource information occupied by the first sequence, the phase rotation factor on the frequency domain resource, K, the phase rotation factor related information u, and the first set by using the downlink control information.
  • the number of subcarriers L ⁇ P is notified to the second network device.
  • the downlink control information may be sent through a PDCCH channel, and the second network device may obtain the foregoing frequency domain resource from a PDCCH channel.
  • the first sequence ⁇ x 0 , x 1 , . . . , x L ⁇ P-1 ⁇ of length L ⁇ P is mapped to the first subcarrier group including L ⁇ P subcarriers.
  • the first subcarrier group includes consecutively equally spaced B subcarriers ⁇ c 0 , c 1 , . . .
  • c B-1 ⁇ , and c q is the frequency of the B subcarriers from high Numbers to low or low to high order
  • FIG. 3a and 3b are schematic flowcharts of frequency domain resource mapping according to an embodiment of the present invention. It should be noted that FIG. 3a and FIG. 3b exemplify the mapping process of two sequences (the first sequence and the second sequence) in the frequency domain resource. As shown in Figures 3a and 3b, the first sequence maps to the subcarriers represented by the black areas of Figures 3a and 3b, and the second sequence maps to the subcarriers represented by the white areas of Figures 3a and 3b, each black area representing P subcarriers, each white area represents Q subcarriers. As can be seen from FIG. 3a and FIG. 3b, the mapped subcarriers are arranged at intervals, and there is no overlap between the black area and the white area.
  • 3a and 3b show the case of P+Q ⁇ K, and the signals on the subcarriers that are not occupied by the first sequence and the second sequence default to 0, because the frequency division of the two signals can be orthogonal. Improve the reliability of transmission.
  • the subcarrier number of the first black area is C r(i)
  • the subcarrier number of the first black area is C r(i)+K
  • the subcarrier number of the first white area is C s(i )
  • the subcarrier number of the first black area is C s(i)+K
  • the 2P subcarriers corresponding to the black area are the first set
  • the 2Q subcarriers corresponding to the white area are the second set.
  • FIG. 4 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 2 of the present invention. It should be noted that the second embodiment shown in FIG. 4 mainly introduces a process in which the first network device sends two signals to be sent. Parts of the embodiment shown in FIG. 4 that are the same as or similar to those of the embodiment shown in FIG. 2 will not be described again.
  • the first network device maps the first sequence and the second sequence to the first set and the second set in the first subcarrier group, respectively, and performs IFFT transform on the signals on the first set and the second set. A signal is transmitted and the transmitted signal is transmitted.
  • the first sequence and/or the second sequence may be a sequence corresponding to a data signal or a sequence corresponding to a reference signal, such as one or two of the sequences in the embodiment shown in FIG. 2.
  • the signal to be transmitted corresponding to the first sequence may be referred to as a first to-be-transmitted signal
  • the signal to be transmitted corresponding to the second sequence is referred to as a second to-be-transmitted signal.
  • the length of the second sequence ⁇ y 0 , y 1 , . . .
  • the first set and the second set do not have the same subcarrier, and the frequency is multiplexed at this time; the first set and the second set of subcarriers are identical, and the code is Sub-multiplexing.
  • J r and J s may be the same or different. When J r is the same as J s , for example, it is equal to 1.
  • the occupied frequency resources are exactly the same size and maintain good low PAPR characteristics.
  • the interval J s is used to indicate the interval between the nth subcarrier and the n+J s subcarriers, and n is a non-negative integer. For example, the interval between the first subcarrier and the second subcarrier is 1.
  • FIG. 7 is a schematic diagram of another frequency domain mapping according to an embodiment of the present invention.
  • the first set is 8 sub-carriers marked with gray in the second column in FIG. 7, and the second set is 4 sub-carriers marked in gray in the third column in FIG. 7.
  • the length of the first sequence is 4, and the 8 sub-maps of the first set are mapped.
  • the i of the number c i corresponding to the subcarrier of the first set is: ⁇ 0, 2, 4, 6; 8, 10, 12, 14 ⁇
  • the i of the number c i corresponding to the subcarrier of the second set is: ⁇ 1 , 5; 9, 13 ⁇ .
  • the corresponding The average power of the time domain signals corresponding to the first sequence and the second sequence after the IFFT may be different due to the number of subcarriers, causing an increase in PAPR. Therefore, when the P of the first sequence and the second sequence Q are different, the power on one subcarrier occupied by the signal corresponding to the first sequence and one subcarrier occupied by the signal corresponding to the second sequence
  • the ratio of the power on the Q/P is that the PAPR will not increase due to the power configuration.
  • multiple signals are transmitted on the same antenna, still retaining low PAPR characteristics.
  • the first sequence and the second sequence are mapped to resources orthogonal to the frequency division in the first subcarrier group, so that interference between each other is small, and the reliability of the transmission and the second network device can be improved. Receive signal quality.
  • the second sequence is a reference signal sequence, such as a sequence of reference signals in the LTE system or a sequence generated by a Zadoff-Chu sequence, or a sequence of a product of the sequence of reference signal sequences and a second signal to be transmitted.
  • the time domain signals transmitted after the IFFT corresponding to the first sequence and the second sequence are non-zero elements when the elements at the overlapping positions are not different.
  • the overlapping position means that the elements are in the same position in the sequence in two time domain sequences also including M elements.
  • the time domain signals transmitted by the IFFT corresponding to the first sequence and the second sequence are non-zero when the elements at the same time are different.
  • the time-domain signals after the IFFT corresponding to the first sequence and the second sequence are time-division multiplexed, so that the two sequences pass through a series of subsequent DFT, IFFT, and the like. After conversion and other processing, the transmitted signal has a low PAPR.
  • the process of mapping the second sequence may be performed concurrently with the process of mapping the first sequence, or may be performed before or after the process of mapping the first sequence.
  • FIG. 5 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 3 of the present invention. It should be noted that the third embodiment shown in FIG. 5 mainly introduces a process in which the first network device sends two signals to be sent. Parts of the embodiment shown in FIG. 5 that are the same as or similar to those of the embodiment shown in FIG. 2 or FIG. 4 will not be described again.
  • the first network device performs Fourier transform processing on the first to-be-transmitted signal and the second to-be-transmitted signal to obtain a first sequence and a second sequence, and then maps the first sequence and the second sequence to the first sub-separant On the first set and the second set in the carrier group, the elements on the first set and the second set are IFFT-transformed to obtain a transmission signal, and the transmission signal is transmitted.
  • the first to-be-transmitted signal and the second to-be-transmitted signal are both data signals, and are required to perform Fourier transform to obtain the first sequence and the second sequence.
  • FIG. 6 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 4 of the present invention. It should be noted that the fourth embodiment shown in FIG. 6 mainly introduces a process in which the first network device sends two signals to be sent. Figure 6 shows an embodiment Parts that are the same as or similar to those of the embodiment shown in FIG. 2 or FIG. 4 or FIG. 5 will not be described again.
  • the first network device performs a Fourier transform process on the second to-be-transmitted signal to obtain a second sequence, and then maps the first sequence and the second sequence corresponding to the first to-be-transmitted signal to the first sub-carrier group respectively. And performing a IFFT transform on the first set and the elements on the second set to obtain a transmission signal, and transmitting the transmission signal.
  • the first to-be-transmitted signal is a reference signal
  • the second to-be-transmitted signal is a data signal
  • the second to-be-transmitted signal needs to be Fourier-transformed to obtain the second sequence. It can be deduced that when there is at least one data signal in the multi-path to-be-transmitted signal, the first network device performs discrete Fourier transform processing on each of the at least one data signal to obtain at least one sequence, and then Each of the at least one sequence is mapped onto the first set of subcarriers.
  • the other signals to be sent may be processed according to the processing method of the second sequence to implement multiple Channel multiplexing.
  • the length of the third sequence ⁇ z 0 , z 1 , z 2 , . . .
  • z L ⁇ R-1 ⁇ is L ⁇ R, R ⁇ K, in the third sequence
  • the sequence element z i+l ⁇ R is mapped to the subcarrier c w(i)+l ⁇ K
  • z i+l ⁇ R d i ⁇ e 2 ⁇ vj(w(i)+l ⁇ K)/(L ⁇ K)
  • z i+l ⁇ R d i ⁇ e 2 ⁇ vj ⁇ l/L
  • the value of w(i) is different
  • l is a positive integer
  • l 0 ⁇ L-1
  • j is the imaginary part of the complex number
  • ⁇ d 0 , d 1 , ..., d R-1 ⁇ is a sequence of length R.
  • the third set and the second set do not have the same subcarrier, and the third set and the first set do not have the same subcarrier, so that interference between each other is small, and the transmission is reliable. And the received signal quality of the second network device.
  • the sub-carriers in the first set and the second set are identical, and the third set and the sub-carriers in the first set are identical, and code division multiplexing is implemented.
  • the elements are different from the ones in the patent application with the application number CN201610311497.8.
  • the multi-channel signals in CN201610311497.8 are staggered.
  • the first network device or the second network device may send or receive control signaling, where the control signaling is used to indicate that the first sequence is mapped to a phase on the first set.
  • Rotation parameter information including the K, twiddle factor information e 2 ⁇ uj(r(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ e 2 ⁇ uj ⁇ l/L , the first At least one of a set of subcarrier numbers L ⁇ P and phase rotation factor related information u.
  • the control signaling sent or received by the first network device or the second network device includes twiddle factor information e 2 ⁇ uj(r(i)+l ⁇ K)/(L ⁇ K) or a i ⁇ At least one of e 2 ⁇ uj ⁇ l/L and phase rotation factor related information u.
  • the value u of the first sequence and the value v of the second sequence are different.
  • FIG. 8 is a schematic flowchart diagram of a method for transmitting a signal according to Embodiment 5 of the present invention. It should be noted that the fifth embodiment shown in FIG. 8 mainly introduces a process in which the second network device receives a certain signal to be transmitted in the multi-path to-be-transmitted signal.
  • the second network device receives the first received signal corresponding to the first sequence from the first set of the first subcarrier groups.
  • the received signal corresponding to the first sequence is a signal generated by the first network device according to the first sequence mapped to the signal on the first set, that is, in the case that there is at least one sequence, the first
  • the received signal corresponding to the sequence is a part of the transmission signal generated by the first network device according to the signal on the subcarriers on the first subcarrier group, that is, each sequence of the multiple sequences of the transmission signal corresponds to one receive signal.
  • FIG. 9 is a schematic flowchart of the embodiment shown in FIG. 8 before performing step 601 .
  • the second network device before performing step 601 shown in FIG. 8, performs fast Fourier transform FFT processing on the received signal to obtain a received signal of the subcarriers on the first subcarrier group.
  • the second network device performs signal processing on the first received signal.
  • the signal processing may specifically include, for the data signal, performing equalization on the first received signal, and the like, and the reference signal may specifically include performing channel estimation processing on the first received signal, etc., and includes, for the sequence of carrying information, Balance processing.
  • the second network device performs signal processing on the first received signal, and may further include: the second network device performing inverse discrete Fourier transform IDFT processing on the first received signal to obtain the received first sequence , demodulation processing.
  • the signal processing further includes performing a sequence correlation process and a demodulation process on the first received signal.
  • the second network device may further receive a second sequence corresponding to the second receiving from the subcarriers of the first subcarrier group The signal, even the third received signal corresponding to the third sequence, and even more sequences corresponding to the received signal.
  • the multi-channel to-be-transmitted signal sent by the first network device conforms to the single-carrier characteristic, so that the received signal received by the second network device can maintain the low-peak-to-average ratio of the signal on the transmitting side, thereby improving the average power of the transmitted signal, thereby It is ensured that the receiving side has a good receiving signal to noise ratio.
  • the multi-path to-be-transmitted signal does not overlap during the mapping process, so that the interference between the received signals received by the second network device is small.
  • each network device such as the first network device, the second network device, etc.
  • each network device includes corresponding hardware structures and/or software modules for performing the respective functions.
  • the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the modules and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.
  • the embodiment of the present invention may perform the division of the function modules on the first network device, the second network device, and the like according to the foregoing method.
  • each function module may be divided according to each function, or two or more functions may be integrated in the function.
  • a processing module In a processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 10a shows a possible structural diagram of the first network device involved in the above embodiment.
  • the first network device 700 includes a processing module 701 and a sending module 702.
  • the processing module 701 is configured to perform control management on actions of the first network device, for example, the processing module 701 is configured to support the first network device to perform the processes 201 and 202 in FIG. 2, and/or other techniques for the techniques described herein. process.
  • the sending module 702 is configured to support communication between the first network device and the second network device or other network entity.
  • the first network device may further include a storage module 703 for storing program codes and data of the first network device.
  • the processing module 701 can be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and a dedicated integrated circuit.
  • ASIC Application-Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the transmitting module 702 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 703 can be a memory.
  • the processing module 701 is a processor
  • the sending module 702 is a transceiver
  • the storage module 703 is a memory
  • the first network device involved in the embodiment of the present invention may be the first network device shown in FIG. 10b.
  • the first network device 710 includes a processor 712, a transceiver 713, and a memory 711.
  • the first network device 710 may further include a bus 714.
  • the transceiver 713, the processor 712, and the memory 711 may be connected to each other through a bus 714.
  • the bus 714 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (abbreviated). EISA) bus and so on.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus 714 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 10b, but it does not mean that there is only one bus or one type of bus.
  • FIG. 11a shows a possible structural diagram of the second network device involved in the above embodiment.
  • the second network device 800 includes a receiving module 801 and a processing module 802.
  • the processing module 802 is configured to control management of actions of the second network device, for example, the processing module 802 is configured to support the second network device to perform the process 602 of FIG. 8, and/or other processes for the techniques described herein.
  • the receiving module 801 is configured to support communication between the second network device and the first network device or other network entity.
  • the second network device may further include a storage module 803 for storing program codes and data of the second network device.
  • the processing module 802 can be a processor or a controller, and can be, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific). Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the receiving module 801 can be a transceiver, a transceiver circuit, a communication interface, or the like.
  • the storage module 803 can be a memory.
  • the second network device involved in the embodiment of the present invention may be the second network device shown in FIG. 11b.
  • the second network device 810 includes a processor 812, a transceiver 813, and a memory 811.
  • the second network device 810 may further include a bus 814.
  • the transceiver 813, the processor 812, and the memory 811 may be connected to each other through a bus 814; the bus 814 may be a peripheral component interconnect standard bus or an extended industry standard structure bus or the like.
  • the bus 814 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11b, but it does not mean that there is only one bus or one type of bus.
  • the steps of the method or algorithm described in connection with the disclosure of the embodiments of the present invention may be implemented in a hardware manner, or may be implemented by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, software
  • the module can be stored in random access memory (RAM), flash memory, read only memory (ROM), Erasable Programmable ROM (EPROM), and electrically erasable Programmable EPROM (EEPROM), registers, hard disk, removable hard disk, read-only optical disk (CD-ROM) or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a core network interface device.
  • the processor and the storage medium may also exist as discrete components in the core network interface device.
  • the functions described in the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof.
  • the functions may be stored in a computer readable medium or transmitted as one or more instructions or code on a computer readable medium.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

La présente invention concerne un procédé d'émission de signaux et un dispositif de réseau. Le procédé comprend les étapes suivantes : un premier dispositif de réseau mappe une première séquence {x0, x1,...,xL·P-1} d'une longueur de L·P sur un premier ensemble, comprenant L·P sous-porteuses, d'un premier groupe de sous-porteuses, le premier groupe de sous-porteuses contenant B sous-porteuses {c0,c1,...,cB-1} distribuées en continu à intervalles égaux, cq indiquant le nombre de sous-porteuses q des sous-porteuses distribuées en continu à intervalles égaux, B≤L·K, P≤K, et l'ensemble de B, P, K et L étant des entiers positifs, et L＞1 ; mapper l'élément de séquence xi+l·P dans la première séquence sur la sous-porteuse cr(i)+l·K, xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K) ou xi+l·P＝ai·e2πuj·l/L, i étant une variable, i＝0, 1, 2,...,P-1, r(i)∈{0, 1, 2,...,K-1}, pour différentes valeurs de i, r(i) ayant différentes valeurs, l étant un nombre entier positif, l＝0～L-1, u∈{0, 1,...,L-1}, j étant une partie imaginaire d'un nombre complexe, et {a0, a1,...,aP-1} étant une séquence d'une longueur de P ; et générer un signal de transmission d'après un signal sur une sous-porteuse du premier groupe de sous-porteuses, et transmettre le signal de transmission généré. Les modes de réalisation de la présente invention peuvent maintenir un faible rapport de la puissance de crête à la puissance moyenne pour une transmission de signaux et réduire le brouillage entre signaux.
PCT/CN2017/094107 2016-07-30 2017-07-24 Procédé d'émission de signaux et dispositif de réseau Ceased WO2018024127A1 (fr)

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CN112583569A (zh) * 2019-01-10 2021-03-30 华为技术有限公司 信号处理的方法和装置
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CN111699656A (zh) * 2019-01-11 2020-09-22 联发科技股份有限公司 低papr参考信号
CN111699656B (zh) * 2019-01-11 2023-05-05 联发科技股份有限公司 用户设备及其无线通信方法
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WO2022262575A1 (fr) * 2021-06-18 2022-12-22 华为技术有限公司 Procédé et appareil de transmission de signal
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