On implementation and design of filter banks for subband adaptive systems

Weiss, S. and Harteneck, M. and Stewart, R.W. (1998) On implementation and design of filter banks for subband adaptive systems. In: IEE Colloquium on Digital Filters, 1998-04-20 - 1998-04-20.

Full text not available in this repository.Request a copy from the Strathclyde author

Abstract

This paper introduces 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 highly efficient 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 under-pinned by simulation results.

ORCID iDs

Weiss, S. ORCID logoORCID: https://orcid.org/0000-0002-3486-7206, Harteneck, M. and Stewart, R.W. ORCID logoORCID: https://orcid.org/0000-0002-7779-8597;