QIU Tianshuang   

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Language:English

Paper Publications

Title of Paper:基于源信号统计独立性的ICA方法的不确定性研究

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Date of Publication:2004-04-20

Journal:系统工程与电子技术

Included Journals:PKU、ISTIC、CSCD

Volume:26

Issue:4

Page Number:556-559

ISSN No.:1001-506X

Key Words:盲源分离;独立分量分析;不确定性;极大似然法

Abstract:3种基于源信号统计独立性的ICA方法--极大似然法、最大信息法和最小互信息法是等价的.从这3种方法的计算公式出发,分析了自然梯度算法的收敛条件,指出了ICA问题解的不确定性和近似性的根源.通过论证表明,在源信号都属于指数型的前提下,为亚高斯型和超高斯型源信号适当选择的作为评价函数的非线性函数具有很好的韧性.

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