Implementing DSP functions in FPGAs

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 SRAM-based 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 bit-serial arithmetic used for compact and efficient implementation of real-time DSP applications and details the implementation of an 8-tap FIR filter