电讯技术2018，Vol.58Issue(1)：46-51,6.DOI:10.3969/j.issn.1001-893x.2018.01.009
一种改进的电力线通信系统脉冲噪声抑制方法
An Improved Impulsive Noise Suppression Method for Power Line Communication Systems
摘要
Abstract
In order to suppress the influence of impulsive noise on power line orthogonal frequency division multiplexing(OFDM) communication system,one of the most commonly used methods is to preset a blanking nonlinearity unit before the OFDM demodulator,that is,traditional blanking method.However,the performance of this method is not satisfactory because of the introduction of nonlinear distortion.For the nonlinear distortion problem introduced by traditional blanking method,an improved blanking method based on iterative elimination of nonlinear distortion is proposed.Firstly,impulsive noise detection and nulling of the received time domain OFDM signal are carried out.Then,the nonlinear distortion introduced by the time domain zero setting processing is reconstructed by using the detected symbols in the frequency domain,and the accuracy of the reconstruction is improved by iteration.Finally,the reconstructed nonlinear distortion is subtracted from the frequency domain received signal.The simulation results show that the proposed algorithm has significant performance improvement compared with the traditional blanking method,and enhances the resistance of the power line OFDM system to impulsive noise.关键词
电力线通信/正交频分复用/脉冲噪声/置零非线性/非线性失真/脉冲噪声抑制Key words
power line communication (PLC)/OFDM/impulsive noise/blanking nonlinearity/nonlinear distortion/impulsive noise suppression分类
信息技术与安全科学引用本文复制引用
申敏,李飞,张恒..一种改进的电力线通信系统脉冲噪声抑制方法[J].电讯技术,2018,58(1):46-51,6.基金项目
国家科技重大专项(2016ZX03002010-003) （2016ZX03002010-003）
