OFDM低压电力线通信中基于小波去噪的盲信道估计  

Blind channel estimation based on wavelet denoising for OFDM system in low-voltage power line communication

作　　者：陈燕华[1] 焦毅[2] 

机构地区：[1]重庆电力高等专科学校电力系电子通信教研室,重庆400053 [2]西安通信学院四系野战通信装备教研室,陕西西安710106

出　　处：《电力系统通信》2006年第12期58-62,共5页Telecommunications for Electric Power System

摘　　要：分析了OFDM低压电力线通信中采用盲信道估计的可行性,基于二阶矩盲信道估计算法提出一种小波去噪盲估计,这种算法利用小波变换思想,对盲算法中接收信号自相关矩阵的估计值进行消噪处理,以减小噪声干扰对信道估计的影响。通过仿真试验分析了小波去噪盲估计的性能。仿真结果表明,该方法与盲算法相比信道估计性能得到了明显的提高。In this paper, the author analyzes the feasibility of blind channel estimation used in OFDM technology in low-voltage power line. A wavelet denoising blind channel estimation is proposed based on a blind channel estimation in which second order moment is used. This algorithm utilizes wavelet transformation to eliminate the noise contained in the autocorrelation matrix of received signal estimated by blind algorithm, by which the noise interference effect on channel estimation can be decreased. The paper also analyzes the performance of the algorithm proposed by stimulation trial.

关 键 词：OFDM 低压电力线通信 盲估计 小波去噪 

分 类 号：TN913.6[电子电信—通信与信息系统] TM73[电子电信—信息与通信工程]