On the analysis and fast implementation of oversampled modulated filter banks

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Abstract

Oversampled modulated filter banks (OSFBs) play an important role in reducing the computational cost of numerically intensive problems. The concern of this paper is an efficient implementation of the OSFB itself. The proposed method is based on a polyphase description to remove redundancies in the filter operations. Using OSFBs that are modulated from a prototyep filter, a factorisation can be obtained which depends on the filter coefficients the prototype filter and the modulating transform only. Based on a state-space representation of this polyphase factorisation, signal flow graphs can be obtained by minor modifications, which allow us a very simple and efficient implementation of OSFBs. A comparison to existing methods is drawn.
Original languageEnglish
Number of pages12
Publication statusPublished - 2000
Event5th International Conference on Mathematics in Signal Processing - University of Warwick, United Kingdom
Duration: 18 Dec 200020 Dec 2000

Conference

Conference5th International Conference on Mathematics in Signal Processing
CountryUnited Kingdom
CityUniversity of Warwick
Period18/12/0020/12/00

Keywords

  • oversampled modulated filter banks
  • filter banks
  • signal processing
  • polyphase analysis

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    Weiss, S. (2000). On the analysis and fast implementation of oversampled modulated filter banks. Paper presented at 5th International Conference on Mathematics in Signal Processing, University of Warwick, United Kingdom.