Abstract
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 language | English |
|---|---|
| Title of host publication | Mathematics in signal processing V |
| Editors | John G. McWhirter, Ian K. Proudler |
| Place of Publication | Oxford |
| Pages | 263-274 |
| Number of pages | 12 |
| Publication status | Published - 1 Jul 2002 |
| Event | 5th International Conference on Mathematics in Signal Processing - University of Warwick, United Kingdom Duration: 18 Dec 2000 → 20 Dec 2000 |
Publication series
| Name | Institute of Mathematics and ITS applications conference series |
|---|---|
| Publisher | Clarendon Press |
| Number | 71 |
Conference
| Conference | 5th International Conference on Mathematics in Signal Processing |
|---|---|
| Country | United Kingdom |
| City | University of Warwick |
| Period | 18/12/00 → 20/12/00 |
Keywords
- oversampled filter banks
- filter banks
- acoustic echo cancellation
- fast implementation
- analysis
- oversampled
- modulated filter banks
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Cite this
Weiss, S. (2002). Analysis and fast implementation of oversampled modulated filter banks. In J. G. McWhirter, & I. K. Proudler (Eds.), Mathematics in signal processing V (pp. 263-274). (Institute of Mathematics and ITS applications conference series; No. 71). Oxford.