Weiss, Stephan and Lampe, Lutz and Stewart, Robert (1998) Efficient implementations of complex and real valued filter banks for comparative subband processing with an application to adaptive filtering. In: 1st International Symposium on Communication Systems and Digital Signal Processing, 1998-04-06 - 1998-04-08.
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In this paper, we discuss efficient methods to implement correlation type algorithms in subbands. Based on a polyphase representation, a modulated GDFT filter bank with arbitrary integer decimation ratio can be performed at minimum cost, yielding complex subband signals. Real valued subbands can be achieved by appropriate postprocessing of the complex filter bank. Algorithm specific, complex or real implementation may be better suited, for which we present criteria. For the example of subband adaptive filtering as applied in acoustic echo cancellation, we compare a number of algorithms with respect to their best implementation.
|Item type:||Conference or Workshop Item (Paper)|
|Keywords:||filter banks, subbands, acoustic echo cancellation, polyphase representation, Electrical engineering. Electronics Nuclear engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||31 Aug 2011 09:04|
|Last modified:||13 Nov 2016 09:12|