Complexity Reduction For FRM-based FIR Filters Using The Prefilter-Equalizer Technique

Research paper by Yong Lian

Indexed on: 01 Mar '03Published on: 01 Mar '03Published in: Circuits, Systems, and Signal Processing


A new method to reduce the number of arithmetic operations in a sharp FIR filter synthesized by the frequency-response masking (FRM) technique is presented. The success of the proposed method is based on a modified FRM approach where the subfilters in the FRM approach are implemented by using recently introduced prefilter-equalizer based filters. It is shown, by means of examples, that the proposed method yields considerable savings in the numbers of multipliers and adders compared to the original single-stage FRM approach.