Title :
Finite word length effects on moment of impulse response of digital filter
Author :
Khare, Ashish ; Yoshikawa, Tomoki
Author_Institution :
Dept. of Electr. & Electron. Eng., Nagaoka Univ. of Technol., Japan
Abstract :
The effect of finite word length on the moment of the impulse response of a digital filter is investigated. It is shown that the quantisation error in the moment values is almost linear with a slope of 3 dB/bit and is well related to the output roundoff noise. An algorithm is also proposed to order the cascade sections of an FIR filter with low output roundoff noise.
Keywords :
digital filters; filtering and prediction theory; roundoff errors; transient response; FIR filter; cascade sections ordering; digital filter; finite word length; impulse response; moment values; output roundoff noise; quantisation error;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920189
