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Design of perfect reconstruction FIR filter banks using DFT-modulation

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3 Author(s)
Tsutsui, S. ; Fac. of Sci. & Technol., Keio Univ., Japan ; Nagai, Takayuki ; Ikehara, M.

In this paper, we present a design method of perfect reconstruction (PR) FIR filter banks by discrete Fourier transform modulation (DFT-modulation). In a previous work, the implementation of cosine-modulated PR filter banks was shown to be easy to design and capable of fast processing. But this method is a little bit inconvenient because of its restriction on the filter length. In our new approach filter banks are implemented by DFT-modulation of a prototype filter with complex coefficients and this has some advantages over the previous work. Furthermore, we propose a optimization method using the Lagrange-Newton method. Finally, we give a design example and show this method to be effective

Published in:

Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on  (Volume:2 )

Date of Conference:

12-15 May 1996