Multiplierless perfect reconstruction modulated filter banks with sum-of-powers-of-two coefficients

被引：28

作者：

Chan, SC ^{[1
]}

Liu, W ^{[1
]}

Ho, KL ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

IEEE SIGNAL PROCESSING LETTERS | 2001年 / 8卷 / 06期

关键词：

fast implementation; modulated filter bank; multiplierless; perfect reconstruction; sum-of-powers-of-two;

D O I：

10.1109/97.923040

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes an efficient class of perfect reconstruction (PR) modulated filter banks (MFB) using sum-of-powers-of-two (SOPOT) coefficients, This is based on a modified factorization of the DCT-IV matrix and the lossless lattice structure of the prototype filter, which allows the coefficients to be represented in SOPOT form without affecting the PR condition. A genetic algorithm (GA) is then used to search for these SOPOT coefficients, Design examples show that SOPOT MFB with a good frequency characteristic can be designed with very low implementation complexity. The usefulness of the approach is demonstrated with a 16-channel design example.

引用

页码：163 / 166

页数：4

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