文章摘要
张刚强,童峰.基于LMS/SOLMS算法的时变多径水声信道估计方法[J].,2008,27(3):212-216
基于LMS/SOLMS算法的时变多径水声信道估计方法
Time-varying underwater acoustic multipath channel estimation based on LMS/SOLMS algorithm
  
中文摘要:
      缓变信道下基于LMS算法的信道估计算法具有较好的跟踪性能,但对快变信道,LMS算法跟踪性能下降。SOLMS算法具有比LMS算法更好的跟踪性能,尤其是在快变的信道下。但由于SOLMS算法在收敛阶段的振荡性,这时收敛速度较LMS算法慢。本文提出一种收敛模式下用LMS算法获得信道的参数,收敛后则切换成SOLMS算法跟踪信道的变化的信道估计方法。新方法结合了LMS算法收敛快和SOLMS算法跟踪性能好的优点。对时变多径水声信道估计的计算机仿真实验证明了该方法的有效性。
英文摘要:
      Channel estimation based on LMS algorithm can work well under slowly time-varying channel.In tracking fast varying channel,however it can not provide satisfactory performance.SOLMS algorithm outperforms LMS algorithm in channel tracking especially in the fast changing channel,and yet,due to the oscillation na- ture of SOLMS algorithm,SOLMS algorithm converges more slowly than LMS al- gorithm.This paper presents a novel method of channel estimation which initially u- ses LMS algorithm to acquire channel parameters in the convergence mode and then converts to SOLMS algorithm for channel tracking after convergence.This new method combines the merits of the fast convergence rate of the LMS algorithm and the better tracking performance of SOLMS algorithm.The effectiveness of this new method is verified via the computer simulation of time-varying underwater acoustic multipath channel estimation.
DOI:10.11684/j.issn.1000-310X.2008.03.009
中文关键词: 时变多径水声信道  LMS算法  二阶LMS算法  信道估计
英文关键词: Time-varying underwater acoustic multipath channel  LMS algorithm  Second-order LMS algorithm  Channel estimate
基金项目:国家自然科学基金(项目编号:10704063);福建省自然科学基金(项目编号:D0610019)资助项目
作者单位
张刚强 厦门大学水声通信与海洋信息技术教育部重点实验室,厦门,361005 
童峰 厦门大学水声通信与海洋信息技术教育部重点实验室,厦门,361005 
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