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On implementation and design of filter banks for subband adaptive systems

Weiss, Stephan and Harteneck, Moritz and Stewart, Robert (1998) On implementation and design of filter banks for subband adaptive systems. In: 1998 IEEE workshop on signal processing systems - SIPS 98. IEEE, New York, pp. 172-181. ISBN 0780349970


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We introduce a polyphase implementation and design of an oversampled K-channel generalized DFT (GDFT) filter bank, which can be employed for subband adaptive filtering, and therefore is required to have a low aliasing level in the subband signals. A polyphase structure is derived which can be factorized into a real-valued polyphase network and a GDFT modulation. For the latter, an FFT realization may be used, yielding a very inexpensive polyphase implementation for arbitrary integer decimation ratios N les;K. We also present an analysis underlining the efficiency of complex-valued subband processing. The design of the filter bank is completely based on the prototype filter and solved using a fast converging iterative least squares method, for which we give examples, The design specifications closely correspond with performance limits of subband adaptive filtering, which are underpinned by simulation results.

Item type: Book Section
ID code: 40529
Keywords: adaptive filters, adaptive systems, filter bank, process design, signal processing , implementation, design, filter banks, subband adaptive systems, 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: 24 Jul 2012 13:59
Last modified: 24 Jul 2015 05:28

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