Title :
A comparison of automatic word length optimization procedures
Author :
Cantin, M.-A. ; Savaria, Y. ; Lavoie, P.
Author_Institution :
Electr. & Comput. Eng. Dept., Ecole Polytech. de Montreal, Que., Canada
Abstract :
This paper presents a comparison of word length determination procedures. It is realized using an automated testbed that exploits a C/C++ fixed-point simulation utility to model the impact of finite word length on overall accuracy. Word length determination procedures find a combination of optimum bit resolutions by computing dissimilarities between fixed-point and floating-point simulation results. The comparison helps to select a procedure that minimizes these dissimilarities and finds an optimal combination of word lengths that meet user specified objectives, in a minimum number of iterations and hardware cost. This comparison was applied on various DSP algorithms
Keywords :
digital simulation; fixed point arithmetic; optimisation; signal processing; C/C++ fixed-point simulation; DSP algorithms; accuracy; automated testbed; automatic word length optimization; digital signal processing; dissimilarities minimization; finite word length; fixed-point simulation results; floating-point simulation results; hardware cost; optimum bit resolutions; Algorithm design and analysis; Automatic testing; Computational modeling; Cost function; Digital signal processing; Hardware; Performance analysis; Signal analysis; Signal processing algorithms; Stability;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1011427
