Analysis and fast implementation of oversampled modulated filter banks

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


Oversampled modulated filter banks (OSFBs) are popularly employed for a number of applications such as acoustic echo cancellation in order to reduce the processing complexity of a signal processing algorithm. Hence, an efficient implementation of OSFBs themselves is mandatory. In this paper, a polyphase description is used to remove redundancies in the filter operations and to factorize the OSFB into filter components depending on the prototype filter, and the modulating transform. Based on a state-space representation of this derived polyphase factorization, signal flow graphs can be obtained which permit a very simple and efficient OSFB implementation. The analysis is performed for a number of different classes of OSFBs, and a comparison to existing methods is drawn.
Original languageEnglish
Title of host publicationMathematics in signal processing V
EditorsJohn G. McWhirter, Ian K. Proudler
Place of PublicationOxford
Number of pages12
Publication statusPublished - 1 Jul 2002
Event5th International Conference on Mathematics in Signal Processing - University of Warwick, United Kingdom
Duration: 18 Dec 200020 Dec 2000

Publication series

NameInstitute of Mathematics and ITS applications conference series
PublisherClarendon Press


Conference5th International Conference on Mathematics in Signal Processing
Country/TerritoryUnited Kingdom
CityUniversity of Warwick


  • oversampled filter banks
  • filter banks
  • acoustic echo cancellation
  • fast implementation
  • analysis
  • oversampled
  • modulated filter banks


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