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Journal of Signal Processing Systems

, Volume 85, Issue 1, pp 101–111 | Cite as

Optimization of Flexible Filter Banks Based on Fast Convolution

  • Juha Yli-KaakinenEmail author
  • Markku Renfors
Article

Abstract

Multirate filter banks can be implemented efficiently using fast-convolution (FC) processing. The main advantage of the FC filter banks (FC-FB) compared with the conventional polyphase implementations is their increased flexibility, that is, the number of channels, their bandwidths, and the center frequencies can be independently selected. In this paper, an approach to optimize the FC-FBs is proposed. First, a subband representation of the FC-FB is derived. Then, the optimization problems are formulated with the aid of the subband model. Finally, these problems are conveniently solved with the aid of a general nonlinear optimization algorithm. Several examples are included to demonstrate the proposed overall design scheme as well as to illustrate the efficiency and the flexibility of the resulting FC-FB.

Keywords

Digital filters Multirate signal processing Optimization Filter banks Sampling rate conversion 

Notes

Acknowledgments

The authors acknowledge the financial support by the European Union FP7-ICT project EMPhAtiC (http://www.ict-emphatic.eu) under grant agreement no. 318362.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Electronics and Communications EngineeringTampere University of TechnologyTampereFinland

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