Optimized prototype filter based on the FRM approach for cosine-modulated filter banks

被引：24

作者：

Miguel B. Furtado

Paulo S. R. Diniz

Sergio L. Netto

机构：

[1] Programa de Engenharia Eletrica, COPPE/EPoli/UFRJ, Rio de Janeiro, RJ 21945-970

来源：

Circuits, Systems and Signal Processing | 2003年 / 22卷 / 2期

关键词：

Cosine-modulated filter banks; Filter banks; Frequency-response masking; High resolution spectrum analysis;

D O I：

10.1007/s00034-004-7026-0

中图分类号：

学科分类号：

摘要：

A design procedure for frequency-response masking (FRM) prototype filters of cosine-modulated filter banks (CMFBs) is proposed. In the given method, we perform minimization of the maximum attenuation level in the filter's stopband, subject to inter-symbol interference (ISI) and intercarrier interference (ICI) constraints. For optimization, a quasi-Newton algorithm with line search is used, and we provide simplified analytical expression to impose the interference constraints, which greatly reduce the computational complexity of the optimization procedure. The result is lower levels of ISI and ICI for a predetermined filter order, or a reduced filter complexity for given levels of interferences. It is then illustrated how the FRM-CMFB structure is suitable for implementing filter banks with a large number of bands, yielding sharp transition bands and small roll-off factors, which is an attractive feature for a wide range of practical applications.

引用

页码：193 / 210

页数：17

共 12 条

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