WO2019165601A1 - Method and device for detecting standing wave, and device having storage function - Google Patents

Method and device for detecting standing wave, and device having storage function Download PDF

Info

Publication number
WO2019165601A1
WO2019165601A1 PCT/CN2018/077572 CN2018077572W WO2019165601A1 WO 2019165601 A1 WO2019165601 A1 WO 2019165601A1 CN 2018077572 W CN2018077572 W CN 2018077572W WO 2019165601 A1 WO2019165601 A1 WO 2019165601A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
standing wave
reflected
reflected signal
wave detection
Prior art date
Application number
PCT/CN2018/077572
Other languages
French (fr)
Chinese (zh)
Inventor
毛孟达
吴宏星
杜建雄
Original Assignee
海能达通信股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 海能达通信股份有限公司 filed Critical 海能达通信股份有限公司
Priority to PCT/CN2018/077572 priority Critical patent/WO2019165601A1/en
Publication of WO2019165601A1 publication Critical patent/WO2019165601A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a standing wave detection method and apparatus, and a device having a storage function.
  • the connection state of the antenna feeder system is mainly determined by standing wave detection, and the channel connection from the base station to the air interface is ensured, and a good connection can effectively radiate energy from the antenna port.
  • FDR Frequency Domain Reflectometer (frequency domain reflection) technology is a commonly used online standing wave detection method.
  • the existing FDR standing wave detection method is only applicable to the wideband signal.
  • the existing FDR standing wave detection method has a slower signal-to-noise ratio improvement rate and a lower standing wave detection efficiency.
  • the technical problem to be solved by the present application is to provide a method and device for standing wave detection and a device having a storage function, which can solve the problem that the signal-to-noise ratio of the existing FDR standing wave detection method is slow.
  • a technical solution adopted by the present application is: providing a standing wave detecting method, comprising: generating a standing wave detecting signal, wherein the standing wave detecting signal includes a positive and negative alternating periodic signal; and transmitting the signal through the transmitting channel Transmitting, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal; receiving a reflected signal generated by the transmitting signal during the transmitting process; periodically inverting the reflected signal; and accumulating the reflected signal after the periodic inversion The number of times is set such that the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is greater than a preset threshold; and the system standing wave ratio is determined by the accumulated reflected signal.
  • a standing wave detecting device comprising: a signal generator for generating a standing wave detecting signal, wherein the standing wave detecting signal includes positive and negative alternating periodic signals a transmitting circuit, connected to the signal generator, for transmitting the transmitted signal through the transmitting channel, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal; the reflective receiving circuit is connected to the transmitting circuit, and the receiving transmitting signal is generated during the transmitting process.
  • a reflection signal a reflection signal
  • a signal processing circuit connected to the reflection receiving circuit for periodically inverting the reflected signal, and for accumulating the periodically inverted reflected signal by a preset number of times, so that the accumulated reflected signal is
  • the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is greater than a preset threshold, and the accumulated standing signal is used to determine the system standing wave ratio.
  • another technical solution adopted by the present application is to provide a device having a storage function, in which an instruction is stored, which is characterized in that the method is implemented as described above.
  • the beneficial effects of the present application are: different from the prior art, in some embodiments of the present application, by generating a periodic positive and negative alternating standing wave detection signal, superimposing the baseband signal to generate a transmission signal, and transmitting the transmission signal through the transmission channel Transmitting, receiving the reflected signal generated by the transmitting signal during the transmission, and periodically inverting the reflected signal, accumulating the reflected signal after the periodic inversion for a preset number of times, so that the reflected signal is accumulated
  • the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is greater than a preset threshold, and finally the system standing wave ratio is determined by using the accumulated reflected signal.
  • the present application periodically inverts the reflected signal, so that after the standing wave detection signal is superimposed a plurality of times in the inverted reflected signal, the power increase rate is greater than the power increase rate of the baseband signal, thereby improving the signal to noise ratio. Faster, improve the efficiency of standing wave detection.
  • FIG. 1 is a schematic flow chart of a first embodiment of a standing wave detecting method of the present application
  • 2 is a waveform diagram of a standing wave detection signal
  • step S14 in FIG. 1 is a schematic diagram of a specific process of step S14 in FIG. 1;
  • FIG. 4 is a schematic diagram showing waveforms of a standing wave detection signal and a baseband signal before and after inversion in a reflected signal;
  • FIG. 5 is a schematic diagram of a specific process of step S16 in FIG. 1;
  • FIG. 6 is a schematic flow chart of a second embodiment of the standing wave detecting method of the present application.
  • FIG. 7 is a schematic flow chart of a third embodiment of the standing wave detecting method of the present application.
  • FIG. 8 is a schematic structural view of a first embodiment of a standing wave detecting device of the present application.
  • FIG. 9 is a schematic structural view of a standing wave detecting device of the present application.
  • Figure 10 is a schematic structural view of a second embodiment of the standing wave detecting device of the present application.
  • Figure 11 is a schematic structural view of a third embodiment of the standing wave detecting device of the present application.
  • FIG. 12 is a schematic structural diagram of an embodiment of an apparatus having a storage function according to the present application.
  • the first embodiment of the standing wave detecting method of the present application includes:
  • the standing wave detection signal includes positive and negative alternating periodic signals.
  • the positive and negative alternating periodic signals mean that the amplitude of the signal is positive and negative alternately in one cycle, and the durations of the positive amplitude and the negative amplitude may be the same or different, and the specific period may also be set according to actual conditions. This is not specifically limited.
  • the generated standing wave detection signal period is 2T, wherein the signals in one T time are positive amplitudes a1, a2, ..., a512, and the other T time
  • the signal is a negative amplitude -a1, -a2 ... -a512.
  • S12 transmitting, by using a transmit channel, the transmit signal includes a standing wave detection signal and a baseband signal;
  • the baseband signal may be a narrowband signal or a wideband signal, which is not specifically limited herein.
  • the embodiment of the present application is described by taking a narrowband signal as an example.
  • the standing wave detection signal and the baseband signal may be superimposed by an adder to obtain the transmitted signal, and then the transmitted signal may be transmitted through the transmitting channel.
  • the transmission channel includes but is not limited to a signal processing device, such as DPD (Digital Pre-Distortion, digital pre-distortion circuits, digital-to-analog converter DACs, etc., and transmitting devices such as transmitter TX, duplexer DUP, and antenna.
  • DPD Digital Pre-Distortion, digital pre-distortion circuits, digital-to-analog converter DACs, etc.
  • transmitting devices such as transmitter TX, duplexer DUP, and antenna.
  • the standing wave detection when performing the standing wave detection, before transmitting the transmitting signal, it is necessary to suspend the functions of the DPD, the power control, and the like that affect the channel state of the system, thereby avoiding the accuracy of the standing wave detection due to the system channel state change.
  • the reflected signal includes a reflected signal of the baseband signal and a reflected signal of the standing wave detection signal.
  • the receiving end of the reflected signal is at a certain position before the transmitting signal is transmitted to the antenna, for example, a position between the transmitter TX and the duplexer DUP, and a reflected signal receiving point is disposed, which can receive the The signal is reflected and analog-to-digital converted.
  • periodically inverting the signal means changing the amplitude of the signal from positive to negative or from negative to positive.
  • the inversion period and the inversion duration of the reflected signal are related to the period of the standing wave detection signal and the duration of the positive and negative amplitudes.
  • the inversion period may be the same as the period of the standing wave detection signal, and the inversion duration may be the same as the duration of the positive or negative amplitude of the standing wave detection signal.
  • step S14 includes:
  • S141 Periodically invert at least part of the negative signal of the reflected signal of the standing wave detection signal into a positive signal.
  • S142 Periodically inverting at least part of the positive signal of the reflected signal of the baseband signal in the reflected signal to a negative signal, so that the reflected signals of the baseband signal in the accumulated reflected signal at least partially cancel each other.
  • the reflected signal includes a reflected signal A1 of the standing wave detecting signal and a reflected signal B1 of the baseband signal.
  • the waveforms of the A1 signal and the B1 signal are respectively as shown in FIG. 4 (FIG. 4) a) and 4(b), the inversion period is set to the period 2T of the standing wave detection signal, the inversion duration is set to T, and the inversion starting point is set to (2n+1)T time, where n is an integer.
  • the A2 signal and the B2 signal waveform after the A1 signal and the B1 signal are inverted are as shown in Figs.
  • the negative amplitude portion of the A1 signal can be inverted to a positive amplitude value.
  • the partial positive amplitude of the B2 signal is inverted to a negative amplitude, that is, after the inversion, the amplitude of the A2 signal is mostly one of a positive amplitude and a negative amplitude, so that the B2 signal becomes a positive and negative alternating signal, and
  • the positive and negative amplitude durations are basically the same.
  • the positive amplitude portion of the A1 signal may be inverted to a negative amplitude
  • the partial negative amplitude of the B1 signal may be inverted to a positive amplitude.
  • S15 accumulating the reflected signal after the periodic inversion by a preset number of times, so that the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is greater than a preset threshold;
  • the preset number of times is an accumulated number of times preset according to a signal to noise ratio of the standing wave detection, for example, 200 times.
  • the preset threshold is a signal to noise ratio threshold set according to the standing wave detection requirement of the antenna feeder system, for example, 50 dB or 60 dB.
  • the reflected signal includes a reflected signal of the standing wave detecting signal and a reflected signal of the baseband signal, and when the inverted reflected signal is segmented and accumulated for a preset number of times, it can be regarded as a standing wave detecting signal.
  • the reflected signal and the reflected signal of the baseband signal are separately segmented and accumulated.
  • a half cycle of the B2 signal is a segment, that is, The A2 signal and the B2 signal are divided into 0-T, T-2T, ..., and then N+1 segments are accumulated, that is, the reflected signals are accumulated N times. Since the A2 signal in the reflected signal after the inversion is a positive signal, after the cumulative N times, the amplitude is increased by N times, the power is increased by N2 times, and the B2 signal is a positive and negative alternating signal, and is divided. When the segment is accumulated, when N is an odd number, after the cumulative N times, the amplitude is 0, that is, the signals cancel each other out.
  • the ratio of the sum of the reflected signal A2 of the standing wave detection signal and the reflected signal B2 of the baseband signal in the reflected signal is larger and larger, and finally the ratio, that is, the reflected signal of the accumulated standing wave detection signal, can be made.
  • the signal-to-noise ratio of the reflected signal of the baseband signal is greater than a preset threshold (eg, 50 dB).
  • the baseband signal is a narrowband signal
  • the data rate of the narrowband signal is low, and the correlation is strong for a long period of time
  • the reflected signals of the narrowband signal can cancel each other after the inverse accumulation by the above method.
  • the baseband signal may also be a wideband signal, and the data in the wideband signal is uncorrelated.
  • the reversed accumulation of the broadband signal by the above method does not cancel the reflected signal of the wideband signal, but the power increase range thereof Slower, less than the growth amplitude of the reflected signal of the standing wave detection signal.
  • the above method can also make the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal faster than the preset threshold. .
  • the standing wave ratio of the system is the standing wave ratio of the antenna feeder system. Since the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is faster than a preset threshold, the baseband signal is substantially negligible. In this case, the accumulated The reflected signal determines the standing wave ratio of the system.
  • step S16 includes:
  • the channel response of the system may be a time domain response or a frequency domain response, which is not specifically limited herein.
  • the channel response of the system is the response from the channel between the transmission of the standing wave detection signal to the accumulation of the reflected signal.
  • the initial channel response is a channel response when the system is pre-tested, that is, the initial channel response obtained by the pre-test when the antenna feeder system is initially unconnected.
  • the initial channel response can also be a time domain response or a frequency domain response.
  • the accumulated reflection signal and the initially generated standing wave detection signal may be used to calculate a channel response of the system, such as a time domain response, and then obtain a peak of the time domain response of the system and the initial The peak value of the channel time domain response is calculated as the peak ratio of the two, and finally the peak ratio is the standing wave ratio of the system.
  • the system standing wave ratio can also be determined by the frequency domain response.
  • the following can be simulated by the standing wave detection method of the present application.
  • the input baseband signal is Tetra 5kbps IQ data
  • the reflected signal is periodically inverted, so that after the standing wave detection signal is superimposed a plurality of times in the inverted reflected signal, the power increase rate is greater than the power increase rate of the baseband signal, thereby improving the signal to noise ratio. Fast, improve the efficiency of standing wave detection.
  • the second embodiment of the standing wave detecting method of the present application is based on the first embodiment of the standing wave detecting method of the present application, and steps S161 and S162 further include:
  • S1611 performing fast Fourier transform on the accumulated reflected signal and the standing wave detection signal, respectively, to obtain a frequency domain signal of the accumulated reflected signal and a frequency domain signal of the standing wave detection signal, respectively;
  • S1612 calculating a channel frequency response of the system by using the frequency domain signal of the accumulated reflected signal and the frequency domain signal of the standing wave detection signal;
  • the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is faster than a preset threshold, that is, the baseband signal is substantially negligible.
  • the accumulated reflected signal is regarded as a reflected signal of the accumulated standing wave detection signal, and is recorded as a y signal.
  • the initially transmitted standing wave detection signal can be recorded as an x signal, and the accumulated reflected signal y and the standing wave detection signal x can be respectively subjected to fast Fourier transform, and the frequency domain signal FFT of the accumulated reflected signal can be respectively obtained.
  • the reflected signal may be time-delayed before the reflected signal is periodically inverted, so that the inversion starting point is close to the positive and negative amplitude of the reflected signal of the standing wave detecting signal in the reflected signal.
  • the conversion point of the value which in turn reduces the impact of channel delay on subsequent accumulation.
  • the third embodiment of the standing wave detecting method of the present application is based on the first embodiment of the standing wave detecting method of the present application.
  • the method further includes:
  • the reflected signal that may be received may not be the first data transmitted, for example, the first transmitted by the standing wave detection signal A1 in FIG. 4(a)
  • One data is a1.
  • the first data of the reflected signal A2 of the standing wave detection signal in the received reflected signal is not a1, and may be a5 or a10.
  • the amplitude of the reflected signal A2 of the standing wave detection signal is mostly positive amplitude or negative amplitude, and the reflection signal needs to be acquired. Delay for time delay alignment.
  • the time difference between the received first data and the data with the same amplitude in the next cycle may be obtained by periodically comparing the received reflected signals, and the time difference is subtracted.
  • the period of the reflected signal that is, the delay of the reflected signal can be obtained.
  • a signal obtained by passing a known signal through the transmission channel may be pre-compared with the originally transmitted known signal to obtain a delay of the transmission channel as a delay of the reflected signal.
  • other delay calculation methods may also be used, such as formula calculation, etc., which are not specifically limited herein.
  • the reflected signal may be time-aligned, for example, the delay of the reflected signal is delayed, and then the delay is aligned, and then performed.
  • the inversion starting point of each period may coincide with the starting point of the negative amplitude of each period in the reflected signal of the standing wave detecting signal.
  • the delay data may have an error, and the reflected signal obtained after the time delay is aligned, when the periodic inversion is performed, the inversion starting point of each period is close to each period of the reflected signal of the standing wave detecting signal. The starting point of the negative amplitude, that is, does not coincide.
  • the reflected signal delay of the standing wave detection signal in Fig. 4(e) is aligned and the inversion starting point is -a2 instead of -a1.
  • the error does not exceed the allowable range (For example, 1/5 cycles)
  • the periodic characteristic of the reflected signal of the standing wave detecting signal still exists, for example, the reflected signal of the standing wave detecting signal in FIG. 4(f) is reversed.
  • the periodicity still exists, but the period becomes T, and the subsequent accumulation can still achieve the purpose of improving the signal-to-noise ratio. Therefore, the use of simpler delay alignment can achieve the purpose of improving the signal-to-noise ratio without excessively increasing the computational complexity of the system.
  • the first embodiment 30 of the standing wave detecting apparatus of the present application includes:
  • a signal generator 301 configured to generate a standing wave detection signal, where the standing wave detection signal includes a positive and negative alternating periodic signal;
  • the transmitting circuit 302 is connected to the signal generator 301 for transmitting the transmitting signal through the transmitting channel, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal;
  • the reflection receiving circuit 303 is connected to the transmitting circuit 302 for receiving the reflected signal generated by the transmitting signal during the transmission process;
  • the signal processing circuit 304 is connected to the reflection receiving circuit 303 for periodically inverting the reflected signal, and is also used for accumulating the periodically inverted reflected signal by a preset number of times, so that the standing wave detection is performed in the accumulated reflected signal.
  • the signal-to-noise ratio of the reflected signal of the signal and the reflected signal of the baseband signal is greater than a preset threshold, and the VSWR is determined by a frequency domain reflection method using the accumulated reflected signal.
  • the signal processing circuit 304 further includes:
  • the signal inversion circuit 3041 is configured to invert at least a portion of the negative amplitude of the reflected signal of the standing wave detection signal to a positive amplitude value.
  • the signal inversion circuit 3041 is further configured to invert at least a portion of the positive amplitude of the reflected signal of the baseband signal in the reflected signal to a negative amplitude such that the reflected signals of the baseband signal in the accumulated reflected signal at least partially cancel each other.
  • the standing wave detecting device 30 may further include a transmitting channel and a feedback channel, including but not limited to a digital pre-distortion DPD, a digital-to-analog converter DAC, and a transmitter.
  • a transmitting channel and a feedback channel including but not limited to a digital pre-distortion DPD, a digital-to-analog converter DAC, and a transmitter.
  • the signal generator 301 can also generate a baseband signal, and the standing wave detection signal can also be directly stored in a memory (for example, RAM (Random-Access). The data in the memory (random access memory)) only needs to be superimposed on the baseband signal by the adder for transmission.
  • RAM Random-Access
  • the standing wave detection signal when the standing wave detection data is superimposed on the baseband signal, the standing wave detection signal can also be subjected to gain/power control Gain.
  • the signal processing circuit 304 can also be directly a signal processing chip, which can also be integrated with the signal inversion circuit 3041, AAC, FFT circuit, and standing wave ratio calculation circuit.
  • the specific function implementation process of the foregoing components may refer to the content of any one of the first to third embodiments of the present application, and is not repeated here.
  • the second embodiment 40 of the standing wave detecting device of the present application is similar to the first embodiment of the standing wave detecting device of the present application, except that the standing wave detecting device 40 of the present embodiment further includes: a delay
  • the alignment circuit 305 is coupled between the reflection receiving circuit 303 and the signal processing circuit 304 for calculating the time delay of the reflected signal, and delaying the reflected signal to make each periodicity of the reflected signal after the time delay is aligned.
  • the inversion starting point is close to the starting point of the negative amplitude in the reflected signal of the standing wave detection signal.
  • the specific process of the delay alignment circuit 305 for calculating the reflected signal delay and the delay of the reflected signal may be referred to the method provided by the third embodiment of the standing wave detecting method of the present application, and is not repeated here.
  • the third embodiment 50 of the standing wave detecting device of the present application is similar to the first embodiment of the standing wave detecting device of the present application, except that the signal processing is performed in the standing wave detecting device 50 of the present embodiment.
  • Circuitry 304 further includes:
  • a channel response calculation circuit 3042 configured to calculate a channel response of the system by using the accumulated reflected signal
  • the standing wave ratio calculation circuit 3043 is connected to the channel response calculation circuit 3042 for comparing the channel response of the system with the initial channel response to determine the system standing wave ratio.
  • the channel response calculation circuit 306 is further configured to perform fast Fourier transform on the accumulated reflected signal and the standing wave detection signal respectively, and utilizes the obtained frequency domain signal of the accumulated reflected signal and the standing wave detection signal.
  • the frequency domain signal calculates a channel frequency response of the system, and performs fast Fourier transform on the channel frequency response to obtain a time domain response of the channel of the system;
  • the standing wave ratio calculation circuit 3043 is specifically configured to compare the peak value of the channel time domain response of the system with the peak value of the initial channel time domain response to obtain a system standing wave ratio.
  • the specific process of calculating the VSWR of the channel response calculation circuit 3042 and the standing wave ratio calculation circuit 3043 can refer to the methods provided by the first and second embodiments of the standing wave detection method of the present application. repeat.
  • the standing wave detecting device may further include a delay alignment circuit, and the delay alignment circuit is connected to the reflection receiving circuit and the signal processing circuit, wherein the specific working process of the delay alignment circuit may refer to the present application.
  • Wave detection method The method provided by the third embodiment is not repeated here.
  • the device 60 having a storage function stores an instruction 601, and when the instruction is executed, the first to third embodiments of the standing wave detection method of the present application are implemented.
  • the device 60 having a storage function may be a portable storage medium such as a USB flash drive or an optical disk, or may be a base station, a server, or a separate component that can be integrated into the base station, such as a control chip or the like.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Disclosed are a method and device for detecting a standing wave, and a device having a storage function, the method comprising: generating a standing wave detection signal that periodically alternates between positive and negative; generating a transmitting signal after superimposing baseband signals; sending the transmitting signal through a transmitting channel; receiving a reflected signal generated by the transmitting signal during transmission, and periodically inverting the reflected signal; accumulating the periodically inverted reflected signal a preset number of times, such that the signal-to-noise ratio of a reflected signal of the standing wave detection signal and a reflected signal of the baseband signal in the accumulated reflected signals is greater than a preset threshold; and finally, utilizing the accumulated reflected signals to determine a system standing wave ratio. By means of the described method, the present application may improve the signal-to-noise ratio more quickly and improve the efficiency of standing wave detection.

Description

一种驻波检测方法、装置及具有存储功能的装置 Standing wave detecting method, device and device with storage function
【技术领域】[Technical Field]
本申请涉及通信技术领域，特别是涉及一种驻波检测方法、装置及具有存储功能的装置。The present application relates to the field of communications technologies, and in particular, to a standing wave detection method and apparatus, and a device having a storage function.
【背景技术】 【Background technique】
现有通信***中，主要通过驻波检测来判断天馈***的连接状况，确保从基站到空口的通道连接正常，良好的连接能有效的将能量从天线口辐射出去。FDR（Frequency Domain Reflectometer，频域反射）技术是常用的在线驻波检测方法。但是，现有的FDR驻波检测方法仅适用于宽带信号，对于窄带信号，现有的FDR驻波检测方法信噪比提升速度慢，驻波检测效率低。In the existing communication system, the connection state of the antenna feeder system is mainly determined by standing wave detection, and the channel connection from the base station to the air interface is ensured, and a good connection can effectively radiate energy from the antenna port. FDR (Frequency Domain Reflectometer (frequency domain reflection) technology is a commonly used online standing wave detection method. However, the existing FDR standing wave detection method is only applicable to the wideband signal. For the narrowband signal, the existing FDR standing wave detection method has a slower signal-to-noise ratio improvement rate and a lower standing wave detection efficiency.
【发明内容】 [Summary of the Invention]
本申请主要解决的技术问题是提供一种驻波检测方法、装置及具有存储功能的装置，能够解决现有的FDR驻波检测方法信噪比提升速度慢的问题。The technical problem to be solved by the present application is to provide a method and device for standing wave detection and a device having a storage function, which can solve the problem that the signal-to-noise ratio of the existing FDR standing wave detection method is slow.
为解决上述技术问题，本申请采用的一个技术方案是：提供一种驻波检测方法，包括：生成驻波检测信号，该驻波检测信号包括正负交替的周期信号；将发射信号通过发射通道进行发送，其中发射信号包括驻波检测信号和基带信号；接收该发射信号在传输过程中产生的反射信号；将该反射信号进行周期性反转；将周期性反转后的该反射信号累加预设次数，以使得累加后的反射信号中该驻波检测信号的反射信号与该基带信号的反射信号的信噪比大于预设阈值；利用累加后的反射信号确定***驻波比。In order to solve the above technical problem, a technical solution adopted by the present application is: providing a standing wave detecting method, comprising: generating a standing wave detecting signal, wherein the standing wave detecting signal includes a positive and negative alternating periodic signal; and transmitting the signal through the transmitting channel Transmitting, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal; receiving a reflected signal generated by the transmitting signal during the transmitting process; periodically inverting the reflected signal; and accumulating the reflected signal after the periodic inversion The number of times is set such that the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is greater than a preset threshold; and the system standing wave ratio is determined by the accumulated reflected signal.
为解决上述技术问题，本申请采用的另一个技术方案是：提供一种驻波检测装置，包括：信号生成器，用于生成驻波检测信号，该驻波检测信号包括正负交替的周期信号；发射电路，连接信号生成器，用于将发射信号通过发射通道进行发送，其中发射信号包括驻波检测信号和基带信号；反射接收电路，连接发射电路，用于接收发射信号在传输过程中产生的反射信号；信号处理电路，连接反射接收电路，用于将反射信号进行周期性反转，还用于将周期性反转后的反射信号累加预设次数，以使得累加后的反射信号中该驻波检测信号的反射信号与该基带信号的反射信号的信噪比大于预设阈值，并利用累加后的反射信号确定***驻波比。In order to solve the above technical problem, another technical solution adopted by the present application is to provide a standing wave detecting device, comprising: a signal generator for generating a standing wave detecting signal, wherein the standing wave detecting signal includes positive and negative alternating periodic signals a transmitting circuit, connected to the signal generator, for transmitting the transmitted signal through the transmitting channel, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal; the reflective receiving circuit is connected to the transmitting circuit, and the receiving transmitting signal is generated during the transmitting process. a reflection signal; a signal processing circuit connected to the reflection receiving circuit for periodically inverting the reflected signal, and for accumulating the periodically inverted reflected signal by a preset number of times, so that the accumulated reflected signal is The signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is greater than a preset threshold, and the accumulated standing signal is used to determine the system standing wave ratio.
为解决上述技术问题，本申请采用的又一个技术方案是：提供一种具有存储功能的装置，存储有指令，其特征在于，该指令被执行时实现如上所述的方法。In order to solve the above technical problem, another technical solution adopted by the present application is to provide a device having a storage function, in which an instruction is stored, which is characterized in that the method is implemented as described above.
本申请的有益效果是：区别于现有技术的情况，本申请的部分实施例中，通过生成周期性正负交替的驻波检测信号，叠加基带信号后产生发射信号，将发射信号通过发射通道进行发送，接收该发射信号在传输过程中产生的反射信号，并将该反射信号进行周期性反转，将周期性反转后的该反射信号累加预设次数，以使得累加后的反射信号中该驻波检测信号的反射信号与该基带信号的反射信号的信噪比大于预设阈值，最后利用累加后的反射信号确定***驻波比。通过上述方式，本申请将反射信号周期性反转，使得反转后的反射信号中驻波检测信号叠加多次后，其功率增速大于基带信号的功率增速，从而可以使得信噪比提升较快，提高驻波检测的效率。The beneficial effects of the present application are: different from the prior art, in some embodiments of the present application, by generating a periodic positive and negative alternating standing wave detection signal, superimposing the baseband signal to generate a transmission signal, and transmitting the transmission signal through the transmission channel Transmitting, receiving the reflected signal generated by the transmitting signal during the transmission, and periodically inverting the reflected signal, accumulating the reflected signal after the periodic inversion for a preset number of times, so that the reflected signal is accumulated The signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is greater than a preset threshold, and finally the system standing wave ratio is determined by using the accumulated reflected signal. In the above manner, the present application periodically inverts the reflected signal, so that after the standing wave detection signal is superimposed a plurality of times in the inverted reflected signal, the power increase rate is greater than the power increase rate of the baseband signal, thereby improving the signal to noise ratio. Faster, improve the efficiency of standing wave detection.
【附图说明】 [Description of the Drawings]
图1是本申请驻波检测方法第一实施例的流程示意图；1 is a schematic flow chart of a first embodiment of a standing wave detecting method of the present application;
图2是驻波检测信号的波形示意图；2 is a waveform diagram of a standing wave detection signal;
图3是图1中步骤S14的具体流程示意图；3 is a schematic diagram of a specific process of step S14 in FIG. 1;
图4是反射信号中驻波检测信号和基带信号反转前和反转后的波形示意图；4 is a schematic diagram showing waveforms of a standing wave detection signal and a baseband signal before and after inversion in a reflected signal;
图5是图1中步骤S16的具体流程示意图；FIG. 5 is a schematic diagram of a specific process of step S16 in FIG. 1;
图6是本申请驻波检测方法第二实施例的流程示意图；6 is a schematic flow chart of a second embodiment of the standing wave detecting method of the present application;
图7是本申请驻波检测方法第三实施例的流程示意图；7 is a schematic flow chart of a third embodiment of the standing wave detecting method of the present application;
图8是本申请驻波检测装置第一实施例的结构示意图；8 is a schematic structural view of a first embodiment of a standing wave detecting device of the present application;
图9是本申请驻波检测装置一具体结构示意图；9 is a schematic structural view of a standing wave detecting device of the present application;
图10是本申请驻波检测装置第二实施例的结构示意图；Figure 10 is a schematic structural view of a second embodiment of the standing wave detecting device of the present application;
图11是本申请驻波检测装置第三实施例的结构示意图；Figure 11 is a schematic structural view of a third embodiment of the standing wave detecting device of the present application;
图12是本申请具有存储功能的装置一实施例的结构示意图。FIG. 12 is a schematic structural diagram of an embodiment of an apparatus having a storage function according to the present application.
【具体实施方式】【Detailed ways】
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.
如图1所示，本申请驻波检测方法第一实施例包括：As shown in FIG. 1, the first embodiment of the standing wave detecting method of the present application includes:
S11：生成驻波检测信号；S11: generating a standing wave detection signal;
其中，该驻波检测信号包括正负交替的周期信号。该正负交替的周期信号是指一个周期内该信号的幅值是正负交替的，其正幅值和负幅值的持续时间可以相同，也可以不同，具体周期也可以根据实际情况设置，此处不做具体限定。The standing wave detection signal includes positive and negative alternating periodic signals. The positive and negative alternating periodic signals mean that the amplitude of the signal is positive and negative alternately in one cycle, and the durations of the positive amplitude and the negative amplitude may be the same or different, and the specific period may also be set according to actual conditions. This is not specifically limited.
具体地，在一个应用例中，如图2所示，生成的驻波检测信号周期为2T，其中，一个T时间内的信号为正幅值a1、a2……a512，另一个T时间内的信号为负幅值-a1、-a2……-a512。Specifically, in an application example, as shown in FIG. 2, the generated standing wave detection signal period is 2T, wherein the signals in one T time are positive amplitudes a1, a2, ..., a512, and the other T time The signal is a negative amplitude -a1, -a2 ... -a512.
S12：将发射信号通过发射通道进行发送，其中发射信号包括驻波检测信号和基带信号；S12: transmitting, by using a transmit channel, the transmit signal includes a standing wave detection signal and a baseband signal;
其中，该基带信号可以是窄带信号，也可以是宽带信号，此处不做具体限定。本申请的实施例以窄带信号为例进行说明。The baseband signal may be a narrowband signal or a wideband signal, which is not specifically limited herein. The embodiment of the present application is described by taking a narrowband signal as an example.
具体地，在一个应用例中，可以通过一加法器将该驻波检测信号与基带信号进行叠加后，得到该发射信号，然后可以通过发射通道将该发射信号发送出去。其中，该发射通道包括但不限于信号处理器件，例如DPD（Digital Pre-Distortion，数字预失真）电路、数模转换器DAC等，和发射器件，例如发射器TX、双工器DUP和天线等。Specifically, in an application example, the standing wave detection signal and the baseband signal may be superimposed by an adder to obtain the transmitted signal, and then the transmitted signal may be transmitted through the transmitting channel. Wherein, the transmission channel includes but is not limited to a signal processing device, such as DPD (Digital Pre-Distortion, digital pre-distortion circuits, digital-to-analog converter DACs, etc., and transmitting devices such as transmitter TX, duplexer DUP, and antenna.
可选地，在进行驻波检测时，发送该发射信号之前，需要先暂停DPD、功率控制等会影响***通道状态的功能，避免由于***通道状态改变影响驻波检测准确率。Optionally, when performing the standing wave detection, before transmitting the transmitting signal, it is necessary to suspend the functions of the DPD, the power control, and the like that affect the channel state of the system, thereby avoiding the accuracy of the standing wave detection due to the system channel state change.
S13：接收该发射信号在传输过程中产生的反射信号；S13: receiving a reflected signal generated by the transmitting signal during transmission;
其中，该反射信号包括基带信号的反射信号和驻波检测信号的反射信号。The reflected signal includes a reflected signal of the baseband signal and a reflected signal of the standing wave detection signal.
具体地，该反射信号的接收端是在该发射信号传输到天线前的某个位置，例如发射器TX和双工器DUP之间的某个位置，设置有一个反射信号接收点，可以接收该反射信号，并将其进行模数转换。Specifically, the receiving end of the reflected signal is at a certain position before the transmitting signal is transmitted to the antenna, for example, a position between the transmitter TX and the duplexer DUP, and a reflected signal receiving point is disposed, which can receive the The signal is reflected and analog-to-digital converted.
S14：将该反射信号进行周期性反转；S14: periodically inverting the reflected signal;
其中，将信号进行周期性反转是指将该信号的幅值从正改为负或从负改为正。该反射信号的反转周期以及反转持续时间与该驻波检测信号的周期和正负幅值的持续时间相关。该反转周期可以与该驻波检测信号的周期相同，该反转持续时间可以与该驻波检测信号的正幅值或负幅值的持续时间相同。Among them, periodically inverting the signal means changing the amplitude of the signal from positive to negative or from negative to positive. The inversion period and the inversion duration of the reflected signal are related to the period of the standing wave detection signal and the duration of the positive and negative amplitudes. The inversion period may be the same as the period of the standing wave detection signal, and the inversion duration may be the same as the duration of the positive or negative amplitude of the standing wave detection signal.
可选地，如图3所示，步骤S14包括：Optionally, as shown in FIG. 3, step S14 includes:
S141：将驻波检测信号的反射信号的至少部分负信号周期性反转为正信号。S141: Periodically invert at least part of the negative signal of the reflected signal of the standing wave detection signal into a positive signal.
S142：将反射信号中基带信号的反射信号的至少部分正信号周期性反转为负信号，以使得累加后反射信号中基带信号的反射信号至少部分相互抵消。S142: Periodically inverting at least part of the positive signal of the reflected signal of the baseband signal in the reflected signal to a negative signal, so that the reflected signals of the baseband signal in the accumulated reflected signal at least partially cancel each other.
具体地，在一个应用例中，如图4所示，反射信号包括驻波检测信号的反射信号A1以及基带信号的反射信号B1，反转前，A1信号和B1信号波形图分别如图4（a）、4（b）所示，反转周期设置为驻波检测信号的周期2T，反转持续时间设置为T，反转起始点设置为（2n+1）T时刻，其中n为整数，则A1信号和B1信号反转后的A2信号和B2信号波形分别如图4（c）、4（d）所示，由此可以将A1信号的负幅值部分反转为正幅值，将B2信号的部分正幅值反转为负幅值，即反转后使得A2信号幅值大部分均为正幅值和负幅值中的一个，而使得B2信号成为正负交替的信号，且正负幅值持续时间基本相同。当然，在其他应用例中，也可以将该A1信号的正幅值部分反转为负幅值，将B1信号的部分负幅值反转为正幅值。Specifically, in an application example, as shown in FIG. 4, the reflected signal includes a reflected signal A1 of the standing wave detecting signal and a reflected signal B1 of the baseband signal. Before the inversion, the waveforms of the A1 signal and the B1 signal are respectively as shown in FIG. 4 (FIG. 4) a) and 4(b), the inversion period is set to the period 2T of the standing wave detection signal, the inversion duration is set to T, and the inversion starting point is set to (2n+1)T time, where n is an integer. Then, the A2 signal and the B2 signal waveform after the A1 signal and the B1 signal are inverted are as shown in Figs. 4(c) and 4(d), respectively, whereby the negative amplitude portion of the A1 signal can be inverted to a positive amplitude value. The partial positive amplitude of the B2 signal is inverted to a negative amplitude, that is, after the inversion, the amplitude of the A2 signal is mostly one of a positive amplitude and a negative amplitude, so that the B2 signal becomes a positive and negative alternating signal, and The positive and negative amplitude durations are basically the same. Of course, in other applications, the positive amplitude portion of the A1 signal may be inverted to a negative amplitude, and the partial negative amplitude of the B1 signal may be inverted to a positive amplitude.
S15：将周期性反转后的反射信号累加预设次数，以使得累加后的反射信号中驻波检测信号的反射信号与基带信号的反射信号的信噪比大于预设阈值；S15: accumulating the reflected signal after the periodic inversion by a preset number of times, so that the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is greater than a preset threshold;
其中，该预设次数是根据驻波检测的信噪比预先设置的累加次数，例如200次等。该预设阈值是根据天馈***驻波检测需求设置的信噪比阈值，例如50dB或60dB。The preset number of times is an accumulated number of times preset according to a signal to noise ratio of the standing wave detection, for example, 200 times. The preset threshold is a signal to noise ratio threshold set according to the standing wave detection requirement of the antenna feeder system, for example, 50 dB or 60 dB.
具体地，在一个应用例中，反射信号包括驻波检测信号的反射信号和基带信号的反射信号，将反转后的反射信号进行分段累加预设次数时，可以看成将驻波检测信号的反射信号和基带信号的反射信号分别进行分段累加。例如，将图4（c）、4（d）中的驻波检测信号的反射信号A2信号和基带信号的反射信号B2信号分为多个段，如以B2信号的半个周期为一段，即将A2信号和B2信号分为0-T、T-2T……多个段，然后累加N+1个段，即将反射信号累加N次。由于该反转后的反射信号中A2信号均为正信号，则累加N次后，其幅值增大为N倍，功率增大为N2倍，而由于B2信号为正负交替信号，进行分段累加时，当N为奇数时，累加N次后，其幅值为0，即信号相互抵消，当N为偶数时，累加N次后其幅值不变。因此，反射信号中驻波检测信号的反射信号A2与基带信号的反射信号B2累加后的功率的比值会越来越大，最终可以使得该比值，即累加后的驻波检测信号的反射信号与基带信号的反射信号的信噪比大于预设阈值（如50dB）。Specifically, in an application example, the reflected signal includes a reflected signal of the standing wave detecting signal and a reflected signal of the baseband signal, and when the inverted reflected signal is segmented and accumulated for a preset number of times, it can be regarded as a standing wave detecting signal. The reflected signal and the reflected signal of the baseband signal are separately segmented and accumulated. For example, the reflected signal A2 signal of the standing wave detection signal and the reflected signal B2 signal of the baseband signal in FIGS. 4(c) and 4(d) are divided into a plurality of segments, for example, a half cycle of the B2 signal is a segment, that is, The A2 signal and the B2 signal are divided into 0-T, T-2T, ..., and then N+1 segments are accumulated, that is, the reflected signals are accumulated N times. Since the A2 signal in the reflected signal after the inversion is a positive signal, after the cumulative N times, the amplitude is increased by N times, the power is increased by N2 times, and the B2 signal is a positive and negative alternating signal, and is divided. When the segment is accumulated, when N is an odd number, after the cumulative N times, the amplitude is 0, that is, the signals cancel each other out. When N is an even number, the amplitude does not change after N times. Therefore, the ratio of the sum of the reflected signal A2 of the standing wave detection signal and the reflected signal B2 of the baseband signal in the reflected signal is larger and larger, and finally the ratio, that is, the reflected signal of the accumulated standing wave detection signal, can be made. The signal-to-noise ratio of the reflected signal of the baseband signal is greater than a preset threshold (eg, 50 dB).
本实施例中，由于基带信号是窄带信号，窄带信号的数据变化率低，在一段较长时间内相关性强，采用上述方法反向累加多次后该窄带信号的反射信号可以相互抵消。在其他实施例中，该基带信号也可以是宽带信号，宽带信号中各数据之间的不相关，采用上述方法反向累加多次后该宽带信号的反射信号不会抵消，但其功率增长幅度较慢，小于驻波检测信号的反射信号的增长幅度，采用上述方法同样可以使得累加后的反射信号中驻波检测信号的反射信号与基带信号的反射信号的信噪比较快大于预设阈值。In this embodiment, since the baseband signal is a narrowband signal, the data rate of the narrowband signal is low, and the correlation is strong for a long period of time, and the reflected signals of the narrowband signal can cancel each other after the inverse accumulation by the above method. In other embodiments, the baseband signal may also be a wideband signal, and the data in the wideband signal is uncorrelated. The reversed accumulation of the broadband signal by the above method does not cancel the reflected signal of the wideband signal, but the power increase range thereof Slower, less than the growth amplitude of the reflected signal of the standing wave detection signal. The above method can also make the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal faster than the preset threshold. .
S16：利用累加后的反射信号确定***驻波比。S16: Determine the system standing wave ratio by using the accumulated reflected signal.
其中，该***驻波比是天馈***的驻波比。由于该累加后的反射信号中驻波检测信号的反射信号与基带信号的反射信号的信噪比较快大于预设阈值，即该基带信号基本可以忽略不计，此时，可以利用该累加后的反射信号确定该***驻波比。Among them, the standing wave ratio of the system is the standing wave ratio of the antenna feeder system. Since the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the accumulated reflected signal is faster than a preset threshold, the baseband signal is substantially negligible. In this case, the accumulated The reflected signal determines the standing wave ratio of the system.
可选地，如图5所示，步骤S16包括：Optionally, as shown in FIG. 5, step S16 includes:
S161：利用累加后的反射信号计算***的通道响应；S161: calculating a channel response of the system by using the accumulated reflected signal;
其中，该***的通道响应可以是时域响应，也可以是频域响应，此处不做具体限定。该***的通道响应是从发送驻波检测信号到累加反射信号之间的通道的响应。The channel response of the system may be a time domain response or a frequency domain response, which is not specifically limited herein. The channel response of the system is the response from the channel between the transmission of the standing wave detection signal to the accumulation of the reflected signal.
S162：将通道响应与初始通道响应进行比较，确定***驻波比。S162: Comparing the channel response with the initial channel response to determine the system standing wave ratio.
其中，该初始通道响应是预先测试得到的***开路时的通道响应，即天馈***初始未连接天线时，预先测试得到的初始通道响应。该初始通道响应同样可以是时域响应，也可以是频域响应。The initial channel response is a channel response when the system is pre-tested, that is, the initial channel response obtained by the pre-test when the antenna feeder system is initially unconnected. The initial channel response can also be a time domain response or a frequency domain response.
具体地，在一个应用例中，可以利用该累加后的反射信号和初始生成的驻波检测信号计算该***的通道响应，例如时域响应，然后获取该***的时域响应的峰值和该初始通道时域响应的峰值，计算二者的峰值比，最后该峰值比即为该***驻波比。当然，在其他应用例中，也可以通过频域响应确定该***驻波比。Specifically, in an application example, the accumulated reflection signal and the initially generated standing wave detection signal may be used to calculate a channel response of the system, such as a time domain response, and then obtain a peak of the time domain response of the system and the initial The peak value of the channel time domain response is calculated as the peak ratio of the two, and finally the peak ratio is the standing wave ratio of the system. Of course, in other applications, the system standing wave ratio can also be determined by the frequency domain response.
下面可以采用本申请的驻波检测方法进行仿真。其中，输入基带信号为Tetra 5kbps IQ数据，在184.32Mbps上做512点累加仿真。The following can be simulated by the standing wave detection method of the present application. Where the input baseband signal is Tetra 5kbps IQ data, do 512 point accumulation simulation at 184.32Mbps.
仿真结果：如果以512分段，基带信号直接分段累加，累加192次后，总输出功率为源信号的245倍。如果先以512分段，基带信号分段反转累加，最后累加192次后，总输出功率为原信号的0.45倍。也就是说，直接分段累加和反转分段累加相比，基带功率可以降低245/0.45=544倍，在相同信噪比要求的情况下，累加时间可以减小544倍。Simulation result: If the 512 segment is used, the baseband signal is directly segmented and accumulated. After 192 times, the total output power is 245 times of the source signal. If the segmentation is first performed in 512, the baseband signal is inverted and accumulated, and finally, after 192 accumulations, the total output power is 0.45 times of the original signal. That is to say, the baseband power can be reduced by 245/0.45=544 times compared to the direct segmentation and the reverse segmentation, and the accumulation time can be reduced by 544 times in the case of the same signal-to-noise ratio requirement.
本实施例中，将反射信号周期性反转，使得反转后的反射信号中驻波检测信号叠加多次后，其功率增速大于基带信号的功率增速，从而可以使得信噪比提升较快，提高驻波检测的效率。In this embodiment, the reflected signal is periodically inverted, so that after the standing wave detection signal is superimposed a plurality of times in the inverted reflected signal, the power increase rate is greater than the power increase rate of the baseband signal, thereby improving the signal to noise ratio. Fast, improve the efficiency of standing wave detection.
如图6所示，本申请驻波检测方法第二实施例是在本申请驻波检测方法第一实施例的基础上，步骤S161和S162进一步包括：As shown in FIG. 6, the second embodiment of the standing wave detecting method of the present application is based on the first embodiment of the standing wave detecting method of the present application, and steps S161 and S162 further include:
S1611：将累加后的反射信号和驻波检测信号分别进行快速傅里叶变换，以分别得到累加后的反射信号的频域信号和驻波检测信号的频域信号；S1611: performing fast Fourier transform on the accumulated reflected signal and the standing wave detection signal, respectively, to obtain a frequency domain signal of the accumulated reflected signal and a frequency domain signal of the standing wave detection signal, respectively;
S1612：利用累加后的反射信号的频域信号和驻波检测信号的频域信号计算***的通道频率响应；S1612: calculating a channel frequency response of the system by using the frequency domain signal of the accumulated reflected signal and the frequency domain signal of the standing wave detection signal;
S1613：将该通道频率响应进行快速傅里叶反变换，以获得***的通道时域响应；S1613: performing fast Fourier transform on the channel frequency response to obtain a channel time domain response of the system;
S1621：将***的通道时域响应的峰值与初始通道时域响应的峰值进行比较，得到***驻波比。S1621: Comparing the peak value of the channel time domain response of the system with the peak value of the initial channel time domain response to obtain a system standing wave ratio.
具体地，由于该累加后的反射信号中，驻波检测信号的反射信号与基带信号的反射信号的信噪比较快大于预设阈值，即该基带信号基本可以忽略不计，此时，可以将该累加后的反射信号看作累加后的驻波检测信号的反射信号，记为y信号。其中，可以将初始发送的驻波检测信号记为x信号，将累加后的反射信号y和驻波检测信号x分别进行快速傅里叶变换，可以分别得到累加后的反射信号的频域信号FFT（y）和驻波检测信号的频域信号FFT（x），则计算该累加后的反射信号的频域信号FFT（y）和驻波检测信号的频域信号FFT（x）的比值FFT（y）/FFT（x），可以得到***的通道频率响应H，然后将该通道频域响应H进行快速傅里叶反变换IFFT（H），则可以获得***的通道时域响应F（t）=IFFT（H）。获取***的通道时域响应F（t）的峰值和初始通道时延响应的峰值后，将二者进行比较，则可以得到***的驻波比。Specifically, in the reflected signal, the signal-to-noise of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal is faster than a preset threshold, that is, the baseband signal is substantially negligible. The accumulated reflected signal is regarded as a reflected signal of the accumulated standing wave detection signal, and is recorded as a y signal. Wherein, the initially transmitted standing wave detection signal can be recorded as an x signal, and the accumulated reflected signal y and the standing wave detection signal x can be respectively subjected to fast Fourier transform, and the frequency domain signal FFT of the accumulated reflected signal can be respectively obtained. (y) and the frequency domain signal FFT(x) of the standing wave detection signal, the ratio FFT of the frequency domain signal FFT(y) of the accumulated reflected signal and the frequency domain signal FFT(x) of the standing wave detection signal is calculated ( y)/FFT(x), the channel frequency response H of the system can be obtained, and then the fast Fourier inverse transform IFFT(H) is performed on the channel frequency domain response H, then the channel time domain response F(t) of the system can be obtained. =IFFT(H). After obtaining the peak value of the channel time domain response F(t) of the system and the peak value of the initial channel delay response, the two are compared to obtain the standing wave ratio of the system.
在其他实施例中，还可以在将反射信号进行周期性反转之前，将该反射信号进行时延对齐，从而可以使得反转起始点接近反射信号中驻波检测信号的反射信号的正负幅值的转换点，进而可以减少通道时延对后续累加的影响。In other embodiments, the reflected signal may be time-delayed before the reflected signal is periodically inverted, so that the inversion starting point is close to the positive and negative amplitude of the reflected signal of the standing wave detecting signal in the reflected signal. The conversion point of the value, which in turn reduces the impact of channel delay on subsequent accumulation.
具体如图7所示，本申请驻波检测方法第三实施例是在本申请驻波检测方法第一实施例的基础上，步骤S14之前，进一步包括：Specifically, as shown in FIG. 7, the third embodiment of the standing wave detecting method of the present application is based on the first embodiment of the standing wave detecting method of the present application. Before step S14, the method further includes:
S21：计算该反射信号的时延；S21: calculating a delay of the reflected signal;
由于传输通道存在时延，该反射信号接收点接收到该反射信号时，可能接收到的可能不是发送的第一个数据的反射信号，例如图4（a）中驻波检测信号A1发送的第一个数据是a1，由于通道存在时延，接收到的反射信号中该驻波检测信号的反射信号A2的第一个数据不是a1，有可能是a5或a10等。此时，为了使得后续反射信号周期性反转时，该反转后使得驻波检测信号的反射信号A2的幅值大部分均为正幅值或均为负幅值，需要获取该反射信号的时延，以便进行时延对齐。Due to the delay of the transmission channel, when the reflected signal receiving point receives the reflected signal, the reflected signal that may be received may not be the first data transmitted, for example, the first transmitted by the standing wave detection signal A1 in FIG. 4(a) One data is a1. Due to the delay of the channel, the first data of the reflected signal A2 of the standing wave detection signal in the received reflected signal is not a1, and may be a5 or a10. At this time, in order to make the subsequent reflection signal periodically reverse, after the inversion, the amplitude of the reflected signal A2 of the standing wave detection signal is mostly positive amplitude or negative amplitude, and the reflection signal needs to be acquired. Delay for time delay alignment.
具体地，在一个应用例中，可以通过将接收到的反射信号进行周期性比较，获取接收到的第一个数据与下一周期中幅值相同的数据对应时间差距，将该时间差距减去反射信号的周期，即可以得到该反射信号的时延。此外，也可以预先采用一已知信号通过该传输通道后得到的信号，与该初始发送的已知信号进行比较，得到该传输通道的时延，作为该反射信号的时延。当然，还可以采用其他时延计算方法，例如采用公式计算等，此处不做具体限定。Specifically, in an application example, the time difference between the received first data and the data with the same amplitude in the next cycle may be obtained by periodically comparing the received reflected signals, and the time difference is subtracted. The period of the reflected signal, that is, the delay of the reflected signal can be obtained. In addition, a signal obtained by passing a known signal through the transmission channel may be pre-compared with the originally transmitted known signal to obtain a delay of the transmission channel as a delay of the reflected signal. Of course, other delay calculation methods may also be used, such as formula calculation, etc., which are not specifically limited herein.
S22：将该反射信号进行时延对齐，以使得时延对齐后的反射信号的每个周期性反转起点接近驻波检测信号的反射信号中负幅度的起始点。S22: align the reflected signal with time delay so that each periodic inversion starting point of the reflected signal after the time delay alignment is close to a starting point of a negative amplitude in the reflected signal of the standing wave detecting signal.
具体地，在一个应用例中，获取该反射信号的时延后，可以对该反射信号进行时延对齐，例如将该反射信号向后延迟获取的该时延，则时延对齐后，后续进行周期性反转时，每个周期的反转起始点可以与该驻波检测信号的反射信号中每个周期的负幅度的起始点重合。但该时延数据可能存在误差，该时延对齐后得到的该反射信号，在进行周期性反转时，每个周期的反转起始点接近该驻波检测信号的反射信号中每个周期的负幅度的起始点，即不重合，例如图4（e）中驻波检测信号的反射信号时延对齐后反转起始点是-a2，而不是-a1，此时，只要误差不超过容许范围（如1/5个周期）时，则周期性反转后的反射信号中，该驻波检测信号的反射信号周期性特性仍然存在，例如图4（f）中驻波检测信号的反射信号反转后，周期性仍然存在，只是周期变为T，后续累加仍然能够达到提升信噪比的目的。因此，采用较简单的时延对齐即可以达到提升信噪比的目的，同时不会过多增加***的计算复杂度。Specifically, in an application example, after the delay of the reflected signal is obtained, the reflected signal may be time-aligned, for example, the delay of the reflected signal is delayed, and then the delay is aligned, and then performed. When periodically inverting, the inversion starting point of each period may coincide with the starting point of the negative amplitude of each period in the reflected signal of the standing wave detecting signal. However, the delay data may have an error, and the reflected signal obtained after the time delay is aligned, when the periodic inversion is performed, the inversion starting point of each period is close to each period of the reflected signal of the standing wave detecting signal. The starting point of the negative amplitude, that is, does not coincide. For example, the reflected signal delay of the standing wave detection signal in Fig. 4(e) is aligned and the inversion starting point is -a2 instead of -a1. At this time, as long as the error does not exceed the allowable range (For example, 1/5 cycles), in the reflected signal after the periodic inversion, the periodic characteristic of the reflected signal of the standing wave detecting signal still exists, for example, the reflected signal of the standing wave detecting signal in FIG. 4(f) is reversed. After the transition, the periodicity still exists, but the period becomes T, and the subsequent accumulation can still achieve the purpose of improving the signal-to-noise ratio. Therefore, the use of simpler delay alignment can achieve the purpose of improving the signal-to-noise ratio without excessively increasing the computational complexity of the system.
如图8所示，本申请驻波检测装置第一实施例30包括：As shown in FIG. 8, the first embodiment 30 of the standing wave detecting apparatus of the present application includes:
信号生成器301，用于生成驻波检测信号，该驻波检测信号包括正负交替的周期信号；a signal generator 301, configured to generate a standing wave detection signal, where the standing wave detection signal includes a positive and negative alternating periodic signal;
发射电路302，连接信号生成器301，用于将发射信号通过发射通道进行发送，其中发射信号包括驻波检测信号和基带信号；The transmitting circuit 302 is connected to the signal generator 301 for transmitting the transmitting signal through the transmitting channel, wherein the transmitting signal comprises a standing wave detecting signal and a baseband signal;
反射接收电路303，连接发射电路302，用于接收发射信号在传输过程中产生的反射信号；The reflection receiving circuit 303 is connected to the transmitting circuit 302 for receiving the reflected signal generated by the transmitting signal during the transmission process;
信号处理电路304，连接反射接收电路303，用于将反射信号进行周期性反转，还用于将周期性反转后的反射信号累加预设次数，以使得累加后的反射信号中驻波检测信号的反射信号与基带信号的反射信号的信噪比大于预设阈值，并利用累加后的反射信号采用频域反射方法确定***驻波比。The signal processing circuit 304 is connected to the reflection receiving circuit 303 for periodically inverting the reflected signal, and is also used for accumulating the periodically inverted reflected signal by a preset number of times, so that the standing wave detection is performed in the accumulated reflected signal. The signal-to-noise ratio of the reflected signal of the signal and the reflected signal of the baseband signal is greater than a preset threshold, and the VSWR is determined by a frequency domain reflection method using the accumulated reflected signal.
可选地，该信号处理电路304进一步包括：Optionally, the signal processing circuit 304 further includes:
信号反转电路3041，用于将驻波检测信号的反射信号的至少部分负幅值反转为正幅值。The signal inversion circuit 3041 is configured to invert at least a portion of the negative amplitude of the reflected signal of the standing wave detection signal to a positive amplitude value.
该信号反转电路3041还用于将反射信号中基带信号的反射信号的至少部分正幅值反转为负幅值，以使得累加后反射信号中基带信号的反射信号至少部分相互抵消。The signal inversion circuit 3041 is further configured to invert at least a portion of the positive amplitude of the reflected signal of the baseband signal in the reflected signal to a negative amplitude such that the reflected signals of the baseband signal in the accumulated reflected signal at least partially cancel each other.
具体地，在一个应用例中，结合图9所示，该驻波检测装置30还可以包括发射通道和反馈通道，该发射通道包括但不限于数字预失真DPD、数模转换器DAC、发射器TX、双工器DUP、天线、负载，该反馈通道包括但不限于反射接收器Feedback RX、模数转换器ADC、累加器AAC、快速傅里叶变换电路FFT、驻波比计算电路等。其中，该信号生成器301也可以产生基带信号，该驻波检测信号也可以是直接保存在存储器（例如RAM（Random-Access Memory，随机存取存储器））中的数据，只需要将该数据利用加法器直接叠加到基带信号上进行发送。Specifically, in an application example, as shown in FIG. 9, the standing wave detecting device 30 may further include a transmitting channel and a feedback channel, including but not limited to a digital pre-distortion DPD, a digital-to-analog converter DAC, and a transmitter. TX, duplexer DUP, antenna, load, this feedback channel includes but is not limited to reflective receiver feedback RX, analog-to-digital converter ADC, accumulator AAC, fast Fourier transform circuit FFT, standing wave ratio calculation circuit, etc. The signal generator 301 can also generate a baseband signal, and the standing wave detection signal can also be directly stored in a memory (for example, RAM (Random-Access). The data in the memory (random access memory)) only needs to be superimposed on the baseband signal by the adder for transmission.
进一步参阅图9，在将驻波检测数据叠加到基带信号上时，还可以将该驻波检测信号进行增益/功率控制Gain Control，该信号处理电路304也可以直接是一个信号处理芯片，其也可以和信号反转电路3041、AAC、FFT电路、驻波比计算电路集成在一起。Referring further to FIG. 9, when the standing wave detection data is superimposed on the baseband signal, the standing wave detection signal can also be subjected to gain/power control Gain. Control, the signal processing circuit 304 can also be directly a signal processing chip, which can also be integrated with the signal inversion circuit 3041, AAC, FFT circuit, and standing wave ratio calculation circuit.
本实施例中，上述部件的具体功能实现过程可以参考本申请第一至第三任一实施例的内容，此处不再重复。In this embodiment, the specific function implementation process of the foregoing components may refer to the content of any one of the first to third embodiments of the present application, and is not repeated here.
如图10所示，本申请驻波检测装置第二实施例40与本申请驻波检测装置第一实施例的结构类似，不同之处在于，本实施例驻波检测装置40进一步包括：时延对齐电路305，耦接于反射接收电路303和信号处理电路304之间，用于计算反射信号的时延，将反射信号进行时延对齐，以使得时延对齐后的反射信号的每个周期性反转起点接近驻波检测信号的反射信号中负幅值的起始点。As shown in FIG. 10, the second embodiment 40 of the standing wave detecting device of the present application is similar to the first embodiment of the standing wave detecting device of the present application, except that the standing wave detecting device 40 of the present embodiment further includes: a delay The alignment circuit 305 is coupled between the reflection receiving circuit 303 and the signal processing circuit 304 for calculating the time delay of the reflected signal, and delaying the reflected signal to make each periodicity of the reflected signal after the time delay is aligned. The inversion starting point is close to the starting point of the negative amplitude in the reflected signal of the standing wave detection signal.
本实施例中，该时延对齐电路305计算反射信号时延和将反射信号进行时延对齐的具体过程可以参考本申请驻波检测方法第三实施例所提供的方法，此处不再重复。In this embodiment, the specific process of the delay alignment circuit 305 for calculating the reflected signal delay and the delay of the reflected signal may be referred to the method provided by the third embodiment of the standing wave detecting method of the present application, and is not repeated here.
如图11所示，本申请驻波检测装置第三实施例50与本申请驻波检测装置第一实施例的结构类似，不同之处在于，本实施例驻波检测装置50中，该信号处理电路304进一步包括：As shown in FIG. 11, the third embodiment 50 of the standing wave detecting device of the present application is similar to the first embodiment of the standing wave detecting device of the present application, except that the signal processing is performed in the standing wave detecting device 50 of the present embodiment. Circuitry 304 further includes:
通道响应计算电路3042，用于利用累加后的反射信号计算***的通道响应；a channel response calculation circuit 3042, configured to calculate a channel response of the system by using the accumulated reflected signal;
驻波比计算电路3043，连接该通道响应计算电路3042，用于将该***的通道响应与初始通道响应进行比较，确定***驻波比。The standing wave ratio calculation circuit 3043 is connected to the channel response calculation circuit 3042 for comparing the channel response of the system with the initial channel response to determine the system standing wave ratio.
可选地，该通道响应计算电路306进一步用于将累加后的反射信号和驻波检测信号分别进行快速傅里叶变换，利用得到的累加后的反射信号的频域信号和驻波检测信号的频域信号计算***的通道频率响应，并将该通道频率响应进行快速傅里叶反变换，以获得***的通道的时域响应；Optionally, the channel response calculation circuit 306 is further configured to perform fast Fourier transform on the accumulated reflected signal and the standing wave detection signal respectively, and utilizes the obtained frequency domain signal of the accumulated reflected signal and the standing wave detection signal. The frequency domain signal calculates a channel frequency response of the system, and performs fast Fourier transform on the channel frequency response to obtain a time domain response of the channel of the system;
该驻波比计算电路3043具体用于将***的通道时域响应的峰值与初始通道时域响应的峰值进行比较，得到***驻波比。The standing wave ratio calculation circuit 3043 is specifically configured to compare the peak value of the channel time domain response of the system with the peak value of the initial channel time domain response to obtain a system standing wave ratio.
本实施例中，该通道响应计算电路3042和驻波比计算电路3043计算***驻波比的具体过程可以参考本申请驻波检测方法第一和第二实施例所提供的方法，此处不再重复。In this embodiment, the specific process of calculating the VSWR of the channel response calculation circuit 3042 and the standing wave ratio calculation circuit 3043 can refer to the methods provided by the first and second embodiments of the standing wave detection method of the present application. repeat.
本实施例中，该驻波检测装置还可以包括时延对齐电路，该时延对齐电路连接该反射接收电路和该信号处理电路，其中，该时延对齐电路的具体工作过程可以参考本申请驻波检测方法第三实施例所提供的方法，此处不再重复。In this embodiment, the standing wave detecting device may further include a delay alignment circuit, and the delay alignment circuit is connected to the reflection receiving circuit and the signal processing circuit, wherein the specific working process of the delay alignment circuit may refer to the present application. Wave detection method The method provided by the third embodiment is not repeated here.
如图12所示，本申请具有存储功能的装置一实施例中，该具有存储功能的装置60存储有指令601，该指令被执行时实现如本申请驻波检测方法第一至第三任一实施例或者其不冲突的组合所提供的方法。As shown in FIG. 12, in an embodiment of the present application having a storage function, the device 60 having a storage function stores an instruction 601, and when the instruction is executed, the first to third embodiments of the standing wave detection method of the present application are implemented. A method provided by an embodiment or a combination thereof that does not conflict.
其中，具有存储功能的设备60可以是便携式存储介质如U盘、光盘，也可以是基站、服务器或可集成于基站中的独立部件，例如控制芯片等。The device 60 having a storage function may be a portable storage medium such as a USB flash drive or an optical disk, or may be a base station, a server, or a separate component that can be integrated into the base station, such as a control chip or the like.
以上所述仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。 The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims (13)

  1. 一种驻波检测方法，其特征在于，包括：A standing wave detecting method, comprising:
    生成驻波检测信号，所述驻波检测信号包括正负交替的周期信号；Generating a standing wave detection signal, the standing wave detection signal comprising a positive and negative alternating periodic signal;
    将发射信号通过发射通道进行发送，其中所述发射信号包括所述驻波检测信号和基带信号；Transmitting a transmit signal through a transmit channel, wherein the transmit signal includes the standing wave detection signal and a baseband signal;
    接收所述发射信号在传输过程中产生的反射信号；Receiving a reflected signal generated by the transmission signal during transmission;
    将所述反射信号进行周期性反转；Periodically inverting the reflected signal;
    将周期性反转后的所述反射信号累加预设次数，以使得累加后的所述反射信号中所述驻波检测信号的反射信号与所述基带信号的反射信号的信噪比大于预设阈值；Adding the reflected signal after the periodic inversion to a predetermined number of times, so that the signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the reflected signal is greater than a preset Threshold value
    利用累加后的所述反射信号确定***驻波比。The system standing wave ratio is determined using the accumulated reflected signals.
  2. 根据权利要求1所述的方法，其特征在于，所述将所述反射信号进行周期性反转包括：The method according to claim 1, wherein said periodically inverting said reflected signal comprises:
    将所述驻波检测信号的反射信号的至少部分负幅值周期性反转为正幅值。At least a portion of the negative amplitude of the reflected signal of the standing wave detection signal is periodically inverted to a positive amplitude.
  3. 根据权利要求2所述的方法，其特征在于，所述将所述反射信号进行周期性反转还包括：The method according to claim 2, wherein said periodically inverting said reflected signal further comprises:
    将所述反射信号中所述基带信号的反射信号的至少部分正幅值周期性反转为负幅值，以使得累加后所述反射信号中所述基带信号的反射信号至少部分相互抵消。At least a portion of the positive amplitude of the reflected signal of the baseband signal in the reflected signal is periodically inverted to a negative amplitude such that the reflected signals of the baseband signal in the reflected signal at least partially cancel each other after the accumulation.
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述将所述反射信号进行周期性反转之前，进一步包括：The method according to any one of claims 1 to 3, wherein before the periodically inverting the reflected signal, the method further comprises:
    计算所述反射信号的时延；Calculating a delay of the reflected signal;
    将所述反射信号进行时延对齐，以使得时延对齐后的所述反射信号的每个周期性反转起点接近所述驻波检测信号的反射信号中负幅值的起始点。The reflected signals are time-delay aligned such that each periodic inversion starting point of the reflected signal after the time-delay alignment is close to a starting point of a negative amplitude in the reflected signal of the standing wave detecting signal.
  5. 根据权利要求1至3任一项所述的方法，其特征在于，所述利用累加后的所述反射信号确定***驻波比包括：The method according to any one of claims 1 to 3, wherein the determining the system standing wave ratio by using the accumulated reflected signals comprises:
    利用累加后的所述反射信号计算***的通道响应；Calculating a channel response of the system by using the accumulated reflected signal;
    将所述通道响应与初始通道响应进行比较，确定所述***驻波比。The channel response is compared to an initial channel response to determine the system standing wave ratio.
  6. 根据权利要求5所述的方法，其特征在于，The method of claim 5 wherein:
    所述利用累加后的所述反射信号计算***的通道响应包括：The channel response of the computing system using the accumulated reflected signals includes:
    将累加后的所述反射信号和所述驻波检测信号分别进行快速傅里叶变换，以分别得到累加后的所述反射信号的频域信号和所述驻波检测信号的频域信号；And performing the fast Fourier transform on the accumulated reflected signal and the standing wave detection signal respectively to obtain the frequency domain signal of the accumulated reflected signal and the frequency domain signal of the standing wave detection signal respectively;
    利用累加后的所述反射信号的频域信号和所述驻波检测信号的频域信号计算所述***的通道频率响应；Calculating a channel frequency response of the system by using the frequency domain signal of the reflected signal and the frequency domain signal of the standing wave detection signal;
    将所述通道频率响应进行快速傅里叶反变换，以获得所述***的通道时域响应；Performing a fast Fourier transform on the channel frequency response to obtain a channel time domain response of the system;
    所述将所述通道响应与初始通道响应进行比较，确定所述***驻波比包括：The comparing the channel response with an initial channel response, determining that the system standing wave ratio comprises:
    将所述***的通道时域响应的峰值与初始通道时域响应的峰值进行比较，得到所述***驻波比。Comparing the peak value of the channel time domain response of the system with the peak value of the initial channel time domain response to obtain the system standing wave ratio.
  7. 一种驻波检测装置，其特征在于，包括：A standing wave detecting device, comprising:
    信号生成器，用于生成驻波检测信号，所述驻波检测信号包括正负交替的周期信号；a signal generator, configured to generate a standing wave detection signal, where the standing wave detection signal includes a positive and negative alternating periodic signal;
    发射电路，连接所述信号生成器，用于将发射信号通过发射通道进行发送，其中所述发射信号包括所述驻波检测信号和基带信号；a transmitting circuit, coupled to the signal generator, for transmitting the transmitting signal through the transmitting channel, wherein the transmitting signal includes the standing wave detecting signal and a baseband signal;
    反射接收电路，连接所述发射电路，用于接收所述发射信号在传输过程中产生的反射信号；a reflection receiving circuit, connected to the transmitting circuit, for receiving a reflected signal generated by the transmitting signal during transmission;
    信号处理电路，连接所述反射接收电路，用于将所述反射信号进行周期性反转，还用于将周期性反转后的所述反射信号累加预设次数，以使得累加后的所述反射信号中所述驻波检测信号的反射信号与所述基带信号的反射信号的信噪比大于预设阈值，并利用累加后的所述反射信号确定***驻波比。a signal processing circuit is connected to the reflection receiving circuit for periodically inverting the reflected signal, and is further configured to accumulate the reflected signal after the periodic inversion by a preset number of times, so that the accumulated And a signal-to-noise ratio of the reflected signal of the standing wave detection signal and the reflected signal of the baseband signal in the reflected signal is greater than a preset threshold, and the accumulated standing signal is used to determine a system standing wave ratio.
  8. 根据权利要求7所述的装置，其特征在于，所述信号处理电路进一步包括：The apparatus of claim 7 wherein said signal processing circuit further comprises:
    信号反转电路，用于将所述驻波检测信号的反射信号的至少部分负幅值周期性反转为正幅值。And a signal inversion circuit configured to periodically invert at least a portion of the negative amplitude of the reflected signal of the standing wave detection signal to a positive amplitude.
  9. 根据权利要求8所述的装置，其特征在于，所述信号反转电路进一步用于将所述反射信号中所述基带信号的反射信号的至少部分正幅值周期性反转为负幅值，以使得累加后所述反射信号中所述基带信号的反射信号至少部分相互抵消。The apparatus according to claim 8, wherein said signal inversion circuit is further configured to periodically invert at least a portion of a positive amplitude of said reflected signal of said baseband signal to a negative amplitude. So that the reflected signals of the baseband signals in the reflected signals after the accumulation are at least partially canceled each other.
  10. 根据权利要求7至9任一项所述的装置，其特征在于，所述装置进一步包括：时延对齐电路，耦接于所述反射接收电路和所述信号处理电路之间，用于计算所述反射信号的时延，将所述反射信号进行时延对齐，以使得时延对齐后的所述反射信号的每个周期性反转起点接近所述驻波检测信号的反射信号中负幅值的起始点。The device according to any one of claims 7 to 9, wherein the device further comprises: a delay alignment circuit coupled between the reflection receiving circuit and the signal processing circuit for calculating The time delay of the reflected signal is time-aligned, so that each periodic inversion starting point of the reflected signal after the time-delay alignment is close to the negative amplitude of the reflected signal of the standing wave detecting signal The starting point.
  11. 根据权利要求7至9任一项所述的装置，其特征在于，所述信号处理电路进一步包括：The apparatus according to any one of claims 7 to 9, wherein the signal processing circuit further comprises:
    通道响应计算电路，用于利用累加后的所述反射信号计算***的通道响应；a channel response calculation circuit for calculating a channel response of the system by using the accumulated reflected signal;
    驻波比计算电路，连接所述通道响应计算电路，用于将所述通道响应与初始通道响应进行比较，确定所述***驻波比。A standing wave ratio calculation circuit is coupled to the channel response calculation circuit for comparing the channel response with an initial channel response to determine the system standing wave ratio.
  12. 根据权利要求11所述的装置，其特征在于，The device of claim 11 wherein:
    所述通道响应计算电路进一步用于将累加后的所述反射信号和所述驻波检测信号分别进行快速傅里叶变换，利用得到的累加后的所述反射信号的频域信号和所述驻波检测信号的频域信号计算所述***的通道频率响应，并将所述通道频率响应进行快速傅里叶反变换，以获得所述***的通道时域响应；The channel response calculation circuit is further configured to perform a fast Fourier transform on the accumulated reflected signal and the standing wave detection signal respectively, and use the obtained frequency domain signal of the reflected signal and the resident Calculating a channel frequency response of the system by using a frequency domain signal of the wave detection signal, and performing inverse fast Fourier transform on the channel frequency response to obtain a channel time domain response of the system;
    所述驻波比计算电路进一步用于将所述***的通道时域响应的峰值与初始通道时域响应的峰值进行比较，得到所述***驻波比。The standing wave ratio calculation circuit is further configured to compare a peak value of a channel time domain response of the system with a peak value of an initial channel time domain response to obtain the system standing wave ratio.
  13. 一种具有存储功能的装置，存储有指令，其特征在于，所述指令被执行时实现如权利要求1-6任一项所述的方法。A device having a storage function, storing instructions, wherein the instructions are executed to implement the method of any of claims 1-6.
PCT/CN2018/077572 2018-02-28 2018-02-28 Method and device for detecting standing wave, and device having storage function WO2019165601A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/077572 WO2019165601A1 (en) 2018-02-28 2018-02-28 Method and device for detecting standing wave, and device having storage function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/077572 WO2019165601A1 (en) 2018-02-28 2018-02-28 Method and device for detecting standing wave, and device having storage function

Publications (1)

Publication Number Publication Date
WO2019165601A1 true WO2019165601A1 (en) 2019-09-06

Family

ID=67804753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/077572 WO2019165601A1 (en) 2018-02-28 2018-02-28 Method and device for detecting standing wave, and device having storage function

Country Status (1)

Country Link
WO (1) WO2019165601A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210321497A1 (en) * 2020-04-08 2021-10-14 Lg Electronics Inc. Oven including plural antennas and method for controlling the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101958756A (en) * 2010-02-11 2011-01-26 华为技术有限公司 Standing wave detection method, standing wave detection device and base station
WO2011098021A1 (en) * 2010-02-11 2011-08-18 华为技术有限公司 Standing wave detection method, standing wave detection device and base station thereof
CN104898027A (en) * 2015-06-17 2015-09-09 成都前锋电子仪器有限责任公司 Multifunctional communication signal measurement radio frequency front-end circuit
CN104918275A (en) * 2015-06-26 2015-09-16 大唐移动通信设备有限公司 RRU adaptive power adjustment method and device thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101958756A (en) * 2010-02-11 2011-01-26 华为技术有限公司 Standing wave detection method, standing wave detection device and base station
WO2011098021A1 (en) * 2010-02-11 2011-08-18 华为技术有限公司 Standing wave detection method, standing wave detection device and base station thereof
CN104898027A (en) * 2015-06-17 2015-09-09 成都前锋电子仪器有限责任公司 Multifunctional communication signal measurement radio frequency front-end circuit
CN104918275A (en) * 2015-06-26 2015-09-16 大唐移动通信设备有限公司 RRU adaptive power adjustment method and device thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210321497A1 (en) * 2020-04-08 2021-10-14 Lg Electronics Inc. Oven including plural antennas and method for controlling the same

Similar Documents

Publication Publication Date Title
WO2019165601A1 (en) Method and device for detecting standing wave, and device having storage function
WO2011091754A1 (en) Sound source locating method and apparatus thereof
CN108880721A (en) Second too networked physics layer circuit and its clock recovery method
CN105306403A (en) Method and system for reducing peak-to-average ratio of transmitting signal of OFDM system
CN104104411A (en) Power line communication device and power control method thereof
CN109660281B (en) Method and device for measuring distance between communication nodes based on wired transmission medium
WO2021042724A1 (en) Anti-interference method and apparatus for ofdm system, electronic device, and storage medium
WO2012139489A1 (en) Long-distance high-speed broadband power line communication device
WO2013078656A1 (en) Method and device for frame synchronization in optical fiber system
Yang et al. Design of sensor nodes in underwater sensor networks
WO2013027898A1 (en) Low-power, high-speed transceiver
ATE415665T1 (en) TRANSMITTING DATA BETWEEN DIFFERENTLY CLOCKED BUSES
CN108601045B (en) Standing wave detection method and device with storage function
CN114201991A (en) Partial discharge signal detection method and system based on ultrasonic sensor array
JPS6252349A (en) Active sound deadening device
CN112910502A (en) Method for detecting large and small signals suitable for medium-voltage power line carrier communication
TW202133570A (en) Operation method and receiver device
CN200956595Y (en) Interface converting device
WO2021085791A1 (en) Feedback-based on-die termination circuit
TWI819778B (en) Communication system, electronic device, and echo noise cancelling ability determination method
CN205105090U (en) Drive circuit among direct current transmission series parallel transition utensils control system
Tang et al. An Adaptive Time Delay Estimation Method for Broadcast Audio Based on Power Cepstrum
US11644489B2 (en) Current recording method, current recording device and current recording system
JP3593691B2 (en) ΣΔ AD converter
JPS58196466A (en) Measurement of characteristics for cable or the like

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18908233

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 25.01.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18908233

Country of ref document: EP

Kind code of ref document: A1