基于EMD方法的电力载波通信中的信号检测

传统的电力载波通信中的信号检测方式已不能满足对更高通信质量的要求。提出了一种采用经验模态分解检测通信信号的新方法:对采集到的一路电网电压信号进行经验模态分解,得到一组固有模态函数,比较它们与通信信号的先验知识间的互相关系数,找出相关系数最大的那个,它就是通信信号。实验结果表明:这种方法在检测电力载波通信中的通信信号是有效且可行的。

Detection of power line communication signal based on empirical mode decomposition

Traditional ways of signal detection in power line communication don't meet high quality demand.This paper presents a novel method to gain communication signals from the power line which based on empirical mode decomposition(EMD).It firstly gains a set of the intrinsic mode function(IMF) by using EMD to decompose the voltage signals which had been acquired from the power line.Secondly,it seeks the IMF which has the maximum correlative coefficient and transcendental information of communication signals.The IMF is approximate to communication signals.Simulation results reveal that the proposed the method of EMD can effectively decompose mixed signals and can precisely extract communication signals from power line communication.