Implementing DSP functions in FPGAs

Abstract

Introduction The use of SRAM-based FPGAs in digital signal processing applications is increasing. Due partly to attractive pricing as FPGAs migrate into mainstream production use, but mainly because SRAMbased FPGAs provide a flexibility that is unavailable in either DSPs or ASICs. In many signal processing applications, the ability to change parameters rapidly in response to analysis or other time-varying events is of high value. This paper describes the bitserial arithmetic used for compact and efficient implemention of realtime DSP applications and details the implementation of an 8-tap FIR filter.