DocumentCode
812147
Title
Biased logarithmic arithmetic in FIR filters
Author
Vainio, O.
Author_Institution
Dept. of Inf. Technol., Tampere Univ. of Technol., Finland
Volume
41
Issue
10
fYear
2005
fDate
5/12/2005 12:00:00 AM
Firstpage
580
Lastpage
581
Abstract
Logarithmic arithmetic can provide advantages especially in high-speed, moderate precision computations. A drawback of the logarithmic number system is the cumbersome addition and subtraction operations, involving lookup table accesses. A biasing scheme is proposed for substantially reducing the complexity of the lookup table. The approach is effective when repeated accumulation of products is needed, as in finite impulse response (FIR) filter implementations.
Keywords
FIR filters; digital arithmetic; table lookup; FIR; addition operations; biased logarithmic arithmetic; finite impulse response filter; logarithmic number system; lookup table access; lookup table complexity; subtraction operations;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20050785
Filename
1432528
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