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.
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)
关键词
正交频分复用
循环前缀
信道估计
电力线通信
OFDM
cyclic prefix
channel estimation
power line communication system
