WO2016062033A1 - Frequency compensation processing method and device - Google Patents

Frequency compensation processing method and device Download PDF

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Publication number
WO2016062033A1
WO2016062033A1 PCT/CN2015/076487 CN2015076487W WO2016062033A1 WO 2016062033 A1 WO2016062033 A1 WO 2016062033A1 CN 2015076487 W CN2015076487 W CN 2015076487W WO 2016062033 A1 WO2016062033 A1 WO 2016062033A1
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frequency
calculation result
frequency offset
value
receiver
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PCT/CN2015/076487
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French (fr)
Chinese (zh)
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钟长龙
安靖
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中兴通讯股份有限公司
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Publication of WO2016062033A1 publication Critical patent/WO2016062033A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/027—Speed or phase control by the received code signals, the signals containing no special synchronisation information extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
    • 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

Definitions

  • the present invention relates to the field of communications, and in particular to a frequency compensation processing method and apparatus.
  • the frequency of the local oscillator of the digital coherent receiver must be consistent with the frequency of the transmitter.
  • Common methods include directly processing the received signal (time domain method), or using the frequency domain information of the received signal for frequency offset estimation (frequency domain method).
  • the frequency domain method requires FFT operations and is highly complex.
  • the time domain method estimates the phase difference between adjacent signals. Due to the existence of the frequency offset, the phase between the adjacent sample values in addition to the modulation phase also includes the phase caused by the frequency difference, and the phase caused by the frequency difference is a constant value.
  • the complex multiplication and conjugate operations are performed on the received signal, and finally the effect of Gaussian noise is eliminated by the averaging method.
  • the calculation accuracy of this method cannot be improved due to noise due to a certain range.
  • it is susceptible to sudden interference noise, resulting in errors in the frequency offset calculation results.
  • the embodiment of the invention provides a frequency compensation processing method and device, so as to solve at least the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed.
  • a frequency compensation processing method comprising: obtaining a frequency offset estimation value between a signal receiving frequency of a receiver and a signal transmitting frequency of a transmitter; and using a second-order loop filter The frequency offset estimation value is processed to obtain a frequency offset compensation value, and the signal reception frequency of the receiver is compensated by using the frequency offset compensation value.
  • compensating the signal receiving frequency of the receiver by using the frequency offset compensation value comprises: using the frequency offset compensation value to compensate the signal receiving frequency, to obtain a compensated signal receiving frequency. And processing the compensated signal receiving frequency by the second-order loop filter to obtain a first frequency offset compensation value; acquiring a difference between the first frequency offset compensation value and the theoretical frequency offset value; The difference value is processed through a plurality of or one of the second-order loop filters in sequence to obtain a final frequency offset compensation value, and the compensated signal receiving frequency is compensated using the final frequency offset compensation value.
  • obtaining a frequency offset estimation value between a frequency of a signal received by the receiver and a frequency of a corresponding signal sent by the transmitter includes: multiplying a plurality of sets of adjacent signals received by the receiver by a conjugate The first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein each set of adjacent signals includes two mutually adjacent signals; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result And obtaining an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by 4
  • the frequency offset estimate is described.
  • acquiring the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter includes: multiplying two signals received by the receiver with an interval of N samples by conjugate The obtained first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein the N is a natural number greater than 1; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result; Calculating the angle value, obtaining a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by (4*N) to obtain the Frequency offset estimate.
  • a frequency compensation processing apparatus comprising: an acquisition module configured to acquire a frequency offset estimation value between a signal receiving frequency of a receiver and a signal transmission frequency of a transmitter; and a processing module And determining to process the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value; and the compensation module is configured to compensate the signal receiving frequency of the receiver by using the frequency offset compensation value.
  • the compensation module includes: a first compensation unit configured to compensate the signal receiving frequency by using the frequency offset compensation value to obtain a compensated signal receiving frequency;
  • the signal receiving frequency is processed by the second-order loop filter to obtain a first frequency offset compensation value; and the acquiring unit is configured to obtain a difference between the first frequency offset compensation value and the theoretical frequency offset value; and the second compensation unit And configured to process the difference sequentially through multiple or one of the second-order loop filters to obtain a final frequency offset compensation value, and use the final frequency offset compensation value to receive the compensated signal
  • the frequency is compensated.
  • the acquiring module is further configured to perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying the conjugates of the plurality of sets of adjacent signals received by the receiver, where Each set of adjacent signals includes two mutually adjacent signals; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result Obtaining an angle value for the third calculation result to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by 4 to obtain The frequency offset estimate.
  • the acquiring module is further configured to: perform a fourth power calculation to obtain a second calculation by multiplying a first calculation result obtained by multiplying two signals received by the receiver with an interval of N samples a result, wherein the N is a natural number greater than 1; the obtained plurality of the second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; The angle value is obtained by multiplying the third calculation result by a factor of 2; the fourth calculation result is divided by (4*N) to obtain the frequency offset estimation value.
  • the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter is obtained; the frequency offset estimation value is processed by the second-order loop filter to obtain the frequency offset compensation value;
  • the frequency offset compensation value is used to compensate the receiver signal receiving frequency, which solves the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed, and the frequency compensation accuracy and frequency are improved.
  • the anti-interference ability of the compensation improves the stability of the system.
  • FIG. 1 is a flow chart of a frequency compensation processing method according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the structure of a frequency compensation processing apparatus according to an embodiment of the present invention
  • FIG. 3 is a block diagram 1 of a structure of a frequency compensation processing apparatus according to an embodiment of the present invention.
  • FIG. 4 is a structural diagram of a frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention
  • FIG. 5 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop in the prior art
  • FIG. 6 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a frequency compensation processing method according to an embodiment of the present invention. As shown in FIG. 1, the flow includes the following steps:
  • Step S102 acquiring a frequency offset estimation value between a signal receiving frequency of the receiver and a signal transmitting frequency of the transmitter;
  • Step S104 processing the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value
  • Step S106 using the frequency offset compensation value to compensate the signal receiving frequency of the receiver.
  • the second-order loop filter is used to process the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter, thereby obtaining a more accurate frequency offset compensation value, so as to facilitate the receiver.
  • the signal receiving frequency is compensated.
  • the calculation accuracy of the frequency offset estimation using the time domain method reaches a certain range, and cannot be improved due to noise, and is susceptible to sudden interference noise, resulting in The frequency offset calculation result is wrong.
  • the accuracy of frequency compensation and the anti-interference ability of frequency compensation are improved, and the stability of the system is improved.
  • the signal receiving frequency of the receiver is compensated by using the frequency offset compensation value.
  • the step specifically includes: using the frequency offset compensation value to compensate the signal receiving frequency, and obtaining the compensated
  • the compensated signal receiving frequency is processed by a second-order loop filter to obtain a first frequency offset compensation value, and the first frequency offset is obtained.
  • the difference between the compensation value and the theoretical frequency offset value; the difference is sequentially processed by a plurality of or one of the second-order loop filters to obtain a final frequency offset compensation value, and the final frequency offset compensation value is used to compensate the signal.
  • the receiving frequency is compensated.
  • the frequency of the compensated received signal is processed a plurality of times by the second-order loop filter to improve the accuracy of the final frequency offset compensation value.
  • obtaining a frequency offset estimate between the frequency of the signal received by the receiver and the frequency of the corresponding signal transmitted by the transmitter comprises: multiplying the plurality of sets of adjacent signals received by the receiver by conjugate The first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein each set of adjacent signals includes two mutually adjacent signals, and the obtained plurality of second calculation results are accumulated to obtain a third calculation result, The third calculation result obtains an angle value to obtain a fourth calculation result; dividing the fourth calculation result by 4 to obtain a frequency offset estimation value.
  • obtaining the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter comprises: multiplying the two signals received by the receiver with the interval of N samples by conjugate The obtained first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein the N is a natural number greater than 1; and the obtained plurality of second calculation results are accumulated Obtaining a third calculation result; obtaining an angle value for the third calculation result, obtaining a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by (4*N ) Get the frequency offset estimate.
  • a frequency compensation processing device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • the apparatus includes: an acquisition module 22 configured to acquire a signal receiving frequency of a receiver and a signal transmission frequency of a transmitter. a frequency offset estimation value; the processing module 24 is connected to the obtaining module 22, configured to process the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value; and the compensation module 26 is connected to the processing module 24, and is set to The receiver's signal reception frequency is compensated using the frequency offset compensation value.
  • the compensation module 26 includes: a first compensation unit 32 configured to compensate a signal receiving frequency by using a frequency offset compensation value, The compensated signal receiving frequency is obtained; the compensated signal receiving frequency is processed by the second-order loop filter to obtain a first frequency offset compensation value; and the obtaining unit 34 is connected to the first compensation unit 32 and configured to acquire the first The difference between the frequency offset compensation value and the theoretical frequency offset value; the second compensation unit 36 is connected to the obtaining unit 34, and is configured to process the difference sequentially through multiple or one second-order loop filter to obtain a final frequency.
  • the offset compensation value is used to compensate the compensated signal reception frequency using the final offset compensation value.
  • the obtaining module 22 is further configured to: perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying the plurality of sets of adjacent signals conjugates received by the receiver, wherein each group The adjacent signal includes two mutually adjacent signals; the obtained plurality of second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; wherein, the angle value is obtained
  • the third calculation result is multiplied by 2 times the circumference ratio; the fourth calculation result is divided by 4 to obtain the frequency offset estimation value.
  • the obtaining module 22 is further configured to perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying two signals conjugates received by the receiver with the interval of N samples to obtain a second calculation result, wherein The N is a natural number greater than 1; the obtained plurality of second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; wherein the angle value is the third calculation result The result is multiplied by a factor of 2; the fourth calculation result is divided by (4*N) to obtain a frequency offset estimate.
  • the preferred embodiment uses a second-order negative feedback loop method to perform time-domain frequency offset compensation calculation.
  • a method of gradually increasing the separation distance between two signals for calculating the phase difference value is employed.
  • the accuracy of the frequency offset estimation is improved.
  • the stability of the frequency offset estimation is enhanced.
  • Fig. 4 The structure diagram of the frequency offset estimation method using the second-order negative feedback loop is shown in Fig. 4.
  • a second-order negative feedback structure is employed.
  • the result of each frequency offset estimation passes through a second-order loop filter, and the output result is used as a frequency offset compensation value. Compensation is applied to the input frequency offset compensation data.
  • the input to-be-bias compensation data is compensated by the frequency offset of the loop output, and then output to the calculation module of the next stage.
  • the calculation module may be the compensation module 26 in FIG.
  • input to the frequency offset estimation module using the second-order negative feedback loop If there is a difference between the frequency offset compensation value and the true frequency offset value of the loop output, the data after the frequency offset compensation has the residual frequency offset.
  • the residual frequency offset is calculated by the frequency offset estimation module, and the calculation result is filtered by the loop, and the output value is the next frequency offset compensation value. In this way, by continuously calculating and compensating the residual frequency offset, the residual frequency offset value input to the frequency offset estimation module is gradually reduced, and the accuracy of the frequency offset compensation is improved.
  • the second-order loop filter eliminates the influence of the inaccuracy of a certain frequency offset estimation result caused by accidental factors such as burst noise.
  • the anti-interference ability of the frequency offset compensation is improved, and the stability is improved.
  • the time domain calculation method of frequency offset estimation usually uses the method of 4th power calculation.
  • FIG. 5 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop in the prior art, as shown in FIG. 5:
  • the adjacent two signals V k and V k-1 are multiplied by conjugate, and then the fourth power is used to eliminate the difference of the information phase.
  • the calculation results of a plurality of consecutive signals are accumulated to eliminate the noise phase difference value.
  • the angle value is obtained from the calculation result, and after dividing by 4, the frequency offset estimation value ⁇ T i is obtained .
  • FIG. 6 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention.
  • the improved fourth-order square frequency offset estimation method is shown in FIG. 6.
  • the calculation results of a plurality of consecutive signals are accumulated to eliminate the noise phase difference value.
  • the angle value is obtained from the calculation result, and after dividing (4*n), the frequency offset estimation value ⁇ T i is obtained .
  • the improved quadratic square frequency offset estimation method increases the phase difference by increasing the interval between two samples of the phase difference value, thereby making it easier to extract from the noise.
  • the calculation accuracy of the frequency offset estimation is improved.
  • the separation distance n is based on the accuracy requirement of the frequency offset estimation, and the specific value of the residual frequency offset can be adjusted in real time.
  • the second-order negative feedback loop is used to increase the sample interval for calculating the phase difference value, and the two methods are used together to improve the calculation accuracy of the frequency offset estimation and enhance the frequency offset estimation. stability.
  • the algorithm is easy to implement and requires less hardware resources to implement.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter is obtained; and the frequency offset estimation value is processed by the second-order loop filter to obtain
  • the frequency offset compensation value is used to compensate the receiver signal receiving frequency by using the frequency offset compensation value, which solves the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed, and the frequency is improved.
  • the accuracy of the compensation and the anti-interference ability of the frequency compensation improve the stability of the system.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Disclosed are a frequency compensation processing method and device. The method comprises: acquiring a frequency offset estimated value between a signal receiving frequency of a receiver and a signal sending frequency of a transmitter; processing the frequency offset estimated value by using a second-order loop filter to obtain a frequency offset compensation value; and compensating the signal receiving frequency of the receiver by using the frequency offset compensation value. The present invention solves the problem in the prior art that frequency compensation cannot be carried out effectively because the frequency offset value cannot be calculated more accurately, so that the precision of frequency compensation and the anti-interference capability of frequency compensation are improved, and the system stability is enhanced.

Description

频率补偿处理方法及装置Frequency compensation processing method and device 技术领域Technical field
本发明涉及通信领域，具体而言，涉及一种频率补偿处理方法及装置。The present invention relates to the field of communications, and in particular to a frequency compensation processing method and apparatus.
背景技术Background technique
为了保证符号判决的正确性，数字相干接收机的本振光的频率必须与发射机的频率保持一致。一般情况下，本振光频率fLO与发射机频率fT不完全相同，使得接收到的信号在星座图上相对于原始调制信号发生旋转，旋转的角度与频率差值△f＝fLO-fT有关。如果不对该旋转的信号进行频率偏移补偿，直接进行符号判决，将不能够得到正确的符号。In order to ensure the correctness of the symbol decision, the frequency of the local oscillator of the digital coherent receiver must be consistent with the frequency of the transmitter. In general, the local oscillator frequency f LO is not exactly the same as the transmitter frequency f T , so that the received signal is rotated on the constellation relative to the original modulated signal, and the angle of rotation and the frequency difference Δf=f LO − f T related. If the frequency offset compensation is not performed on the rotated signal, the symbol decision is directly performed, and the correct symbol will not be obtained.
所以需要计算频率偏移值△f，并对其进行补偿。常用的方法有直接对接收信号进行处理(时域方法)，或利用接收信号的频域信息进行频率偏移的估计(频域方法)。频域方法需要用到FFT运算，复杂度高。时域方法利用相邻的信号之间相位差进行估计。由于频率偏移的存在，相邻采样值之间除了调制相位还包含有由频差引起的相位，且该频差引起的相位为恒定值。对接收到的信号进行复数的乘法和共轭运算，最后通过平均的方法消除高斯噪声的影响。但这种方法的计算精度达到一定范围后由于噪声的原因无法提高。而且易受突发的干扰噪声影响，导致频偏计算结果出错。Therefore, it is necessary to calculate the frequency offset value Δf and compensate it. Common methods include directly processing the received signal (time domain method), or using the frequency domain information of the received signal for frequency offset estimation (frequency domain method). The frequency domain method requires FFT operations and is highly complex. The time domain method estimates the phase difference between adjacent signals. Due to the existence of the frequency offset, the phase between the adjacent sample values in addition to the modulation phase also includes the phase caused by the frequency difference, and the phase caused by the frequency difference is a constant value. The complex multiplication and conjugate operations are performed on the received signal, and finally the effect of Gaussian noise is eliminated by the averaging method. However, the calculation accuracy of this method cannot be improved due to noise due to a certain range. Moreover, it is susceptible to sudden interference noise, resulting in errors in the frequency offset calculation results.
针对相关技术中，无法更加准确的计算频率偏移值，进而无法进行有效的频率补偿的问题，还未提出有效的解决方案。In the related art, the frequency offset value cannot be calculated more accurately, and thus the problem of effective frequency compensation cannot be performed, and an effective solution has not been proposed.
发明内容Summary of the invention
本发明实施例提供了一种频率补偿处理方法及装置，以至少解决现有技术中无法更加准确的计算频率偏移值，进而无法进行有效的频率补偿的问题。The embodiment of the invention provides a frequency compensation processing method and device, so as to solve at least the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed.
根据本发明的一个实施例，提供了一种频率补偿处理方法，包括：获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；通过二阶环路滤波器对所述频偏估计值进行处理，得到频偏补偿值；使用所述频偏补偿值对所述接收机的信号接收频率进行补偿。 According to an embodiment of the present invention, there is provided a frequency compensation processing method comprising: obtaining a frequency offset estimation value between a signal receiving frequency of a receiver and a signal transmitting frequency of a transmitter; and using a second-order loop filter The frequency offset estimation value is processed to obtain a frequency offset compensation value, and the signal reception frequency of the receiver is compensated by using the frequency offset compensation value.
在本实施例中，使用所述频偏补偿值对所述接收机的信号接收频率进行补偿包括：将使用所述频偏补偿值对所述信号接收频率进行补偿，得到补偿后的信号接收频率；将所述补偿后的信号接收频率通过所述二阶环路滤波器进行处理，得到第一频偏补偿值；获取所述第一频偏补偿值与理论频偏值的差值；将所述差值依次经过多个或一个所述二阶环路滤波器进行处理，得到最终的频偏补偿值，使用所述最终的频偏补偿值对所述补偿后的信号接收频率进行补偿。In this embodiment, compensating the signal receiving frequency of the receiver by using the frequency offset compensation value comprises: using the frequency offset compensation value to compensate the signal receiving frequency, to obtain a compensated signal receiving frequency. And processing the compensated signal receiving frequency by the second-order loop filter to obtain a first frequency offset compensation value; acquiring a difference between the first frequency offset compensation value and the theoretical frequency offset value; The difference value is processed through a plurality of or one of the second-order loop filters in sequence to obtain a final frequency offset compensation value, and the compensated signal receiving frequency is compensated using the final frequency offset compensation value.
在本实施例中，获取接收机接收的信号的频率与发射机发送的相应信号的频率之间的频偏估计值包括：将所述接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号；将得到的多个所述第二计算结果进行累加得到第三计算结果；对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；将所述第四计算结果除以4得到所述频偏估计值。In this embodiment, obtaining a frequency offset estimation value between a frequency of a signal received by the receiver and a frequency of a corresponding signal sent by the transmitter includes: multiplying a plurality of sets of adjacent signals received by the receiver by a conjugate The first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein each set of adjacent signals includes two mutually adjacent signals; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result And obtaining an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by 4 The frequency offset estimate is described.
在本实施例中，获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值包括：将间隔为N样点的所述接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中所述N为大于1的自然数；将得到的多个所述第二计算结果进行累加得到第三计算结果；对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；将所述第四计算结果除以(4*N)得到所述频偏估计值。In this embodiment, acquiring the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter includes: multiplying two signals received by the receiver with an interval of N samples by conjugate The obtained first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein the N is a natural number greater than 1; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result; Calculating the angle value, obtaining a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by (4*N) to obtain the Frequency offset estimate.
根据本发明的另一个实施例，还提供了一种频率补偿处理装置，包括：获取模块，设置为获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；处理模块，设置为通过二阶环路滤波器对所述频偏估计值进行处理，得到频偏补偿值；补偿模块，设置为使用所述频偏补偿值对所述接收机的信号接收频率进行补偿。According to another embodiment of the present invention, there is further provided a frequency compensation processing apparatus, comprising: an acquisition module configured to acquire a frequency offset estimation value between a signal receiving frequency of a receiver and a signal transmission frequency of a transmitter; and a processing module And determining to process the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value; and the compensation module is configured to compensate the signal receiving frequency of the receiver by using the frequency offset compensation value.
在本实施例中，所述补偿模块包括：第一补偿单元，设置为将使用所述频偏补偿值对所述信号接收频率进行补偿，得到补偿后的信号接收频率；将所述补偿后的信号接收频率通过所述二阶环路滤波器进行处理，得到第一频偏补偿值；获取单元，设置为获取所述第一频偏补偿值与理论频偏值的差值；第二补偿单元，设置为将所述差值依次经过多个或一个所述二阶环路滤波器进行处理，得到最终的频偏补偿值，使用所述最终的频偏补偿值对所述补偿后的信号接收频率进行补偿。In this embodiment, the compensation module includes: a first compensation unit configured to compensate the signal receiving frequency by using the frequency offset compensation value to obtain a compensated signal receiving frequency; The signal receiving frequency is processed by the second-order loop filter to obtain a first frequency offset compensation value; and the acquiring unit is configured to obtain a difference between the first frequency offset compensation value and the theoretical frequency offset value; and the second compensation unit And configured to process the difference sequentially through multiple or one of the second-order loop filters to obtain a final frequency offset compensation value, and use the final frequency offset compensation value to receive the compensated signal The frequency is compensated.
在本实施例中，所述获取模块还设置为：将所述接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号；将得到的多个所述第二计算结果进行累加得到第三计算结 果；对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；将所述第四计算结果除以4得到所述频偏估计值。In this embodiment, the acquiring module is further configured to perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying the conjugates of the plurality of sets of adjacent signals received by the receiver, where Each set of adjacent signals includes two mutually adjacent signals; and the obtained plurality of the second calculation results are accumulated to obtain a third calculation result Obtaining an angle value for the third calculation result to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by 4 to obtain The frequency offset estimate.
在本实施例中，所述获取模块还设置为：将间隔为N样点的所述接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中所述N为大于1的自然数；将得到的多个所述第二计算结果进行累加得到第三计算结果；对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；将所述第四计算结果除以(4*N)得到所述频偏估计值。In this embodiment, the acquiring module is further configured to: perform a fourth power calculation to obtain a second calculation by multiplying a first calculation result obtained by multiplying two signals received by the receiver with an interval of N samples a result, wherein the N is a natural number greater than 1; the obtained plurality of the second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; The angle value is obtained by multiplying the third calculation result by a factor of 2; the fourth calculation result is divided by (4*N) to obtain the frequency offset estimation value.
通过本发明实施例，采用获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；通过二阶环路滤波器对频偏估计值进行处理，得到频偏补偿值；使用该频偏补偿值对接收机的信号接收频率进行补偿，解决了现有技术中无法更加准确的计算频率偏移值，进而无法进行有效的频率补偿的问题，提高了频率补偿的精度和频率补偿的抗干扰能力，提升了***的稳定性。According to the embodiment of the present invention, the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter is obtained; the frequency offset estimation value is processed by the second-order loop filter to obtain the frequency offset compensation value; The frequency offset compensation value is used to compensate the receiver signal receiving frequency, which solves the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed, and the frequency compensation accuracy and frequency are improved. The anti-interference ability of the compensation improves the stability of the system.
附图说明DRAWINGS
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:
图1是根据本发明实施例的频率补偿处理方法的流程图；1 is a flow chart of a frequency compensation processing method according to an embodiment of the present invention;
图2是根据本发明实施例的频率补偿处理装置的结构框图；2 is a block diagram showing the structure of a frequency compensation processing apparatus according to an embodiment of the present invention;
图3是根据本发明实施例的频率补偿处理装置的结构框图一；3 is a block diagram 1 of a structure of a frequency compensation processing apparatus according to an embodiment of the present invention;
图4是根据本发明实施例的采用二阶负反馈环路的频偏估计方法的结构图；4 is a structural diagram of a frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention;
图5是现有技术中采用二阶负反馈环路的4次方频偏估计方法的结构图；5 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop in the prior art;
图6是根据本发明实施例的采用二阶负反馈环路的4次方频偏估计方法的结构图。6 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention.
具体实施方式detailed description
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。 The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.
在本实施例中提供了一种频率补偿处理方法，图1是根据本发明实施例的频率补偿处理方法的流程图，如图1所示，该流程包括如下步骤：In this embodiment, a frequency compensation processing method is provided. FIG. 1 is a flowchart of a frequency compensation processing method according to an embodiment of the present invention. As shown in FIG. 1, the flow includes the following steps:
步骤S102，获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；Step S102, acquiring a frequency offset estimation value between a signal receiving frequency of the receiver and a signal transmitting frequency of the transmitter;
步骤S104，通过二阶环路滤波器对频偏估计值进行处理，得到频偏补偿值；Step S104, processing the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value;
步骤S106，使用该频偏补偿值对接收机的信号接收频率进行补偿。Step S106, using the frequency offset compensation value to compensate the signal receiving frequency of the receiver.
通过上述步骤，利用二阶环路滤波器对接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值进行处理后，得到更加精确的频偏补偿值，以便于对接收机的信号接收频率进行补偿，相比于现有技术中，采用时域方法进行频率偏移的估计的计算精度达到一定范围后由于噪声的原因无法提高，而且易受突发的干扰噪声影响，导致频偏计算结果出错，通过上述步骤，提高了频率补偿的精度和频率补偿的抗干扰能力，提升了***的稳定性。Through the above steps, the second-order loop filter is used to process the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter, thereby obtaining a more accurate frequency offset compensation value, so as to facilitate the receiver. The signal receiving frequency is compensated. Compared with the prior art, the calculation accuracy of the frequency offset estimation using the time domain method reaches a certain range, and cannot be improved due to noise, and is susceptible to sudden interference noise, resulting in The frequency offset calculation result is wrong. Through the above steps, the accuracy of frequency compensation and the anti-interference ability of frequency compensation are improved, and the stability of the system is improved.
上述步骤S106中涉及到使用频偏补偿值对接收机的信号接收频率进行补偿，在一个优选实施例中，该步骤具体包括，将使用频偏补偿值对信号接收频率进行补偿，得到补偿后的信号接收频率，为了提高频率补偿值的精度，在另一优选实施例中，将补偿后的信号接收频率通过二阶环路滤波器进行处理，得到第一频偏补偿值，获取第一频偏补偿值与理论频偏值的差值；将差值依次经过多个或一个该二阶环路滤波器进行处理，得到最终的频偏补偿值，使用最终的频偏补偿值对补偿后的信号接收频率进行补偿。通过二阶环路滤波器对经过补偿后的接收信号的频率进行多次处理，提高了最终的频偏补偿值的精度。In the above step S106, the signal receiving frequency of the receiver is compensated by using the frequency offset compensation value. In a preferred embodiment, the step specifically includes: using the frequency offset compensation value to compensate the signal receiving frequency, and obtaining the compensated In order to improve the accuracy of the frequency compensation value, in another preferred embodiment, the compensated signal receiving frequency is processed by a second-order loop filter to obtain a first frequency offset compensation value, and the first frequency offset is obtained. The difference between the compensation value and the theoretical frequency offset value; the difference is sequentially processed by a plurality of or one of the second-order loop filters to obtain a final frequency offset compensation value, and the final frequency offset compensation value is used to compensate the signal. The receiving frequency is compensated. The frequency of the compensated received signal is processed a plurality of times by the second-order loop filter to improve the accuracy of the final frequency offset compensation value.
上述步骤S102中涉及到获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值，需要说明的是，该获取方式可以有很多种，下面对此进行举例说明。在一个优选实施例中，获取接收机接收的信号的频率与发射机发送的相应信号的频率之间的频偏估计值包括：将接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号，将得到的多个该第二计算结果进行累加得到第三计算结果，对第三计算结果求角度值，得到第四计算结果；将第四计算结果除以4得到频偏估计值。在另一优选实施例中，获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值包括：将间隔为N样点的接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中该N为大于1的自然数；将得到的多个第二计算结果进行累加 得到第三计算结果；对第三计算结果求角度值，得到第四计算结果；其中，求角度值为将第三计算结果乘以2倍的圆周率；将第四计算结果除以(4*N)得到频偏估计值。In the above step S102, the frequency offset estimation value between the signal receiving frequency of the acquisition receiver and the signal transmission frequency of the transmitter is involved. It should be noted that the acquisition manner may be various, which will be exemplified below. In a preferred embodiment, obtaining a frequency offset estimate between the frequency of the signal received by the receiver and the frequency of the corresponding signal transmitted by the transmitter comprises: multiplying the plurality of sets of adjacent signals received by the receiver by conjugate The first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein each set of adjacent signals includes two mutually adjacent signals, and the obtained plurality of second calculation results are accumulated to obtain a third calculation result, The third calculation result obtains an angle value to obtain a fourth calculation result; dividing the fourth calculation result by 4 to obtain a frequency offset estimation value. In another preferred embodiment, obtaining the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter comprises: multiplying the two signals received by the receiver with the interval of N samples by conjugate The obtained first calculation result is subjected to a fourth power operation to obtain a second calculation result, wherein the N is a natural number greater than 1; and the obtained plurality of second calculation results are accumulated Obtaining a third calculation result; obtaining an angle value for the third calculation result, obtaining a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2; and dividing the fourth calculation result by (4*N ) Get the frequency offset estimate.
在本实施例中还提供了一种频率补偿处理装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。In the embodiment, a frequency compensation processing device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
图2是根据本发明实施例的频率补偿处理装置的结构框图，如图2所示，该装置包括：获取模块22，设置为获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；处理模块24，连接至获取模块22，设置为通过二阶环路滤波器对频偏估计值进行处理，得到频偏补偿值；补偿模块26，连接至处理模块24，设置为使用频偏补偿值对接收机的信号接收频率进行补偿。2 is a structural block diagram of a frequency compensation processing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes: an acquisition module 22 configured to acquire a signal receiving frequency of a receiver and a signal transmission frequency of a transmitter. a frequency offset estimation value; the processing module 24 is connected to the obtaining module 22, configured to process the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value; and the compensation module 26 is connected to the processing module 24, and is set to The receiver's signal reception frequency is compensated using the frequency offset compensation value.
图3是根据本发明实施例的频率补偿处理装置的结构框图一，如图3所示，补偿模块26包括：第一补偿单元32，设置为将使用频偏补偿值对信号接收频率进行补偿，得到补偿后的信号接收频率；将补偿后的信号接收频率通过二阶环路滤波器进行处理，得到第一频偏补偿值；获取单元34，连接至第一补偿单元32，设置为获取第一频偏补偿值与理论频偏值的差值；第二补偿单元36，连接至获取单元34，设置为将差值依次经过多个或一个该二阶环路滤波器进行处理，得到最终的频偏补偿值，使用最终的频偏补偿值对补偿后的信号接收频率进行补偿。3 is a block diagram of a structure of a frequency compensation processing apparatus according to an embodiment of the present invention. As shown in FIG. 3, the compensation module 26 includes: a first compensation unit 32 configured to compensate a signal receiving frequency by using a frequency offset compensation value, The compensated signal receiving frequency is obtained; the compensated signal receiving frequency is processed by the second-order loop filter to obtain a first frequency offset compensation value; and the obtaining unit 34 is connected to the first compensation unit 32 and configured to acquire the first The difference between the frequency offset compensation value and the theoretical frequency offset value; the second compensation unit 36 is connected to the obtaining unit 34, and is configured to process the difference sequentially through multiple or one second-order loop filter to obtain a final frequency. The offset compensation value is used to compensate the compensated signal reception frequency using the final offset compensation value.
在本实施例中，获取模块22还设置为：将该接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号；将得到的多个第二计算结果进行累加得到第三计算结果；对第三计算结果求角度值，得到第四计算结果；其中，求角度值为将第三计算结果乘以2倍的圆周率；将第四计算结果除以4得到频偏估计值。In this embodiment, the obtaining module 22 is further configured to: perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying the plurality of sets of adjacent signals conjugates received by the receiver, wherein each group The adjacent signal includes two mutually adjacent signals; the obtained plurality of second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; wherein, the angle value is obtained The third calculation result is multiplied by 2 times the circumference ratio; the fourth calculation result is divided by 4 to obtain the frequency offset estimation value.
在本实施例中，获取模块22还设置为：将间隔为N样点的接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中该N为大于1的自然数；将得到的多个第二计算结果进行累加得到第三计算结果；对第三计算结果求角度值，得到第四计算结果；其中，求角度值为将第三计算结果乘以2倍的圆周率；将第四计算结果除以(4*N)得到频偏估计值。In this embodiment, the obtaining module 22 is further configured to perform a fourth calculation result by performing a fourth power calculation on the first calculation result obtained by multiplying two signals conjugates received by the receiver with the interval of N samples to obtain a second calculation result, wherein The N is a natural number greater than 1; the obtained plurality of second calculation results are accumulated to obtain a third calculation result; and the third calculation result is obtained by obtaining an angle value to obtain a fourth calculation result; wherein the angle value is the third calculation result The result is multiplied by a factor of 2; the fourth calculation result is divided by (4*N) to obtain a frequency offset estimate.
针对相关技术中存在的上述技术问题，下面结合优选实施例进行说明，该优选实施例结合了上述实施例及其优选实施方式。 The above-described technical problems existing in the related art will be described below in conjunction with the preferred embodiments, which combine the above-described embodiments and preferred embodiments thereof.
本优选实施例采用了二阶负反馈环路的方法进行时域的频偏补偿计算。并采用了逐渐加大用来计算相位差值的两个信号之间的间隔距离的方法。提高了频偏估计的精度。增强了频偏估计的稳定性。The preferred embodiment uses a second-order negative feedback loop method to perform time-domain frequency offset compensation calculation. A method of gradually increasing the separation distance between two signals for calculating the phase difference value is employed. The accuracy of the frequency offset estimation is improved. The stability of the frequency offset estimation is enhanced.
采用二阶负反馈环路的频偏估计方法的结构图如图4所示。The structure diagram of the frequency offset estimation method using the second-order negative feedback loop is shown in Fig. 4.
1.采用了二阶负反馈结构。每次频偏估计的结果经过二阶环路滤波器，输出结果作为频偏补偿值。补偿到输入的待频偏补偿数据上。1. A second-order negative feedback structure is employed. The result of each frequency offset estimation passes through a second-order loop filter, and the output result is used as a frequency offset compensation value. Compensation is applied to the input frequency offset compensation data.
2.输入的待频偏补偿数据经过环路输出的频偏补偿后，输出到下一级的计算模块该计算模块可以是图2中的补偿模块26。同时输入到采用二阶负反馈环路的频偏估计模块。如果环路输出的频偏补偿值和真实频偏值存在差值，经过频偏补偿后的数据则带有剩余频偏。剩余频偏经过频偏估计模块计算，计算结果经环路滤波，输出值是下一个频偏补偿值。这样不断的通过对剩余频偏的计算并补偿，输入到频偏估计模块的剩余频偏值逐渐减小，提高了频偏补偿的精度。2. The input to-be-bias compensation data is compensated by the frequency offset of the loop output, and then output to the calculation module of the next stage. The calculation module may be the compensation module 26 in FIG. At the same time, input to the frequency offset estimation module using the second-order negative feedback loop. If there is a difference between the frequency offset compensation value and the true frequency offset value of the loop output, the data after the frequency offset compensation has the residual frequency offset. The residual frequency offset is calculated by the frequency offset estimation module, and the calculation result is filtered by the loop, and the output value is the next frequency offset compensation value. In this way, by continuously calculating and compensating the residual frequency offset, the residual frequency offset value input to the frequency offset estimation module is gradually reduced, and the accuracy of the frequency offset compensation is improved.
3.二阶环路滤波器对多次的频偏估计值通过比例，积分的作用，消除了由于偶然因素，如突发噪声，造成的某次频偏估计值不准确的影响。提高了频偏补偿的抗干扰能力，提高了稳定性。3. The second-order loop filter eliminates the influence of the inaccuracy of a certain frequency offset estimation result caused by accidental factors such as burst noise. The anti-interference ability of the frequency offset compensation is improved, and the stability is improved.
采用二阶负反馈环路的频偏估计方法的频偏计算精度达到一定范围后，不能提高。为了提高频偏计算精度，采用了加大计算相位差值的两个信号的间隔的改进方法。After the frequency offset calculation method using the second-order negative feedback loop frequency offset estimation method reaches a certain range, it cannot be improved. In order to improve the accuracy of the frequency offset calculation, an improved method of increasing the interval between the two signals for calculating the phase difference value is adopted.
频偏估计的时域计算方法通常使用4次方计算的方法。The time domain calculation method of frequency offset estimation usually uses the method of 4th power calculation.
图5是现有技术中采用二阶负反馈环路的4次方频偏估计方法的结构图，如图5所示：FIG. 5 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop in the prior art, as shown in FIG. 5:
将相邻的两个信号Vk和Vk-1共轭相乘，再4次方，消除掉信息相位的差值。The adjacent two signals V k and V k-1 are multiplied by conjugate, and then the fourth power is used to eliminate the difference of the information phase.
将连续的多个信号的计算结果累加，消除掉噪声相位差值。The calculation results of a plurality of consecutive signals are accumulated to eliminate the noise phase difference value.
对计算结果求角度值，再除4，得到频偏估计值△ωTi。The angle value is obtained from the calculation result, and after dividing by 4, the frequency offset estimation value ΔωT i is obtained .
图6是根据本发明实施例的采用二阶负反馈环路的4次方频偏估计方法的结构图，改进后的4次方频偏估计的方法如图6所示。FIG. 6 is a structural diagram of a fourth-order square frequency offset estimation method using a second-order negative feedback loop according to an embodiment of the present invention. The improved fourth-order square frequency offset estimation method is shown in FIG. 6.
将间隔n个样点的信号Vk和Vk-n的共轭相乘，再4次方，消除掉信息相位的差值。 Multiplying the conjugates of the signals V k and V kn separated by n samples, and then 4 times, eliminates the difference in the phase of the information.
将连续的多个信号的计算结果累加，消除掉噪声相位差值。The calculation results of a plurality of consecutive signals are accumulated to eliminate the noise phase difference value.
对计算结果求角度值，再除(4*n)，得到频偏估计值△ωTi。The angle value is obtained from the calculation result, and after dividing (4*n), the frequency offset estimation value ΔωT i is obtained .
改进后的4次方频偏估计方法通过加大计算相位差值的两个样点的间隔，提高了相位差值，从而更容易从噪声中提取出来。提高了频偏估计的计算精度。The improved quadratic square frequency offset estimation method increases the phase difference by increasing the interval between two samples of the phase difference value, thereby making it easier to extract from the noise. The calculation accuracy of the frequency offset estimation is improved.
间隔距离n根据频偏估计的精度要求，剩余频偏的具体值，可实时调整。The separation distance n is based on the accuracy requirement of the frequency offset estimation, and the specific value of the residual frequency offset can be adjusted in real time.
综上所述，通过本发明，采用二阶负反馈环路，加大计算相位差值的样点间隔，这两种方法一起使用，提高了频偏估计的计算精度，增强了频偏估计的稳定性。算法易于实现，实现所需的硬件资源较少。In summary, according to the present invention, the second-order negative feedback loop is used to increase the sample interval for calculating the phase difference value, and the two methods are used together to improve the calculation accuracy of the frequency offset estimation and enhance the frequency offset estimation. stability. The algorithm is easy to implement and requires less hardware resources to implement.
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
工业实用性Industrial applicability
基于本发明实施例提供的上述技术方案，采用获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；通过二阶环路滤波器对频偏估计值进行处理，得到频偏补偿值；使用该频偏补偿值对接收机的信号接收频率进行补偿，解决了现有技术中无法更加准确的计算频率偏移值，进而无法进行有效的频率补偿的问题，提高了频率补偿的精度和频率补偿的抗干扰能力，提升了***的稳定性。 According to the foregoing technical solution provided by the embodiment of the present invention, the frequency offset estimation value between the signal receiving frequency of the receiver and the signal transmitting frequency of the transmitter is obtained; and the frequency offset estimation value is processed by the second-order loop filter to obtain The frequency offset compensation value is used to compensate the receiver signal receiving frequency by using the frequency offset compensation value, which solves the problem that the frequency offset value cannot be calculated more accurately in the prior art, and thus the effective frequency compensation cannot be performed, and the frequency is improved. The accuracy of the compensation and the anti-interference ability of the frequency compensation improve the stability of the system.

Claims (8)

  1. 一种频率补偿处理方法，包括：A frequency compensation processing method includes:
    获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；Obtaining a frequency offset estimation value between a signal receiving frequency of the receiver and a signal transmitting frequency of the transmitter;
    通过二阶环路滤波器对所述频偏估计值进行处理，得到频偏补偿值；The frequency offset estimation value is processed by a second-order loop filter to obtain a frequency offset compensation value;
    使用所述频偏补偿值对所述接收机的信号接收频率进行补偿。The signal reception frequency of the receiver is compensated using the frequency offset compensation value.
  2. 根据权利要求1所述的方法，其中，使用所述频偏补偿值对所述接收机的信号接收频率进行补偿包括：The method of claim 1 wherein compensating for a signal reception frequency of said receiver using said frequency offset compensation value comprises:
    将使用所述频偏补偿值对所述信号接收频率进行补偿，得到补偿后的信号接收频率；将所述补偿后的信号接收频率通过所述二阶环路滤波器进行处理，得到第一频偏补偿值；The signal receiving frequency is compensated by using the frequency offset compensation value to obtain a compensated signal receiving frequency; and the compensated signal receiving frequency is processed by the second-order loop filter to obtain a first frequency. Offset compensation value;
    获取所述第一频偏补偿值与理论频偏值的差值；Obtaining a difference between the first frequency offset compensation value and the theoretical frequency offset value;
    将所述差值依次经过多个或一个所述二阶环路滤波器进行处理，得到最终的频偏补偿值，使用所述最终的频偏补偿值对所述补偿后的信号接收频率进行补偿。And the difference is sequentially processed by using one or more of the second-order loop filters to obtain a final frequency offset compensation value, and the compensated signal receiving frequency is compensated by using the final frequency offset compensation value. .
  3. 根据权利要求1所述的方法，其中，获取接收机接收的信号的频率与发射机发送的相应信号的频率之间的频偏估计值包括：The method of claim 1 wherein obtaining a frequency offset estimate between a frequency of the signal received by the receiver and a frequency of the corresponding signal transmitted by the transmitter comprises:
    将所述接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号；Performing a fourth calculation result by performing a fourth power calculation by multiplying a plurality of sets of adjacent signals received by the receiver by a conjugate to obtain a second calculation result, where each set of adjacent signals includes two mutually adjacent signals;
    将得到的多个所述第二计算结果进行累加得到第三计算结果；And accumulating the obtained plurality of second calculation results to obtain a third calculation result;
    对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；Calculating an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2;
    将所述第四计算结果除以4得到所述频偏估计值。Dividing the fourth calculation result by 4 to obtain the frequency offset estimation value.
  4. 根据权利要求1所述的方法，其中，获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值包括：The method of claim 1, wherein obtaining a frequency offset estimate between a signal receiving frequency of the receiver and a signal transmitting frequency of the transmitter comprises:
    将间隔为N样点的所述接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中所述N为大于1的自然数；Performing a fourth calculation result by multiplying a first calculation result obtained by multiplying two signals conjugates received by the receiver with an interval of N samples to obtain a second calculation result, wherein the N is a natural number greater than 1;
    将得到的多个所述第二计算结果进行累加得到第三计算结果； And accumulating the obtained plurality of second calculation results to obtain a third calculation result;
    对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；Calculating an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2;
    将所述第四计算结果除以(4*N)得到所述频偏估计值。The frequency offset estimation value is obtained by dividing the fourth calculation result by (4*N).
  5. 一种频率补偿处理装置，包括：A frequency compensation processing device includes:
    获取模块，设置为获取接收机的信号接收频率与发射机的信号发送频率之间的频偏估计值；Obtaining a module, configured to obtain a frequency offset estimation value between a signal receiving frequency of the receiver and a signal transmitting frequency of the transmitter;
    处理模块，设置为通过二阶环路滤波器对所述频偏估计值进行处理，得到频偏补偿值；a processing module, configured to process the frequency offset estimation value by using a second-order loop filter to obtain a frequency offset compensation value;
    补偿模块，设置为使用所述频偏补偿值对所述接收机的信号接收频率进行补偿。And a compensation module configured to compensate the signal receiving frequency of the receiver by using the frequency offset compensation value.
  6. 根据权利要求5所述的装置，其中，所述补偿模块包括：The apparatus of claim 5 wherein said compensation module comprises:
    第一补偿单元，设置为将使用所述频偏补偿值对所述信号接收频率进行补偿，得到补偿后的信号接收频率；将所述补偿后的信号接收频率通过所述二阶环路滤波器进行处理，得到第一频偏补偿值；a first compensation unit configured to compensate the signal receiving frequency by using the frequency offset compensation value to obtain a compensated signal receiving frequency; and pass the compensated signal receiving frequency to the second-order loop filter Processing to obtain a first frequency offset compensation value;
    获取单元，设置为获取所述第一频偏补偿值与理论频偏值的差值；An acquiring unit, configured to obtain a difference between the first frequency offset compensation value and a theoretical frequency offset value;
    第二补偿单元，设置为将所述差值依次经过多个或一个所述二阶环路滤波器进行处理，得到最终的频偏补偿值，使用所述最终的频偏补偿值对所述补偿后的信号接收频率进行补偿。a second compensation unit, configured to process the difference sequentially through a plurality of or one of the second-order loop filters to obtain a final frequency offset compensation value, and use the final frequency offset compensation value to compensate the The subsequent signal reception frequency is compensated.
  7. 根据权利要求5所述的装置，其中，其中，所述获取模块还设置为：The device according to claim 5, wherein the obtaining module is further configured to:
    将所述接收机接收的多组相邻信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中，每组相邻信号包括两个互相相邻的信号；Performing a fourth calculation result by performing a fourth power calculation by multiplying a plurality of sets of adjacent signals received by the receiver by a conjugate to obtain a second calculation result, where each set of adjacent signals includes two mutually adjacent signals;
    将得到的多个所述第二计算结果进行累加得到第三计算结果；And accumulating the obtained plurality of second calculation results to obtain a third calculation result;
    对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；Calculating an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2;
    将所述第四计算结果除以4得到所述频偏估计值。Dividing the fourth calculation result by 4 to obtain the frequency offset estimation value.
  8. 根据权利要求5所述的装置，其中，所述获取模块还设置为：The apparatus according to claim 5, wherein the obtaining module is further configured to:
    将间隔为N样点的所述接收机接收的两个信号共轭相乘后得到的第一计算结果进行四次方运算得到第二计算结果，其中所述N为大于1的自然数； Performing a fourth calculation result by multiplying a first calculation result obtained by multiplying two signals conjugates received by the receiver with an interval of N samples to obtain a second calculation result, wherein the N is a natural number greater than 1;
    将得到的多个所述第二计算结果进行累加得到第三计算结果；And accumulating the obtained plurality of second calculation results to obtain a third calculation result;
    对所述第三计算结果求角度值，得到第四计算结果；其中，求角度值为将所述第三计算结果乘以2倍的圆周率；Calculating an angle value for the third calculation result, to obtain a fourth calculation result; wherein, the angle value is obtained by multiplying the third calculation result by a factor of 2;
    将所述第四计算结果除以(4*N)得到所述频偏估计值。 The frequency offset estimation value is obtained by dividing the fourth calculation result by (4*N).
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