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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. [Proceedings Paper]

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    Abstract

    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: Proceedings Paper
    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
    Related URLs:
      Depositing user: Pure Administrator
      Date Deposited: 24 Jul 2012 14:59
      Last modified: 18 Jul 2013 03:24
      URI: http://strathprints.strath.ac.uk/id/eprint/40529

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