Required coefficient word length in floating-point and logarithmic digital filters
K. Kalliojärvi, Jaakko T. Astola · IEEE Signal Processing Letters · 1994
The effects of coefficient quantization to the response of a digital filter are studied. Easy-to-use expressions for the required coefficient word length, with which the filter response deviations are within specified bounds, are derived for filters realized with floating-point or logarithmic arithmetic. The required coefficient word lengths of floating-point and fixed-point realizations of filters are compared with simulations.>