Efficient implementations of complex and real valued filter banks for comparative subband processing with an application to adaptive filtering

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Abstract

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.
Original languageEnglish
Pages32-35
Number of pages4
Publication statusPublished - 1998
Event1st International Symposium on Communication Systems and Digital Signal Processing - Sheffield, United Kingdom
Duration: 6 Apr 19988 Apr 1998

Conference

Conference1st International Symposium on Communication Systems and Digital Signal Processing
CountryUnited Kingdom
CitySheffield
Period6/04/988/04/98

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Keywords

  • filter banks
  • subbands
  • acoustic echo cancellation
  • polyphase representation

Cite this

Weiss, S., Lampe, L., & Stewart, R. (1998). Efficient implementations of complex and real valued filter banks for comparative subband processing with an application to adaptive filtering. 32-35. Paper presented at 1st International Symposium on Communication Systems and Digital Signal Processing, Sheffield, United Kingdom.