A low area FIR filter for FPGA implementation

Abstract

This paper proposes a high speed and low area architecture for the implementation of a FIR (Finite Impulse Response) filter into a Field Programmable Gate Array (FPGA) device. The new FIR filter type is implemented with no multiplication block, using only adders and shifting registers. This is possible because a coefficient approximation is performed, using an algorithm that computes the coefficients like a sum-of-power-of-two terms.