DESIGN OF ARBITRARY FIR LOG FILTERS BY WEIGHTED LEAST-SQUARES TECHNIQUE

被引：6

作者：

PEI, SC ^{[1
]}

SHYU, JJ ^{[1
]}

机构：

[1] TATUNG INST TECHNOL,DETP COMP SCI & ENGN,TAIPEI,TAIWAN

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1994年 / 42卷 / 09期

关键词：

D O I：

10.1109/78.317871

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 correspondence, an efficient method to design FIR filters with arbitrary log magnitude and phase responses is proposed. The method is based on an iterative weighted least squares (WLS) approach to obtain a nearly optimal approximation to the given log magnitude function in the least squares sense. The weighting function at each iteration is updated using the result of the previous iteration, which leads to an equiripple approximation in the log magnitude error. The method can be easily modified to approximate arbitrary log complex-valued frequency response, such as complex FIR log filters. Several examples are illustrated to show the effectiveness of the present approach.

引用

页码：2495 / 2498

页数：4

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