Title :
Low roundoff noise 2-D digital filters using residue feedback
Author :
Agathoklis, P. ; Kanellakis, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
The finite wordlength fixed point realization of a 2D digital filter, using residue feedback to minimize the output roundoff noise subject to l2-scaling is considered. A new set of 2D filter invariants, called 2D residue modes, are defined which characterize the new low noise structure. There are cases where the sum of the 2D horizontal and vertical residue modes is less than the 2D horizontal and vertical second order modes and in such cases the proposed structure leads to lower roundoff noise than other techniques
Keywords :
feedback; filtering and prediction theory; minimisation; roundoff errors; two-dimensional digital filters; 2D digital filter; 2D residue modes; finite wordlength fixed point realization; horizontal residue mode; low noise structure; output roundoff noise minimization; residue feedback; second order modes; vertical residue mode; Digital filters; Electronic switching systems; Fixed-point arithmetic; Hydrogen; Noise reduction; Noise shaping; Output feedback; Quantization; State feedback; State-space methods;
Conference_Titel :
Southeastcon '94. Creative Technology Transfer - A Global Affair., Proceedings of the 1994 IEEE
Conference_Location :
Miami, FL
Print_ISBN :
0-7803-1797-1
DOI :
10.1109/SECON.1994.324255
