| Analysis of PR and near-PR cosine-modulated filter banks with odd and even numbers of channels |
| |
| 作者姓名： | XIE Xuemei ZHONG Wei SHI Guangming |
| |
| 作者单位： | School of Electronic Engineering, Xidian University, Xi’an 710071, China |
| |
| 基金项目： | 国家自然科学基金;国家自然科学基金 |
| |
| 摘 要： | It is well known that M-channel filter banks, satisfying either the perfect-reconstruction (PR) or near-PR property, can be obtained by cosine modulation of a linear-phase prototype filter. In this work, we investigated the effects of choosing odd or even number of channels on the performance of both PR and near-PR cosine-modulated filter banks (CMFBs). Given the same m, a performance degradation happens in the PR case with odd numbered M. Contrarily, the choice of even or odd M has little effects on the whole system quality for near-PR one. In addition, we made some comparisons between the constrained optimization and the Parks-McClellan algorithm with cosine roll-off characteristic in designing near-PR CMFBs. Detailed analyses and numerical comparisons show that the PR and near-PR systems have their individual characteristics in terms of M and m selection. Studies here can provide useful and practical guidelines for choosing right filter systems.
|
| 关 键 词： | cosine modulated filter banks perfect reconstruction (PR) the Parks-McClellan algorithm |
Analysis of PR and near-PR cosine-modulated filter banks with odd and even numbers of channels |
| |
| XIE Xuemei,ZHONG Wei,SHI Guangming.Analysis of PR and near-PR cosine-modulated filter banks with odd and even numbers of channels[J].Progress in Natural Science,2006,16(11):1198-1204. |
| |
| Authors: | XIE Xuemei ZHONG Wei SHI Guangming |
| |
| Abstract: | It is well known that M-channel filter banks, satisfying either the perfect-reconstruction (PR) or near-PR property, can be obtained by cosine modulation of a linear-phase prototype filter. In this work, we investigated the effects of choosing odd or even number of channels on the performance of both PR and near-PR cosine-modulated filter banks (CMFBs). Given the same m, a performance degradation happens in the PR case with odd numbered M. Contrarily, the choice of even or odd M has little effects on the whole system quality for near-PR one. In addition, we made some comparisons between the constrained optimization and the Parks-McClellan algorithm with cosine roll-off characteristic in designing near-PR CMFBs. Detailed analyses and numerical comparisons show that the PR and near-PR systems have their individual characteristics in terms of M and m selection. Studies here can provide useful and practical guidelines for choosing right filter systems. |
| |
| Keywords: | cosine modulated filter banks perfect reconstruction (PR) the Parks-McClellan algorithm |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 |
