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Design of maximally decimated near-perfect-reconstruction DFT filter banks with allpass-based analysis filters

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2 Author(s)
Galijasevic, Enisa ; Inst. for Circuits & Syst. Theor., Kiel Univ., Germany ; Kliewer, J.

In this paper we address a maximally decimated IIR DFT filter bank, where all polyphase components are replaced by all pass filters. Generally a perfect reconstruction (PR) solution leads to a synthesis filter bank with unstable subband filters. As a novelty we show that by using closed form FIR phase compensation filters as polyphase components in the synthesis filter bank we obtain a stable near-PR analysis-synthesis system. Furthermore, the remaining linear and aliasing distortions only depend on the overall system delay and can be made arbitrarily small.

Published in:

Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on  (Volume:1 )

Date of Conference:

4-7 Nov. 2001