基于指数型多延迟误差信号自相关的变步长常模算法

doi:10.3724/SP.J.1087.2013.00625

计算机应用 ›› 2013, Vol. 33 ›› Issue (03): 625-627.DOI: 10.3724/SP.J.1087.2013.00625

基于指数型多延迟误差信号自相关的变步长常模算法

张艳萍^1*,纪磊²

1.南京信息工程大学电子与信息工程学院, 南京 210044;
2.南京信息工程大学信息与控制学院, 南京 210044

收稿日期:2012-09-18 修回日期:2012-10-12 出版日期:2013-03-01 发布日期:2013-03-01
通讯作者: 张艳萍
作者简介:张艳萍(1966-),女,山西临汾人,教授,博士,主要研究方向:通信信号处理、水声信道; 纪磊(1987-),男,江苏泰州人,硕士研究生,主要研究方向:通信信号处理、水声信道。
基金资助:
江苏省自然科学基金资助项目(BK2009410)。

Variable step-size constant modulus algorithm based on exponential multi-delay error signal autocorrelation

ZHANG Yanping^1*, JI Lei²

1. School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China;
2. School of Information and Control, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China

Received:2012-09-18 Revised:2012-10-12 Online:2013-03-01 Published:2013-03-01

摘要/Abstract

摘要： 为了进一步提高指数型变步长常数模算法收敛速度,在分析误差信号自相关性的基础上,利用多延迟误差信号的自相关函数来控制步长,提出一种基于指数型多延迟误差信号自相关的变步长常模算法。该算法与无延迟及单位延迟相比,多延迟误差信号的自相关函数可以为训练轨迹提供简单且更为准确的信息,使得算法的收敛速度更快,同时使收敛过程更加平滑稳定。水声信道仿真实验进一步说明了该算法在收敛速度上的优越性。

关键词: 盲均衡, 变步长, 误差信号, 自相关函数, 水声信道

Abstract: In order to further improve the convergence speed of the exponential variable step-size constant module algorithm, a variable step-size constant module algorithm based on the exponential multi-delay error signal autocorrelation was proposed on the basis of the analysis of the error signal autocorrelation, and the multi-delay error signal autocorrelation functions were adopted to control the steps. Compared with the non-delay and unit delay, the multi-delay error signal autocorrelation of the algorithm can provide simpler and more accurate information for training trajectory, so the algorithm converges faster, and the convergence process is smoother and more stable. The underwater acoustic channel simulation experiments further verify the advantage of the algorithm in the convergence speed.

Key words: blind equalization, variable step-size, error signal, autocorrelation function, underwater acoustic channel

中图分类号:

TN911.5

张艳萍纪磊. 基于指数型多延迟误差信号自相关的变步长常模算法[J]. 计算机应用, 2013, 33(03): 625-627.

ZHANG Yanping JI Lei2. Variable step-size constant modulus algorithm based on exponential multi-delay error signal autocorrelation[J]. Journal of Computer Applications, 2013, 33(03): 625-627.

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基于指数型多延迟误差信号自相关的变步长常模算法

Variable step-size constant modulus algorithm based on exponential multi-delay error signal autocorrelation

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