A new implementation of arbitrary-length cosine-modulated filter bank

Author

Gao, Xi-Qi ; He, Zhen-Ya ; Xia, Xiang-Gen

Author_Institution

Dept. of Radio Eng., Southeast Univ., Nanjing, China

Volume

3

fYear

1998

fDate

12-15 May 1998

Firstpage

1465

Abstract

In this paper, the fast implementation of cosine-modulated filter bank (CMFB) is revisited. A class of paraunitary CMFBs with arbitrary length is considered. By further reorganizing of the polyphase component matrix and using the linear-phase property of the prototype filter, we obtain a more efficient implementation structure for the CMFB, in which we use 2×2 lossless matrices instead of 2×1 ones. In the new implementation, the number of two-channel lossless lattices is reduced by a factor of two

Keywords

digital filters; filtering theory; lattice field theory; matrix algebra; 2×2 lossless matrices; arbitrary length; cosine-modulated filter bank; fast implementation; linear-phase property; paraunitary filter bank; polyphase component matrix; prototype filter; two-channel lossless lattices; Design engineering; Discrete cosine transforms; Discrete transforms; Filter bank; H infinity control; Helium; Lattices; Low pass filters; Nonlinear filters; Prototypes;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Seattle, WA

ISSN

1520-6149

Print_ISBN

0-7803-4428-6

Type

conf

DOI

10.1109/ICASSP.1998.681725

Filename

681725