M-band perfect-reconstruction linear-phase filter banks

信号处理 Pub Date : 2001-08-06 DOI:10.1109/SSP.2001.955354

X. Xie, S. Chan, T. Yuk

引用次数: 8

Abstract

This paper studies the design of M-channel perfect-reconstruction (PR) linear-phase (LP) filter banks (FBs) with M=2/sup k/ using a tree-structured FB. It is based on a observation of Fliege(1995) that the length of the analysis filters is decreased by a factor of two when the depth of the tree is increased by one, while its transition bandwidth is increased by the same factor. A lattice-based 2-channel LP FB is chosen because the frequency responses of the lowpass and highpass analysis (synthesis) filters can be designed to be closely symmetric to the other around /spl pi//2. By properly selecting the filter length, transition bandwidth. and stopband attenuation of the 2-channel PR LP FBs at each level of the tree structure, it is possible to design uniform PR LP FB with excellent frequency characteristic and much lower system delay.

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m波段完全重构线性相位滤波器组

本文研究了M=2/sup /的M通道完全重构线性相位滤波器组(FBs)的设计。根据Fliege(1995)的观察，当树的深度增加1时，分析滤波器的长度减少了2倍，而其过渡带宽增加了相同的因子。之所以选择基于晶格的2通道低电压FB，是因为低通和高通分析(合成)滤波器的频率响应可以设计成在/spl pi//2附近紧密对称。通过适当选择滤波器长度、过渡带宽。并对树状结构各层的2通道PR LP FB进行阻带衰减，从而可以设计出具有优异频率特性和更低系统延迟的均匀PR LP FB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

信号处理

自引率

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发文量

5812

期刊介绍： Journal of Signal Processing is an academic journal supervised by China Association for Science and Technology and sponsored by China Institute of Electronics. The journal is an academic journal that reflects the latest research results and technological progress in the field of signal processing and related disciplines. It covers academic papers and review articles on new theories, new ideas, and new technologies in the field of signal processing. The journal aims to provide a platform for academic exchanges for scientific researchers and engineering and technical personnel engaged in basic research and applied research in signal processing, thereby promoting the development of information science and technology. At present, the journal has been included in the three major domestic core journal databases "China Science Citation Database (CSCD), China Science and Technology Core Journals (CSTPCD), Chinese Core Journals Overview" and Coaj. It is also included in many foreign databases such as Scopus, CSA, EBSCO host, INSPEC, JST, etc.