A new approach to FIR digital filters with fewer multipliers and reduced sensitivity

A new approach to the design of efficient finite impulse response (FIR) digital filters is presented. The essence of the proposed method is to decompose the design problem into two parts: the realization of an efficient prefilter and the design of the corresponding amplitude equalizer. It is shown that this method can provide benefits in three areas: reduced computational complexity, reduced sensitivity to coefficient quantization, and reduced roundoff noise.