一种改进的LMS自适应低压电力线通信信道估计方法  

Improved LMS adaptive channel estimation algorithm for OFDM system in low-voltage power line communication

作　　者：谢志远[1] 马英红[1] 郭以贺[1] 

机构地区：[1]华北电力大学电子与信息工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2006年第5期68-71,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：在分析了低压电力线信道特性的基础上,对OFDM低压电力线通信中的LMS自适应信道估计算法进行了研究。基于低压电力线的多径传输特性和慢时变特性,提出了一种改进算法,该算法利用低压电力线的多径传输特性实现了对LMS算法更新步长的调整。在OFDM低压电力线通信信道下对该算法进行仿真,结果表明该算法对低压电力线信道具有更好的估计性能。The properties of low-voltage power line channel are analyzed, The LMS adaptive channel estimation algorithm for OFDM system in low-voltage power line communication is studied. An improved algorithm is proposed based on the multi-path transmission and slow time-variant properties of low-voltage power line. The renew-step length is modified by using multi-path transmission property of low-voltage power line. It is simulated in OFDM system in low-voltage power line. The results indicate that this algorithm is effective.

关 键 词：信道估计 LMS OFDM 

分 类 号：TM73[电气工程—电力系统及自动化] TN913.6[电子电信—通信与信息系统]