Hybrid multiplierless FIR filter architecture based on NEDA

Abstract

This paper presents new hybrid multiplierless finite impulse response (FIR) architecture based on New Distributed Arithmetic (NEDA). The hybrid structure is a trade off between direct form and transposed direct form that results in a reduction of the critical path and the size of the delays elements as well as the fan-out. While the multiplications involved in the hybrid structure are replaced by a butterfly adder tree. Compared with previous methods, our proposed architecture achieves an average of 20% less additions. Moreover, the design method is simple and achieves better results than previous methods.