WO2020239043A1 - 信号处理方法、装置和存储介质 - Google Patents

信号处理方法、装置和存储介质 Download PDF

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Publication number
WO2020239043A1
WO2020239043A1 PCT/CN2020/093040 CN2020093040W WO2020239043A1 WO 2020239043 A1 WO2020239043 A1 WO 2020239043A1 CN 2020093040 W CN2020093040 W CN 2020093040W WO 2020239043 A1 WO2020239043 A1 WO 2020239043A1
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Prior art keywords
signal
service
training
service signal
power
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PCT/CN2020/093040
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English (en)
French (fr)
Inventor
邓森洋
张作锋
戴征坚
王蕾
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中兴通讯股份有限公司
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Priority to EP20814250.5A priority Critical patent/EP3962008A4/en
Publication of WO2020239043A1 publication Critical patent/WO2020239043A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
    • H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/001—Analogue/digital/analogue conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0425—Circuits with power amplifiers with linearisation using predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0433—Circuits with power amplifiers with linearisation using feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0441—Circuits with power amplifiers with linearisation using feed-forward
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion

Definitions

  • the embodiments of the present application relate to, but are not limited to, the field of signal processing, such as a signal processing method, device, and storage medium.
  • the nonlinear characteristics of the power amplifier in the wireless communication system are strongly related to factors such as power, temperature, bandwidth, etc. Therefore, a digital pre-distortion (DPD) system is required to extract the characteristics of the power amplifier in real time and compensate for the extracted characteristics of the power amplifier to ensure The power amplifier has no distortion output.
  • DPD digital pre-distortion
  • wireless communication systems often work in dynamic source scenarios, that is, service signals often change suddenly, which will cause sudden changes in power amplifier characteristics. In the sudden change process, the digital distortion characteristics and the actual power amplifier characteristics will not adapt to the phenomenon, which affects the system stability.
  • the compensation effect of the digital predistortion technology in the related technology strongly depends on the characteristics of the service signal in the actual system, and it is difficult to compensate for the abrupt power amplifier characteristics. Therefore, the technology of sending sequence signals in idle time slots has emerged.
  • the sequence signal power, bandwidth and other characteristics are predetermined and include power amplifier characteristics.
  • the DPD compensation effect can be corrected under the sudden change of service signal characteristics.
  • VSWR Voltage Standing Wave Ratio
  • power detection power detection
  • channel performance detection such as Adjacent Channel Leakage Ratio, ACPR
  • ACPR Adjacent Channel Leakage Ratio
  • the service signal in the 5G New Radio Access Technology (NR) system has a larger bandwidth, and the scheduling is more flexible and changeable, resulting in frequent changes in the power, frequency, and bandwidth of the service signal.
  • DPD technology and detection technology in related technologies face the following problems:
  • the related technology sends a specified signal to modify the DPD model in an idle time slot, but there are great limitations.
  • the embodiments of the present application provide a signal processing method and device, which can overcome the limitation of sending a designated signal in an idle time slot, realize signal processing, and improve the stability and performance of the system.
  • the embodiment of the present application provides a signal processing method, including:
  • Collect the second combined signal output by the power amplifier or reflected by the subsequent circuit extract the second training signal from the second combined signal, and implement signal processing according to the second training signal.
  • the embodiment of the present application provides a signal processing device, including:
  • the signal sending module is configured to generate a first training signal, adjust the power of the first training signal, and add the power-adjusted first training signal to the first service signal to obtain the first combined signal;
  • the signal acquisition module is set to acquire the second combined signal output by the power amplifier or reflected by the subsequent circuit
  • the signal processing module is configured to extract a second training signal from the second combined signal, and implement signal processing according to the second training signal.
  • the embodiment of the present application provides a signal processing device, which includes a processor and a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions are executed by the processor, any one of the foregoing Kind of signal processing method.
  • the embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, any one of the foregoing signal processing methods is implemented.
  • FIG. 1 is a flowchart of a signal processing method proposed in an embodiment of this application
  • FIG. 2 is a schematic diagram of a method for extracting a second training signal from a second combined signal according to an embodiment of the application
  • FIG. 3 is a flowchart of a signal processing method proposed in another embodiment of this application.
  • FIG. 5 is a schematic diagram of the structural composition of a signal processing device proposed in another embodiment of the application.
  • FIG. 6 is a first schematic diagram of a signal processing device according to an embodiment of the application.
  • FIG. 7 is a second schematic diagram of a signal processing device according to an embodiment of the application.
  • FIG. 8 is a schematic diagram of a TD-LTE frame structure according to an embodiment of the application.
  • the baseband signal undergoes rate conversion and shaping filtering.
  • processing modules such as rate conversion, shaping filtering, peak clipping, etc.
  • processing modules such as rate conversion, shaping filtering, and peak clipping are processed
  • the DAC module converts the signals processed by rate conversion, shaping filtering, and peak clipping into analog signals, and then enters the RF module to mix the analog signals To the radio frequency, and perform preliminary amplification, then enter the power amplifier module (ie, power amplifier) for power amplification, and finally pass the filter and antenna to convert the radio frequency signal into an electromagnetic wave form and emit it.
  • the power amplifier module ie, power amplifier
  • the baseband signal undergoes rate conversion, shaping filtering, peak clipping and other processing modules for rate conversion, shaping filtering, peak clipping, etc., then enters the predistortion module for digital predistortion processing, and the DAC module
  • the signal after digital predistortion is converted into an analog signal, and then it enters the radio frequency module to mix the analog signal to the radio frequency, and performs preliminary amplification, then enters the power amplifier module (ie, power amplifier) for power amplification, and finally passes through the filter and antenna to convert the radio frequency
  • the signal is converted into electromagnetic waves and emitted.
  • Collect the power-amplified signal extract the distortion characteristics from the power-amplified signal and the signal before power-amplification, and modify the digital predistortion model according to the distortion characteristics.
  • an embodiment of the present application proposes a signal processing method, including:
  • Step 110 Generate a first training signal Ts, adjust the power of the first training signal Ts, and add the adjusted power of the first training signal Ts to the first service signal Sin to obtain the first combined signal Sout.
  • the first service signal Sin includes any one of the following: a baseband service signal, a service signal before digital predistortion processing, and a service signal after digital predistortion processing.
  • the power-adjusted first training signal Ts can be added to the baseband service signal; or the power-adjusted first training signal Ts can also be added to the service signal before digital predistortion processing; or, the power is adjusted The latter first training signal Ts can also be added to the service signal after digital predistortion processing.
  • generating the first training signal Ts includes: selecting a training signal with a bandwidth equal to the bandwidth corresponding to the high and low frequency points of the filter in the hardware configuration information from the training signals of different bandwidths stored in advance; The selected training signal is processed to obtain the first training signal Ts.
  • the bandwidth of the pre-stored training signals of different bandwidths is between the minimum bandwidth and the maximum bandwidth required by the system, and the power is the rated power configured by the system (that is, the carrier power of each carrier in the hardware configuration information) ,
  • the peak-to-average ratio is the maximum peak-to-average ratio required by the system at rated power.
  • the hardware configuration information includes: the number of carriers, the carrier power of each carrier, the carrier bandwidth of each carrier, the frequency of the Numerically Controlled Oscillator (NCO), the local oscillator, and the filter high and low frequency point.
  • NCO Numerically Controlled Oscillator
  • the selected training signal is copied and frequency shifted according to the number of carriers, so that the frequency corresponding to each carrier corresponds to the training signal.
  • the bandwidth of the training signal corresponding to each carrier is determined by the carrier bandwidth of the carrier in the hardware configuration information.
  • the center frequency of a training signal Ts is determined by the local oscillator and NCO frequency in the hardware configuration information, the NCO frequency is the offset of the local oscillator, and the total bandwidth of the first training signal is determined by the bandwidth corresponding to the high and low frequency points of the filter.
  • adjusting the power of the first training signal Ts includes: adjusting the power of the first training signal Ts to be less than the average power of the first service signal Sin.
  • n is the first traffic signal Sin corresponding to the window signal sample number
  • N is a window length of a window signal
  • S in (i) is the i th first traffic signal values within the signal window.
  • the adjustment ratio can be calculated according to the current power of the first training signal and the average power of the first service signal, that is, the adjustment ratio is the ratio of the average power of the first service signal to the current power of the first training signal, and then The adjusted power of the first training signal can be obtained by multiplying the current power of the first training signal by the adjustment ratio.
  • adding the power-adjusted first training signal Ts to the first service signal Sin to obtain the first combined signal Sout includes: determining the first service signal in all signal windows within the first preset time The peak power of the signal window corresponding to the maximum average power and the maximum average power in the average power of Sin; wherein the length of the signal window is greater than or equal to the length of the first training signal Ts;
  • the training signal Ts is added to the first service signal Sin in the signal window meeting a preset condition to obtain the first combined signal Sout; wherein, the preset condition includes: the first service signal in the signal window The average power of Sin is greater than or equal to the product of the maximum average power and ⁇ , and the peak power of the first service signal Sin in the signal window is greater than or equal to the peak power of the signal window corresponding to the maximum average power and ⁇ product.
  • ⁇ is the power adjustment factor, which can be a preset value.
  • the method further includes: reducing ⁇ , And continue to perform the step of adding the power-adjusted first training signal Ts to the first service signal Sin in a signal window meeting a preset condition to obtain the first combined signal Sout; wherein, M Is an integer greater than or equal to 1.
  • the method further includes: continue The step of determining the peak power of the signal window corresponding to the maximum average power and the maximum average power among the average powers of the first service signal Sin in all signal windows within the second preset time is performed; where M is an integer greater than or equal to 1.
  • the following method may be used to determine the maximum average power and the maximum average power of the signal window corresponding to the maximum average power of the average power of the first service signal Sin in all signal windows within the first preset time or the second preset time: Peak power: statistics the average power and peak power of the first service signal Sin in all signal windows in the first preset time or the second preset time; according to the average power and peak power of the first service signal Sin in all signal windows Determine the peak power of the signal window corresponding to the maximum average power and the maximum average power.
  • the average power of the first service signal Sin in the signal window is according to the formula Calculation; where, n is the first traffic signal Sin corresponding to the window signal sample number, N is a window length of a window signal, S in (i) is the i-th window signal within a first traffic signal value.
  • the maximum average power is the maximum value of the average power of the first service signal Sin in all signal windows.
  • the first training signal with adjusted power may be added to the first service signal according to a certain weight or a specified orthogonal manner to ensure that the demodulation of the service signal is not affected.
  • Step 120 Collect the second combined signal Yout output by the power amplifier or reflected by the subsequent circuit, extract the second training signal Ts_out from the second combined signal, and implement signal processing according to the second training signal Ts_out.
  • extracting the second training signal Ts_out from the second combined signal Yout includes: separating the second combined signal Yout into a second service signal that does not include the second training signal Sout_n and the third combined signal Wout including the second training signal; in the case of separation, it can be achieved by controlling the link data collection delay; extracting from the first service signal Sin and the second service signal Sout_n A predetermined model; wherein the predetermined model includes: a power amplifier model; or, a digital predistortion model and a power amplifier model; according to the first service signal Sin and the predetermined model, the third service signal Sout_norm in the third combined signal Wout is calculated; The three combined signal Wout and the third service signal Sout_norm calculate the second training signal Ts_out in the third combined signal Wout; the second training signal Ts_out is the difference between the third combined signal Wout and the third service signal Sout_norm.
  • the first service signal Sin Converts the first service signal Sin into a fourth service signal before digital predistortion processing; in one embodiment, the first service signal is subjected to rate conversion, shaping filtering, peak clipping, etc., to obtain the fourth service signal before digital predistortion processing.
  • the fourth service signal Convert the first service signal Sin into a fourth service signal before digital predistortion processing; in one embodiment, the first service signal is subjected to rate conversion, shaping filtering, peak clipping, etc.
  • the second training signal Ts_out is the third combined signal Wout and the third service The difference between the signal Sout_norm.
  • the first service signal Sin is converted into a fifth service signal after digital predistortion processing; in one embodiment, the first service signal is subjected to processing such as rate conversion, shaping filtering, peak clipping, and digital predistortion processing to obtain digital The fifth service signal after predistortion processing.
  • the second training signal Ts_out is the third combined signal Wout and the third service The difference between the signal Sout_norm.
  • the digital predistortion model and the power amplifier model are extracted according to the part corresponding to the second service signal Sout_n in the first service signal Sin and the second service signal Sout_n.
  • the third service signal Sout_norm is calculated according to the part of Snorm in the first service signal Sin corresponding to the third combined signal Wout and the digital predistortion model and the power amplifier model.
  • the second training signal Ts_out is the third combined signal Wout and the third service The difference between the signal Sout_norm.
  • the first service signal Sin is converted into a fifth service signal after digital predistortion processing.
  • the power amplifier model is extracted according to a part of the fifth service signal corresponding to the second service signal Sout_n and the second service signal Sout_n.
  • the second training signal Ts_out is the third combined signal Wout and the third service The difference between the signal Sout_norm.
  • the first service signal Sin is a service signal after predistortion processing
  • the following method can be used to realize it.
  • the power amplifier model is extracted according to the part of the first service signal Sin corresponding to the second service signal Sout_n and the second service signal Sout_n.
  • the third service signal Sout_norm is calculated according to the part of Snorm in the first service signal Sin corresponding to the third combined signal Wout and the power amplifier model.
  • the second training signal Ts_out is the third combined signal Wout and the third service The difference between the signal Sout_norm.
  • the signal processing includes at least one of the following: correcting the digital predistortion DPD model, and performing running state detection.
  • the running state detection includes at least one of the following techniques: VSWR detection, power detection, channel New Year detection (for example, Adjacent Channel Protection Ratio (ACPR) performance) and other technologies.
  • the method further includes: Converting the power-adjusted first training signal Ts into a fourth training signal after digital predistortion processing; the realization of signal processing according to the second training signal Ts_out includes: according to the second training signal Ts_out and the first training signal Four training signals realize signal processing.
  • the distortion feature is acquired according to the second training signal Ts_out and the fourth training signal, and the DPD model is corrected according to the distortion feature.
  • the power-adjusted first training signal Ts When the power-adjusted first training signal Ts is added to the baseband service signal, the power-adjusted first training signal Ts needs to be processed such as rate conversion, shaping filtering, peak clipping, and digital predistortion processing to obtain the fourth training signal .
  • the signal processing according to the second training signal Ts_out includes: according to the second training signal Ts_out and the The first training signal Ts after adjusting the power realizes signal processing.
  • the distortion feature is obtained according to the second training signal Ts_out and the power-adjusted first training signal Ts, and the DPD model is corrected according to the distortion feature.
  • the embodiment of the application adds the training signal to the service signal to realize signal processing (for example, DPD model modification, running state detection, etc.), which overcomes the limitation of sending designated signals in idle time slots, thereby improving the stability of the system And performance.
  • signal processing for example, DPD model modification, running state detection, etc.
  • FIG. 3 another embodiment of the present application proposes a signal processing method, including:
  • Step 310 Generate a first training signal, and there is no idle time slot in the signal system; or, if the signal system has an idle time slot, and it is not allowed to send training signals in the idle time slot, adjust the power of the first training signal , Adding the power-adjusted first training signal to the first service signal to obtain the first combined signal.
  • the first training signal is generated, the power of the first training signal is adjusted, and the power-adjusted first training signal is added to the first service signal to obtain the first combined signal.
  • the implementation process is the same as that of step 110 in the foregoing embodiment. The implementation process is the same, so I won't repeat it here.
  • Step 320 Collect the second combined signal output by the power amplifier or reflected by the subsequent circuit, extract the second training signal from the second combined signal, and implement signal processing according to the second training signal.
  • step 320 is the same as that of step 120 in the foregoing embodiment, and will not be repeated here.
  • the idle time slot exists in the signal system; or the idle time slot exists in the signal system and the training signal is allowed to be sent in the idle time slot.
  • the method further includes: adding the generated first training signal to the idle time slot; collecting the third training signal in the idle time slot output by the power amplifier or reflected by the subsequent circuit; and implementing signal processing according to the third training signal .
  • the implementation process is the same as the implementation process of step 410 and step 420 in the following embodiment, and will not be repeated here.
  • FIG. 4 another embodiment of the present application proposes a signal processing method, including:
  • Step 410 Generate a first training signal, and when the signal system has the idle time slot; or, when the signal system has the idle time slot and the training signal is allowed to be sent in the idle time slot, change The generated first training signal is added to the idle time slot.
  • the implementation process of generating the first training signal is the same as the implementation process of generating the first training signal in step 110 of the foregoing embodiment, and will not be repeated here.
  • FIG. 8 is a time-division long-term evolution (TD-LTE) frame structure diagram according to an embodiment of the application.
  • One frame is 10ms long, contains two half frames, and there are 10 subframes in total, and each subframe is 1ms long.
  • the 0th subframe is downlink
  • the 1st subframe is a special subframe
  • the 2, 3, and 4 subframes are uplink subframes
  • the 5-9th subframes are Downlink subframe.
  • the first training signal can be sent in the idle time slot GP, or in the subframe of the downlink service signal.
  • Step 420 Collect the third training signal in the idle time slot output by the power amplifier or reflected by the subsequent circuit; implement signal processing according to the third training signal.
  • the signal processing includes at least one of the following: correcting the digital predistortion DPD model, and performing running state detection.
  • the running status detection includes at least one of the following: VSWR detection, power detection, channel New Year detection (for example, ACPR performance) and other technologies.
  • the method when the first service signal Sin is a baseband service signal or a service signal before digital predistortion processing, before the signal processing is implemented according to the third training signal, the method further includes: The power-adjusted first training signal Ts is converted into a fourth training signal after digital predistortion processing; the realization of signal processing according to the third training signal includes: according to the third training signal and the fourth training signal Realize signal processing.
  • the distortion feature is acquired according to the third training signal and the fourth training signal, and the DPD model is corrected according to the distortion feature.
  • the power-adjusted first training signal Ts When the power-adjusted first training signal Ts is added to the baseband service signal, the power-adjusted first training signal Ts needs to be processed by rate conversion, shaping filtering, peak clipping, and digital predistortion processing to obtain the fourth Training signal; when the power-adjusted first training signal Ts is added to the service signal before digital predistortion processing, the power-adjusted first training signal Ts needs to be digitally predistorted to obtain the fourth training signal.
  • the realization of signal processing according to the third training signal includes: according to the third training signal and the first The training signal Ts realizes signal processing.
  • the distortion feature is acquired according to the third training signal and the first training signal Ts, and the DPD model is corrected according to the distortion feature.
  • the idle time slot exists in the signal system; or, the idle time slot exists in the signal system, and the training signal is added to the idle time only when the training signal is allowed to be sent in the idle time slot
  • the signal processing is implemented in the slot, which overcomes the limitation of sending designated signals in idle time slots, thereby improving the stability and performance of the system.
  • the embodiment of this application can send training signals in any position of the data stream (including idle time slots and service signals).
  • the power and bandwidth of the training signal are fixed, and it has wider bandwidth characteristics, including Richer power amplifier distortion characteristics or reflection characteristics, thereby improving the stability and performance of the DPD model correction and operating state detection technology, which is suitable for Time Division Duplexing (TDD) and Frequency Division Duplexing, FDD) All signal standard systems.
  • TDD Time Division Duplexing
  • FDD Frequency Division Duplexing
  • the signal processing method of the embodiment of the present application is highly scalable, including DPD model modification, voltage standing wave ratio detection, power detection, and ACPR detection, etc., which can greatly reduce the degree of coupling with service signals and improve The overall stability and performance indicators of the communication system.
  • another embodiment of the present application provides a signal processing device, including: a signal sending module 501, configured to generate a first training signal, adjust the power of the first training signal, and adjust the power of the first training signal Add to the first service signal to obtain the first combined signal; the signal acquisition module 502 is set to collect the second combined signal output by the power amplifier or reflected by the subsequent circuit; the signal processing module 503 is set to receive the second combined signal The second training signal is extracted from, and signal processing is implemented according to the second training signal.
  • a signal sending module 501 configured to generate a first training signal, adjust the power of the first training signal, and adjust the power of the first training signal Add to the first service signal to obtain the first combined signal
  • the signal acquisition module 502 is set to collect the second combined signal output by the power amplifier or reflected by the subsequent circuit
  • the signal processing module 503 is set to receive the second combined signal
  • the second training signal is extracted from, and signal processing is implemented according to the second training signal.
  • the signal sending module 501 is further configured to: generate a first training signal, and there is no idle time slot in the signal system; or, there are idle time slots in the signal system, and the idle time slot is not allowed
  • the power of the first training signal is adjusted, and the first training signal with the adjusted power is added to the first service signal to obtain the first combined signal.
  • the signal sending module 501 is further configured to: the idle time slot exists in the signal system; or, the idle time slot exists in the signal system, and the idle time slot is allowed In the case of sending a training signal, the generated first training signal is added to the idle time slot; the signal acquisition module 502 is also set to collect the third training signal in the idle time slot output by the power amplifier or reflected by the subsequent circuit ; The signal processing module 503 is also configured to implement signal processing according to the third training signal.
  • the signal sending module 501 is configured to implement the adjustment of the power of the first training signal in the following manner: adjusting the power of the first training signal to be less than the average power of the first service signal.
  • the signal sending module 501 is configured to implement the first training signal generation in the following manner: select from pre-stored training signals with different bandwidths that the bandwidth is equal to the filter high and low frequency points in the hardware configuration information. A training signal with a bandwidth of, and processing the selected training signal according to hardware configuration information to obtain the first training signal.
  • the signal sending module 501 is configured to implement the adding of the first training signal after the power adjustment to the first service signal to obtain the first combined signal in the following manner: determine the first preset time The maximum average power of the first service signal in all signal windows and the peak power of the signal window corresponding to the maximum average power; wherein the length of the signal window is greater than or equal to the length of the first training signal; and the adjusted power The latter first training signal is added to the first service signal in a signal window meeting a preset condition to obtain the first combined signal; wherein, the preset condition includes: the first service in the signal window The average power of the signal is greater than or equal to the product of the maximum average power and ⁇ , and the peak power of the first service signal in the signal window is greater than or equal to the product of the peak power of the signal window corresponding to the maximum average power and ⁇ .
  • the signal sending module 501 is further configured to: reduce ⁇ when ⁇ is greater than a preset threshold and a signal window meeting the preset condition cannot be found for M consecutive times in the first service signal, And continue to perform the step of adding the power-adjusted first training signal to a signal window meeting a preset condition in the first service signal to obtain the first combined signal; where M is greater than or An integer equal to 1.
  • the signal sending module 501 is further configured to continue when ⁇ is less than or equal to a preset threshold, and a signal window that satisfies the preset condition in the first service signal cannot be found for M consecutive times.
  • the step of determining the maximum average power of the first service signal and the peak power of the signal window corresponding to the maximum average power in all signal windows within the second preset time is performed; where M is an integer greater than or equal to 1.
  • the first service signal includes any one of the following: a baseband service signal, a service signal before digital predistortion processing, and a service signal after digital predistortion processing.
  • the signal processing module 503 is further configured to: extract a second training signal from the second combined signal, where the first service signal is a baseband service signal or a service signal before digital predistortion processing.
  • the first training signal after the power adjustment is converted into a fourth training signal after digital predistortion processing; signal processing is implemented according to the second training signal and the fourth training signal.
  • the signal processing module 503 is configured to extract the second training signal from the second combined signal, and in the case that the first service signal is a baseband service signal, according to the second training signal
  • the signal and the power-adjusted first training signal implement signal processing.
  • the signal processing module 503 is configured to implement the extraction of the second training signal from the second combined signal in the following manner: separating the second combined signal into the first combined signal that does not include the second training signal The second service signal and the third combined signal including the second training signal; extract a predetermined model according to the first service signal and the second service signal; wherein, the predetermined model includes: a power amplifier model; or, a digital predistortion model and Power amplifier model; calculate the third service signal in the third combined signal according to the first service signal and the predetermined model; calculate the second training signal in the third combined signal according to the third combined signal and the third service signal.
  • the signal processing module 503 is further configured to convert the first service signal into a digital predistortion signal when the first service signal is a baseband service signal or a service signal before digital predistortion processing.
  • the fourth service signal before distortion processing or the fifth service signal after digital predistortion processing extract the digital predistortion signal according to the part of the fourth service signal corresponding to the second service signal and the second service signal Distortion model and power amplifier model; or, extract the power amplifier model according to the part of the fifth service signal corresponding to the second service signal and the second service signal; Calculate the third service signal based on the part corresponding to the third combined signal and the digital predistortion model and power amplifier model; or, according to the part of the fifth service signal corresponding to the third combined signal and the The power amplifier model calculates the third service signal.
  • the signal processing module 503 is configured to: in the case that the first service signal is a service signal before predistortion processing, according to the first service signal corresponding to the second service signal Extract the digital predistortion model and power amplifier model from the part of the second service signal and the second service signal; calculate according to the part of the first service signal corresponding to the third combined signal and the digital predistortion model and power amplifier model The third service signal.
  • the signal processing module 503 is configured to: in the case that the first service signal is a service signal after predistortion processing, according to the first service signal corresponding to the second service signal Extracting the power amplifier model from the part of the first service signal and the second service signal; and calculating the third service signal according to the part of the first service signal corresponding to the third combined signal and the power amplifier model.
  • the signal processing includes at least one of the following: correcting the digital predistortion DPD model, and performing running state detection.
  • the implementation process of the above-mentioned signal processing device is the same as the implementation process of the signal processing method in the foregoing embodiment, and will not be repeated here.
  • FIG. 6 is a schematic diagram of a signal processing device according to an embodiment of the application.
  • the signal processing device adds the training signal to the service signal, and then outputs it after passing through the predistortion module and the power amplifier, and extracts the training signal from the power amplifier output signal.
  • the training signal contains the power amplifier distortion characteristics. It can help the system to correct the digital pre-distortion model and improve the stability and performance of DPD in different service signal scenarios.
  • the signal processing device includes: a predistortion module, a power amplifier module (that is, a power amplifier), a signal selection module, and a correction predistortion module.
  • the predistortion module is set to correct the nonlinearity of the power amplifier to ensure the linear output of the power amplifier.
  • the power amplifier is set to further amplify the power of the radio frequency signal, and finally is transmitted into the space in the form of electromagnetic waves through the filter and the antenna.
  • the signal selection module mainly includes a switch (optional, including a digital switch and/or radio frequency switch), a circulator (optional) and a coupler.
  • the circulator is set to isolate the transmitted signal and the reflected signal, and the coupler is used to couple the transmitted or reflected signal into the ADC module for collection.
  • the system will set up and control the digital and RF switches according to the specific requirements of each function to ensure the normal and orderly operation of the entire system.
  • the pre-distortion correction module is configured to use the first training signal without distortion and the second training signal coupled back to the power amplifier port to extract the power amplifier distortion characteristics of the training signal for pre-distortion model correction.
  • FIG. 7 is another schematic diagram of a signal processing device according to an embodiment of the application.
  • the signal processing device adds the training signal to the service signal, and then outputs it after passing through the predistortion module and the power amplifier.
  • the training signal is extracted from the signal output by the power amplifier or the reflected signal of the subsequent circuit. Including power amplifier distortion, reflection and other characteristics. It can help the system to: (1) modify the digital predistortion model to improve the stability and performance of DPD in different service signal scenarios; (2) improve the stability of standing wave ratio detection in different service signal scenarios; (3) improve multiple System power detection stability in business scenarios; (4) ACPR online detection, etc.
  • the signal processing device mainly includes eight modules: training signal generation module, training signal detection module, training signal processing module, power detection module, predistortion module, radio frequency module, power amplifier module (ie power amplifier), signal selection module, digital simulation The converter (DAC, Digital to Analog Converter) module and the analog to digital converter (ADC, Analog to Digital Converter) module.
  • DAC Digital to Analog Converter
  • ADC Analog to Digital Converter
  • the power detection module is set to count the average power and peak power of the current digital signal in real time, and send it to the training signal generation module to determine the relevant parameters of the first training signal, such as power, peak-to-average ratio, etc.
  • the training signal generating module is configured to generate a first training signal Ts, adjust the power of the first training signal Ts, and determine the position where the adjusted power of the first training signal Ts is added to the first service signal Sin.
  • the predistortion module is set to correct the nonlinearity of the power amplifier to ensure the linear output of the power amplifier.
  • the DAC module is set to convert digital signals into analog signals.
  • ADC module set to convert analog signals into digital signals.
  • the radio frequency module is set to perform spectrum shift and small signal amplification for analog signals.
  • the power amplifier is set to mainly amplify the power of the radio frequency signal, and finally is transmitted into the space in the form of electromagnetic waves through a filter and an antenna (ie, a subsequent circuit).
  • the signal selection module mainly includes a switch (optional, including a digital switch and/or radio frequency switch), a circulator (optional) and a coupler.
  • the circulator is set to isolate the transmitted signal and the reflected signal, and the coupler is used to couple the transmitted or reflected signal into the ADC module for collection.
  • the system will set up and control the digital and RF switches according to the specific requirements of each function to ensure the normal and orderly operation of the entire system.
  • the training signal detection module in the case that the first training signal is added to the first service signal and sent, the service signal power amplifier model is established according to the first training signal sent in advance and the first service signal characteristics of the location, and the power amplifier The second training signal is extracted from the coupling signal of the output port or the reflection port.
  • the training signal processing module use the distortion-free first training signal and the second training signal coupled back to the power amplifier port or the reflection port to extract the power amplifier distortion characteristics or reflection characteristics of the training signal, respectively, and set them as predistortion model correction and stationary Wave ratio calculation correction, etc.
  • Another embodiment of the present application provides a signal processing device, including a processor and a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions are executed by the processor, the foregoing Any kind of signal processing method.
  • Another embodiment of the present application provides a computer-readable storage medium that stores a computer program, and when the computer program is executed by a processor, it implements the steps of any of the foregoing signal processing methods.
  • Such software may be distributed on a computer-readable medium, and the computer-readable medium may include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium).
  • the term computer storage medium includes volatile and non-volatile memory implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Sexual, removable and non-removable media.
  • Computer storage media include but are not limited to Random Access Memory (RAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory Or other memory technologies, portable compact disk read-only memory (Compact Disc Read-Only Memory, CD-ROM), digital versatile disk (Digital Video Disc, DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic A storage device, or any other medium that can be used to store desired information and can be accessed by a computer.
  • communication media usually contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as carrier waves or other transmission mechanisms, and may include any information delivery media .

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Abstract

本申请实施例公开了一种信号处理方法、装置和存储介质，所述方法包括：生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；采集功放输出的或后级电路反射的第二合路信号，从第二合路信号中提取出第二训练信号，根据所述第二训练信号实现信号处理。

Description

信号处理方法、装置和存储介质
本申请要求在2019年05月28日提交中国专利局、申请号为201910450101.1的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及但不限于信号处理领域，例如一种信号处理方法、装置和存储介质。
背景技术
无线通信系统中功放的非线性特性与功率、温度、带宽等因素强相关，因此，需要数字预失真(Digital Pre-Distortion，DPD)系统实时提取功放特性，并对提取的功放特性进行补偿，确保功放无失真输出。但是无线通信系统常常工作在动态源场景，即业务信号许多时候都是突发性变化的，这会导致功放特性也随之发生突变。在突变过程中数字失真特性与实际功放特性会存在不适应现象，从而影响系统稳定性。相关技术中的数字预失真技术补偿效果强烈依赖于实际系统中的业务信号特性，很难补偿突变性的功放特性。因此，在空闲时隙发送序列信号的技术应运而生，该序列信号功率、带宽等特性预先确定且包含功放特性，可在突变业务信号特性下修正DPD补偿效果。
通信设备的运行状态检测技术也越来越多，例如电压驻波比(Voltage Standing Wave Ratio，VSWR)检测、功率检测、通道性能检测(例如相邻信道泄漏比(Adjacent Channel Leakage Ratio，ACPR)等技术。当系统运行过程中检测到VSWR过大、天线口功率异常或通道性能发生恶化时，系统能够及时进行相应调整并发出告警，从而提升系统稳定性，便于系统维护和故障排查。但是在实际系统中这些检测技术采集信号样本点有限，且都强依赖于业务信号特性，当业务信号发生突变时会导致误告警等问题。
5G新一代无线接入技术(New Radio Access Technology，NR)系统中业务信号具有更大的带宽，调度上也更加灵活多变，导致业务信号的功率、频点、带宽等特性频繁变化。相关技术中的DPD技术和检测技术面临以下几个问题：
(1)由于功放状态随外界环境、业务信号功率和带宽变化，且提取的DPD模型的数据样本点有限不能反映整个数据流的信号特征，DPD补偿效果和相关检测技术的准确度都强烈依赖于业务信号特性，更容易出现系统稳定性和性能 问题。
(2)空闲时隙发送辅助序列信号的技术具有很大局限性。一、部分运营商要求空闲时隙不能发送信号；二、从系统组网性能等方面考虑，空闲时隙尽量不发信号；三、不是所有信号制式都有空闲时隙。
相关技术在空闲时隙发送指定的信号修正DPD模型，但存在很大局限性。
发明内容
本申请实施例提供了一种信号处理方法和装置，能够克服空闲时隙发送指定信号的局限性，实现信号处理，从而提升系统的稳定性和性能。
本申请实施例提供了一种信号处理方法，包括：
生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；
采集功放输出的或后级电路反射的第二合路信号，从第二合路信号中提取出第二训练信号，根据所述第二训练信号实现信号处理。
本申请实施例提供了一种信号处理装置，包括：
信号发送模块，设置为生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；
信号采集模块，设置为采集功放输出的或后级电路反射的第二合路信号；
信号处理模块，设置为从第二合路信号中提取出第二训练信号，根据所述第二训练信号实现信号处理。
本申请实施例提供了一种信号处理装置，包括处理器和计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令被所述处理器执行时，实现上述任一种信号处理方法。
本申请实施例提供了一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现上述任一种信号处理方法。
附图说明
附图用来提供对本申请实施例技术方案的理解，并且构成说明书的一部分，与本申请实施例的实施例一起用于解释本申请实施例的技术方案，并不构成对本申请实施例技术方案的限制。
图1为本申请一个实施例提出的信号处理方法的流程图；
图2为本申请实施例从第二合路信号中提取出第二训练信号的方法的示意图；
图3为本申请另一个实施例提出的信号处理方法的流程图；
图4为本申请另一个实施例提出的信号处理方法的流程图；
图5为本申请另一个实施例提出的信号处理装置的结构组成示意图；
图6为本申请实施例信号处理装置的示意图一；
图7为本申请实施例信号处理装置的示意图二；
图8为本申请实施例的TD-LTE帧结构示意图。
具体实施方式
下文中将结合附图对本申请实施例进行说明。
在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行。并且，虽然在流程图中示出了逻辑顺序，但是在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤。
在介绍本申请实施例的信号处理方法之前，首先介绍发送业务信号之前的处理过程，如图6和图7所示，对于没有进行数字预失真模型修正的系统，基带信号经过速率变换、成型滤波、削峰等处理模块进行速率变换、成型滤波、削峰等处理后，通过DAC模块将速率变换、成型滤波、削峰等处理后的信号转换为模拟信号，然后进入射频模块将模拟信号混频至射频，并进行初步放大，然后进入功放模块(即功率放大器)进行功率放大，最后经过滤波器和天线将射频信号转换为电磁波形式发射出去。
对应进行数字预失真模型修正的系统，基带信号经过速率变换、成型滤波、削峰等处理模块进行速率变换、成型滤波、削峰等处理后进入预失真模块进行数字预失真处理，通过DAC模块将数字预失真处理后的信号转换为模拟信号，然后进入射频模块将模拟信号混频至射频，并进行初步放大，然后进入功放模块(即功率放大器)进行功率放大，最后经过滤波器和天线将射频信号转换为电磁波形式发射出去。
采集功率放大后的信号，根据功率放大后的信号和功率放大前的信号提取失真特征，根据失真特征修正数字预失真模型。
参见图1，本申请一个实施例提出了一种信号处理方法，包括：
步骤110、生成第一训练信号Ts，调整第一训练信号Ts的功率，将调整功率后的第一训练信号Ts添加到第一业务信号Sin中得到第一合路信号Sout。
在本申请实施例中，第一业务信号Sin包括以下任意一个：基带业务信号、数字预失真处理之前的业务信号、数字预失真处理之后的业务信号。
也就是说，调整功率后的第一训练信号Ts可以添加到基带业务信号中；或者，调整功率后的第一训练信号Ts也可以添加到数字预失真处理之前的业务信号中；或者，调整功率后的第一训练信号Ts也可以添加到数字预失真处理之后的业务信号中。
在本申请实施例中，生成第一训练信号Ts包括：从预先存储的不同带宽的训练信号中选择带宽等于硬件配置信息中的滤波器高低频点对应的带宽的训练信号；根据硬件配置信息对选择的训练信号进行处理得到所述第一训练信号Ts。
在本申请实施例中，预先存储的不同带宽的训练信号的带宽在系统所要求的最小带宽和最大带宽之间，功率为系统配置的额定功率(即硬件配置信息中每个载波的载波功率)，峰均比为额定功率下系统要求的最大峰均比。
在本申请实施例中，硬件配置信息包括：载波个数、每个载波的载波功率、每个载波的载波带宽、数字控制振荡器(Numerically Controlled Oscillator，NCO)频率、本振、滤波器高低频点。
根据载波个数对选择的训练信号进行复制和频移，使得每一个载波对应的频率均对应有训练信号，每一个载波对应的训练信号的带宽由硬件配置信息中的载波的载波带宽确定，第一训练信号Ts的中心频点由硬件配置信息中的本振和NCO频率确定，NCO频率为本振的偏移量，第一训练信号的总带宽由滤波器高低频点对应的带宽确定。
在本申请实施例中，调整第一训练信号Ts的功率包括：将所述第一训练信号Ts的功率调整为小于所述第一业务信号Sin的平均功率。
第一业务信号Sin的平均功率按照公式
Figure PCTCN2020093040-appb-000001
进行计算。
其中，n为第一业务信号Sin对应的信号窗的采样序号，N为信号窗的窗长，S in(i)为信号窗内第i个第一业务信号值。
在进行功率调整时，可以根据第一训练信号的当前功率和第一业务信号的平均功率计算调整比例，即调整比例为第一业务信号的平均功率和第一训练信 号的当前功率的比值，然后将第一训练信号的当前功率乘以调整比例即可得到第一训练信号调整后的功率。
在本申请实施例中，将调整功率后的第一训练信号Ts添加到第一业务信号Sin中得到第一合路信号Sout包括：确定第一预设时间内所有信号窗内的第一业务信号Sin的平均功率中最大平均功率和最大平均功率对应的信号窗的峰值功率；其中，所述信号窗的长度大于或等于所述第一训练信号Ts的长度；将所述调整功率后的第一训练信号Ts添加到所述第一业务信号Sin中满足预设条件的信号窗内得到所述第一合路信号Sout；其中，所述预设条件包括：所述信号窗内的第一业务信号Sin的平均功率大于或等于所述最大平均功率和β的乘积，且所述信号窗内的第一业务信号Sin的峰值功率大于或等于所述最大平均功率对应的信号窗的峰值功率和β的乘积。β为功率调整因子，可以为预设值。
在本申请另一个实施例中，在β大于预设门限，且连续M次寻找不到所述第一业务信号Sin中满足预设条件的信号窗的情况下，该方法还包括：降低β，并继续执行所述将所述调整功率后的第一训练信号Ts添加到所述第一业务信号Sin中满足预设条件的信号窗内得到所述第一合路信号Sout的步骤；其中，M为大于或等于1的整数。
在本申请另一个实施例中，在β小于或等于预设门限，且连续M次寻找不到所述第一业务信号Sin中满足预设条件的信号窗的情况下，该方法还包括：继续执行确定第二预设时间内所有信号窗内的第一业务信号Sin的平均功率中最大平均功率和最大平均功率对应的信号窗的峰值功率的步骤；其中，M为大于或等于1的整数。
在本申请实施例中，可以采用以下方法确定第一预设时间或第二预设时间内所有信号窗内的第一业务信号Sin的平均功率中最大平均功率和最大平均功率对应的信号窗的峰值功率：统计第一预设时间或第二预设时间内所有信号窗内的第一业务信号Sin的平均功率和峰值功率；根据所有信号窗内的第一业务信号Sin的平均功率和峰值功率确定最大平均功率和最大平均功率对应的信号窗的峰值功率。
信号窗内的第一业务信号Sin的平均功率按照公式
Figure PCTCN2020093040-appb-000002
进行计算；其中，n为第一业务信号Sin对应的信号窗的采样序号，N为信号窗的窗长，S in(i)为信号窗内第i个第一业务信号值。其中，最大平均功率即为所有 信号窗内的第一业务信号Sin的平均功率的最大值。
在本申请实施例中，调整功率后的第一训练信号可以按照一定权重或者指定的正交方式添加到第一业务信号中，确保不影响业务信号的解调。
步骤120、采集功放输出的或后级电路反射的第二合路信号Yout，从第二合路信号中提取出第二训练信号Ts_out，并根据所述第二训练信号Ts_out实现信号处理。
在本申请实施例中，如图2所示，从第二合路信号Yout中提取出第二训练信号Ts_out包括：将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现；根据所述第一业务信号Sin和所述第二业务信号Sout_n提取预定模型；其中，预定模型包括：功放模型；或者，数字预失真模型和功放模型；根据所述第一业务信号Sin和预定模型计算第三合路信号Wout中的第三业务信号Sout_norm；根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout中的第二训练信号Ts_out；第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
下面分为三种情况分别说明每一种情况的提取过程。
(一)、当所述第一业务信号Sin为基带业务信号时，采用以下任意一种方式来实现。
方法一
将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现。
将所述第一业务信号Sin转换成数字预失真处理之前的第四业务信号；在一实施例中，将第一业务信号进行速率变换、成型滤波、削峰等处理得到数字预失真处理之前的第四业务信号。
根据所述第四业务信号中与所述第二业务信号Sout_n对应的部分和所述第二业务信号Sout_n提取所述数字预失真模型和功放模型。
根据所述第四业务信号中与所述第三合路信号Wout对应的部分Snorm和所述数字预失真模型和功放模型计算所述第三业务信号Sout_norm。
根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout 中的第二训练信号Ts_out；在一实施例中，第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
方法二
将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现。
将所述第一业务信号Sin转换成数字预失真处理之后的第五业务信号；在一实施例中，将第一业务信号进行速率变换、成型滤波、削峰等处理和数字预失真处理得到数字预失真处理之后的第五业务信号。
根据所述第五业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述功放模型。
根据所述第五业务信号中与所述第三合路信号Wout对应的部分Snorm和所述功放模型计算所述第三业务信号Sout_norm。
根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout中的第二训练信号Ts_out；在一实施例中，第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
(二)、在所述第一业务信号Sin为预失真处理之前的业务信号的情况下，采用以下任意一种方式来实现。
方法一
将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现。
根据第一业务信号Sin中与第二业务信号Sout_n对应的部分和第二业务信号Sout_n提取数字预失真模型和功放模型。
根据第一业务信号Sin中与第三合路信号Wout对应的部分Snorm和数字预失真模型和功放模型计算第三业务信号Sout_norm。
根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout中的第二训练信号Ts_out；在一实施例中，第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
方法二、
将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现。
将所述第一业务信号Sin转换成数字预失真处理之后的第五业务信号。
根据所述第五业务信号中与所述第二业务信号Sout_n对应的部分和所述第二业务信号Sout_n提取所述功放模型。
根据所述第五业务信号中与所述第三合路信号Wout对应的部分Snorm和所述功放模型计算所述第三业务信号Sout_norm。
根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout中的第二训练信号Ts_out；在一实施例中，第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
(三)、在所述第一业务信号Sin为预失真处理之后的业务信号的情况下，可以采用以下方法来实现。
将第二合路信号Yout分离为不包括第二训练信号的第二业务信号Sout_n和包括第二训练信号的第三合路信号Wout；在分离的情况下，可以通过控制链路采数时延来实现。
根据所述第一业务信号Sin中与所述第二业务信号Sout_n对应的部分和所述第二业务信号Sout_n提取所述功放模型。
根据所述第一业务信号Sin中与所述第三合路信号Wout对应的部分Snorm和所述功放模型计算所述第三业务信号Sout_norm。
根据第三合路信号Wout和第三业务信号Sout_norm计算第三合路信号Wout中的第二训练信号Ts_out；在一实施例中，第二训练信号Ts_out为第三合路信号Wout和第三业务信号Sout_norm之差。
在本申请实施例中，信号处理包括以下至少之一：修正数字预失真DPD模型、进行运行状态检测。
在一实施例中，运行状态检测包括以下至少之一：VSWR检测、功率检测、通道新年检测(例如邻信道功率比(Adjacent Channel Protection Ratio，ACPR)性能)等技术。
在本申请实施例中，在所述第一业务信号Sin为基带业务信号或数字预失真处理之前的业务信号的情况下，所述根据第二训练信号Ts_out实现信号处理之 前，该方法还包括：将所述调整功率后的第一训练信号Ts转换成数字预失真处理之后的第四训练信号；所述根据第二训练信号Ts_out实现信号处理包括：根据所述第二训练信号Ts_out和所述第四训练信号实现信号处理。例如，根据第二训练信号Ts_out和第四训练信号获取失真特征，根据失真特征修正DPD模型。
当调整功率后的第一训练信号Ts添加到基带业务信号中时，需要对调整功率后的第一训练信号Ts进行速率变换、成型滤波、削峰等处理和数字预失真处理得到第四训练信号。
当调整功率后的第一训练信号Ts添加到数字预失真处理之前的业务信号中时，需要对调整功率后的第一训练信号Ts进行数字预失真处理得到第四训练信号。
在本申请实施例中，当所述第一业务信号Sin为数字预失真处理之后的业务信号时，所述根据第二训练信号Ts_out实现信号处理包括：根据所述第二训练信号Ts_out和所述调整功率后的第一训练信号Ts实现信号处理。例如，根据第二训练信号Ts_out和调整功率后的第一训练信号Ts获取失真特征，根据失真特征修正DPD模型。
本申请实施例将训练信号添加到业务信号中来实现信号处理(例如，DPD模型的修正、运行状态的检测等)，克服了空闲时隙发送指定信号的局限性，从而提升了系统的稳定性和性能。
参见图3，本申请另一个实施例提出了一种信号处理方法，包括：
步骤310、生成第一训练信号，在信号制式不存在空闲时隙；或者，信号制式存在空闲时隙，且不允许在所述空闲时隙发送训练信号的情况下，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号。
本步骤中，生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号的实现过程与前述实施例步骤110的实现过程相同，这里不再赘述。
步骤320、采集功放输出的或后级电路反射的第二合路信号，从第二合路信号中提取出第二训练信号，根据所述第二训练信号实现信号处理。
步骤320与前述实施例步骤120的实现过程相同，这里不再赘述。
在本申请另一个实施例中，在所述信号制式存在所述空闲时隙；或者，所述信号制式存在所述空闲时隙，且允许在所述空闲时隙发送训练信号的情况下， 该方法还包括：将生成的第一训练信号添加到空闲时隙中；采集功放输出的或后级电路反射的所述空闲时隙中的第三训练信号；根据所述第三训练信号实现信号处理。实现过程与后述实施例步骤410和步骤420的实现过程相同，这里不再赘述。
参见图4，本申请另一个实施例提出了一种信号处理方法，包括：
步骤410、生成第一训练信号，在所述信号制式存在所述空闲时隙；或者，所述信号制式存在所述空闲时隙，且允许在所述空闲时隙发送训练信号的情况下，将生成的第一训练信号添加到空闲时隙中。
本步骤中，生成第一训练信号的实现过程与前述实施例步骤110中生成第一训练信号的实现过程相同，这里不再赘述。
将第一训练信号添加到空闲时隙中时，不需要对生成的第一训练信号的功率进行调整，直接添加到空闲时隙中即可。
例如，图8为本申请实施例一种分时长期演进(Time Division Long Term Evolution，TD-LTE)帧结构图。一个帧长为10ms，包含有两个半帧，总共有10个子帧，每个子帧长为1ms。第0个子帧是下行，第1个子帧是特殊子帧，特殊子帧中有一个GP(空闲时隙)位置，第2、3、4子帧是上行子帧，第5-9子帧是下行子帧。那么，第一训练信号即可发送在空闲时隙GP中，也可发送在下行业务信号的子帧中。
步骤420、采集功放输出的或后级电路反射的所述空闲时隙中的第三训练信号；根据所述第三训练信号实现信号处理。
在本申请实施例中，信号处理包括以下至少之一：修正数字预失真DPD模型、进行运行状态检测。
运行状态检测包括以下至少之一：VSWR检测、功率检测、通道新年检测(例如ACPR性能)等技术。
在本申请实施例中，在所述第一业务信号Sin为基带业务信号或数字预失真处理之前的业务信号的情况下，所述根据第三训练信号实现信号处理之前，该方法还包括：将所述调整功率后的第一训练信号Ts转换成数字预失真处理之后的第四训练信号；所述根据第三训练信号实现信号处理包括：根据所述第三训练信号和所述第四训练信号实现信号处理。例如，根据第三训练信号和第四训练信号获取失真特征，根据失真特征修正DPD模型。
在调整功率后的第一训练信号Ts添加到基带业务信号中的情况下，需要对 调整功率后的第一训练信号Ts进行速率变换、成型滤波、削峰等处理和数字预失真处理得到第四训练信号；在调整功率后的第一训练信号Ts添加到数字预失真处理之前的业务信号中的情况下，需要对调整功率后的第一训练信号Ts进行数字预失真处理得到第四训练信号。
在本申请实施例中，在所述第一业务信号Sin为数字预失真处理之后的业务信号的情况下，所述根据第三训练信号实现信号处理包括：根据所述第三训练信号和第一训练信号Ts实现信号处理。例如，根据第三训练信号和第一训练信号Ts获取失真特征，根据失真特征修正DPD模型。
本申请实施例在所述信号制式存在所述空闲时隙；或者，所述信号制式存在所述空闲时隙，且允许在所述空闲时隙发送训练信号时，才将训练信号添加到空闲时隙中来实现信号处理，克服了空闲时隙发送指定信号的局限性，从而提升了系统的稳定性和性能。
也就是说，本申请实施例能够在数据流的任何位置(包括空闲时隙和业务信号)中发送训练信号，训练信号的功率、带宽等特性是固定的，具备更宽的带宽特性，可包括更丰富的功放失真特性或反射特性，从而提升了DPD模型的修正和运行状态检测技术的稳定性及性能，适用于时分双工(Time Division Duplexing，TDD)和频分双工(Frequency Division Duplexing，FDD)所有信号制式系统。
另外，本申请实施例的信号处理方法可扩展性强，包括DPD模型的修正、电压驻波比的检测，功率检测、以及ACPR检测等等，可以大幅度减少与业务信号的耦合程度，提升了通信系统整体的稳定性和性能指标。
参见图5，本申请另一个实施例提出了一种信号处理装置，包括：信号发送模块501，设置为生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；信号采集模块502，设置为采集功放输出的或后级电路反射的第二合路信号；信号处理模块503，设置为从第二合路信号中提取出第二训练信号，并根据所述第二训练信号实现信号处理。
在本申请另一个实施例中，信号发送模块501还设置为：生成第一训练信号，在信号制式不存在空闲时隙；或者，信号制式存在空闲时隙，且不允许在所述空闲时隙发送训练信号的情况下，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号。
在本申请另一个实施例中，信号发送模块501还设置为：在所述信号制式 存在所述空闲时隙；或者，所述信号制式存在所述空闲时隙，且允许在所述空闲时隙发送训练信号的情况下，将生成的第一训练信号添加到空闲时隙中；信号采集模块502还设置为：采集功放输出的或后级电路反射的所述空闲时隙中的第三训练信号；信号处理模块503还设置为：根据所述第三训练信号实现信号处理。
在本申请实施例中，信号发送模块501是设置为采用以下方式实现所述调整第一训练信号的功率：将所述第一训练信号的功率调整为小于所述第一业务信号的平均功率。
在本申请实施例中，信号发送模块501是设置为采用以下方式实现所述生成第一训练信号：从预先存储的不同带宽的训练信号中选择带宽等于硬件配置信息中的滤波器高低频点对应的带宽的训练信号；根据硬件配置信息对选择的训练信号进行处理得到所述第一训练信号。
在本申请实施例中，信号发送模块501是设置为采用以下方式实现所述将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号：确定第一预设时间内所有信号窗内的第一业务信号的最大平均功率和最大平均功率对应的信号窗的峰值功率；其中，所述信号窗的长度大于或等于所述第一训练信号的长度；将所述调整功率后的第一训练信号添加到所述第一业务信号中满足预设条件的信号窗内得到所述第一合路信号；其中，所述预设条件包括：所述信号窗内的第一业务信号的平均功率大于或等于所述最大平均功率和β的乘积，且所述信号窗内的第一业务信号的峰值功率大于或等于所述最大平均功率对应的信号窗的峰值功率和β的乘积。
在本申请实施例中，信号发送模块501还设置为：在β大于预设门限，且连续M次寻找不到所述第一业务信号中满足预设条件的信号窗的情况下，降低β，并继续执行所述将所述调整功率后的第一训练信号添加到所述第一业务信号中满足预设条件的信号窗内得到所述第一合路信号的步骤；其中，M为大于或等于1的整数。
在本申请实施例中，信号发送模块501还设置为：在β小于或等于预设门限，且连续M次寻找不到所述第一业务信号中满足预设条件的信号窗的情况下，继续执行确定第二预设时间内所有信号窗内的第一业务信号的最大平均功率和最大平均功率对应的信号窗的峰值功率的步骤；其中，M为大于或等于1的整数。
在本申请实施例中，所述第一业务信号包括以下任意一个：基带业务信号、 数字预失真处理之前的业务信号、数字预失真处理之后的业务信号。
在本申请实施例中，信号处理模块503还设置为：从第二合路信号中提取出第二训练信号，在所述第一业务信号为基带业务信号或数字预失真处理之前的业务信号的情况下，将所述调整功率后的第一训练信号转换成数字预失真处理之后的第四训练信号；根据所述第二训练信号和所述第四训练信号实现信号处理。
在本申请实施例中，信号处理模块503是设置为：从第二合路信号中提取出第二训练信号，在所述第一业务信号为基带业务信号的情况下，根据所述第二训练信号和所述调整功率后的第一训练信号实现信号处理。
在本申请实施例中，信号处理模块503是设置为采用以下方式实现所述从第二合路信号中提取出第二训练信号：将第二合路信号分离为不包括第二训练信号的第二业务信号和包括第二训练信号的第三合路信号；根据所述第一业务信号和所述第二业务信号提取预定模型；其中，预定模型包括：功放模型；或者，数字预失真模型和功放模型；根据所述第一业务信号和预定模型计算第三合路信号中的第三业务信号；根据第三合路信号和第三业务信号计算第三合路信号中的第二训练信号。
在本申请实施例中，信号处理模块503还设置为：在所述第一业务信号为基带业务信号或数字预失真处理之前的业务信号的情况下，将所述第一业务信号转换成数字预失真处理之前的第四业务信号或数字预失真处理之后的第五业务信号；根据所述第四业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述数字预失真模型和功放模型；或者，根据所述第五业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述功放模型；根据所述第四业务信号中与所述第三合路信号对应的部分和所述数字预失真模型和功放模型计算所述第三业务信号；或者，根据所述第五业务信号中与所述第三合路信号对应的部分和所述功放模型计算所述第三业务信号。
在本申请实施例中，信号处理模块503是设置为：在所述第一业务信号为预失真处理之前的业务信号的情况下，根据所述第一业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述数字预失真模型和功放模型；根据所述第一业务信号中与所述第三合路信号对应的部分和所述数字预失真模型和功放模型计算所述第三业务信号。
在本申请实施例中，信号处理模块503是设置为：在所述第一业务信号为预失真处理之后的业务信号的情况下，根据所述第一业务信号中与所述第二业 务信号对应的部分和所述第二业务信号提取所述功放模型；根据所述第一业务信号中与所述第三合路信号对应的部分和所述功放模型计算所述第三业务信号。
在本申请实施例中，所述信号处理包括以下至少之一：修正数字预失真DPD模型、进行运行状态检测。
上述信号处理装置的实现过程与前述实施例信号处理方法的实现过程相同，这里不再赘述。
图6为本申请实施例信号处理装置的一个示意图。如图6所示，信号处理装置将训练信号添加在业务信号中，然后经过预失真模块和功放后输出，从功放输出信号中提取训练信号，此时训练信号中包含功放失真特性。可以帮助系统修正数字预失真模型，提升不同业务信号场景下的DPD稳定性和性能。
该信号处理装置包括：预失真模块、功放模块(即功率放大器)、信号选择模块、修正预失真模块。
在一实施例中，预失真模块，设置为校正功放非线性，保证功放线性输出。
功率放大器，设置为主要对射频信号进一步功率放大，最终经过滤波器和天线以电磁波形式发射到空间中。
所述信号选择模块：主要包括开关(可选，包括数字开关和/或射频开关)、环行器(可选)和耦合器。环行器设置为隔离发射信号和反射信号，利用耦合器耦合部分发射或者反射信号进入ADC模块采集。系统会根据每个功能具体需求去设置和控制数字和射频开关，从而保证整个系统正常有序工作。
修正预失真模块，设置为利用无失真的第一训练信号与功放口耦合回的第二训练信号分别提取训练信号的功放失真特性，用于预失真模型修正。
图7为本申请实施例信号处理装置的另一个示意图。如图7所示，信号处理装置将训练信号添加在业务信号中，然后经过预失真模块和功放后输出，从功放输出的信号或者后级电路的反射信号中提取训练信号，此时训练信号中包含功放失真、反射等特性。可以帮助系统进行：(1)修正数字预失真模型，提升不同业务信号场景下的DPD稳定性和性能；(2)提升不同业务信号场景下的驻波比检测稳定性；(3)提升多个业务场景下系统功率检测稳定性；(4)ACPR在线检测等等。
该信号处理装置主要包含八个模块：训练信号生成模块、训练信号检测模块、训练信号处理模块、功率检测模块、预失真模块、射频模块、功放模块(即 功率放大器)、信号选择模块、数字模拟转换器(DAC，Digital to Analog Converter)模块和模拟数字转换器(ADC，Analog to Digital Converter)模块。
所述功率检测模块，设置为实时统计当前数字信号的平均功率大小和峰值功率大小，并发送给训练信号生成模块来确定第一训练信号的相关参数，例如功率、峰均比等。
所述训练信号生成模块，设置为生成第一训练信号Ts，调整第一训练信号Ts的功率，确定调整功率后的第一训练信号Ts添加到第一业务信号Sin中的位置。
所述预失真模块，设置为校正功放非线性，保证功放线性输出。
DAC模块，设置为将数字信号转换为模拟信号。
ADC模块，设置为将模拟信号转换为数字信号。
射频模块，设置为对模拟信号进行频谱搬移和小信号放大。
功率放大器，设置为主要对射频信号进一步功率放大，最终经过滤波器和天线(即后级电路)以电磁波形式发射到空间中。
所述信号选择模块：主要包括开关(可选，包括数字开关和/或射频开关)、环行器(可选)和耦合器。环行器设置为隔离发射信号和反射信号，利用耦合器耦合部分发射或者反射信号进入ADC模块采集。系统会根据每个功能具体需求去设置和控制数字和射频开关，从而保证整个系统正常有序工作。
所述训练信号检测模块：在第一训练信号添加到第一业务信号中发送的情况下，根据预先发送的第一训练信号和所在位置的第一业务信号特征，建立业务信号功放模型，从功放输出口或者反射口耦合信号中提取出第二训练信号。
所述训练信号处理模块：利用无失真的第一训练信号与功放口或者反射口耦合回的第二训练信号分别提取训练信号的功放失真特性或者反射特性等，分别设置为预失真模型修正、驻波比计算修正等。
本申请另一个实施例提出了一种信号处理装置，包括处理器和计算机可读存储介质，所述计算机可读存储介质中存储有指令，当所述指令被所述处理器执行时，实现上述任一种信号处理方法。
本申请另一个实施例提出了一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现上述任一种信号处理方法的步骤。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、 系统、装置中的功能模块/单元可以被实施为软件、固件、硬件及其适当的组合。在硬件实施方式中，在以上描述中提及的功能模块/单元之间的划分不一定对应于物理组件的划分；例如，一个物理组件可以具有多个功能，或者一个功能或步骤可以由多个物理组件合作执行。某些组件或所有组件可以被实施为由处理器，如数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于随机访问存储器(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、带电可擦可编程只读存储器(Electrically Erasable Programmable Read Only Memory，EEPROM)、闪存或其他存储器技术、便携式紧凑磁盘只读存储器(Compact Disc Read-Only Memory，CD-ROM)、数字多功能盘(Digital Video Disc，DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。

Claims (19)

  1. 一种信号处理方法，包括：
    生成第一训练信号，调整所述第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；
    采集功放输出的或后级电路反射的第二合路信号，从第二合路信号中提取出第二训练信号，并根据所述第二训练信号实现信号处理。
  2. 根据权利要求1所述的方法，还包括：
    在信号制式不存在空闲时隙；或者，信号制式存在空闲时隙且不允许在所述空闲时隙发送训练信号的情况下，继续执行所述调整第一训练信号的功率的步骤。
  3. 根据权利要求2所述的方法，在所述信号制式存在所述空闲时隙；或者，所述信号制式存在所述空闲时隙，且允许在所述空闲时隙发送训练信号的情况下，还包括：
    将生成的所述第一训练信号添加到所述空闲时隙中；
    采集所述功放输出的或所述后级电路反射的所述空闲时隙中的第三训练信号；
    根据所述第三训练信号实现信号处理。
  4. 根据权利要求1所述的方法，其中，所述调整第一训练信号的功率包括：将所述第一训练信号的功率调整为小于所述第一业务信号的平均功率。
  5. 根据权利要求1所述的方法，其中，所述生成第一训练信号包括：
    从预先存储的不同带宽的训练信号中选择带宽等于硬件配置信息中的滤波器高低频点对应的带宽的训练信号；
    根据所述硬件配置信息对选择的训练信号进行处理得到所述第一训练信号。
  6. 根据权利要求1所述的方法，其中，所述将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号包括：
    确定第一预设时间内所有信号窗内的第一业务信号的平均功率中最大平均功率和所述最大平均功率对应的信号窗的峰值功率；其中，所述信号窗的长度大于或等于所述第一训练信号的长度；
    将所述调整功率后的第一训练信号添加到所述第一业务信号中满足预设条 件的信号窗内得到所述第一合路信号；其中，所述预设条件包括：所述信号窗内的第一业务信号的平均功率大于或等于所述最大平均功率和β的乘积，且所述信号窗内的第一业务信号的峰值功率大于或等于所述最大平均功率对应的信号窗的峰值功率和β的乘积。
  7. 根据权利要求6所述的方法，在β大于预设门限，且连续M次寻找不到所述第一业务信号中满足预设条件的信号窗的情况下，还包括：
    降低β，并继续执行所述将所述调整功率后的第一训练信号添加到所述第一业务信号中满足预设条件的信号窗内得到所述第一合路信号的步骤；
    其中，M为大于或等于1的整数。
  8. 根据权利要求6所述的方法，在β小于或等于预设门限，且连续M次寻找不到所述第一业务信号中满足预设条件的信号窗的情况下，还包括：
    继续执行确定第二预设时间内所有信号窗内的第一业务信号的平均功率中最大平均功率和最大平均功率对应的信号窗的峰值功率的步骤；
    其中，M为大于或等于1的整数。
  9. 根据权利要求1所述的方法，其中，所述第一业务信号包括以下任意一个：基带业务信号、数字预失真处理之前的业务信号、数字预失真处理之后的业务信号。
  10. 根据权利要求9所述的方法，在所述第一业务信号为基带业务信号或数字预失真处理之前的业务信号的情况下，所述根据第二训练信号实现信号处理之前，还包括：将所述调整功率后的第一训练信号转换成数字预失真处理之后的第四训练信号；
    所述根据第二训练信号实现信号处理包括：
    根据所述第二训练信号和所述第四训练信号实现信号处理。
  11. 根据权利要求9所述的方法，其中，在所述第一业务信号为基带业务信号的情况下，所述根据第二训练信号实现信号处理包括：
    根据所述第二训练信号和所述调整功率后的第一训练信号实现信号处理。
  12. 根据权利要求1所述的方法，其中，所述从第二合路信号中提取出第二训练信号包括：
    将所述第二合路信号分离为不包括第二训练信号的第二业务信号和包括第二训练信号的第三合路信号；
    根据所述第一业务信号和所述第二业务信号提取预定模型；其中，预定模型包括：功放模型；或者，数字预失真模型和功放模型；
    根据所述第一业务信号和预定模型计算第三合路信号中的第三业务信号；
    根据第三合路信号和第三业务信号计算第三合路信号中的第二训练信号。
  13. 根据权利要求12所述的方法，在所述第一业务信号为基带业务信号或数字预失真处理之前的业务信号的情况下，所述根据第一业务信号和所述第二业务信号提取预定模型之前，还包括：
    将所述第一业务信号转换成数字预失真处理之前的第四业务信号或数字预失真处理之后的第五业务信号；
    所述根据第一业务信号和所述第二业务信号提取预定模型包括：
    根据所述第四业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述数字预失真模型和功放模型；或者，根据所述第五业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述功放模型；
    所述根据第一业务信号和预定模型计算第三合路信号中的第三业务信号包括：
    根据所述第四业务信号中与所述第三合路信号对应的部分和所述数字预失真模型和功放模型计算所述第三业务信号；
    或者，根据所述第五业务信号中与所述第三合路信号对应的部分和所述功放模型计算所述第三业务信号。
  14. 根据权利要求12所述的方法，其中，在所述第一业务信号为预失真处理之前的业务信号的情况下，所述根据第一业务信号和所述第二业务信号提取预定模型包括：
    根据所述第一业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述数字预失真模型和功放模型；
    所述根据第一业务信号和预定模型计算第三合路信号中的第三业务信号包括：
    根据所述第一业务信号中与所述第三合路信号对应的部分和所述数字预失真模型和功放模型计算所述第三业务信号。
  15. 根据权利要求12所述的方法，其中，在所述第一业务信号为预失真处理之后的业务信号的情况下，所述根据第一业务信号和所述第二业务信号提取 预定模型包括：
    根据所述第一业务信号中与所述第二业务信号对应的部分和所述第二业务信号提取所述功放模型；
    所述根据第一业务信号和预定模型计算第三合路信号中的第三业务信号包括：
    根据所述第一业务信号中与所述第三合路信号对应的部分和所述功放模型计算所述第三业务信号。
  16. 根据权利要求1所述的方法，其中，所述信号处理包括以下至少之一：修正数字预失真DPD模型、进行运行状态检测。
  17. 一种信号处理装置，包括：
    信号发送模块，设置为生成第一训练信号，调整第一训练信号的功率，将调整功率后的第一训练信号添加到第一业务信号中得到第一合路信号；
    信号采集模块，设置为采集功放输出的或后级电路反射的第二合路信号；
    信号处理模块，设置为从第二合路信号中提取出第二训练信号，并根据所述第二训练信号实现信号处理。
  18. 一种信号处理装置，包括处理器和计算机可读存储介质，所述计算机可读存储介质中存储有指令，在所述指令被所述处理器执行的情况下，实现如权利要求1-16任一项所述的信号处理方法。
  19. 一种计算机可读存储介质，存储有计算机程序，在所述计算机程序被处理器执行的情况下，实现如权利要求1-16任一项所述的信号处理方法。
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