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时频域非参数密度估计的独立成分分析 被引量:1

Independent Component Analysis Based on Nonparametric Density Estimation on time-frequency Domain
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摘要 这篇文章提出了一种新的时频域非参数密度估计独立成分分析,考虑到含噪的情况将小波包系数阈值降噪作为其预处理过程,该种算法实现非平稳信号过定瞬时混合的盲分离,它同时估计了解混合矩阵以及未知时频域内的密度函数,其最大优点是不需要选择时频点或者是划分时频面,目前对于实际信号时频盲处理方法来说,选择有效的时频点以及进行合理的时频面划分是有很大局限性的.如仿真所示,其在相同的信噪比特别是低信噪比下分离效果要优于某些时频算法.
出处 《信号处理》 CSCD 北大核心 2005年第z1期98-101,共4页 Journal of Signal Processing
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参考文献17

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