一种基于OFDM电力线通信系统信道估计方法  

A Scheme of Channel Estimation of OFDM Power Line Communication System

作　　者：罗清龙[1] 宋鹏[1] 李祥云[1] 

机构地区：[1]北方工业大学信息工程学院,北京100041

出　　处：《现代电子技术》2008年第7期50-52,共3页Modern Electronics Technique

基　　金：北京市教委科技发展计划(KM200610009006)

摘　　要：通过实际测量给出低压电力线的信道模型,在此基础之上提出了利用循环前缀对信道进行估计的方法,即在梳状导频模式时,使用导频获得导频子信道频率响应后,对其在频域方向进行插值得到数据子信道响应,在其后没有导频的序列的数据周期内,使用循环前缀对信道进行估计,从而起到改善系统误比特性能的目的。A scheme of channel estimation using cyclic prefix based on the measurement of the low - voltage power line channel model is presented. After obtaining the frequency response of pilot sub - channel under the state of comb - type pilot, the data sub - channel response is obtained by interpolating the frequency response in frequency direction. In the pilot - free data period,the estimation of the channel is carried out by using cyclic prefix in order to improve the performance of system error rate.

关 键 词：正交频分复用 循环前缀 信道估计 电力线通信 

分 类 号：TN911.23[电子电信—通信与信息系统]