A Method to Convert Near-perfect into Perfect Reconstruction FIR Prototype Filters for Modulated Filter Banks

被引：0
|
作者：
Baltar, Leonardo G. [1 ]
Mezghani, Amine [1 ]
Nossek, Josef A. [1 ]
机构：
[1] Tech Univ Munich, Inst Circuit Theory & Signal Proc, D-80290 Munich, Germany
来源：
2011 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS) | 2011年
关键词：
D O I：
暂无
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：
In this contribution we propose a simple method of obtaining a perfect reconstruction (PR) FIR prototype filter starting from a given near-perfect reconstruction (NPR) prototype filter for complex modulated filter banks. Our method consists of two steps. First, we calculate the product of a pair of polyphase components that fulfill the PR conditions, and second, we search for spectral factors that maximize the correlation coefficients between the impulse response of the new polyphase components and of the original ones. Our preliminary numerical results show that the price to be payed to satisfy the PR conditions is some loss in the spectral characteristics.
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页码：1768 / 1771
页数：4
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