Title :
Required coefficient word length in floating-point and logarithmic digital filters
Author :
Kalliojärvi, Kari ; Astola, Jaakko
Author_Institution :
Signal Process. Lab., Tampere Univ. of Technol., Finland
fDate :
3/1/1994 12:00:00 AM
Abstract :
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.<>
Keywords :
digital arithmetic; digital filters; filtering and prediction theory; coefficient quantization; coefficient word length; filter response deviations; floating-point digital filters; logarithmic digital filters; Digital filters; Digital signal processing; Floating-point arithmetic; Passband; Quantization; Random variables; Roundoff errors; White noise;
Journal_Title :
Signal Processing Letters, IEEE
