A polyphase and FFT realization of modulation sub-band adaptive filter with minimum sampling rate

Author

Nakayama, K. ; Hirano, A. ; Sakaguchi, H.

Author_Institution

Dept. of Electr. & Comput. Eng., Kanazawa Univ., Japan

Volume

3

fYear

1999

fDate

15-19 Mar 1999

Firstpage

1485

Abstract

In this paper, a polyphase and FFT realization of a sub-band adaptive filter is proposed. In the polyphase and FFT realization for the transmultiplexer, the sampling rate reduction is the same as the number of the sub-bands. In the proposed method, however, they are different, so the conventional method cannot be applied. In the new realization, the polyphase filters are divided into a tapped delay line and an FFT part so as to be shared by all the sub-bands. Computational complexity is well reduced compared with the direct realization

Keywords

adaptive filters; channel bank filters; computational complexity; fast Fourier transforms; filtering theory; modulation; signal sampling; FFT realization; computational complexity; minimum sampling rate; modulation; polyphase filters; polyphase realization; sub-band adaptive filter; tapped delay line; Adaptive filters; Bandwidth; Computational complexity; Convergence; Delay lines; Demodulation; Filter bank; Sampling methods; Signal analysis; Signal synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.756264

Filename

756264