Variable Step-Size Blind Source Separation Algorithm with an Auxiliary Separation System

OU Shi-feng; ZHAO Xiao-hui; GAO Ying

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Variable Step-Size Blind Source Separation Algorithm with an Auxiliary Separation System

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- Variable Step-Size Blind Source Separation Algorithm with an Auxiliary Separation System
- Acta Electronica Sinica Vol. 37, Issue 7, Pages: 1588-1593(2009)
- 作者机构：
  
  1. 烟台大学光电信息科学技术学院,山东,烟台,264005
  2. 吉林大学通信工程学院信息科学实验室,吉林,长春,130012
  3. 烟台大学光电信息科学技术学院山东烟台,264005
  4. 吉林大学通信工程学院信息科学实验室吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.7
- Published：2009
- 稿件说明：
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OU Shi-feng, ZHAO Xiao-hui, GAO Ying. Variable Step-Size Blind Source Separation Algorithm with an Auxiliary Separation System[J]. Acta Electronica Sinica, 2009, 37(7): 1588-1593.
DOI：

OU Shi-feng, ZHAO Xiao-hui, GAO Ying. Variable Step-Size Blind Source Separation Algorithm with an Auxiliary Separation System[J]. Acta Electronica Sinica, 2009, 37(7): 1588-1593. DOI：

摘要

针对盲源分离算法中步长因子的自适应选取问题

本文基于分离性能指标与步长因子的对应关系

提出了一种新的变步长盲源分离算法.该算法通过结合一个受限的辅助分离系统

重新构造系统分离性能指标

并根据该指标参数呈指数趋势下降的变化规律来获取步长因子的自适应更新.平稳和非平稳环境下的仿真实验表明:相对于固定步长和新近的自适应变步长算法

本文提出的算法拥有更快的收敛速度和更小的稳态误差.

Abstract

In view of the adaptive selection of step-size factor in sequential blind source separation

a novel variable step-size algorithm is presented based on the correspondence between separating performance index and step-size.The proposed algorithm restructures the performance index by adopting an auxiliary separation system with some restriction and attains the adaptive updating rule of step-size in the light of the index descending in an exponential form.Simulation results show that the convergence and steady-state performance of the proposed method outperforms the fixed step-size and the recently proposed adaptive step-size algorithms in both stationary and non-stationary environments.

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