一种改进的稀疏信道估计算法  

An Improved Estimation Algorithm of Sparse Channel

作　　者：胡健[1] 张延华[1] 周作成[1] 

机构地区：[1]北京工业大学电子信息与控制工程学院,北京100124

出　　处：《通信技术》2009年第7期31-33,共3页Communications Technology

摘　　要：文中在匹配跟踪算法的基础上实现了一种稀疏信道估计的改进算法。该算法首先通过正交匹配跟踪得到信道非零抽头的粗略估计,并依此来设置自适应均衡器的权重系数的初始值,进行自适应的调整和校正,最终实现对实际信道冲激响应的精确逼近。这样不仅避免了对无谓零抽头的估计,而且提高了信道估计的性能。This paper describes the realization of an improved estimation algorithm of sparse channel based on match tracking algorithm. The channel nonzero taps are roughly estimated first by orthogonal matching pursuit algorithm, and then the results are used to set the initial weight coefficients of adaptive equalizer and thus to finish the adaptive adjustment and check. Finally, the exact approach to the real channel impulse response is realized. In this way, the estimation of unnecessary zero-taps is avoided while the performance of channel estimation improved.

关 键 词：稀疏信道 匹配跟踪算法 自适应控制 最小均方算法 

分 类 号：TN911.5[电子电信—通信与信息系统]