WO2021008177A1 - 信号发送方法及装置、存储介质、用户终端 - Google Patents

信号发送方法及装置、存储介质、用户终端 Download PDF

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Publication number
WO2021008177A1
WO2021008177A1 PCT/CN2020/084827 CN2020084827W WO2021008177A1 WO 2021008177 A1 WO2021008177 A1 WO 2021008177A1 CN 2020084827 W CN2020084827 W CN 2020084827W WO 2021008177 A1 WO2021008177 A1 WO 2021008177A1
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Prior art keywords
signal
phase rotation
peak
average ratio
component carrier
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PCT/CN2020/084827
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English (en)
French (fr)
Inventor
栾亦夫
李开
扈立超
李俊强
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锐迪科创微电子（北京）有限公司
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Publication of WO2021008177A1 publication Critical patent/WO2021008177A1/zh
Priority to US17/576,244 priority Critical patent/US11929861B2/en

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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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2614—Peak power aspects
    • H04L27/2621—Reduction thereof using phase offsets between subcarriers
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the present invention relates to the field of communication technology, in particular to a signal sending method and device, storage medium, and user terminal.
  • the electric power private network has 10 single frequency points and 15 pairs of duplex frequency points allocated by the State Radio Management Committee in the 230MHz frequency band, each frequency point has a bandwidth of 25kHz, discretely and unequally spaced in 223MHz ⁇ 226MHz and 229MHz ⁇ 233MHz.
  • Carrier aggregation technology is required for high-rate data transmission, and multiple discrete frequency points are jointly used.
  • carrier aggregation containing up to 16 component carriers is required.
  • the number of component carriers (CC) is far more common.
  • Wireless networks for example, up to 5 in LTE-Advanced).
  • PAPR peak-to-average power ratio
  • the technical problem solved by the present invention is to provide a signal transmission method and device, storage medium, and user terminal, which can reduce the peak-to-average ratio.
  • an embodiment of the present invention provides a signal transmission method, which is characterized by including the following steps: determining a plurality of component carrier baseband signals; selecting a plurality of phase rotation factors, and each phase rotation factor is related to the component carrier
  • the baseband signals correspond one-to-one, and the number of selections is recorded plus one; the signal to be transmitted and its peak-to-average ratio are determined according to the phase rotation factor and the component carrier baseband signal; if the peak-to-average ratio is greater than or equal to the preset threshold, and If the number of selections does not reach the preset number of times, reselect the phase rotation factor and re-determine the signal to be sent and its peak-to-average ratio until the peak-to-average ratio is less than the preset threshold or the number of selections reaches the preset number of times;
  • determining the baseband signals of multiple component carriers includes: determining the original baseband signals of the multiple component carriers; grouping the original baseband signals of the multiple component carriers, and the number of the original baseband signals of each group of component carriers is the same; The original baseband signal of each component carrier is up-sampled and moved to the corresponding carrier aggregation baseband frequency, and then pre-combined to serve as a single component carrier baseband signal.
  • N phase is used to indicate the number of phase rotation factors
  • i is used to indicate the index of the selected phase rotation factor in the set of phase rotation factors
  • k is used to represent the number of selections
  • c is used to represent the sequence number of the component carrier baseband signal.
  • n is used to represent the preset number of times
  • N CC is used to represent the number of component carrier baseband signals
  • D is used to represent the phase combination downsampling factor, D>1
  • D is a positive integer.
  • the signal sending method further includes: receiving a phase rotation on instruction; wherein the phase rotation on instruction is used to instruct to enable the selection of the phase rotation factor to The signal to be sent is processed.
  • the signal sending method further includes: sending a phase rotation factor corresponding to each component carrier baseband signal.
  • an embodiment of the present invention provides a signal sending device, which is characterized by comprising: a signal determining module, adapted to determine multiple component carrier baseband signals; a selection module, adapted to select multiple phase rotation factors, each Each phase rotation factor corresponds to the component carrier baseband signal one-to-one, and the number of selections is recorded plus one; the peak-to-average ratio determination module is adapted to determine the signal to be transmitted and its peak value according to the phase rotation factor and the component carrier baseband signal The reselection module is adapted to reselect the phase rotation factor and re-determine the signal to be sent and its peak-to-average ratio when the peak-to-average ratio is greater than or equal to a preset threshold, and the number of selections does not reach the preset number of times, Until the peak-to-average ratio is less than the preset threshold or the number of selections reaches the preset number of times; the sending module is adapted to send the signal to be sent; wherein, it is determined
  • an embodiment of the present invention provides a storage medium having a computer instruction stored thereon, and the computer instruction executes the steps of the signal sending method when the computer instruction runs.
  • an embodiment of the present invention provides a user terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and when the processor runs the computer instructions Perform the steps of the signal sending method described above.
  • the phase rotation factor corresponding to the component carrier baseband signal is selected one-to-one by single or multiple times, and the peak-to-average ratio of the signal to be transmitted is calculated each time until the peak-to-average ratio is less than the preset The threshold or the number of selections reaches a preset number of times, and then it is sent.
  • the original baseband signals of multiple component carriers are grouped, and then the original baseband signals of each group of component carriers are pre-combined after being upsampled and moved to the corresponding carrier aggregation baseband frequency (such as Addition operation), can effectively reduce the number of component carrier operations, thereby improving the operation efficiency.
  • Fig. 1 is a flowchart of a signal sending method in an embodiment of the present invention
  • FIG. 2 is a flowchart of a specific implementation of step S11 in FIG. 1;
  • Figure 3 is a schematic diagram of a working scenario of a signal sending method in an embodiment of the present invention.
  • Fig. 4 is a schematic structural diagram of a signal sending device in an embodiment of the present invention.
  • the signal peak-to-average ratio will inevitably increase, resulting in the peak-to-average ratio signal when passing through nonlinear devices.
  • the power amplifier will be affected by stronger non-linear distortion, the error vector amplitude of the signal and the adjacent channel leakage ratio and other indicators will become worse, and the system performance will decrease.
  • the 230MHz frequency band with a total of 280 discrete frequency points it is very important to ensure sufficient ACLR. Therefore, in practical applications, power back-off is needed to offset the impact of the peak-to-average ratio, but this will reduce the working efficiency of the power amplifier and reduce the terminal coverage.
  • the commonly used methods of peak-to-average ratio suppression include: signal predistortion, such as peak windowing and peak clipping.
  • the basic principle is to directly process the sampling points whose amplitude exceeds the set threshold to reduce the peak-to-average ratio. Methods such as windowing or filtering are used to reduce the distortion of the signal. This type of method is easy to implement and can achieve a better peak-to-average ratio suppression effect, but it often makes the signal quality worse and affects EVM and ACLR. And probability, such as selective mapping and partial transmission sequence methods.
  • the basic principle is to generate several versions of the transmission signal by phase rotation on each subcarrier or subcarrier group, and select the version with the smallest peak-to-average ratio to transmit to achieve suppression The effect of peak-to-average ratio.
  • the inventor found that although the existing technology can basically maintain signal quality, it has high computational complexity, high signaling overhead, requires special processing by the receiver, and a series of methods based on the above methods for the calculation and peak-to-average ratio suppression effect. Improved optimization methods will increase additional costs and increase the complexity of improvement.
  • the phase rotation factor corresponding to the component carrier baseband signal is selected one-to-one by single or multiple times, and the peak-to-average ratio of the signal to be transmitted is calculated each time until the peak-to-average ratio is less than the preset The threshold or the number of selections reaches a preset number of times, and then it is sent.
  • this process is not easy to distort the signal, and it is not easy to affect the EVM and ACLR of the signal, and can be used in conjunction with conventional signal predistortion peak-to-average ratio suppression technology, which helps to further reduce the peak-to-average ratio.
  • FIG. 1 is a flowchart of a signal sending method in an embodiment of the present invention.
  • the signal sending method may include step S11 to step S15:
  • Step S11 Determine multiple component carrier baseband signals
  • Step S12 Select multiple phase rotation factors, each phase rotation factor corresponds to the component carrier baseband signal one-to-one, and record the number of times of selection plus one;
  • Step S13 Determine the signal to be sent and its peak-to-average ratio according to the phase rotation factor and the component carrier baseband signal;
  • Step S14 If the peak-to-average ratio is greater than or equal to the preset threshold, and the number of selections does not reach the preset number of times, reselect the phase rotation factor and re-determine the signal to be sent and its peak-to-average ratio until the peak-to-average ratio Less than the preset threshold or the number of selections reaches the preset number of times;
  • Step S15 Send the signal to be sent
  • determining the signal to be transmitted and its peak-to-average ratio according to the phase rotation factor and the component carrier baseband signal includes: for each component carrier baseband signal, after upsampling is moved to the corresponding carrier aggregation baseband frequency, and the selected phase The twiddle factors are multiplied to obtain multiple carrier signals; the multiple carrier signals are added together to obtain the signal to be sent, and then the peak-to-average ratio of the signal to be sent is determined.
  • multiple component carrier baseband signals can be determined.
  • a CP-based SC-FDMA signal can be used for the uplink of the electric power wireless private network.
  • a time slot is 2 ms and includes 6 symbols, including 1 reference symbol.
  • FIG. 2 is a flowchart of a specific implementation of step S11 in FIG. 1.
  • the step of determining multiple component carrier baseband signals may include step S21 to step S23, and each step will be described below.
  • step S21 the original baseband signals of multiple component carriers are determined.
  • the original baseband signal may be the aforementioned CP-based SC-FDMA signal, which may be received by the terminal, or may be generated by the terminal.
  • step S22 the original baseband signals of the multiple component carriers are grouped, and the number of original baseband signals of each group of component carriers is the same.
  • component carriers can be grouped, that is, N group component carriers share a phase factor, and the number of phase combinations can be greatly reduced.
  • the original baseband signals of the multiple component carriers are grouped, for example, when the number of component carriers is greater than or equal to 12, the multiple members The original baseband signal of the carrier is grouped.
  • the number of original baseband signals of each component carrier should not be too small, otherwise it will be difficult to achieve the effect; the number of original baseband signals of each component carrier should not be too large, otherwise the peak-to-average ratio suppression performance will be reduced.
  • the number of original baseband signals of each group of component carriers can be selected from 2 to 4.
  • step S23 the original baseband signal of each group of component carriers is up-sampled and moved to the corresponding carrier aggregation baseband frequency, and then pre-combined to serve as a single component carrier baseband signal.
  • the original baseband signal of each group of component carriers may be up-sampled and moved to the corresponding carrier aggregation baseband frequency, and then an addition operation may be performed to realize pre-combination.
  • the number of component carrier operations can be effectively reduced. Thereby improving computing efficiency.
  • step S12 multiple phase rotation factors can be selected, and each phase rotation factor corresponds to the component carrier baseband signal one-to-one, and the number of selections plus one is recorded.
  • phase rotation with the component carrier baseband signal as a frequency domain unit can avoid the need to perform IFFT operation after the traditional selective mapping method performs phase rotation on each subcarrier, and at the same time greatly reduces the number of phase rotation combinations. Taking several time slots as time-domain units for phase rotation, the reference symbol and other data symbols undergo the same phase rotation, allowing the receiver to directly demodulate without additional processing.
  • phase rotation factors it is possible to extract among multiple phase rotation factors. That is, directly extract a part from all possible phase combinations for combination to reduce the amount of calculation. Specifically, there is a high probability that there are multiple phase combinations that can make the signal after carrier aggregation reach the minimum or close to the minimum value of PAPR, so there is no need to try all phase combinations.
  • phase rotation factor can be selected from the phase set
  • N phase is used to indicate the number of phase rotation factors
  • It is used to indicate a set of phase rotation factors
  • i is used to indicate the index of the selected phase rotation factor in the set of phase rotation factors.
  • k is used to represent the number of selections
  • C is used to represent the sequence number of the component carrier baseband signal.
  • mod stands for remainder operation
  • ceil stands for round up operation.
  • N phase is the number of phase rotation factors.
  • N phase is 2 or 4
  • ⁇ 2 ⁇ 1,-1 ⁇
  • ⁇ 4 ⁇ 1,i,-1,-i ⁇ , ⁇ 2 and ⁇ 4 can be The multiplication is replaced by changing the positive and negative values and swapping the real and imaginary parts, which is easy to implement in hardware.
  • the signal to be sent and its peak-to-average ratio may be determined according to the phase rotation factor and the component carrier baseband signal.
  • the step of determining the signal to be transmitted and its peak-to-average ratio according to the phase rotation factor and the component carrier baseband signal may include: for each component carrier baseband signal, after up-sampling and moving to the corresponding carrier aggregation baseband frequency, and The selected phase rotation factors are multiplied to obtain multiple carrier signals; the multiple carrier signals are added together to obtain the signal to be sent, and then the peak-to-average ratio of the signal to be sent is determined.
  • the high peak caused by the in-phase superposition of the component carrier signals can be eliminated as much as possible.
  • this process basically does not distort the signal, and does not affect the EVM and ACLR of the signal. And after this method, you can continue to use other signal predistortion peak-to-average ratio suppression techniques to further reduce PAPR.
  • step S14 if the peak-to-average ratio is greater than or equal to the preset threshold, and the number of selections does not reach the preset number of times, the phase rotation factor is reselected and the signal to be sent and its peak-to-average ratio are re-determined until The peak-to-average ratio is less than the preset threshold or the number of selections reaches the preset number of times.
  • n is used to represent the preset number of times
  • N CC is used to represent the number of component carrier baseband signals
  • D is used to represent the phase combination downsampling factor, D>1
  • D is a positive integer.
  • the peak-to-average ratio suppression effect is basically the same as that of random sampling from all phase combinations.
  • D is large, the peak-to-average ratio suppresses The effect is limited.
  • the phase rotation factor used by each component carrier Only after selecting the smallest PAPR, the corresponding phase combination can be generated instantly according to the number of attempts, saving hardware storage space.
  • step S15 the signal to be sent is sent.
  • the phase rotation factor corresponding to the component carrier baseband signal is selected one-to-one by single or multiple times, and the peak-to-average ratio of the signal to be transmitted is calculated each time until the peak-to-average ratio is less than the preset The threshold or the number of selections reaches a preset number of times, and then it is sent.
  • this process is not easy to distort the signal, and it is not easy to affect the EVM and ACLR of the signal, and can be used in conjunction with conventional signal predistortion peak-to-average ratio suppression technology, which helps to further reduce the peak-to-average ratio.
  • Fig. 3 is a schematic diagram of a working scenario of a signal sending method in an embodiment of the present invention. Taking an example of the number of original baseband signals of each group of component carriers being two, the method may include steps S31 to S36:
  • step S31 the original baseband signals of multiple component carriers can be determined, and then the original baseband signals of the multiple component carriers are grouped, and the original baseband signals of each group of component carriers are up-sampled and moved to the corresponding carrier aggregation baseband frequency After that, pre-combination is performed, for example, an addition operation.
  • the original baseband signal may include a CC 1 baseband signal, a CC 2 baseband signal, ... CC x-1 baseband signal to CC x baseband signal.
  • a phase rotation factor can be selected to multiply the component carrier baseband signal.
  • step S33 the multiple carrier signals are added together.
  • step S34 PAPR is calculated.
  • the multiplication operation, the upsampling frequency shift, the addition operation, and the calculation of the PAPR in the above steps can all be performed by an appropriate operation method.
  • the specific operation method is not limited.
  • step S35 it is judged whether the PAPR is less than the preset threshold or the number of selections reaches the preset number of times.
  • step S36 can be executed, and when the judgment result is no, step S32 can be returned to execute step S32 to reselect the phase rotation factor And re-determine the signal to be sent and its peak-to-average ratio.
  • step S36 a signal to be sent is sent.
  • step S31 to step S36 please refer to the foregoing and the description of FIGS. 1 to 2 for execution, and will not be repeated here.
  • the number of component carrier baseband signals may have a predefined mapping relationship with the set of phase rotation factors.
  • it can be set to require no signaling support.
  • the relationship between the number of component carriers and the basic parameters of phase rotation can be directly specified in the protocol.
  • two time slots can be used as the time domain unit of phase rotation.
  • N phase is 4
  • N phase is 2.
  • the calculation reduction parameters N group , D and PAPR thr are selected by the terminal according to its own capabilities, and there is no need to inform the base station.
  • the signal sending method may further include: receiving a phase rotation on instruction; wherein the phase rotation on instruction is used for Instruct to turn on the selection of the phase rotation factor to process the signal to be sent.
  • the base station informs the terminal whether to turn on phase rotation and the time domain unit of phase rotation through signaling.
  • the relationship between N phase and the number of component carriers is directly specified in the agreement
  • N phase may be provided when the number of carriers less than or equal 4 N phase takes 4, the remaining members of the number of carriers taken 2 N phase.
  • the calculation reduction parameters N group , D and PAPR thr are selected by the terminal according to its own capabilities, and there is no need to inform the base station.
  • the signal sending method may further include: sending a phase rotation factor corresponding to each component carrier baseband signal.
  • the terminal after receiving the phase rotation on instruction, the terminal informs the base station of the phase rotation factor used by each component carrier of each time domain unit.
  • the base station by setting multiple indication modes, it is helpful for the base station to determine the processing mode of the signal to be sent by the terminal, so as to have an opportunity to perform preprocessing and improve the reception quality.
  • the carrier aggregation peak-to-average ratio suppression effect with N cc values of 4, 8, 16 is simulated, the modulation mode is QPSK, and 1 time slot is Time domain unit, without loss of generality, the component carriers are dispersed and evenly distributed throughout the working frequency band in the simulation.
  • the PAPR drops by about 1.3dB, 1.59dB, and 1.64dB after turning on the phase rotation at the 0.1% position of the CCDF curve.
  • the wireless power private network terminal works in the frequency band 223MHz-235MHz, the carrier spacing is 25kHz, the component carrier contains 6 subcarriers, and the subcarrier spacing is 3.75kHz, and the system supports flexible discrete carrier aggregation scheduling.
  • 9 bits in the DCI indicate the starting carrier index, 4 bits indicate the number of PUSCH carrier aggregation component carriers, at least one component carrier, and a maximum of 16 component carriers.
  • the modulation method is determined by the terminal's modulation capability. If the modulation capability is low, only QPSK modulation is supported, and if the capability is high, it additionally supports 16QAM and 64QAM modulation.
  • the peak-to-average ratio suppression process can be started as shown in Figure 1. Simulate the suppression effect of carrier aggregation peak-to-average ratio with N cc values of 4, 8, and 16, the modulation method is QPSK, and 1 time slot is the time domain unit, without loss of generality, the component carriers are dispersed uniformly in the simulation The distribution is throughout the working frequency band.
  • Table 1 The relationship between carrier grouping, phase combination extraction and other parameters and component carriers is shown in Table 1.
  • FIG. 4 is a schematic structural diagram of a signal sending device in an embodiment of the present invention.
  • the signal sending device may include:
  • the signal determining module 41 is adapted to determine multiple component carrier baseband signals
  • the selection module 42 is adapted to select a plurality of phase rotation factors, each phase rotation factor corresponds to the component carrier baseband signal one-to-one, and records the number of selection times plus one;
  • the peak-to-average ratio determining module 43 is adapted to determine the signal to be sent and its peak-to-average ratio according to the phase rotation factor and the component carrier baseband signal;
  • the reselection module 44 is adapted to re-select the phase rotation factor and re-determine the signal to be sent and its peak-to-average ratio when the peak-to-average ratio is greater than or equal to a preset threshold and the number of selections does not reach the preset number of times.
  • the peak-to-average ratio is less than the preset threshold or the number of selections reaches the preset number;
  • the sending module 45 is adapted to send the signal to be sent
  • determining the signal to be transmitted and its peak-to-average ratio according to the phase rotation factor and the component carrier baseband signal includes: for each component carrier baseband signal, after upsampling is moved to the corresponding carrier aggregation baseband frequency, and the selected phase The twiddle factors are multiplied to obtain multiple carrier signals; the multiple carrier signals are added together to obtain the signal to be sent, and then the peak-to-average ratio of the signal to be sent is determined.
  • the phase rotation factor corresponding to the component carrier baseband signal is selected one-to-one by single or multiple times, and the peak-to-average ratio of the signal to be transmitted is calculated each time until the peak-to-average ratio is less than the preset The threshold or the number of selections reaches a preset number of times, and then it is sent.
  • this process is not easy to distort the signal, and it is not easy to affect the EVM and ACLR of the signal, and can be used in conjunction with conventional signal predistortion peak-to-average ratio suppression technology, which helps to further reduce the peak-to-average ratio.
  • the embodiment of the present invention also provides a storage medium on which computer instructions are stored, and the computer instructions execute the steps of the above-mentioned signal sending method when the computer instructions are run.
  • the storage medium may be a computer-readable storage medium, for example, may include non-volatile memory (non-volatile) or non-transitory (non-transitory) memory, and may also include optical disks, mechanical hard disks, solid state hard disks, and the like.
  • the processor may be a central processing unit (central processing unit, CPU for short), and the processor may also be other general-purpose processors, or digital signal processors (DSP for short). ), application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (read-only memory, ROM for short), programmable read-only memory (programmable ROM, PROM for short), erasable PROM (EPROM for short) , Electrically Erasable Programmable Read-Only Memory (EPROM, EEPROM for short) or flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM for short), which is used as an external cache.
  • random access memory random access memory
  • RAM random access memory
  • SRAM static RAM
  • DRAM dynamic random access memory
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM Synchronously connect dynamic random access memory
  • DRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM Synchronously connect dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • An embodiment of the present invention also provides a user terminal, including a memory and a processor, the memory stores computer instructions that can run on the processor, and the processor executes the signal sending when the computer instructions are executed. Method steps.
  • the terminal includes, but is not limited to, terminal devices such as mobile phones, computers, and tablets.
  • the terminal in the embodiment of the present application may refer to various forms of user equipment (user equipment, UE for short), access terminal, user unit, user station, mobile station, mobile station (mobile station, MS), remote Station, remote terminal, mobile equipment, user terminal, terminal equipment, wireless communication equipment, user agent or user device.
  • user equipment user equipment, UE for short
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote Station remote terminal
  • mobile equipment user terminal
  • terminal equipment wireless communication equipment
  • user agent or user device user agent
  • the terminal equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (Public Land Mobile Network, referred to as The terminal equipment in the PLMN) is not limited in the embodiment of the present application.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant

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Abstract

一种信号发送方法及装置、存储介质、用户终端，所述发送方法包括以下步骤：确定多个成员载波基带信号；选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；如果所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数，则重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；发送所述待发送信号。本发明方案可以降低峰均比。

Description

信号发送方法及装置、存储介质、用户终端
本申请要求于2019年7月15日提交中国专利局、申请号为201910639061.5、发明名称为“信号发送方法及装置、存储介质、用户终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种信号发送方法及装置、存储介质、用户终端。
背景技术
电力专网在230MHz频段拥有国家无线电管理委员会分配的10个单工频点，15对双工频点，每个频点带宽25kHz，离散不等间隔地分布在223MHz～226MHz和229MHz～233MHz。在进行高速率数据传输时需要使用载波聚合技术，将多个离散频点联合使用，对于终端上行传输最多需要进行包含16个成员载波的载波聚合，成员载波(Component Carrier，CC)数远超常见的无线网络(例如LTE-Advanced中最多5个)。
载波聚合技术的使用，尤其是成员载波数量增多，会无可避免地使信号峰均比(Peak to Average Power Ratio，PAPR)升高，导致高峰均比信号在经过非线性器件时，例如功率放大器，会受到更强的非线性失真影响，信号的误差向量幅度和邻道泄露比等指标变差，系统性能下降。
然而，目前并无适用于成员载波数较多的载波聚合的峰均比抑制方法。
发明内容
本发明解决的技术问题是提供一种信号发送方法及装置、存储介质、用户终端，可以降低峰均比。
为解决上述技术问题，本发明实施例提供一种信号发送方法，其特征在于，包括以下步骤：确定多个成员载波基带信号；选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；如果所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数，则重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；发送所述待发送信号；其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比包括：对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
可选的，确定多个成员载波基带信号包括：确定多个成员载波的原始基带信号；对所述多个成员载波的原始基带信号进行分组，每组成员载波的原始基带信号的数量相同；对每组成员载波的原始基带信号在升采样搬移至对应的载波聚合基带频率后，进行预合并，以作为单个成员载波基带信号。
可选的，采用下述公式确定选取的相位旋转因子：
Figure PCTCN2020084827-appb-000001
其中，
Figure PCTCN2020084827-appb-000002
用于表示选取的相位旋转因子，N phase用于表示相位旋转因子的数量，
Figure PCTCN2020084827-appb-000003
用于表示相位旋转因子的集合，i用于表示选取的相位旋转因子在所述相位旋转因子的集合中的索引；
其中，采用下述公式确定所述索引：
Figure PCTCN2020084827-appb-000004
其中，k用于表示所述选取次数，c用于表示所述成员载波基带信号的序号。
可选的，所述相位旋转因子的集合
Figure PCTCN2020084827-appb-000005
为
Figure PCTCN2020084827-appb-000006
Figure PCTCN2020084827-appb-000007
可选的，采用下述公式确定所述预设次数：
Figure PCTCN2020084827-appb-000008
其中，n用于表示所述预设次数，N CC用于表示成员载波基带信号数量，D用于表示相位组合降采样因子，D＞1，且D为正整数。
可选的，所述成员载波基带信号的数量与所述相位旋转因子的集合之间具有预定义的映射关系。
可选的，在选取多个相位旋转因子之前，所述的信号发送方法还包括：接收相位旋转开启指令；其中，所述相位旋转开启指令用于指示开启所述相位旋转因子的选取，以对所述待发送信号进行处理。
可选的，所述的信号发送方法还包括：发送每个成员载波基带信号对应的相位旋转因子。
为解决上述技术问题，本发明实施例提供一种信号发送装置，其特征在于，包括：信号确定模块，适于确定多个成员载波基带信号；选取模块，适于选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；峰均比确定模块，适于根据所述相位旋转因子以及所述成员载波基带信号确定待发送 信号及其峰均比；重选模块，适于当所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数时，重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；发送模块，适于发送所述待发送信号；其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比包括：对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
为解决上述技术问题，本发明实施例提供一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述信号发送方法的步骤。
为解决上述技术问题，本发明实施例提供一种用户终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述信号发送方法的步骤。
现有技术相比，本发明实施例的技术方案具有以下有益效果：
在本发明实施例中，通过单次或多次选取与成员载波基带信号一一对应的相位旋转因子，并且每次计算待发送信号的峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数，然后进行发送。采用本发明实施例的方案，可以通过不同成员载波间不同的相位旋转，尽可能消除各成员载波信号同相叠加造成的高峰值，以有效地降低峰均比。进一步地，该过程不易使信号发生畸变，不易影响信号的误差向量幅度(Error Vector Magnitude，EVM)和邻道泄露比(Adjacent Channel Leakage Ratio，ACLR)等指标，并且可以配合使用常规的信号预失真类峰均比抑制技术，有助于进一步降低峰均比。
进一步，在本发明实施例中，通过对多个成员载波的原始基带信号进行分组，然后对每组成员载波的原始基带信号在升采样搬移至对 应的载波聚合基带频率后，进行预合并(如相加运算)，可以有效地减少成员载波的运算数量，从而提高运算效率。
附图说明
图1是本发明实施例中一种信号发送方法的流程图；
图2是图1中步骤S11的一种具体实施方式的流程图；
图3是本发明实施例中一种信号发送方法的工作场景示意图；
图4是本发明实施例中一种信号发送装置的结构示意图。
具体实施方式
如前所述，在现有技术中，由于采用载波聚合技术，尤其是大幅增加了成员载波数量，会无可避免地使信号峰均比升高，导致高峰均比信号在经过非线性器件时，例如功率放大器，会受到更强的非线性失真影响，信号的误差向量幅度和邻道泄露比等指标变差，系统性能下降。对于总共280个离散频点的230MHz频段，保证足够的ACLR十分重要。所以在实际应用中需要进行功率回退来抵消高峰均比的影响，但这又会使功率放大器工作效率降低，终端覆盖范围减小。
目前常用的峰均比抑制方法包括：信号预失真类，例如峰值加窗和削峰等方法，其基本原理为直接对幅度超过设定门限的采样点进行处理来降低峰均比，并以加窗或滤波等方法来降低信号的失真程度，该类方法易于实现且可达到较好的峰均比抑制效果，但往往会使信号质量变差，影响EVM与ACLR。以及概率类，例如选择性映射和部分传输序列等方法，其基本原理为通过对各子载波或子载波组进行相位旋转生成若干版本的发送信号，选择其中峰均比最小的版本发送来达到抑制峰均比的效果。
发明人经过研究发现，现有技术虽然可以基本保持信号质量，但 计算复杂度高、信令开销大、需要接收机做特殊处理，以及一系列基于以上方法针对计算量和峰均比抑制效果进行改善的优化方法，会增加额外成本且加大改善复杂度。
在本发明实施例中，通过单次或多次选取与成员载波基带信号一一对应的相位旋转因子，并且每次计算待发送信号的峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数，然后进行发送。采用本发明实施例的方案，可以通过不同成员载波间不同的相位旋转，尽可能消除各成员载波信号同相叠加造成的高峰值，以有效地实现降低峰均比。进一步地，该过程不易使信号发生畸变，不易影响信号的EVM和ACLR等指标，并且可以配合使用常规的信号预失真类峰均比抑制技术，有助于进一步降低峰均比。
为使本发明的上述目的、特征和有益效果能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
参照图1，图1是本发明实施例中一种信号发送方法的流程图。所述信号发送方法可以包括步骤S11至步骤S15：
步骤S11：确定多个成员载波基带信号；
步骤S12：选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；
步骤S13：根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；
步骤S14：如果所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数，则重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；
步骤S15：发送所述待发送信号；
其中，根据所述相位旋转因子以及所述成员载波基带信号确定待 发送信号及其峰均比包括：对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
在步骤S11的具体实施中，可以确定多个成员载波基带信号。
具体地，电力无线专网上行链路可以采用基于CP的SC-FDMA信号，1个时隙为2ms，包括6个符号，其中1个参考符号。进一步地，在电力无线专网载波聚合上行传输中，成员载波最多达16个，此时即使只使用包含两个相位旋转因子的集合，相位组合也多达65536种，需要减少相位组合数量。
参照图2，图2是图1中步骤S11的一种具体实施方式的流程图。所述确定多个成员载波基带信号的步骤可以包括步骤S21至步骤S23，以下对各个步骤进行说明。
在步骤S21中，确定多个成员载波的原始基带信号。
其中，所述原始基带信号可以是上述基于CP的SC-FDMA信号，可以由终端接收得到，还可以是终端生成的。
在步骤S22中，对所述多个成员载波的原始基带信号进行分组，每组成员载波的原始基带信号的数量相同。
具体地，可对成员载波进行分组，即N group个成员载波共用一个相位因子，相位组合数量可大幅减少。
进一步地，可以设置当成员载波的数量达到预设成员数量时，再对所述多个成员载波的原始基带信号进行分组，例如当成员载波的数量大于等于12个时，对所述多个成员载波的原始基带信号进行分组。
需要指出的是，每组成员载波的原始基带信号的数量不宜过小，否则难以达到效果；每组成员载波的原始基带信号的数量不宜过大，否则峰均比抑制性能会随之降低。
作为一个非限制性的例子，每组成员载波的原始基带信号的数量可以选自：2至4个。
在步骤S23中，对每组成员载波的原始基带信号升采样搬移至对应的载波聚合基带频率后，进行预合并，以作为单个成员载波基带信号。
具体地，可以对每组成员载波的原始基带信号升采样搬移至对应的载波聚合基带频率后，进行相加运算，以实现预合并。
在本发明实施例中，通过对多个成员载波的原始基带信号进行分组，然后对每组成员载波的原始基带信号进行预合并(如相加运算)，可以有效地减少成员载波的运算数量，从而提高运算效率。
继续参照图1，在步骤S12的具体实施中，可以选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一。
具体地，以所述成员载波基带信号为频域单位进行相位旋转，可以避免传统选择性映射方法对每个子载波进行相位旋转后需要进行IFFT运算，同时大大降低了相位旋转的组合数量。以若干时隙为时域单位进行相位旋转，参考符号与其他数据符号进行了相同的相位旋转，可使接收机无需额外处理直接解调。
进一步地，可以在多个相位旋转因子中进行抽取。也即直接从所有可能相位组合中抽取部分进行组合，以降低运算量。具体而言，大概率存在多种相位组合均可使载波聚合后的信号达到PAPR最小值，或接近最小值，所以无需对全部相位组合进行尝试。
进一步地，对第k次相位旋转尝试第c个成员载波或成员载波组，可以采用下述从相位集合中选取相位旋转因子
Figure PCTCN2020084827-appb-000009
的公式确定选取的相位旋转因子：
Figure PCTCN2020084827-appb-000010
其中，
Figure PCTCN2020084827-appb-000011
用于表示选取的相位旋转因子，N phase用于表示相位旋转因子的数量，
Figure PCTCN2020084827-appb-000012
用于表示相位旋转因子的集合，i用于表示选取的相位旋转因子在所述相位旋转因子的集合中的索引。
其中，采用下述公式确定所述索引：
Figure PCTCN2020084827-appb-000013
其中，k用于表示所述选取次数，C用于表示所述成员载波基带信号的序号。mod代表求余运算，ceil代表向上取整运算。
进一步地，所述相位旋转因子的集合
Figure PCTCN2020084827-appb-000014
可以为
Figure PCTCN2020084827-appb-000015
Figure PCTCN2020084827-appb-000016
其中N phase为相位旋转因子的数量，在N phase取2或4时，Φ 2＝{1,-1}，Φ 4＝{1,i,-1,-i}，Φ 2和Φ 4可将乘法替换为改变取值正负和交换实部虚部，易于硬件实现。
在步骤S13的具体实施中，可以根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比。
其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比的步骤可以包括：对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
具体而言，通过对各个成员载波基带信号进行升采样数字频率搬移，然后进行多载波基带合并，之后计算信号的PAPR，记录PAPR与各成员载波对应的相位旋转因子，进行下一次相位旋转尝试，经过若干次尝试后选取使PAPR最小的相位组合，发送信号。
在本发明实施例中，通过不同成员载波间不同的相位旋转，可以 尽可能消除各成员载波信号同相叠加造成的高峰值。同时该过程基本不会使信号发生畸变，不影响信号的EVM和ACLR等指标。并且在该方法后可继续使用其它信号预失真类峰均比抑制技术，进一步降低PAPR。
在步骤S14的具体实施中，如果所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数，则重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数。
进一步地，可以采用下述公式确定所述预设次数：
Figure PCTCN2020084827-appb-000017
其中，n用于表示所述预设次数，N CC用于表示成员载波基带信号数量，D用于表示相位组合降采样因子，D＞1，且D为正整数。
在本发明实施例中，可以只对可能相位组合数量的前1/D进行尝试即可，峰均比抑制效果与从所有相位组合中等量随机抽取基本相同，在D较大时峰均比抑制效果下降有限。同时在每次相位旋转尝试后无需在记录PAPR的同时记录每个成员载波使用的相位旋转因子，只需在挑选出最小PAPR后根据尝试次数即时生成对应相位组合即可，节省硬件存储空间。
在步骤S15的具体实施中，发送所述待发送信号。
在本发明实施例中，通过单次或多次选取与成员载波基带信号一一对应的相位旋转因子，并且每次计算待发送信号的峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数，然后进行发送。采用本发明实施例的方案，可以通过不同成员载波间不同的相位旋转，尽可能消除各成员载波信号同相叠加造成的高峰值，以有效地实现降低峰均比。进一步地，该过程不易使信号发生畸变，不易影响信号的EVM和ACLR等指标，并且可以配合使用常规的信号预失真类峰均比抑制技术，有助于进一步降低峰均比。
参照图3，图3是本发明实施例中一种信号发送方法的工作场景示意图。对下对每组成员载波的原始基带信号的数量为2个进行举例说明，所述方法可以包括步骤S31至步骤S36：
在步骤S31中，可以确定多个成员载波的原始基带信号，然后对所述多个成员载波的原始基带信号进行分组，对每组成员载波的原始基带信号升采样搬移至对应的载波聚合基带频率后，进行预合并，例如可以为相加运算。
其中，原始基带信号可以包括CC 1基带信号、CC 2基带信号、……CC x-1基带信号至CC x基带信号。
在步骤S32中，对于各成员载波，可以选取相位旋转因子与成员载波基带信号相乘。
在步骤S33中，对所述多个载波信号进行相加运算。
在步骤S34中，计算PAPR。
需要指出的是，上述步骤中的相乘运算、升采样频率搬移、相加运算以及计算PAPR，均可以采用适当的运算方式进行，在本发明实施例中，对于具体运算方式不做限制。
在步骤S35中，判断PAPR是否小于预设阈值或选取次数达到预设次数，当判断结果为是时，可以执行步骤S36，当判断结果为否时，可以返回执行步骤S32，重新选取相位旋转因子并重新确定待发送信号及其峰均比。
在步骤S36中，发送待发送信号。
在具体实施中，有关步骤S31至步骤S36的更多详细内容请参照前文以及图1至图2的描述进行执行，此处不再赘述。
在本发明实施例的一种具体实施方式中，所述成员载波基带信号的数量可以与所述相位旋转因子的集合之间具有预定义的映射关系。
在具体实施中，可以设置为无需信令支持，例如可以在协议中直接规定成员载波数与相位旋转基本参数的关系。
作为一个非限制性的例子，可以以两个时隙为相位旋转的时域单位，当成员载波数量小于等于4时N phase取4，其余成员载波数量N phase取2。降低计算量参数N group、D、PAPR thr由终端根据自身能力自行选取，且无需告知基站。
在本发明实施例的另一种具体实施方式中，可以在选取多个相位旋转因子之前，所述的信号发送方法还可以包括：接收相位旋转开启指令；其中，所述相位旋转开启指令用于指示开启所述相位旋转因子的选取，以对所述待发送信号进行处理。
在具体实施中，由基站以信令方式告知终端是否开启相位旋转以及相位旋转的时域单位，N phase与成员载波数量的关系在协议中直接规定
作为一个非限制性的例子，可以设置当成员载波数量小于等于4时N phase取4，其余成员载波数量N phase取2。降低计算量参数N group、D、PAPR thr由终端根据自身能力自行选取，且无需告知基站。
在本发明实施例的又一种具体实施方式中，可以在选取多个相位旋转因子之前，所述的信号发送方法还可以包括：发送每个成员载波基带信号对应的相位旋转因子。
在具体实施中，在接收相位旋转开启指令后，终端将每个时域单位每个成员载波所使用的相位旋转因子告知基站。
在本发明实施例中，通过设置多种指示方式，有助于使基站确定终端对所述待发送信号的处理方式，从而有机会进行预处理，提高接收质量。
需要指出的是，在本发明实施例的一种具体应用中，对N cc取值为4、8、16的载波聚合峰均比抑制效果进行仿真，调制方式为QPSK，以1个时隙为时域单位，为不失一般性，仿真中使成员载波离散均匀的分布在整个工作频带。
根据结果可以看出4、8、16个载波成员的载波聚合，在CCDF曲线0.1％位置开启相位旋转后PAPR分别下降约1.3dB、1.59dB、1.64dB。
具体地，无线电力专网终端工作在频段223MHz-235MHz，载波间隔25kHz，成员载波包含6个子载波，子载波间隔为3.75kHz，系统支持灵活的离散载波聚合调度。终端在PUSCH传输中，由DCI中的9比特指示起始载波索引，4比特指示PUSCH载波聚合成员载波数量，最少1个成员载波，最多16个成员载波。调制方式由终端调制能力决定，调制能力低则只支持QPSK调制，能力高则额外支持16QAM、64QAM调制。
在生成每个成员载波的基带信号后可根据图1所示开始峰均比抑制流程。对N cc取值为4、8、16的载波聚合峰均比抑制效果进行仿真，调制方式为QPSK，以1个时隙为时域单位，为不失一般性，仿真中使成员载波离散均匀的分布在整个工作频带。载波分组、相位组合抽取等参数与成员载波的关系如表1所示。
表1
Figure PCTCN2020084827-appb-000018
参照图4，图4是本发明实施例中一种信号发送装置的结构示意图。所述信号发送装置可以包括：
信号确定模块41，适于确定多个成员载波基带信号；
选取模块42，适于选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；
峰均比确定模块43，适于根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；
重选模块44，适于当所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数时，重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；
发送模块45，适于发送所述待发送信号；
其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比包括：对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
关于该信号发送装置的原理、具体实现和有益效果请参照前文及图1至图3示出的关于信号发送方法的相关描述，此处不再赘述。
在本发明实施例中，通过单次或多次选取与成员载波基带信号一一对应的相位旋转因子，并且每次计算待发送信号的峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数，然后进行发送。采用本发明实施例的方案，可以通过不同成员载波间不同的相位旋转，尽可能消除各成员载波信号同相叠加造成的高峰值，以有效地实现降低峰均比。进一步地，该过程不易使信号发生畸变，不易影响信号的EVM和ACLR等指标，并且可以配合使用常规的信号预失真类峰均比抑制技术，有助于进一步降低峰均比。
需要指出的是，本方明技术方案可适用于5G(5 Generation)通信系统，还可适用于4G、3G通信系统，还可适用于未来新的各种通 信系统，例如6G、7G等。
本发明实施例还提供了一种存储介质，其上存储有计算机指令，所述计算机指令运行时执行上述信号发送方法的步骤。所述存储介质可以是计算机可读存储介质，例如可以包括非挥发性存储器(non-volatile)或者非瞬态(non-transitory)存储器，还可以包括光盘、机械硬盘、固态硬盘等。
具体地，在本发明实施例中，所述处理器可以为中央处理单元(central processing unit，简称CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，简称DSP)、专用集成电路(application specific integrated circuit，简称ASIC)、现成可编程门阵列(field programmable gate array，简称FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，简称ROM)、可编程只读存储器(programmable ROM，简称PROM)、可擦除可编程只读存储器(erasable PROM，简称EPROM)、电可擦除可编程只读存储器(electrically EPROM，简称EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，简称RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，简称RAM)可用，例如静态随机存取存储器(static RAM，简称SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，简称SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，简称DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，简称ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，简称SLDRAM)和直接内存总线随机存取存储器(direct  rambus RAM，简称DR RAM)。
本发明实施例还提供了一种用户终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，所述处理器运行所述计算机指令时执行上述信号发送方法的步骤。所述终端包括但不限于手机、计算机、平板电脑等终端设备。
具体地，本申请实施例中的终端可以指各种形式的用户设备(user equipment，简称UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station，建成MS)、远方站、远程终端、移动设备、用户终端、终端设备(terminal equipment)、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，简称SIP)电话、无线本地环路(Wireless Local Loop，简称WLL)站、个人数字处理(Personal Digital Assistant，简称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网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，简称PLMN)中的终端设备等，本申请实施例对此并不限定。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (11)

  1. 一种信号发送方法，其特征在于，包括以下步骤：
    确定多个成员载波基带信号；
    选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；
    根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；
    如果所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数，则重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；
    发送所述待发送信号；
    其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比包括：
    对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；
    对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
  2. 根据权利要求1所述的信号发送方法，其特征在于，确定多个成员载波基带信号包括：
    确定多个成员载波的原始基带信号；
    对所述多个成员载波的原始基带信号进行分组，每组成员载波的原始基带信号的数量相同；
    对每组成员载波的原始基带信号在升采样搬移至对应的载波聚合基带频率后进行预合并，以作为单个成员载波基带信号。
  3. 根据权利要求1所述的信号发送方法，其特征在于，采用下述公式确定选取的相位旋转因子：
    Figure PCTCN2020084827-appb-100001
    其中，
    Figure PCTCN2020084827-appb-100002
    用于表示选取的相位旋转因子，N phase用于表示相位旋转因子的数量，
    Figure PCTCN2020084827-appb-100003
    用于表示相位旋转因子的集合，i用于表示选取的相位旋转因子在所述相位旋转因子的集合中的索引；
    其中，采用下述公式确定所述索引：
    Figure PCTCN2020084827-appb-100004
    其中，k用于表示所述选取次数，c用于表示所述成员载波基带信号的序号。
  4. 根据权利要求3所述的信号发送方法，其特征在于，所述相位旋转因子的集合
    Figure PCTCN2020084827-appb-100005
    为
    Figure PCTCN2020084827-appb-100006
    Figure PCTCN2020084827-appb-100007
  5. 根据权利要求1所述的信号发送方法，其特征在于，采用下述公式确定所述预设次数：
    Figure PCTCN2020084827-appb-100008
    其中，n用于表示所述预设次数，N CC用于表示成员载波基带信号数量，D用于表示相位组合降采样因子，D＞1，且D为正整数。
  6. 根据权利要求1所述的信号发送方法，其特征在于，
    所述成员载波基带信号的数量与所述相位旋转因子的集合之间具有预定义的映射关系。
  7. 根据权利要求1所述的信号发送方法，其特征在于，在选取多个 相位旋转因子之前，还包括：
    接收相位旋转开启指令；
    其中，所述相位旋转开启指令用于指示开启所述相位旋转因子的选取，以对所述待发送信号进行处理。
  8. 根据权利要求1所述的信号发送方法，其特征在于，还包括：
    发送每个成员载波基带信号对应的相位旋转因子。
  9. 一种信号发送装置，其特征在于，包括：
    信号确定模块，适于确定多个成员载波基带信号；
    选取模块，适于选取多个相位旋转因子，每个相位旋转因子与所述成员载波基带信号一一对应，并记录选取次数加一；
    峰均比确定模块，适于根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比；
    重选模块，适于当所述峰均比大于等于预设阈值，并且所述选取次数未达到预设次数时，重新选取相位旋转因子并重新确定待发送信号及其峰均比，直至所述峰均比小于所述预设阈值或者所述选取次数达到预设次数；
    发送模块，适于发送所述待发送信号；
    其中，根据所述相位旋转因子以及所述成员载波基带信号确定待发送信号及其峰均比包括：
    对于各个成员载波基带信号，升采样搬移至对应的载波聚合基带频率后，分别与选取的相位旋转因子相乘，以得到多个载波信号；
    对所述多个载波信号进行相加运算，以得到所述待发送信号，然后确定所述待发送信号的峰均比。
  10. 一种存储介质，其上存储有计算机指令，其特征在于，所述计算机指令运行时执行权利要求1至8任一项所述信号发送方法的步 骤。
  11. 一种用户终端，包括存储器和处理器，所述存储器上存储有能够在所述处理器上运行的计算机指令，其特征在于，所述处理器运行所述计算机指令时执行权利要求1至8任一项所述信号发送方法的步骤。
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