Comparative study of finite word length effects in digital filter design via the shift and delta transforms

摘要

This paper deals with the influence of the rounding of parameters represented in floating-point number systems in high-speed digital signal processing and control. It is shown that in high-performance applications, that may involve high sampling rates and/or shorter word lengths, the usual shift operator formulation is inferior to an alternative formulation based on the delta operator. The analysis is illustrated by an example.