MULTIPLIERLESS ARRAYS FOR REALIZATION OF LOWPASS AND HIGHPASS LINEAR-PHASE FIR DIGITAL-FILTERS

A class of type 1 linear phase FIR digital filters is proposed, The fi lter can be realized using a parallel, modular and regular array struc ture. It is shown that, under some simple constraints, the consisting modules of the array can be realized free of multiplier coefficients. Such two dimensional mesh arrays are specially suitable for realizatio n with special-purpose systolic hardware for high-speed digital signal processing tasks. Compared to the array structure, proposed by the au thors, for multiplierless realization of maximally flat FIR digital fi lters, this class needs less adders to fulfill the same magnitude resp onse requirements. Another attractive property of the proposed array i s that a number of highpass or lowpass filters with different passband widths can be realized simultaneously in a very economical way.