Weiss, Stephan and Harteneck, Moritz and Stewart, Robert (1998) On implementation and design of filter banks for subband adaptive systems. In: IEEE Workshop on Signal Processing Systems, 1998-10-08 - 1998-10-10, Boston, MA.
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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:||Conference or Workshop Item (Paper)|
|Keywords:||adaptive filters, adaptive systems, filter bank, process design, signal processing , 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 10:12|
|Last modified:||15 Apr 2015 10:52|
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