WO2022174841A1 - G3-plc电力载波线系统的非线性预均衡装置和方法 - Google Patents

G3-plc电力载波线系统的非线性预均衡装置和方法 Download PDF

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WO2022174841A1
WO2022174841A1 PCT/CN2022/077869 CN2022077869W WO2022174841A1 WO 2022174841 A1 WO2022174841 A1 WO 2022174841A1 CN 2022077869 W CN2022077869 W CN 2022077869W WO 2022174841 A1 WO2022174841 A1 WO 2022174841A1
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equalization
nonlinear
module
response
signal
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French (fr)
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张宏亮
钱海锋
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Hangzhou Vango Technologies Inc
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Hangzhou Vango Technologies Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/544—Setting up communications; Call and signalling arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • the invention belongs to the field of carrier communication, and in particular relates to a nonlinear pre-equalization device and method of a G3-PLC power carrier line system.
  • G3-PLC Power line Communication, power carrier communication
  • the receiving end receives the signal of the transmitting end, and after the demodulation is successful, the receiving end will feed back the channel equalization coefficient to the transmitting end.
  • the transmitter generates a pre-equalization coefficient according to this feedback. Due to the serious interference on the power line, in some cases, the receiver cannot demodulate the signal of the transmitter. In this case, the transmitter will not generate pre-equalization coefficients.
  • the G3-PLC power carrier signal will produce nonlinear distortion at the transmitter, which we call the local channel response of the transmitter. This nonlinear distortion will seriously affect the signal quality and increase the complexity and difficulty of the receiving end. Therefore, it is very meaningful to eliminate or reduce the nonlinear distortion of the signal at the transmitter without affecting the transmit power.
  • the technical problem to be solved by the present invention is to provide a nonlinear pre-equalization device and method for the G3-PLC power carrier line system in view of the deficiencies of the prior art.
  • a nonlinear pre-equalization device of a G3-PLC power carrier line system which is applied to the transmitter of the G3-PLC power carrier line system, including a G3-PLC baseband data module, a non-linear Linear pre-equalization implementation module, DA (Digital-to-Analogue) digital-to-analog conversion module, local channel nonlinear response module, AD (Analogue-to-Digital) analog-to-digital conversion module and nonlinear pre-equalization coefficient calculation module,
  • the G3-PLC baseband data module is used to generate G3-PLC baseband data, and send the G3-PLC baseband data to the nonlinear pre-equalization implementation module;
  • the nonlinear pre-equalization implementation module is used to perform nonlinear pre-equalization on the G3-PLC baseband data, obtain pre-equalization data, and send the pre-equalization data to the DA digital-to-analog conversion module and the nonlinear pre-equalization coefficient calculation module ;
  • the nonlinear pre-equalization response of the nonlinear pre-equalization realization module can cancel the nonlinear response distortion generated by the nonlinear response module of the local channel in advance;
  • the DA digital-to-analog conversion module is used to convert the pre-equalized data into an analog signal, and send the analog signal to the local channel nonlinear response module;
  • the local channel nonlinear response module is used to filter, amplify and couple the analog signal to the power line to obtain a transmission signal, and send the transmission signal to the AD analog-to-digital conversion module and the G3-PLC through the receiving circuit The receiving end of the power carrier line system;
  • the AD analog-to-digital conversion module is used to convert the transmitted signal into a digital signal and send it to the nonlinear pre-equalization coefficient calculation module;
  • the nonlinear pre-equalization coefficient calculation module is used to calculate and obtain the pre-equalization coefficient according to the input digital signal and the pre-equalization data, and feed back the pre-equalization coefficient to the nonlinear pre-equalization realization module, and the pre-equalization coefficient is used for Nonlinear pre-equalization.
  • the local channel nonlinear response module includes a transmitting-end analog filter, a line driver and a local transmitting power line, and the analog signal is input to the transmitting-end analog filter for signal filtering processing, Filter out the signal out-of-band spurs to obtain the filtered analog signal; input the filtered analog signal into the line driver for signal amplification to obtain the amplified analog signal; couple the amplified analog signal to the local transmitting power line to obtain the transmitted signal .
  • the nonlinear pre-equalization response of the nonlinear pre-equalization implementation module is the same as the inverse curve of the local channel nonlinear response of the local channel nonlinear response module.
  • the two channel responses are combined to form a linear channel response.
  • the nonlinear pre-equalization response can cancel the nonlinear response distortion generated by the local channel nonlinear response module in advance, so that the quality of the signal received at the receiving end can be greatly improved.
  • the decoding success rate of the receiving end can be improved.
  • the nonlinear response distortion generated by the local channel nonlinear response module includes nonlinear distortion of the analog filter at the transmitting end, nonlinear distortion of the line driver, and mismatch of the local transmit power line load
  • the resulting nonlinear distortion includes nonlinear distortion of amplitude phase and multipath.
  • Transmitter analog filter due to manufacturing reasons, the transformation of amplitude and phase is not strictly linear transformation, so there will be nonlinear distortion.
  • the output signal of the line driver is a linear amplification of the input signal, and this output range will change with the change of temperature.
  • the peak value of the data will exceed the working range of the line driver, resulting in severe nonlinear amplification.
  • the electronic devices of the line driver also have memory effects, which will also cause the output signal to produce phase nonlinear transformation.
  • Local transmission power lines, load fluctuations of the power grid and dynamic changes in the network topology will also have a great impact on the signal, which also includes amplitude and phase nonlinearity.
  • a nonlinear pre-equalization method for a G3-PLC power carrier line system comprising the following steps:
  • Step 1 perform nonlinear pre-equalization on the G3-PLC baseband data to obtain pre-equalization data
  • Step 2 converting the pre-equalization data into an analog signal, and sending it to the local channel nonlinear response module to obtain a transmission signal;
  • Step 3 Convert the transmitted signal into a digital signal and send it to the nonlinear pre-equalization coefficient calculation module; calculate and obtain the pre-equalization coefficient according to the digital signal and the pre-equalization data;
  • step 4 the pre-equalization coefficients are fed back to the nonlinear pre-equalization realization module to obtain the nonlinear pre-equalization response.
  • the pre-equalization coefficients in step 3 are the nonlinear pre-equalization response coefficients of the nonlinear pre-equalization implementation module, according to the inverse of the local channel nonlinear response of the local channel nonlinear response module. Calculated from the curve.
  • the obtained nonlinear pre-equalization response coefficient is used to perform nonlinear pre-equalization on the G3-PLC baseband data, which can cancel the nonlinear response distortion generated by the local channel nonlinear response module in advance, so that the signal quality received by the receiving end can be compared. A large improvement can improve the decoding success rate of the receiving end.
  • the pre-equalization coefficients in step 3 are obtained through matrix decomposition calculation.
  • the pre-equalization data in step 1 is denoted as
  • the digital signal in step 3 is N is the number of samples of the pre-equalized data and digital signal, n is the sample point, 1 ⁇ n ⁇ N, the pre-equalization coefficient is a kq , k is the nonlinear parameter, q is the multipath parameter, 1 ⁇ k ⁇ K, 0 ⁇ q ⁇ Q-1, K is the maximum order of amplitude nonlinear distortion, Q is the maximum order of phase nonlinear distortion, 1 ⁇ K ⁇ 6, 1 ⁇ Q ⁇ 6;
  • step 3 the pre-equalization coefficient is calculated and obtained according to the digital signal and the pre-equalization data as formula (1):
  • the matrix M is composed of digital signals According to the matrix formed by formula (2), the size is (NQ)*(K*Q);
  • the pre-equalization coefficient akq is obtained by solving according to formula (4).
  • the nonlinear pre-equalization coefficient calculation module calculates the pre-equalization coefficient akq every time T, in order to update the channel transformation generated by the device temperature and network topology transformation in real time,
  • the pre-equalization coefficient a kq should be updated at a maximum interval of 1 minute, that is, T ⁇ 1 minute;
  • the nonlinear pre-equalization implementation module updates the nonlinear pre-equalization response according to the pre-equalization coefficient a kq , which is recorded in step 1.
  • the G3-PLC baseband data is
  • the nonlinear pre-equalization response is formula (5):
  • the pre-equalization coefficient akq is calculated every time T, and the linear pre-equalization response is updated to adapt to the channel changes of the transmitting equipment due to factors such as aging, temperature changes, or power changes.
  • the number of samples N of the pre-equalized data and the digital signal is 2048
  • the maximum order K of the amplitude nonlinear distortion is 5
  • the maximum order of the phase nonlinear distortion is 5.
  • the value of Q is 4.
  • the problem to be solved in this application is to add a nonlinear pre-equalization implementation module before the signal is sent to the DA analog-to-digital conversion module.
  • the channel response of this nonlinear pre-equalization implementation module is opposite to the nonlinear response of the transmitter's local channel, that is The linear pre-equalization response can pre-cancel the nonlinear response distortion produced by the local channel nonlinear response module. In this way, the two channel responses are combined to form a linear channel response.
  • the transmitted signal is the signal after distortion compensation. .
  • the present application is a pre-equalization method based on local feedback.
  • the signal transmitted by the transmitting end is received through the receiving link on the local transmitting power line, and then the pre-equalization coefficient is generated by calculation according to the transmitting signal and the receiving signal to correct the matching of the transmitting end analog filter, line driver and local transmitting power line load. phase magnitude and multipath distortion. In this way, the quality of the signal received by the receiving end can be greatly improved, and the decoding success rate of the receiving end can be improved.
  • the nonlinear pre-equalization realization module is added before the local channel nonlinear response module, the transmission power of the line driver in the local channel nonlinear response module is increased, and the distortion of the transmitted signal will not increase, thereby improving the line driver. effective workspace.
  • FIG. 1 is a schematic structural diagram of a nonlinear pre-equalization device of a G3-PLC power carrier line system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a nonlinear pre-equalization method for a G3-PLC power carrier line system provided by an embodiment of the present application.
  • the embodiments of the present application provide a nonlinear pre-equalization device and method for a G3-PLC power carrier line system, which can be applied to application scenarios such as remote data acquisition of meters, remote control of household appliances, and data analysis and processing of control systems: 1. It can be Collect remote data collection of various meters; 2. Use G3-PLC to connect various household appliances, and then connect G3-PLC to the Internet to realize remote control; 3. Big data analysis and processing, G3-PLC can complete data collection, Analysis and processing, such as mathematical operations, data transmission, data conversion, sorting, table look-up and bit operations, etc., and these data can be compared with the reference value stored in the memory to complete certain control operations. Data processing is often used in large control systems.
  • the first embodiment of the present application discloses a nonlinear pre-equalization device of a G3-PLC power carrier line system, which is applied to the transmitter of the G3-PLC power carrier line system, and includes a G3-PLC baseband data module, Nonlinear pre-equalization realization module, DA digital-to-analog conversion module, local channel nonlinear response module, AD analog-to-digital conversion module and nonlinear pre-equalization coefficient calculation module,
  • the G3-PLC baseband data module is used to generate G3-PLC baseband data, and send the G3-PLC baseband data to the nonlinear pre-equalization implementation module;
  • the nonlinear pre-equalization implementation module is used to perform nonlinear pre-equalization on the G3-PLC baseband data, obtain pre-equalization data, and send the pre-equalization data to the DA digital-to-analog conversion module and the nonlinear pre-equalization coefficient calculation module ;
  • the nonlinear pre-equalization response of the nonlinear pre-equalization realization module can cancel the nonlinear response distortion generated by the nonlinear response module of the local channel in advance;
  • the DA digital-to-analog conversion module is used to convert the pre-equalized data into an analog signal, and send the analog signal to the local channel nonlinear response module;
  • the local channel nonlinear response module is used to filter, amplify and couple the analog signal to the power line to obtain a transmission signal, and send the transmission signal to the AD analog-to-digital conversion module and the G3-PLC power carrier line the receiver of the system;
  • the AD analog-to-digital conversion module is used to convert the transmitted signal into a digital signal and send it to the nonlinear pre-equalization coefficient calculation module;
  • the nonlinear pre-equalization coefficient calculation module is used to calculate and obtain the pre-equalization coefficient according to the input digital signal and the pre-equalization data, and feed back the pre-equalization coefficient to the nonlinear pre-equalization realization module, and the pre-equalization coefficient is used for Nonlinear pre-equalization.
  • the local channel nonlinear response module includes a transmitting-end analog filter, a line driver and a local transmitting power line, and the analog signal is input to the transmitting-end analog filter for signal filtering processing to filter out out-of-band noise of the signal.
  • the filtered analog signal is input to the line driver for signal amplification to obtain the amplified analog signal; the amplified analog signal is coupled to the local transmitting power line to obtain the transmitting signal.
  • the nonlinear pre-equalization response of the nonlinear pre-equalization implementation module is the same as the inverse curve of the local channel nonlinear response of the local channel nonlinear response module.
  • the nonlinear response distortion generated by the local channel nonlinear response module includes the nonlinear distortion of the analog filter at the transmitter, the nonlinear distortion of the line driver, and the nonlinear distortion caused by the mismatch of the local transmit power line load,
  • the nonlinear distortion includes nonlinear distortion of amplitude phase and multipath.
  • a second embodiment of the present application discloses a nonlinear pre-equalization method for a G3-PLC power carrier line system, including the following steps:
  • Step 1 perform nonlinear pre-equalization on the G3-PLC baseband data to obtain pre-equalization data
  • Step 2 converting the pre-equalization data into an analog signal, and sending it to the local channel nonlinear response module to obtain a transmission signal;
  • Step 3 Convert the transmitted signal into a digital signal and send it to the nonlinear pre-equalization coefficient calculation module; calculate and obtain the pre-equalization coefficient according to the digital signal and the pre-equalization data;
  • step 4 the pre-equalization coefficients are fed back to the nonlinear pre-equalization realization module to obtain the nonlinear pre-equalization response.
  • the pre-equalization coefficient in step 3 is the nonlinear pre-equalization response coefficient of the nonlinear pre-equalization implementation module, which is calculated and obtained according to the inverse curve of the local channel nonlinear response of the local channel nonlinear response module.
  • the pre-equalization coefficients in step 3 are obtained by matrix decomposition calculation.
  • the pre-equalization data in step 1 denotes the pre-equalization data in step 1 as
  • the input end of the DA digital-to-analog conversion module can record the pre-equalization data
  • the digital signal is The output end of the AD analog-to-digital conversion module can record the digital signal
  • N is the number of samples of the pre-equalized data and the digital signal
  • n is the sample point, 1 ⁇ n ⁇ N
  • the pre-equalization coefficient is recorded as a kq
  • k represents non- Linear parameter
  • q represents multipath parameter, 1 ⁇ k ⁇ K, 0 ⁇ q ⁇ Q-1
  • K is the maximum order of amplitude nonlinear distortion
  • Q is the maximum order of phase nonlinear distortion, 1 ⁇ K ⁇ 6, 1 ⁇ Q ⁇ 6;
  • step 3 the pre-equalization coefficient is calculated and obtained according to the digital signal and the pre-equalization data as formula (1):
  • the matrix M is composed of digital signals According to the matrix formed by formula (2), the size is (NQ)*(K*Q);
  • the pre-equalization coefficient akq is obtained by solving according to formula (4).
  • the nonlinear pre-equalization coefficient calculation module in step 3 calculates the pre-equalization coefficient a kq every time T, T ⁇ 1 minute; in step 4, the nonlinear pre-equalization realization module updates the non-linear pre-equalization coefficient a kq according to the pre-equalization coefficient a kq Linear pre-equalization response, record the G3-PLC baseband data in step 1 as
  • the nonlinear pre-equalization response is formula (5):
  • the sample number N of the pre-equalized data and the digital signal is 2048
  • the maximum order K of the amplitude nonlinear distortion is 5
  • the maximum order Q of the phase nonlinear distortion is 4.
  • the present invention provides a non-linear pre-equalization device and method for a G3-PLC power carrier line system.
  • the above are only specific embodiments of the present invention.
  • several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

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Abstract

本发明公开了一种G3-PLC电力载波线系统的非线性预均衡装置和方法，该方法包括步骤1，对G3-PLC基带数据进行非线性预均衡，获得预均衡数据；步骤2，将预均衡数据转换为模拟信号，发送至本地信道非线性响应模块，获得发射信号；步骤3，将发射信号转换为数字信号，发送至非线性预均衡系数计算模块；根据数字信号和预均衡数据计算获得预均衡系数；步骤4，将预均衡系数反馈至非线性预均衡实现模块，获得非线性预均衡响应。该方法在发射端基于本地反馈的预均衡，使得接收端收到的信号质量就能得到比较大的提升，能改善接收端的解码成功率。

Description

G3-PLC电力载波线系统的非线性预均衡装置和方法 技术领域
本发明属于载波通信领域，尤其涉及一种G3-PLC电力载波线系统的非线性预均衡装置和方法。
背景技术
现有技术中G3-PLC(Power line Communication，电力载波通信)是基于接收端的信号均衡，即在接收端收到发射端的信号，并且解调成功之后，接收端会把信道均衡系数反馈给发射端，发射端根据这个反馈来产生一个预均衡的系数。由于电力线上，干扰很严重，有些情况下接收端不能解调发射端的信号，在这种情况下，发射端就不会产生预均衡系数。
G3-PLC电力载波信号在发射机端会产生非线性失真，我们称这个非线性失真为发射机的本地信道响应。这个非线性失真会严重影响信号质量，增加接收端的复杂度和难度。因此在不影响发射功率的前提下，消除或减少发射端信号的非线性失真，是个很有意义的事情。
发明内容
发明目的：本发明所要解决的技术问题是针对现有技术的不足，提供一种G3-PLC电力载波线系统的非线性预均衡装置和方法。
为了解决上述技术问题，第一方面，公开了一种G3-PLC电力载波线系统的非线性预均衡装置，应用于G3-PLC电力载波线系统的发射端，包括G3-PLC基带数据模块、非线性预均衡实现模块、DA(Digital-to-Analogue)数模转换模块、本地信道非线性响应模块、AD(Analogue-to-Digital)模数转换模块和非线性预均衡系数计算模块，
所述G3-PLC基带数据模块，用于产生G3-PLC基带数据，并将所述G3-PLC基带数据发送至非线性预均衡实现模块；
所述非线性预均衡实现模块，用于对G3-PLC基带数据进行非线性预均衡，获得预均衡数据，并将所述预均衡数据发送至DA数模转换模块和非线性预均衡系数计算模块；非线性预均衡实现模块的非线性预均衡响应能够预先抵消本地信道非线性响应模块产生的非线性响应失真；
所述DA数模转换模块，用于将预均衡数据转换为模拟信号，并将所述模拟信号发送至本地信道非线性响应模块；
所述本地信道非线性响应模块，用于将所述模拟信号进行信号滤波、放大以及耦合至电力线，获得发射信号，并将所述发射信号经过接收电路发送至AD模数转换模块和G3-PLC电力载波线系统的接收端；
所述AD模数转换模块，用于将发射信号转换为数字信号，并发送至非线性预均衡系数计算模块；
所述非线性预均衡系数计算模块，用于根据输入的数字信号和预均衡数据计算获得预均衡系数，并将所述预均衡系数反馈至非线性预均衡实现模块，所述预均衡系数用于非线性预均衡。
结合第一方面，在一种实现方式中，所述本地信道非线性响应模块包括发射端模拟滤波器、线路驱动器和本地发射电力线，将所述模拟信号输入发射端模拟滤波器进行信号滤波处理，滤除信号带外杂散，获得滤波后的模拟信号；将滤波后的模拟信号输入线路驱动器进行信号放大，获得放大后的模拟信号；将放大后的模拟信号耦合至本地发射电力线，获得发射信号。
结合第一方面，在一种实现方式中，非线性预均衡实现模块的非线性预均衡响应与本地信道非线性响应模块的本地信道非线性响应的反向曲线相同。两个信道响应合起来形成一个线性的信道响应，非线性预均衡响应能够预先抵消本地信道非线性响应模块产生的非线性响应失真，从而使得接收端收到的信号质量能够得到比较大的提升，能够改善接收端的解码成功率。
结合第一方面，在一种实现方式中，所述本地信道非线性响应模块产生的非线性响应失真包括发射端模拟滤波器的非线性失真、线路驱动器的非线性失真和本地发射电力线负载不匹配产生的非线性失真，所述非线性失真包括幅度相位和多径的非线性失真。
发射端模拟滤波器，由于生产制造的原因，幅度和相位的变换不是严格的线性变换，这样就会存在非线性失真。线路驱动器理论上在一定输出范围内，输出的信号是输入信号的线性放大，而且这个输出范围会随着温度的变换而变换。但是在实际应用中，数据的峰值会超过线路驱动器的工作范围，产生严重的非线性放大，线路驱动器 的电子器件也存在记忆效应，这也会使得输出的信号产生相位非线性变换。本地发射电力线，电网的负载波动与网络拓扑结构的动态变化，也会对信号产生很大的影响，这个影响也包括幅度和相位的非线性。
第二方面，公开了一种G3-PLC电力载波线系统的非线性预均衡方法，包括以下步骤：
步骤1，对G3-PLC基带数据进行非线性预均衡，获得预均衡数据；
步骤2，将预均衡数据转换为模拟信号，发送至本地信道非线性响应模块，获得发射信号；
步骤3，将发射信号转换为数字信号，发送至非线性预均衡系数计算模块；根据数字信号和预均衡数据计算获得预均衡系数；
步骤4，将预均衡系数反馈至非线性预均衡实现模块，获得非线性预均衡响应。
结合第二方面，在一种实现方式中，步骤3中所述预均衡系数为非线性预均衡实现模块的非线性预均衡响应系数，根据本地信道非线性响应模块的本地信道非线性响应的反向曲线计算获得。获得的非线性预均衡响应系数用于对G3-PLC基带数据进行非线性预均衡，能够预先抵消本地信道非线性响应模块产生的非线性响应失真，从而使得接收端收到的信号质量能够得到比较大的提升，能够改善接收端的解码成功率。
结合第二方面，在一种实现方式中，步骤3中所述预均衡系数采用矩阵分解计算获得。
结合第二方面，在一种实现方式中，记步骤1中预均衡数据为
Figure PCTCN2022077869-appb-000001
步骤3中数字信号为
Figure PCTCN2022077869-appb-000002
N为预均衡数据和数字信号的样本个数，n为样本点，1≤n≤N，记预均衡系数为a kq，k表示非线性参数，q表示多径参数，1≤k≤K，0≤q≤Q-1，K为幅度非线性失真最大阶数，Q为相位非线性失真最大阶数，1≤K≤6，1≤Q≤6；
记本地信道非线性响应的反向曲线为B(n)＝f(A(n))，步骤3中根据数字信号和预均衡数据计算获得预均衡系数为公式(1)：
Figure PCTCN2022077869-appb-000003
将公式(1)展开为公式(2)：
Figure PCTCN2022077869-appb-000004
将公式(2)合并为公式(3)：
Figure PCTCN2022077869-appb-000005
其中，矩阵M为由数字信号
Figure PCTCN2022077869-appb-000006
根据公式(2)构成的矩阵，大小为(N-Q)*(K*Q)；
变换公式(3)，得到公式(4)：
Figure PCTCN2022077869-appb-000007
根据公式(4)求解获得预均衡系数a kq。
结合第二方面，在一种实现方式中，步骤3中非线性预均衡系数计算模块每隔时间T计算一次预均衡系数a kq，为了实时更新设备温度和网络拓补变换而产生的信道变换，预均衡系数a kq要保持更新一次的间隔最大为1分钟，即T≤1分钟；步骤4中非线性预均衡实现模块根据预均衡系数a kq更新非线性预均衡响应，记步骤1中所述G3-PLC基带数据为
Figure PCTCN2022077869-appb-000008
所述非线性预均衡响应为公式(5)：
Figure PCTCN2022077869-appb-000009
每隔时间T计算一次预均衡系数a kq，并对线性预均衡响应进行更新，以适应发射设备因为老化、温度变化或功率变化等因素而产生的信道变化。
结合第二方面，在一种实现方式中，所述预均衡数据和数字信号的样本个数N取值为2048，幅度非线性失真最大阶数K取值为5，相位非线性失真最大阶数Q取值为 4。
有益效果：
本申请要解决的问题就是在信号送给DA模数转化模块之前，增加一个非线性预均衡实现模块，这个非线性预均衡实现模块的信道响应和发射机的本地信道非线性响应相反，即非线性预均衡响应能够预先抵消本地信道非线性响应模块产生的非线性响应失真。这样两个信道响应合起来形成一个线性的信道响应，G3-PLC发射端的G3-PLC基带数据经过非线性预均衡实现模块和本地信道非线性响应模块后，发射出去的信号就是失真补偿后的信号。
本申请是基于本地反馈的预均衡方法。发射端发射的信号，在本地发射电力线上就通过接收链路接收，然后根据发射信号和接收信号，通过运算产生预均衡系数，来纠正发射端模拟滤波器、线路驱动器和本地发射电力线负载匹配产生的相位幅度和多径的失真。这样接收端收到的信号质量就能得到比较大的提升，能改善接收端的解码成功率。
本申请中由于在本地信道非线性响应模块之前增加了非线性预均衡实现模块，增加了本地信道非线性响应模块中线路驱动器的发射功率，发射的信号失真情况不会增加，从而提升了线路驱动器的有效工作区。
附图说明
下面结合附图和具体实施方式对本发明做更进一步的具体说明，本发明的上述和/或其他方面的优点将会变得更加清楚。
图1为本申请实施例提供的G3-PLC电力载波线系统的非线性预均衡装置结构示意图。
图2为本申请实施例提供的G3-PLC电力载波线系统的非线性预均衡方法流程示意图。
具体实施方式
下面将结合附图，对本发明的实施例进行描述。
本申请实施例提供了一种G3-PLC电力载波线系统的非线性预均衡装置和方法，可以应用于计量表远程数据采集、家用电器远程控制和控制系统数据分析处理等应用场景：1、可以采集各种计量表的远程数据收集；2、用G3-PLC连接各种家用电器， 然后G3-PLC和互联网连接，实现远程控制；3、大数据分析处理，G3-PLC可以完成数据的采集、分析及处理，比如数学运算、数据传送、数据转换、排序、查表及位操作等，而这些数据就可以与存储在存储器中的参考值来比较，从而完成一定的控制操作。数据处理常用于大型的控制系统上。
如图1所示，本申请第一实施例公开一种G3-PLC电力载波线系统的非线性预均衡装置，应用于G3-PLC电力载波线系统的发射端，包括G3-PLC基带数据模块、非线性预均衡实现模块、DA数模转换模块、本地信道非线性响应模块、AD模数转换模块和非线性预均衡系数计算模块，
所述G3-PLC基带数据模块，用于产生G3-PLC基带数据，并将所述G3-PLC基带数据发送至非线性预均衡实现模块；
所述非线性预均衡实现模块，用于对G3-PLC基带数据进行非线性预均衡，获得预均衡数据，并将所述预均衡数据发送至DA数模转换模块和非线性预均衡系数计算模块；非线性预均衡实现模块的非线性预均衡响应能够预先抵消本地信道非线性响应模块产生的非线性响应失真；
所述DA数模转换模块，用于将预均衡数据转换为模拟信号，并将所述模拟信号发送至本地信道非线性响应模块；
所述本地信道非线性响应模块，用于将所述模拟信号进行信号滤波、放大以及耦合至电力线，获得发射信号，并将所述发射信号发送至AD模数转换模块和G3-PLC电力载波线系统的接收端；
所述AD模数转换模块，用于将发射信号转换为数字信号，并发送至非线性预均衡系数计算模块；
所述非线性预均衡系数计算模块，用于根据输入的数字信号和预均衡数据计算获得预均衡系数，并将所述预均衡系数反馈至非线性预均衡实现模块，所述预均衡系数用于非线性预均衡。
第一实施例中，所述本地信道非线性响应模块包括发射端模拟滤波器、线路驱动器和本地发射电力线，将所述模拟信号输入发射端模拟滤波器进行信号滤波处理，滤除信号带外杂散，获得滤波后的模拟信号；将滤波后的模拟信号输入线路驱动器进行信号放大，获得放大后的模拟信号；将放大后的模拟信号耦合至本地发射电力线，获 得发射信号。
第一实施例中，非线性预均衡实现模块的非线性预均衡响应与本地信道非线性响应模块的本地信道非线性响应的反向曲线相同。
第一实施例中，所述本地信道非线性响应模块产生的非线性响应失真包括发射端模拟滤波器的非线性失真、线路驱动器的非线性失真和本地发射电力线负载不匹配产生的非线性失真，所述非线性失真包括幅度相位和多径的非线性失真。
如图2所示，本申请第二实施例公开一种G3-PLC电力载波线系统的非线性预均衡方法，包括以下步骤：
步骤1，对G3-PLC基带数据进行非线性预均衡，获得预均衡数据；
步骤2，将预均衡数据转换为模拟信号，发送至本地信道非线性响应模块，获得发射信号；
步骤3，将发射信号转换为数字信号，发送至非线性预均衡系数计算模块；根据数字信号和预均衡数据计算获得预均衡系数；
步骤4，将预均衡系数反馈至非线性预均衡实现模块，获得非线性预均衡响应。
第二实施例中，步骤3中所述预均衡系数为非线性预均衡实现模块的非线性预均衡响应系数，根据本地信道非线性响应模块的本地信道非线性响应的反向曲线计算获得。
第二实施例中，步骤3中所述预均衡系数采用矩阵分解计算获得。
第二实施例中，记步骤1中预均衡数据为
Figure PCTCN2022077869-appb-000010
DA数模转换模块的输入端能够记录所述预均衡数据；步骤3中数字信号为
Figure PCTCN2022077869-appb-000011
AD模数转换模块的输出端能够记录所述数字信号；N为预均衡数据和数字信号的样本个数，n为样本点，1≤n≤N，记预均衡系数为a kq，k表示非线性参数，q表示多径参数，1≤k≤K，0≤q≤Q-1，K为幅度非线性失真最大阶数，Q为相位非线性失真最大阶数，1≤K≤6，1≤Q≤6；
记本地信道非线性响应的反向曲线为B(n)＝f(A(n))，步骤3中根据数字信号和预均衡数据计算获得预均衡系数为公式(1)：
Figure PCTCN2022077869-appb-000012
将公式(1)展开为公式(2)：
Figure PCTCN2022077869-appb-000013
将公式(2)合并为公式(3)：
Figure PCTCN2022077869-appb-000014
其中，矩阵M为由数字信号
Figure PCTCN2022077869-appb-000015
根据公式(2)构成的矩阵，大小为(N-Q)*(K*Q)；
变换公式(3)，得到公式(4)：
Figure PCTCN2022077869-appb-000016
根据公式(4)求解获得预均衡系数a kq。
第二实施例中，步骤3中非线性预均衡系数计算模块每隔时间T计算一次预均衡系数a kq，T≤1分钟；步骤4中非线性预均衡实现模块根据预均衡系数a kq更新非线性预均衡响应，记步骤1中所述G3-PLC基带数据为
Figure PCTCN2022077869-appb-000017
所述非线性预均衡响应为公式(5)：
Figure PCTCN2022077869-appb-000018
第二实施例中，所述预均衡数据和数字信号的样本个数N取值为2048，幅度非线性失真最大阶数K取值为5，相位非线性失真最大阶数Q取值为4。
本发明提供了一种G3-PLC电力载波线系统的非线性预均衡装置和方法，具体实 现该技术方案的方法和途径很多，以上所述仅是本发明的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。本实施例中未明确的各组成部分均可用现有技术加以实现。

Claims (10)

  1. 一种G3-PLC电力载波线系统的非线性预均衡装置，其特征在于，应用于G3-PLC电力载波线系统的发射端，包括G3-PLC基带数据模块、非线性预均衡实现模块、DA数模转换模块、本地信道非线性响应模块、AD模数转换模块和非线性预均衡系数计算模块，
    所述G3-PLC基带数据模块，用于产生G3-PLC基带数据，并将所述G3-PLC基带数据发送至非线性预均衡实现模块；
    所述非线性预均衡实现模块，用于对G3-PLC基带数据进行非线性预均衡，获得预均衡数据，并将所述预均衡数据发送至DA数模转换模块和非线性预均衡系数计算模块；非线性预均衡实现模块的非线性预均衡响应能够预先抵消本地信道非线性响应模块产生的非线性响应失真；
    所述DA数模转换模块，用于将预均衡数据转换为模拟信号，并将所述模拟信号发送至本地信道非线性响应模块；
    所述本地信道非线性响应模块，用于将所述模拟信号进行信号滤波、放大以及耦合至电力线，获得发射信号，并将所述发射信号发送至AD模数转换模块和G3-PLC电力载波线系统的接收端；
    所述AD模数转换模块，用于将发射信号转换为数字信号，并发送至非线性预均衡系数计算模块；
    所述非线性预均衡系数计算模块，用于根据输入的数字信号和预均衡数据计算获得预均衡系数，并将所述预均衡系数反馈至非线性预均衡实现模块，所述预均衡系数用于非线性预均衡。
  2. 根据权利要求1所述的一种G3-PLC电力载波线系统的非线性预均衡装置，其特征在于，所述本地信道非线性响应模块包括发射端模拟滤波器、线路驱动器和本地发射电力线，将所述模拟信号输入发射端模拟滤波器进行信号滤波处理，滤除信号带外杂散，获得滤波后的模拟信号；将滤波后的模拟信号输入线路驱动器进行信号放大，获得放大后的模拟信号；将放大后的模拟信号耦合至本地发射电力线，获得发射信号。
  3. 根据权利要求2所述的一种G3-PLC电力载波线系统的非线性预均衡装置，其特征在于，非线性预均衡实现模块的非线性预均衡响应与本地信道非线性响应模块的本地信道非线性响应的反向曲线相同。
  4. 根据权利要求3所述的一种G3-PLC电力载波线系统的非线性预均衡装置，其特征在于，所述本地信道非线性响应模块产生的非线性响应失真包括发射端模拟滤波器的非线性失真、线路驱动器的非线性失真和本地发射电力线负载不匹配产生的非线性失真，所述非线性失真包括幅度相位和多径的非线性失真。
  5. 一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，包括以下步骤：
    步骤1，对G3-PLC基带数据进行非线性预均衡，获得预均衡数据；
    步骤2，将预均衡数据转换为模拟信号，发送至本地信道非线性响应模块，获得发射信号；
    步骤3，将发射信号转换为数字信号，发送至非线性预均衡系数计算模块；根据数字信号和预均衡数据计算获得预均衡系数；
    步骤4，将预均衡系数反馈至非线性预均衡实现模块，获得非线性预均衡响应。
  6. 根据权利要求5所述的一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，步骤3中所述预均衡系数为非线性预均衡实现模块的非线性预均衡响应系数，根据本地信道非线性响应模块的本地信道非线性响应的反向曲线计算获得。
  7. 根据权利要求6所述的一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，步骤3中所述预均衡系数采用矩阵分解计算获得。
  8. 根据权利要求7所述的一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，记步骤1中预均衡数据为
    Figure PCTCN2022077869-appb-100001
    步骤3中数字信号为
    Figure PCTCN2022077869-appb-100002
    N为预均衡数据和数字信号的样本个数，n为样本点，1≤n≤N，记预均衡系数为a kq，k表示非线性参数，q表示多径参数，1≤k≤K，0≤q≤Q-1，K为幅度非线性失真最大阶数，Q为相位非线性失真最大阶数，1≤K≤6，1≤Q≤6；
    记本地信道非线性响应的反向曲线为B(n)＝f(A(n))，步骤3中根据数字信号和预均衡数据计算获得预均衡系数为公式(1)：
    Figure PCTCN2022077869-appb-100003
    将公式(1)展开为公式(2)：
    Figure PCTCN2022077869-appb-100004
    将公式(2)合并为公式(3)：
    Figure PCTCN2022077869-appb-100005
    其中，矩阵M为由数字信号
    Figure PCTCN2022077869-appb-100006
    根据公式(2)构成的矩阵，大小为(N-Q)*(K*Q)；
    变换公式(3)，得到公式(4)：
    Figure PCTCN2022077869-appb-100007
    根据公式(4)求解获得预均衡系数a kq。
  9. 根据权利要求8所述的一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，步骤3中非线性预均衡系数计算模块每隔时间T计算一次预均衡系数a kq，T≤1分钟；步骤4中非线性预均衡实现模块根据预均衡系数a kq更新非线性预均衡响应，记步骤1中所述G3-PLC基带数据为
    Figure PCTCN2022077869-appb-100008
    所述非线性预均衡响应为公式(5)：
    Figure PCTCN2022077869-appb-100009
  10. 根据权利要求8所述的一种G3-PLC电力载波线系统的非线性预均衡方法，其特征在于，所述预均衡数据和数字信号的样本个数N取值为2048，幅度非线性失真最大阶数K取值为5，相位非线性失真最大阶数Q取值为4。
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