基于信道缩短的TH-PPM UWB稀疏信道盲估计算法  

New Blind Estimation Algorithm for TH-PPM UWB Sparse Channel Based on Channel Shortening

作　　者：朱行涛[1] 刘郁林[1] 蔡凯[1] 徐舜[1] 

机构地区：[1]重庆通信学院DSP实验室,重庆400035

出　　处：《数据采集与处理》2010年第5期565-568,共4页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(60672157;60672158)资助项目

摘　　要：针对TH-PPM UWB系统,提出一种基于信道缩短的UWB稀疏信道盲估计算法。该算法通过对接收信号进行信道缩短,有效地克服了信道过长给估计精度带来的影响。同时利用UWB信道的稀疏簇特性,避免了无谓的零值抽头估计,改善了该算法的性能。仿真结果表明:当信道长度大于符号长度时,该算法可以获得较好的估计性能。A novel blind estimation algorithm based on the channel shortening is proposed for TH-PPM ultra-wide-band（UWB） sparse channel.The UWB channel is shortened firstly based on the received signal,thus the impact of the long channel on the channel estimation precision is reduced.Then,the sparse cluster property of UWB channel is exploited to avoid estimating the non-important zero taps.Simulation results demonstrate that the new algorithm has good estimation performance when the length of symbol is shorter than that of the channel.

关 键 词：信道估计 超宽带 信道缩短 稀疏信道 

分 类 号：TN911.5[电子电信—通信与信息系统]