多重延遲頻率域多通道演算法

A Multidelay Block Frequency Domain Algorithm for Multichannel Adaptive Filter

周右才(Yiou-Tsai Jou)

指導教授 ： 李仲溪

元智大學/工程學院/電機工程學系/碩士(2000年)

摘要

近幾年來由於多通道的適應訊號處理有許多應用，吸引了許多研究人員的注意。例如電訊/視訊會議當中的立體迴音消除、大空間內內(如汽車)噪音的控制等等。而在各種適應演算法中，由於最小平均平方(LMS)演算法的架構簡單，使其成為最廣泛使用的演算法。而多重延遲LMS (MDF)演算法，能夠快速實現LMS，並且能夠克服濾波器係數過長時造成的問題。在本論文中，我們首先對訊號分離、立體迴音消除和主動聲學噪音消除的應用作一介紹，並以MDF演算法為基準，發展出一種多通道適應演算法。

關鍵字

可適性濾波器 ； 多重延遲頻率域演算法 ； 多通道

並列摘要

Multichannel signal processing has found many applications recently. Some typical applications are multichannel acoustic echo cancellation in tele/video conferencing system, speech signal separation, and active noise control. Among many adaptive filtering algorithms, the least mean square (LMS) algorithm is most popular due to its simplicity. The multidelay block frequency domain algorithm is an efficient way to implement LMS in frequency domain. In this thesis, we introduce several applications including signal separation, stereophonic acoustic echo cancellation and active noise control. We then develop a multidelay block frequency domain algorithm for multichannel adaptive filters.

並列關鍵字

Adaptive filter ； Multidelay Block Frequency Domain Algorithm ； Multichannel

參考文獻

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