电子器件2024，Vol.47Issue(2)：442-447,6.DOI:10.3969/j.issn.1005-9490.2024.02.023
基于窄带频谱分析的电力线载波通信干扰过滤技术
Interference Filtering Technology of Power Line Carrier Communication Based on Narrowband Spectrum Analysis
摘要
Abstract
Power line carrier communication is affected by background noise,impulse noise and other aspects of interference factors,re-sulting in degradation of communication signal quality,for which a communication interference filtering technique based on narrowband spectrum analysis is proposed.Firstly,an approximate model is constructed to analyze the communication signal characteristics,and Markov chain is used to simulate the impulse noise state on the channel.Then based on the narrowband spectrum analysis algorithm,the direct spectrum is separated using orthogonal data windows under the signal spectrum periodogram,and the variance is screened to avoid the occurrence of spectrum leakage events.The Fourier transform is used to calculate the characteristic spectrum,estimate the concen-tration characteristics of the signal energy,analyze the communication signal,and balance the signal amplitude and interference suppres-sion.Finally,interference filtering is implemented through time-frequency peaks to effectively ensure the quality of power line carrier communication signals.After the experimental data analysis,it is proved that the minimum value of carrier interference amplitude of the proposed technique is 1.1 dB,the average value of carrier communication signal BER is 1.9%,and the average value of method time consumption is 3.8 s.关键词
电力线载波/信号抗干扰/频谱感知/傅里叶变换/窄带频谱分析Key words
power line carriers/signal immunity/spectrum sensing/Fourier transform/narrowband spectrum analysis分类
信息技术与安全科学引用本文复制引用
李俊,唐智灵..基于窄带频谱分析的电力线载波通信干扰过滤技术[J].电子器件,2024,47(2):442-447,6.基金项目
广西自然科学基金项目(2021GXNSFAA220010) （2021GXNSFAA220010）
