A New Design Strategy of Sharp Cut-off FIR Filter with Powers-of-two Coefficients

Abstract

Optimal design of fixed coefficient finite wordlength linear phase FIR digital filters for custom ICs has been the focus of research during the last few decades. With the ever increasing demands for higher throughput and low power circuits, design of FIR filters with reduced hardware complexity has received serious attention day by day. This paper addresses the design problem of linear phase, sharp cut-off FIR filter with discrete coefficients. Number of simulation results has been presented in this regard so as to compare the performance of discrete coefficient filter with that of the continuous one. Supremacy of the proposed scheme over other existing works has also been established by means of a number of parameters pertaining to frequency response of the designed filter.