基于窄带PLC自由通信的信道噪声消除算法  

Channel Noise Elimination Algorithm Based on Free Communication of Narrowband PLC

作　　者：陈斐[1] 赵强 CHEN Fei;ZHAO Qiang(Shaanxi Energy Institute,Continuing Education College,Xianyang 712000 China;Petrochina Changoing Oilfield Company,Xi'an 710000 China)

机构地区：[1]陕西能源职业技术学院,继续教育学院,陕西咸阳712000 [2]中国石油长庆油田分公司第一采气厂,陕西西安710000

出　　处：《自动化技术与应用》2021年第9期61-65,共5页Techniques of Automation and Applications

摘　　要：为了克服信道内噪声问题,本文提出一种基于窄带PLC自由通信的信道噪声消除算法,以PLC通信公共领域为参考,构建经过粗略估算的自由通信信道响应简单模型,分析信息通信特征,通过计算平均信道增益、信噪比以及码间干扰测量信道频率,检测突发传输方式信道上是否增加了新数据,以此检测噪声信息。通过信道均衡滤波器完成信道均衡,以此为基础,忽略白噪声干扰影响,只消除码间干扰以及带宽噪声干扰,实现PLC自由通信信道噪声清除。经过实验证明:在自由通信信道没有处于理想噪声消除状态时,可以应用本次设计再次滤波消除噪声,提升信号能量,达到满意的信道噪声消除结果。In order to overcome the problem of channel noise,this paper proposes a channel noise elimination algorithm based on narrow-band PLC free communication.Taking PLC communication public domain as a reference,a simple model of free communication channel response after rough estimation is constructed,and the information communication characteristics are analyzed.The channel frequency is measured by calculating the average channel gain,signal-to-noise ratio and inter symbol interference,and the burst transmission mode signal is detected whether new data is added to the trace to detect noise information.The channel equalization is completed by the channel equalization filter.On this basis,the white noise interference is ignored and the inter symbol interference and bandwidth noise interference are only eliminated,so as to realize the channel noise elimination of PLC free communication.Experiments show that:when the free communication channel is not in the ideal state of noise elimination,this design can be used to eliminate noise again,improve signal energy,and achieve satisfactory channel noise elimination results.

关 键 词：窄带PLC 通信信道 噪声清除 信噪比 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]