WO2018024127A1 - 一种传输信号的方法及网络设备 - Google Patents

一种传输信号的方法及网络设备 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)
French (fr)
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
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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

本发明实施例提供一种传输信号的方法及网络设备，其中方法包括如下步骤：第一网络设备将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；根据第一子载波组的子载波上的信号生成发送信号并发送生成的发送信号。本发明实施例能够保持信号传输的低峰均比，并降低信号之间的干扰。

Description

一种传输信号的方法及网络设备 技术领域
本发明涉及移动通信技术领域，具体涉及一种传输信号的方法及网络设备。
背景技术
在无线通信中，频谱是非常昂贵的资源。现代通信系统，例如，全球移动通讯(Global System for Mobile Communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)2000系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统以及第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)的长期演进(Long Term Evolution，LTE)系统，通常都工作在3GHz以下的频谱上。随着智能终端业务的扩展，特别是视频业务的出现，当前的频谱资源已经难以满足用户对容量需求的爆炸式增长。具有更大的可用带宽的高频频段特别是毫米波频段，日益成为下一代通信系统的候选频段，例如3GHz-200GHz频段。现代通信系统通常使用多天线技术来提高系统的容量和覆盖范围，以改善用户的体验。将高频频段技术应用于多天线中，可以大大减小多天线配置的尺寸，从而便于站址的获取和更多天线的部署。然而，与现有LTE等系统的工作频段不同的是，高频频段将导致更大的路径损耗，特别是大气、植被等因素的影响更进一步加剧了无线传播的损耗。
为了克服高频传输带来的大路径损耗，波束赋形被采用。用户通过数字波束赋形或模拟波束赋形的方式进行多用户复用的数据发射。多用户复用的各种技术中，正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)技术由于表现出强的抗多径干扰能力，简单的离散傅里叶变换实现，以及有利于多天线传输技术等特点，而被广泛应用于LTE系统中的下行信号传输中。
LTE系统中的上行信号传输可以采用离散傅里叶变换扩展正交频分复用(Discrete Fourier Transform Spread OFDM，DFT-S-OFDM)技术。DFT-S-OFDM技术能够实现与单载波信号相近的峰均比(Peak to Average Power Ratio，PAPR)性能，低PAPR可减低硬件实现的复杂度和成本。当不同用户所占用的子载波组不重叠时，DFT-S-OFDM可实现正交频分多址，由此得到单载波正交频分多址方案，因此，DFT-S-OFDM技术特别适用于移动通信系统的上行传输。
当前LTE系统中定义的单载波传输是指在时域上符合单载波特性，这样可以获得较低的PAPR。在频域上，则仍可以通过集中式单载波传输或分布式单载波传输两种方式实现。对于集中式单载波传输，一个用户的一种发送信号(数据信号或参考信号)在频域上占用连续的频谱(即频域子载波是排列在一起的)，占用的频谱是整个系统带宽的一部分。对于分布式单载波传输，一个用户的一种发送信号(数据信号或参考信号)在频域上则占用非连续的频谱。现有的技术中，对于一个用户的多个数据信号或参考信号传输来说，为保持与单载波信号相近的低PAPR，数据信号和参考信号(例如解调参考信号(Demodulation Reference Signal，DMRS))在相同的天线上传输时采用时分复用的方式进行传输。
然而采用高频频段技术时，在一些特殊子帧中要求在同一个时域符号上同时传输数据 信号和参考信号。例如，一个用户在特殊子帧的最后一个符号上需要同时传输上行数据信号和上行参考信号。此时，为了进行同一个符号内的数据信号和参考信号同时传输，可以将最后一个符号内的多个子载波分为互不重叠的两个子载波组，以分别传输上行数据信号和上行参考信号。换而言之，多个子载波被频分为两个梳齿，梳齿1用于上行数据信号的传输，梳齿2用于上行参考信号的传输。
上述方案可以实现数据信号和参考信号的同时传输，且通过将待传输的两路信号进行频分正交的发射可降低两路信号间的干扰。但由于多个子载波被分成两个梳齿来同时传输数据信号和参考信号，因此在相同的天线上传输时单载波特性被破坏，从而造成较高的PAPR。
此外，现有的技术也可以采用以两路时域信号进行复用的方法。例如，第一路时域信号序列为a0,a1,…,aN-1，记作{ai}；第二路时域信号序列为b0,b1,…,bN-1，记作{bi}。在离散傅里叶变换(Discrete Fourier Transform，DFT)前进行两路时域信号序列的时分复用，形成时域信号序列a0,a1,…,aN-1,b0,b1,…,bN-1。如果第一路时域信号序列和第二路时域信号序列都是低PAPR的序列(例如，两路时域信号序列为DFT-S-OFDM形式的时域波形或其他低PAPR的单载波时域波形)，则上述操作可以保证时分复用后的时域信号序列仍然为低PAPR的序列。然而，该方案会导致两路发射信号在经过信道后由于多经效应存在信号间干扰，彼此之间的干扰较大。特别是当两路信号是在发送时经过了不同的空间域预编码/波束赋形(Precoding/Beamforming)后的信号时，干扰很难通过通常的均衡技术进行消除。
发明内容
本发明实施例提供一种传输信号的方法及网络设备，能够保持信号传输的低峰均比，并降低信号之间的干扰。
本发明实施例第一方面提供一种传输信号的方法，包括：
第一网络设备将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L>1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
所述第一网络设备根据所述第一子载波组的子载波上的信号生成发送信号；
所述第一网络设备发送所述发送信号。
具体而言，K为正整数，多路待发送信号的序列总长小于或者等于K；L为正整数，表示重复次数，与所述多路待发送信号的路数有关。所述第一集合即为子载波cr(i)+l·K的集合，所述第一集合的子载波数大于或等于所述第一序列映射到所述第一集合上的信号占用的子载波的个数，进一步的，根据所述第一子载波组的子载波上的信号生成的所述第一序列对应的发送的时域信号和其它时域信号一起发送时满足单载波特性，即存在至少两个序列时，至少两个序列中每个序列对应的发送的时域信号一起发送时满足单载波特性。
第一方面提供的传输信号的方法，能够保持信号传输的低峰均比，同时第一集合的子载波不与其它集合的子载波重叠，因此可以降低传输过程中信号之间的干扰。
在一种可能实现的方式中，存在两路待发送信号，所述第一网络设备可针对第二序列生成第二发送信号并发送，具体的：
所述第一网络设备将长度为L·Q的第二序列{y0,y1,...,yL·Q-1}映射到所述第一子载波组的包括L·Q个子载波的第二集合上；Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列。
在该种可能实现的方式中，映射到所述第二集合的过程可与映射到所述第一集合的过程同时执行，也可在映射到所述第一集合的过程之前或之后执行。此时，所述第一子载波组的子载波上的信号包括所述第一集合上的信号和所述第二集合上的信号，所述第一网络设备根据所述第一集合上的信号和所述第二集合上的信号生成所述发送信号。
在一种可能实现的方式中，所述第一集合和所述第二集合中没有相同的子载波，此时为频分复用，可以避免传输过程中所述第一序列与所述第二序列之间的干扰。该种可能实现的方式，应用于两个信道复用，既能保持低峰均比又能降低信号之间的干扰。
在一种可能实现的方式中，所述第一集合和所述第二集合中的子载波完全相同，此时为码分复用，可以提高频谱资源利用率。
在一种可能实现的方式中，所述B、所述P、所述Q、所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
在一种可能实现的方式中，若所述第一序列对应的第一待发送信号为数据信号，则所述第一网络设备对所述第一待发送信号{h0,h1,...,hP-1}进行离散傅里叶变换DFT得到{a0,a1,a2,...,aP-1}，根据{a0,a1,a2,...,aP-1}得到所述第一序列，再对所述第一序列进行传输处理，使得本发明实施例也可以应用于数据信号的传输。
在一种可能实现的方式中，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序 列与所述第一待发送信号的乘积的序列；其中，所述参考信号序列可为Zadoff-Chu序列生成的序列，或可为LTE参考信号的序列。对{b0,b1,...,bQ-1}于同理。其中，所述Zadoff-Chu序列生成的序列、所述LTE参考信号的序列可表示已知信号，待发送信号可表示承载信息的信号。
在一种可能实现的方式中，{a0,a1,...,aP-1}为
Figure PCTCN2017094107-appb-000001
n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
Figure PCTCN2017094107-appb-000002
n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。换言之，{a0,a1,...,aP-1}和{b0,b1,...,bQ-1}为序列en,n＝0,1,2,...,P-1的时域移位序列。
在一种可能实现的方式中，子载波cr(i)+l·K中的{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素，进一步的，对于任一0＜l＜L，子载波cr(i)+l·K为所述第一子载波组中连续的子载波。同理{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
在一种可能实现的方式中，子载波cr(i)+l·K中的{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数，即在序列{0,1,2,...,K-1}中每间隔Jr取一个元素，直至取P个元素，进一步的，对于任一0＜l＜L，子载波cr(i)+l·K为所述第一子载波组中间隔为Jr的连续的子载波。同理{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，Jr与Js可以相同也可以不相同。间隔为Jr用来表示第n个子载波和第n+Jr个子载波之间的间隔，n是非负整数。例如第1个子载波和第2个子载波之间间隔为1。
在一种可能实现的方式中，所述第一网络设备发送或者接收控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。所述相位旋转参数信息可用于告知所述发送信号的接收端(可为第二网络设备)所述第一集合的子载波个数、所述第一集合上相位旋转因子相关信息u、旋转因子信息e2πvj(s(i)+l·K)/(L·K)或ai·e2πuj·l/L等信息中的至少一个，以便所述发送信号的接收端根据这些信息进行解调。若存在至少一个序列，则所述控制信令用于指示所述至少一个序列中每个序列映射到对应集合上的相位旋转参数信息。
本发明实施例第二方面提供一种传输信号的方法，包括：
第二网络设备从第一子载波组的包括L·P个子载波的第一集合上接收第一序列对应的第一接收信号；所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号；所述第一序列{x0,x1,...,xL·P-1}为承载在所述第一集合的子载波上的长度为L·P的序列，B≤L·K， P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
所述第二网络设备对所述第一接收信号进行信号处理。
第二方面提供的传输信号的方法，从第一子载波组的第一集合上接收第一序列对应的第一接收信号，并对第一接收信号进行信号处理，由于第一序列对应的发送的时域信号和其它时域信号一起发送时具有低峰均比且信号间的干扰小，因此第二网络设备能够解调出准确性较高的信号。
在一种可能实现的方式中，所述第一子载波组存在两个序列(所述第一序列和第二序列)，所述第二网络设备从所述第一子载波组的包括L·Q个子载波的第二集合上接收第二序列对应的第二接收信号；所述第二序列{y0,y1,...,yL·Q-1}为承载在所述第二集合上的子载波上的长度为L·Q的序列，Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列；。
在该种可能实现的方式中，接收所述第二接收信号的过程可与接收所述第一接收信号的过程同时执行，也可在接收所述第一接收信号的过程之前或之后执行，同理对所述第二发送信号进行信号处理的过程可与对所述第一接收信号进行信号处理的过程同时执行，也可在对所述第二发送信号进行信号处理的过程之前或之后执行。
在一种可能实现的方式中，所述第一集合和所述第二集合中没有相同的子载波，或所述第一集合和所述第二集合中的子载波完全相同。
在一种可能实现的方式中，所述B、所述P、所述Q、所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
在一种可能实现的方式中，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序列与所述第一待发送信号的乘积的序列；其中，所述参考信号序列可为Zadoff-Chu序列生成的序列，或可为LTE参考信号的序列。对于所述第二序列同理。
在一种可能实现的方式中，{a0,a1,...,aP-1}为
Figure PCTCN2017094107-appb-000003
n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
Figure PCTCN2017094107-appb-000004
n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。
在一种可能实现的方式中，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元 素。{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
在一种可能实现的方式中，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数。{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，其中，Js为正整数。
在一种可能实现的方式中，所述第二网络设备接收或者发送控制信令，所述控制信令可由所述第一网络设备发送，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。若存在至少一个序列，则所述控制信令用于指示所述至少一个序列中每个序列映射到对应集合上的相位旋转参数信息。
本发明实施例第三方面提供一种第一网络设备，包括：
处理模块，用于将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
所述处理模块，还用于根据所述第一子载波组的子载波上的信号生成发送信号；
发送模块，用于发送所述发送信号。
本发明实施例第三方面提供的第一网络设备用于执行本发明实施例第一方面提供的传输信号的方法，在此不再赘述。
本发明实施例第四方面提供一种第二网络设备，包括：
接收模块，用于从第一子载波组的包括L·P个子载波的第一集合上接收第一序列对应的第一接收信号；所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号；所述第一序列{x0,x1,...,xL·P-1}为承载在所述第一集合的子载波上的长度为L·P的序列，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P 的序列；
处理模块，用于对所述第一接收信号进行信号处理。
本发明实施例第四方面提供的第二网络设备用于执行本发明实施例第二方面提供的传输信号的方法，在此不再赘述。
本发明实施例第五方面提供另一种第一网络设备，包括处理器、收发器和存储器，用于执行本发明实施例第一方面提供的，并且第五方面提供的第一网络设备的各器件可以与第三方面提供的第一网络设备相应模块对应。
本发明实施例第六方面提供另一种第二网络设备，包括处理器、收发器和存储器，用于执行本发明实施例第二方面提供的，并且第六方面提供的第二网络设备的各器件可以与第四方面提供的第二网络设备相应模块对应。
本发明实施例第七方面提供一种传输信号的系统，包括第三方面提供的第一网络设备和第四方面提供的第二网络设备，或包括第五方面提供的第一网络设备和第六方面提供的第二网络设备。
在本发明实施例中，通过将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；第一序列中的序列元素xi+l·P映射到第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；根据第一子载波组的子载波上的信号生成发送信号并发送生成的发送信号，从而使得第一序列对应的发送的时域信号和其它时域信号一起发送时满足单载波特性，能够保持信号传输的低峰均比，并降低第一序列对应的发送的时域信号与其它时域信号之间的干扰。
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1为应用本发明实施例的通信系统的架构示意图；
图2为本发明实施例一提供的传输信号的方法的流程示意图；
图3a和图3b为本发明实施例提供的一种频域资源映射的示意图；
图4为本发明实施例二提供的传输信号的方法的流程示意图；
图5为本发明实施例三提供的传输信号的方法的流程示意图；
图6为本发明实施例四提供的传输信号的方法的流程示意图；
图7为本发明实施例提供的另一种频域资源映射的示意图；
图8为本发明实施例五提供的传输信号的方法的流程示意图；
图9为图8所示实施例在执行步骤601之前的流程示意图；
图10a为本发明实施例提供一种第一网络设备的结构示意图；
图10b为本发明实施例提供另一种第一网络设备的结构示意图；
图11a为本发明实施例提供一种第二网络设备的结构示意图；
图11b为本发明实施例提供另一种第二网络设备的结构示意图。
具体实施方式
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
应理解，本发明实施例的技术方案可以应用于LTE架构，还可以应用于通用移动通信系统(Universal Mobile Telecommunications System，UMTS)陆地无线接入网(UMTS Terrestrial Radio Access Network，UTRAN)架构，或者GSM/增强型数据速率GSM演进(Enhanced Data Rate for GSM Evolution，EDGE)系统的无线接入网(GSM EDGE Radio Access Network，GERAN)架构。在UTRAN架构或/GERAN架构中，移动管理实体(Mobile Management Entity，MME)的功能由服务通用分组无线业务(General Packet Radio Service，GPRS)支持节点(Serving GPRS Support，SGSN)完成，信令网关(Signaling Gate Way，SGW)\公共数据网网关(Packet Data Network Gateway，PGW)的功能由网关GPRS支持节点(Gateway GPRS Support Node，GGSN)完成。本发明实施例的技术方案还可以应用于其他通信系统，例如公共陆地移动网络(Public Land Mobile Network，PLMN)系统，甚至未来的5G通信系统等，本发明实施例对此不作限定。
本发明实施例中的第一网络设备可以是用于与终端设备进行通信的设备，例如，可以是GSM系统或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者第一网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络侧设备或未来演进的PLMN网络中的网络设备等。
本发明实施例中的第二网络设备为终端设备，可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计 算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备等。
此外，本发明的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(Compact Disk，CD)、数字通用盘(Digital Versatile Disk，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(Erasable Programmable Read-Only Memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1为应用本发明实施例的通信系统的架构示意图。如图1所示，该通信系统100包括第一网络设备102，第一网络设备102可包括多个天线，例如天线104、106、108、110、112和114。另外，第一网络设备102可附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件(例如处理器、调制器、复用器、解调器、解复用器或天线等)。
第一网络设备102可以与第二网络设备116和第二网络设备122通信，还可以与其它的第二网络设备通信。第二网络设备116和122可以是例如蜂窝电话、智能电话、便携式电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位系统、PDA和/或用于在无线通信系统100上通信的任意其它适合设备。
如图1所示，第二网络设备116与天线112和114通信，其中天线112和114通过前向链路118向第二网络设备116发送信息，并通过反向链路120从第二网络设备116接收信息。此外，第二网络设备122与天线104和106通信，其中天线104和106通过前向链路124向第二网络设备122发送信息，并通过反向链路126从第二网络设备122接收信息。
例如，在频分双工(Frequency Division Duplex，FDD)系统中，例如，前向链路118可利用与反向链路120所使用的不同频带，前向链路124可利用与反向链路126所使用的不同频带。
再例如，在时分双工(Time Division Duplex，TDD)系统和全双工(Full Duplex)系统中，前向链路118和反向链路120可使用共同频带，前向链路124和反向链路126可使用共同频带。
被设计用于通信的每个天线(或者由多个天线组成的天线组)和/或区域称为第二网络设备102的扇区。例如，可将天线组设计为与第二网络设备102覆盖区域的扇区中的第二网络设备通信。在第一网络设备102通过前向链路118和124分别与第二网络设备116和122进行通信的过程中，第一网络设备102的发射天线可利用波束成形来改善前向链路118和124的信噪比。此外，与第一网络设备通过单个天线向它所有的第二网络设备发送信号的方式相比，在第一网络设备102利用波束成形向相关覆盖区域中随机分散的第二网络设备116和122发送信号时，相邻小区中的第二网络设备会受到较少的干扰。
第一网络设备102、第二网络设备116或第二网络设备122可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。 具体地，无线通信发送装置可获取(例如生成、从其它通信装置接收、或在存储器中保存等)要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含在数据的传输块(或多个传输块)中，传输块可被分段以产生多个码块。
应理解，本发明实施例可以应用于上行传输，例如图1中示出的120和126，也可以应用于下行传输，例如图1中示出的118和124。图1只是举例的简化示意图，通信系统中还可以包括其他网络设备，图1中未予以画出。
基于图1所示的通信系统的架构示意图，本发明实施例提供一种传输信号的方法，能够保持信号传输的低峰均比，并降低信号传输过程中信号之间的干扰。
下面将结合附图2-附图9对本发明实施例提供的传输信号的方法进行详细的介绍。
请参见图2，为本发明实施例一提供的传输信号的方法的流程示意图。需要说明的是，图2所示的实施例一主要介绍第一网络设备发送多路待发送信号中某路待发送信号的过程。
201，第一网络设备将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上。
其中，所述第一序列{x0,x1,...,xL·P-1}为所述多路待发送信号中的某路待发送信号对应的序列，可将所述第一序列{x0,x1,...,xL·P-1}对应的某路待发送信号称作第一待发送信号。所述第一待发送信号可能为数据信号，也可能为参考信号。所述参考信号可为上行参考信号(解调参考信号、探测参考信号)，也可为下行参考信号(小区专用参考信号、用户终端专用参考信号、多播/组播单频网络(Multicast Broadcast Single Frequency Network，MBSFN)参考信号)。所述数据信号可为携带控制信息的数据信号，也可为携带待传输数据信息的数据信号。所述控制信息可以是上行控制信道承载的上行控制信息，如物理上行链路控制信道(Physical Uplink Control Channel，PUCCH)上承载的上行控制信息；或下行控制信道承载的下行控制信息，如物理下行链路控制信道(Physical Downlink Control Channel，PDCCH)上承载的下行控制信息。所述待传输信息可以是广播信道承载的系统信息，如物理广播信道(Physical Broadcast Channel，PBCH)上承载的信息，或用于同步的同步信号，如主同步信号(Primary Synchronization Signal，PSS)或辅同步信号(Secondary Synchronization Signal，SSS)等。所述数据信号还可以是承载在上行数据信道上的信号，如承载在物理上行共享信道(Physical Uplink Shared Channel，PUSCH)上承载的信号；或承载在下行数据信道上的信号，如承载在物理下行共享信道(Physical Downlink Shared Channel，PDSCH)等。
若所述第一待发送信号为所述数据信号，所述数据信号可以是调制后的信号，例如正交相移键控(Quadrature Phase Shift Keying，QPSK)，16种符号的正交振幅调制(Quadrature Amplitude Modulation，QAM)，64种符号的QAM调制后的信号，则所述第一网络设备对所述第一待发送信号进行离散傅里叶变换(Discrete Fourier Transform，DFT)得到长度为P的序列{a0,a1,a2,...,aP-1}，根据所述第一序列中的序列元素xi+l·P与{a0,a1,a2,...,aP-1}的序列元素ai之间的关系得到所述第一序列，再将所述第一序列映射到所述第一子载波组的第一集合上。
若所述第一待发送信号为所述参考信号，则直接将{a0,a1,a2,...,aP-1}对应的第一序列 映射到所述第一子载波组的第一集合上而不需要进行离散傅里叶变换。
{a0,a1,a2,...,aP-1}可以为参考信号序列，还可以为所述参考信号序列与第一待发送信号的乘积的序列。可以理解的是，此时所述第一待发送信号为承载信息的信号，所述参考信号序列为已知信号的序列，例如LTE系统中的上行参考信号使用的序列。例如，所述参考信号序列与所述第一待发送信号的乘积的序列为(s·x0,s·x1,s·x2,...,s·xN-1)，其中s表示所述第一待发送信号，例如可以是调制后的信号，(x0,x1,x2,...,xN-1)表示长度为N的所述参考信号序列。
所述参考信号序列还可以为扎道夫-初(Zadoff-Chu)序列生成的序列。Zadoff-Chu序列有良好的自相关性，即任意的Zadoff-Chu序列与其循环移位n位后所得的自身除外的序列不相关，即相关值为零。具有相同长度的不同指标的Zadoff-Chu序列可能具有良好的互相关特性，互相关值接近于零。Zadoff-Chu序列具有低PAPR。Zadoff-Chu序列经过快速傅里叶变换(Fast Fourier Transformation，FFT)或逆快速傅里叶变换(Inverse Fast Fourier Transformation，IFFT)后，仍然为Zadoff-Chu序列。Zadoff-Chu序列可以表示为如下形式：
Figure PCTCN2017094107-appb-000005
当N是奇数时,n＝0,1,2,...,N-1；
Figure PCTCN2017094107-appb-000006
当N是偶数时，n＝0,1,2,...,N-1.
其中，N为Zadoff-Chu序列的长度；q为与N互质的自然数，且0＜q＜N，是Zadoff-Chu序列的指标，不同的q值对应不同的Zadoff-Chu序列；l是整数，是ZC序列的循环移位值。例如当N＝11时，q的取值可以为1～10。所述第一序列还可以为Zadoff-Chu序列生成的序列与所述第一待发送信号的乘积的序列，同理所述第一待发送信号为承载信息的信号，Zadoff-Chu序列生成的序列为已知信号的序列。
所述参考信号序列为Zadoff-Chu序列生成的序列，具体地还可以为Zadoff-Chu序列通过循环扩充或者截取生成的序列。
所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，所述第一子载波组的子载波个数为B，B≤L·K。cq的表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，例如，cq是所述B个子载波按照频率从高到低或者从低到高顺序的编号。所述第一子载波组包括连续等间隔分布的子载波的好处在于，可以获得更低的PAPR。其中，K为正整数，是用来确定所述第一序列的子载波编号的一个参数，多路待发送信号中每路待发送信号的序列长度叠加得到的序列总长小于等于K；L为正整数，L＞1，表示K的倍数，与所述多路待发送信号的路数有关，L可与所述多路待发送信号的路数相同。所述第一序列的序列长度P小于等于K，在P小于K时，用于给其它路信道留位，若多路待发送信号的路数较多，则P远远小于K所述第一集合的子载波数大于或等于所述第一序列的序列长度L·P。
其中，所述第一序列中的序列元素xi+l·P映射到子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L，其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部。子载波cr(i)+l·K所构成的集合即为所述第一集合，所述第一集合为所述第一子载波组中的一个集合，所述第一集合包含所述第一子载波组可包括的多个集合中的一个，具体集合的数量与频分复用、码分复用的多路待发送信号的路数有关。对于频分复用，多个集合内的子载波没有相同的；对于码分复用，多个集合内的子载波完全相同。
子载波cr(i)+l·K中的{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素，例如{r(i)},i＝0～P-1为{0,1,2,...,P-1}。其它路的待发送信号的序列对应的子载波可以是不同的连续的Q个元素。
子载波cr(i)+l·K中的{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数，即在序列{0,1,2,...,K-1}中每间隔Jr取一个元素，直至取P个元素，Jr＝1是其中一个特例。Jr＝L是另外一个特例，可以有更低的PAPR。
例如有L路信号，每路信号的序列长度为P，每路信号的序列的P个元素映射到所述第一子载波组的LP个子载波上，例如第一路信号映射到所述第一子载波组的第一集合，第二路信号映射到所述第二子载波组的第二集合等等。所述第一集合对应的子载波编号cq的下标q为{0,1,...,P-1；K,K+1,...,K+P-1；...；(L-1)K,(L-1)K+1,...,(L-1)K+P-1}，所述第二集合对应的子载波编号cq的下标q为{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}，同理，所述第三集合对应的子载波编号cq的下标q为{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}。
202，所述第一网络设备根据所述第一子载波组的子载波上的信号生成发送信号。
具体的，由于所述第一子载波组的子载波上的信号为频域上的信号，因此所述第一网络设备将所述第一子载波组的子载波上的信号变换到时域上，生成发送信号，所述发送信号为射频(Radio Frequency，RF)信号。可选的，所述第一网络设备对所述第一集合上的元素进行IFFT变换得到所述发送信号。
203，所述第一网络设备发送所述发送信号。
具体的，所述第一网络设备通过天线端口发送所述发送信号，即向所述第一网络设备覆盖范围内的第二网络设备发送射频信号。
具体的，所述第一子载波组的子载波个数为B，第一集合上的相位旋转因子为e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L，所述第一集合在所述第一子载波组中的子载波编号，为cr(i)+l·K,i＝0,1,...,P-1,l＝0,1,...,L-1，当cq＝q时，第一子载波组中的子载波编号为{q＝0,1,2,...,B-1},第一集合中的子载波编号为{r(i)+l·K,i＝0,1,...,P-1,l＝0,1,...,L-1}。其中，所述第一集合的相位旋转因子表示作用在所述第一序列上的相位旋转项。若L＝2，则u＝0或u＝1，当u＝0时，所述第一集合的所有子载波上的相位旋转因子为1；当u＝1时，所述第一集合的子载波cr(i)+l·K,i＝0,1,...,P-1,l＝0,1,...,L-1上的相位旋转因子为e2πj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L。所述第一网络设备通过在下行控制信息中携带所述第一序列占用的频域资源信息、该频域资源上的相位旋转因子、K、相位旋转因子相关信息u以及所述第一集合的子载波个数L·P，通知给第二网络设备。所述下行控制信息可以通过PDCCH信道发送，所述第二网络设备可从PDCCH信道中获取上述频域资源。
在本发明实施例中，通过将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq是所述B个子载波的按照频率从高到低或者从低到高顺序的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；第一序列中的序列元素xi+l·P映射到子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；根据第一子载波组的子载波上的信号生成发送信号并发送生成的发送信号，从而使得第一序列对应的发送的时域信号和其它时域信号一起发送时满足单载波特性，能够保持信号传输的低峰均比，并降低第一序列对应的发送的时域信号与其它时域信号之间的干扰。
请参见图3a和图3b，为本发明实施例提供的频域资源映射的流程示意图。需要说明的是，图3a和图3b举例介绍两个序列(第一序列和第二序列)在频域资源的映射过程。如图3a和图3b所示，第一序列映射到图3a和图3b黑色区域所表示的子载波，第二序列映射到图3a和图3b白色区域所表示的子载波，每个黑色区域表示P个子载波，每个白色区域表示Q个子载波。由图3a和图3b可知，映射后的子载波间隔排列，黑色区域与白色区域不存在交叠。L＝2，B≤2K，B＝P+Q+K，P+Q≤K，Q≠P或者Q＝P。在本发明实施例中，B、P、Q、L和K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
图3a和图3b所示为P+Q＜K的情况，并且所述第一序列和所述第二序列没有占用 的子载波上的信号缺省为0，由于两路信号频分正交可以提高传输的可靠性。其中，第一个黑色区域的子载波编号为Cr(i)，第一个黑色区域的子载波编号为Cr(i)+K；第一个白色区域的子载波编号为Cs(i)，第一个黑色区域的子载波编号为Cs(i)+K。黑色区域对应的2P个子载波是第一集合，白色区域对应的2Q个子载波是第二集合。图3a和图3b不同之处在于，图3a中B＝2K，包括斜线区域所示的子载波；图3b中B＜2K，不包括斜线区域所示的子载波。
请参见图4，为本发明实施例二提供的传输信号的方法的流程示意图。需要说明的是，图4所示的实施例二主要介绍第一网络设备发送两路待发送信号的过程。图4所示实施例中与图2所示实施例相同或相似的部分将不再赘述。
第一网络设备将第一序列和第二序列分别映射到第一子载波组中的第一集合和第二集合上，对所述第一集合和所述第二集合上的信号进行IFFT变换得到发送信号，并发送所述发送信号。
在本发明实施例中，所述第一序列和/或所述第二序列可以为数据信号对应的序列或者参考信号对应的序列，例如图2所示实施例中的序列中的一种或者两种，可将所述第一序列对应的某路待发送信号称作第一待发送信号，所述第二序列对应的某路待发送信号称作第二待发送信号。所述第二序列{y0,y1,...,yL·Q-1}的长度为L·Q，Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列。
其中，所述第一集合和所述第二集合中没有相同的子载波，此时为频分复用；所述第一集合和所述第二集合中的子载波完全相同，此时为码分复用。
对于码分复用，{a0,a1,...,aP-1}为
Figure PCTCN2017094107-appb-000007
n＝0,1,2,...,P，和/或{a0,a1,...,aP-1}为
Figure PCTCN2017094107-appb-000008
n＝0,1,2,...,Q，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。换言之，{a0,a1,...,aP-1}和/或{b0,b1,...,bQ-1}为序列en,n＝0,1,2,...,P的时域移位序列，即{a0,a1,...,aP-1}和{b0,b1,...,bQ-1}为同一序列的时域移位序列。
同理，子载波cs(i)+l·K中{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。子载波cs(i)+l·K中{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，Jr与Js可以相同也可以不相同，当Jr与Js相同时，例如都等于1。或者都等于L(例如当两路时L＝2，Jr＝Js＝2)，可以有Q＝P，当然也可以有Q≠P，这样可以灵活地进行资源分配，不要求两路信号占用的频率资源大小完全相同，而且保持很好的低PAPR特性。 其中间隔为Js用来表示第n个子载波和第n+Js个子载波之间的间隔，n是非负整数。例如第1个子载波和第2个子载波之间间隔为1。
请参见图7，为本发明实施例提供的另一种频域映射的示意图。图7所示的第一子载波组共有16个子载波，其中L＝2，K＝8。第一集合为图7中第二列标记灰色的8个子载波，第二集合为图7中第三列标记灰色的4个子载波，第一序列的长度为4，映射到第一集合的8个子载波，{r(i):i＝0,1,2,3}为{0,2,4,6}；第二序列的长度为2，映射到第二集合的4个子载波，{s(i):i＝0,1}为{1,5}。第一集合的子载波对应的编号ci的i为：{0,2,4,6；8,10,12,14}，第二集合的子载波对应的编号ci的i为：{1,5；9,13}。
一般的，如果所述第一序列对应的P和所述第二序列对应的Q不同，并且所述第一集合上和所述第二集合中每个子载波上的信号的功率相同，则对应的经过IFFT后的所述第一序列和所述第二序列对应的时域信号的平均功率就会因为子载波个数的不同而有差别，引起PAPR增加。因此，当所述第一序列的P和所述第二序列Q不同时，所述第一序列对应的信号占用的一个子载波上的功率和所述第二序列对应的信号占用的一个子载波上的功率的比值为Q/P，则PAPR不会因为功率配置的原因而增加。
一般的，本发明所有实施例中多路信号在相同的天线上发送，仍然保留低PAPR特性。
所述第一序列和所述第二序列映射到所述第一子载波组中的频分正交的资源上，使得彼此之间的干扰较小，能够提高传输的可靠性和第二网络设备的接收信号质量。
所述第二序列为参考信号序列，例如LTE系统中的参考信号的序列或Zadoff-Chu序列生成的序列，或为所述参考信号序列序列与第二待发送信号的乘积的序列。所述第一序列和所述第二序列对应的经过IFFT后的发送的时域信号在交叠位置上的元素不同时为非零元素。其中，交叠位置是指在同样包括M个元素的两个时域序列中，元素在序列中的位置相同。换而言之，所述第一序列和所述第二序列对应的经过IFFT发送的时域信号在同一时刻的元素不同时非零。这样，在时域上，相当于所述第一序列和所述第二序列对应的经过IFFT后的时域信号是时分复用的，从而使得在两个序列经过后续的DFT、IFFT等一系列变换及其它处理后，发送的信号具有低的PAPR。
所述第二序列映射的过程可与对所述第一序列映射的过程同时执行，也可在对所述第一序列映射的过程之前或之后执行。
请参见图5，为本发明实施例三提供的传输信号的方法的流程示意图。需要说明的是，图5所示的实施例三主要介绍第一网络设备发送两路待发送信号的过程。图5所示实施例中与图2或图4所示实施例相同或相似的部分将不再赘述。
第一网络设备对第一待发送信号和第二待发送信号进行傅里叶变换处理得到第一序列和第二序列，再将所述第一序列和所述第二序列分别映射到第一子载波组中的第一集合和第二集合上，对所述第一集合和所述第二集合上的元素进行IFFT变换得到发送信号，并发送所述发送信号。
在本发明实施例中，所述第一待发送信号和所述第二待发送信号均为数据信号，需要对其进行傅里叶变换得到所述第一序列和所述第二序列。
请参见图6，为本发明实施例四提供的传输信号的方法的流程示意图。需要说明的是，图6所示的实施例四主要介绍第一网络设备发送两路待发送信号的过程。图6所示实施例 中与图2或图4或图5所示实施例相同或相似的部分将不再赘述。
第一网络设备对第二待发送信号进行傅里叶变换处理得到第二序列，再将第一待发送信号对应的第一序列和所述第二序列分别映射到第一子载波组中的第一集合和第二集合上，对所述第一集合和所述第二集合上的元素进行IFFT变换得到发送信号，并发送所述发送信号。
在本发明实施例中，所述第一待发送信号为参考信号，所述第二待发送信号为数据信号，需要对所述第二待发送信号进行傅里叶变换得到所述第二序列。可推出，当多路待发送信号中存在至少一路数据信号时，所述第一网络设备对所述至少一路数据信号中每路数据信号进行离散傅里叶变换处理得到至少一个序列，再对所述至少一个序列中每个序列映射到所述第一子载波组上。
基于图3a和图3b，以及图4-图6所示的实施例，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素，则r(i)＝0,1,...,P-1，s(i)＝P,P+1,...,P+Q-1，P+Q≤K。其中，P+Q＝K的情况是连续的块状频分复用。
基于图4-图6所示的实施例，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，Jr＝Js＝1，P＝Q，则r(i)＝2,4,...,2(P-1)，s(i)＝1,3,...,2P-1，P+Q≤K。其中，P+Q＝K的情况是连续的梳子状频分复用。
对于所述第一集合和所述第二集合中的子载波完全相同，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素，P＝Q的情况，r(i)＝s(i)＝0,1,...,P-1，P+Q≤K。
基于图4-图6所示的实施例，可推出，当存在多于两路的待发送信号时，可依照对所述第二序列的处理方法对其它待发送信号进行传输处理，实现多个信道复用。例如，存在第三序列时，第三序列{z0,z1,z2,...,zL·R-1}的长度为L·R，R≤K，所述第三序列中的序列元素zi+l·R映射到子载波cw(i)+l·K，zi+l·R＝di·e2πvj(w(i)+l·K)/(L·K)或zi+l·R＝di·e2πvj·l/L，其中，i为变量，i＝0,1,2,...,R-1，w(i)∈{0,1,2,...,K-1}，对于不同的i值，w(i)的取值不同，l为正整数，l＝0～L-1，x∈{0,1,...,L-1}，x≠u且x≠v，j为复数的虚部；{d0,d1,...,dR-1}是长度为R的序列。
所述第三集合和所述第二集合中没有相同的子载波，所述第三集合和所述第一集合中没有相同的子载波，使得彼此之间的干扰较小，能够提高传输的可靠性和第二网络设备的接收信号质量。或，所述第一集合和所述第二集合中的子载波完全相同，所述第三集合和所述第一集合中的子载波完全相同，实现码分复用。
在本发明所有实施例中(包括后面的实施例)，{r(i)},i＝0～P-1可以是{0,1,2,...,K-1}中连续的P个元素，与申请号为CN201610311497.8的专利申请中的方案不同，CN201610311497.8中多路信号是梳妆交错的。或者，在本发明实施例中，当L＝2时，可以P+Q＜K，与申请号为CN201610311497.8的专利申请中的方案不同，CN201610311497.8中P+Q＝K。或者，在本发明所有实施例中，第一网络设备或者第二网络设备可以发送或者接收控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。特别是即使第一序列的第一集合的资源和第二序列的第二集合的资源梳状频分复用，即{r(i)},i＝0～P-1为{0,2,...,2P-2}，{s(i)},i＝0～Q-1为{1,3,...,2Q-1}，或者{r(i)},i＝0～P-1为{1,3,...,2P-1}，{s(i)},i＝0～Q-1为{0,2,...,2Q-2}。与申请号为CN201610311497.8的专利申请中的方案不同之处在于通过控制信令通知旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、相位旋转因子相关信息u中的至少一种。本发明实施例中，第一网络设备或者第二网络设备发送或者接收的控制信令中包括了旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、相位旋转因子相关信息u中的至少一种。其中的第一序列的值u和第二序列的值v是不同的，例如L＝2时，u＝0则就需要v＝1才能保证u,v取值不同，但是也可以u＝1,v＝0，同时保证u,v取值不同。因此，通过控制信令通知u的取值，例如是0还是1，就可以选择使用u＝0,v＝1，或者u＝1,v＝0。例如可以通知设备1使用u＝0,v＝1，设备2使用u＝1,v＝0。这样虽然两个设备使用的频率资源完全重叠，但是由于u,v的取值一个是u＝0,v＝1，另外一个是u＝1,v＝0，也可以保证一定的正交性，从而接收机能够区分两个设备的发送信号。
请参见图8，为本发明实施例五提供的传输信号的方法的流程示意图。需要说明的是，图8所示的实施例五主要介绍第二网络设备接收多路待发送信号中某路待发送信号的过程。
601，第二网络设备从第一子载波组的第一集合上接收第一序列对应的第一接收信号。
其中，所述第一子载波组、所述第一集合以及所述第一序列的描述可参见上文第一网络设备中相应的描述，在此不再赘述。所述第一序列对应的接收信号为所述第一网络设备根据所述第一序列映射到所述第一集合上的信号生成的信号，即在存在至少一个序列的情况下，所述第一序列对应的接收信号为所述第一网络设备根据所述第一子载波组上的子载波上的信号生成的发送信号的一部分，即所述发送信号的多个序列中每个序列对应了一个接收信号。
请参见图9，为图8所示实施例在执行步骤601之前的流程示意图。如图9所示，在执行图8所示的步骤601之前，第二网络设备对接收的信号进行快速傅里叶变换FFT处理，得到第一子载波组上子载波的接收信号。
602，所述第二网络设备对所述第一接收信号进行信号处理。
具体的，信号处理，对于数据信号而言具体可以包括对第一接收信号进行均衡等，对于参考信号而言具体可以包括对第一接收信号进行信道估计处理等，对于承载信息的序列而言包括均衡处理。所述第二网络设备对所述第一接收信号进行信号处理，还可以包括：所述第二网络设备对所述第一接收信号进行离散傅里叶逆变换IDFT处理得到接收到的第一序列，进行解调处理。
当所述第一接收信号为承载信息的序列时,信号处理进一步包括对第一接收信号进行序列的相关处理和解调处理。
与所述第一网络设备对应，除了上文所描述的所述发送信号外，所述第二网络设备还可以从所述第一子载波组的子载波上接收第二序列对应的第二接收信号，甚至第三序列对应的第三接收信号，甚至更多的序列对应的接收信号。由于所述第一网络设备发送的多路待发送信号符合单载波特性，因此第二网络设备接收的接收信号，一方面在发射方能够保持信号的低峰均比，提高发射信号平均功率，从而保证在接收方有好的接收信噪比，另一方面多路待发送信号在映射过程中不存在交叠，使得所述第二网络设备接收的接收信号之间干扰较小。
上述主要从网络设备的角度对本发明实施例的方案进行了介绍。可以理解的是，各个网络设备，例如第一网络设备，第二网络设备等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的模块及算法步骤，本发明能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
本发明实施例可以根据上述方法示例对第一网络设备，第二网络设备等进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本发明实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的模块的情况下，图10a示出了上述实施例中所涉及的第一网络设备的一种可能的结构示意图。第一网络设备700包括：处理模块701和发送模块702。处理模块701用于对第一网络设备的动作进行控制管理，例如，处理模块701用于支持第一网络设备执行图2中的过程201和202，和/或用于本文所描述的技术的其它过程。发送模块702用于支持第一网络设备与第二网络设备或其他网络实体的通信。第一网络设备还可以包括存储模块703，用于存储第一网络设备的程序代码和数据。
其中，处理模块701可以是处理器或控制器，例如可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电 路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。发送模块702可以是收发器、收发电路或通信接口等。存储模块703可以是存储器。
当处理模块701为处理器，发送模块702为收发器，存储模块703为存储器时，本发明实施例所涉及的第一网络设备可以为图10b所示的第一网络设备。
参阅图10b所示，该第一网络设备710包括：处理器712、收发器713、存储器711。可选的，第一网络设备710还可以包括总线714。其中，收发器713、处理器712以及存储器711可以通过总线714相互连接；总线714可以是外设部件互连标准(Peripheral Component Interconnect，简称PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，简称EISA)总线等。所述总线714可以分为地址总线、数据总线、控制总线等。为便于表示，图10b中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
在采用集成的模块的情况下，图11a示出了上述实施例中所涉及的第二网络设备的一种可能的结构示意图。第二网络设备800包括：接收模块801和处理模块802。处理模块802用于对第二网络设备的动作进行控制管理，例如，处理模块802用于支持第二网络设备执行图8中的过程602，和/或用于本文所描述的技术的其它过程。接收模块801用于支持第二网络设备与第一网络设备或其他网络实体的通信。第二网络设备还可以包括存储模块803，用于存储第二网络设备的程序代码和数据。
其中，处理模块802可以是处理器或控制器，例如可以是中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。接收模块801可以是收发器、收发电路或通信接口等。存储模块803可以是存储器。
当处理模块802为处理器，接收模块801为收发器，存储模块803为存储器时，本发明实施例所涉及的第二网络设备可以为图11b所示的第二网络设备。
参阅图11b所示，该第二网络设备810包括：处理器812、收发器813、存储器811。可选的，第二网络设备810还可以包括总线814。其中，收发器813、处理器812以及存储器811可以通过总线814相互连接；总线814可以是外设部件互连标准总线或扩展工业标准结构总线等。所述总线814可以分为地址总线、数据总线、控制总线等。为便于表示，图11b中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
结合本发明实施例公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件 模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、只读存储器(Read Only Memory，ROM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD～ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本发明实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述的具体实施方式，对本发明实施例的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明实施例的具体实施方式而已，并不用于限定本发明实施例的保护范围，凡在本发明实施例的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本发明实施例的保护范围之内。

Claims (50)

  1. 一种传输信号的方法，其特征在于，包括：
    第一网络设备将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
    所述第一网络设备根据所述第一子载波组的子载波上的信号生成发送信号；
    所述第一网络设备发送所述发送信号。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备将长度为L·Q的第二序列映射到{y0,y1,...,yL·Q-1}所述第一子载波组的包括L·Q个子载波的第二集合上；Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列。
  3. 根据权利要求2所述的方法，其特征在于，所述第一集合和所述第二集合中没有相同的子载波，或所述第一集合和所述第二集合中的子载波完全相同。
  4. 根据权利要求1或2所述的方法，其特征在于，所述B、所述P、所述Q、
    所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
  5. 根据权利要求1所述的方法，其特征在于，所述第一网络设备将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上之前，还包括：
    第一网络设备对第一待发送信号{h0,h1,...,hP-1}进行离散傅里叶变换DFT得到{a0,a1,a2,...,aP-1}。
  6. 根据权利要求1所述的方法，其特征在于，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序列与所述第一待发送信号的乘积的序列。
  7. 根据权利要求6所述的方法，其特征在于，所述参考信号序列为Zadoff-Chu序列生成的序列，或为LTE参考信号的序列。
  8. 根据权利要求1或2所述的方法，其特征在于，{a0,a1,a2,...,aP-1}为
    Figure PCTCN2017094107-appb-100001
    n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
    Figure PCTCN2017094107-appb-100002
    n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。
  9. 根据权利要求1所述的方法，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素。
  10. 根据权利要求2所述的方法，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
  11. 根据权利要求1所述的方法，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数。
  12. 根据权利要求2所述的方法，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，其中，Js为正整数。
  13. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备发送或者接收控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。
  14. 一种传输信号的方法，其特征在于，包括：
    第二网络设备从第一子载波组的包括L·P个子载波的第一集合上接收第一序列对应的第一接收信号；所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号；所述第一序列{x0,x1,...,xL·P-1}为承载在所述第一集合的子载波上的长度为L·P的序列，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
    所述第二网络设备对所述第一接收信号进行信号处理。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备从所述第一子载波组的包括L·Q个子载波的第二集合上接收第二序列对应的第二接收信号；所述第二序列{y0,y1,...,yL·Q-1}为承载在所述第二集合上的子载波上的长度为L·Q的序列，Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1} 是长度为Q的序列；
    所述第二网络设备对所述第二接收信号进行信号处理。
  16. 根据权利要求15所述的方法，其特征在于，所述第一集合和所述第二集合中没有相同的子载波，或所述第一集合和所述第二集合中的子载波完全相同。
  17. 根据权利要求14或15所述的方法，其特征在于，所述B、所述P、所述Q、所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
  18. 根据权利要求14所述的方法，其特征在于，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序列与第一待发送信号{h0,h1,...,hP-1}的乘积的序列。
  19. 根据权利要求18所述的方法，其特征在于，所述参考信号序列为Zadoff-Chu序列生成的序列，或为LTE参考信号的序列。
  20. 根据权利要求14或15所述的方法，其特征在于，{a0,a1,...,aP-1}为
    Figure PCTCN2017094107-appb-100003
    n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
    Figure PCTCN2017094107-appb-100004
    n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。
  21. 根据权利要求14所述的方法，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素。
  22. 根据权利要求15所述的方法，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
  23. 根据权利要求14所述的方法，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数。
  24. 根据权利要求15所述的方法，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，其中，Js为正整数。
  25. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备接收或者发送控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。
  26. 一种第一网络设备，其特征在于，包括：
    处理模块，用于将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上，所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1} 是长度为P的序列；
    所述处理模块，还用于根据所述第一子载波组的子载波上的信号生成发送信号；
    发送模块，用于发送所述发送信号。
  27. 根据权利要求26所述的第一网络设备，其特征在于，
    所述处理模块，还用于将长度为L·Q的第二序列{y0,y1,...,yL·Q-1}映射到所述第一子载波组的包括L·Q个子载波的第二集合上；Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列。
  28. 根据权利要求26所述的第一网络设备，其特征在于，所述第一集合和所述第二集合中没有相同的子载波，或所述第一集合和所述第二集合中的子载波完全相同。
  29. 根据权利要求26所述的第一网络设备，其特征在于，所述B、所述P、所述Q、所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
  30. 根据权利要求26所述的方法，其特征在于，所述处理模块，还用于将长度为L·P的第一序列{x0,x1,...,xL·P-1}映射到第一子载波组的包括L·P个子载波的第一集合上之前，对第一待发送信号{h0,h1,...,hP-1}进行离散傅里叶变换DFT得到{a0,a1,a2,...,aP-1}。
  31. 根据权利要求26所述的第一网络设备，其特征在于，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序列与所述第一待发送信号的乘积的序列。
  32. 根据权利要求31所述的第一网络设备，其特征在于，所述参考信号序列为Zadoff-Chu序列生成的序列，或为LTE参考信号的序列。
  33. 根据权利要求26或27所述的第一网络设备，其特征在于，{a0,a1,...,aP-1}为
    Figure PCTCN2017094107-appb-100005
    n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
    Figure PCTCN2017094107-appb-100006
    n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。
  34. 根据权利要求26所述的第一网络设备，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素。
  35. 根据权利要求27所述的第一网络设备，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
  36. 根据权利要求26所述的第一网络设备，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数。
  37. 根据权利要求27所述的第一网络设备，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，其中，Js为正整数。
  38. 根据权利要求26所述的第一网络侧设备，其特征在于，所述发送模块还用于发送或者接收控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或 ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。
  39. 一种第二网络设备，其特征在于，包括：
    接收模块，用于从第一子载波组的包括L·P个子载波的第一集合上接收第一序列对应的第一接收信号；所述第一子载波组包括连续等间隔分布的B个子载波{c0,c1,...,cB-1}，cq表示所述第一子载波组内连续等间隔分布的第q个子载波的编号；所述第一序列{x0,x1,...,xL·P-1}为承载在所述第一集合的子载波上的长度为L·P的序列，B≤L·K，P≤K，B、P、K、L均为正整数，L＞1；所述第一序列中的序列元素xi+l·P映射到所述第一集合的子载波cr(i)+l·K，xi+l·P＝ai·e2πuj(r(i)+l·K)/(L·K)或xi+l·P＝ai·e2πuj·l/L；其中，i为变量，i＝0,1,2,...,P-1，r(i)∈{0,1,2,...,K-1}，对于不同的i值，r(i)的取值不同，l为正整数，l＝0～L-1，u∈{0,1,...,L-1}，j为复数的虚部；{a0,a1,...,aP-1}是长度为P的序列；
    处理模块，用于对所述第一接收信号进行信号处理。
  40. 根据权利要求27所述的第二网络设备，其特征在于，
    所述接收模块，还用于从所述第一子载波组的包括L·Q个子载波的第二集合上接收第二序列对应的第二接收信号；所述第二序列{y0,y1,...,yL·Q-1}为承载在所述第二集合上的子载波上的长度为L·Q的序列，Q≤K，Q为正整数；所述第二序列中的序列元素yi+l·Q映射到所述第二集合的子载波cs(i)+l·K，yi+l·Q＝bi·e2πvj(s(i)+l·K)/(L·K)或yi+l·Q＝bi·e2πvj·l/L；其中，i为变量，i＝0,1,2,...,Q-1，s(i)∈{0,1,2,...,K-1}，对于不同的i值，s(i)的取值不同，l为正整数，l＝0～L-1，v∈{0,1,...,L-1}，v≠u，j为复数的虚部；{b0,b1,...,bQ-1}是长度为Q的序列；
    所述处理模块，还用于对所述第二接收信号进行信号处理。
  41. 根据权利要求40所述的第二网络设备，其特征在于，所述第一集合和所述第二集合中没有相同的子载波，或所述第一集合和所述第二集合中的子载波完全相同。
  42. 根据权利要求39或40所述的第二网络设备，其特征在于，所述B、所述P、所述Q、所述L和所述K满足如下关系：B＝(L-1)·K+P+Q，P+Q≤K。
  43. 根据权利要求39所述的第二网络设备，其特征在于，{a0,a1,a2,...,aP-1}为参考信号序列，或为所述参考信号序列与第一待发送信号的乘积的序列。
  44. 根据权利要求43所述的第二网络设备，其特征在于，所述参考信号序列为Zadoff-Chu序列生成的序列，或为LTE参考信号的序列。
  45. 根据权利要求39或40所述的第二网络设备，其特征在于，{a0,a1,...,aP-1}为
    Figure PCTCN2017094107-appb-100007
    n＝0,1,2,...,P-1，和/或{b0,b1,...,bQ-1}为
    Figure PCTCN2017094107-appb-100008
    n＝0,1,2,...,Q-1，其中，en,n＝0,1,2,...,P-1为序列，P＝Q，α1，α2为实数。
  46. 根据权利要求39所述的第二网络设备，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中连续的P个元素。
  47. 根据权利要求40所述的第二网络设备，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中连续的Q个元素。
  48. 根据权利要求39所述的第二网络设备，其特征在于，{r(i)},i＝0～P-1为{0,1,2,...,K-1}中间隔为Jr的连续的P个元素，其中，Jr为正整数。
  49. 根据权利要求40所述的第二网络设备，其特征在于，{s(i)},i＝0～Q-1为{0,1,2,...,K-1}中间隔为Js的连续的Q个元素，其中，Js为正整数。
  50. 根据权利要求39所述的第二网络设备，其特征在于，所述接收模块还用于接收或者发送控制信令，所述控制信令用于指示所述第一序列映射到所述第一集合上的相位旋转参数信息，所述相位旋转参数信息包括所述K、旋转因子信息e2πuj(r(i)+l·K)/(L·K)或ai·e2πuj·l/L、所述第一集合的子载波个数L·P、相位旋转因子相关信息u中的至少一种。
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