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《Microelectronics & Computer》 2004-12
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Logarithmic Number System

LI Wei, SHEN Xu-bang(Xi'an Microelectronics Technology Institute, Xi'an 710054 China)  
Logarithmic number system (LNS) can simplify some operations, so it can improve the efficiencies of the operations and reduce the power dissipation of the system. This paper analyses LNS in some aspects, including the representation of a number in LNS, the range and accuracy of representation and arithmetic operations in LNS. Besides these, we also discuss the conversion between LNS and the conventional representations. Then we give some suggestions which can reduce the size of the look-up table used in addition and subtraction. Finally we show the low power properties of LNS.
【Key Words】: Logarithmic number system(LNS) Look-up table Low power
【CateGory Index】: TP399
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【References】
Chinese Journal Full-text Database 1 Hits
1 Wei Kairong,Ji Lixin,Yang Zhenxi(National Digital Switch System Engineering & Technological R&D Center,Zhengzhou 450002,China);Application and FPGA implementation of polynomial fitting in log-add algorithm[J];Application of Electronic Technique;2011-02
【Co-references】
Chinese Journal Full-text Database 3 Hits
1 GE Jian-xin(Heyuan Polytechnic,Heyuan 517000,China);Digital Filter Design and Implementation Methods[J];Computer Knowledge and Technology;2009-08
2 ZHONG Guo-liang(School of Apply Science,Jiangxi University of Science & Technology,Ganzhou 34100,China);The Experience of Learning Window Function Designing FIR Digital Filter[J];Journal of Electrical & Electronic Education;2009-03
3 LI Juan (School of Computer Science and Engineering,Xinjiang Finance and Economics University,Urumqi 830012,China);Design and analysis of MATLAB under platform FIR digit filter[J];Journal of Science of Teachers' College and University;2010-03
【Secondary References】
Chinese Journal Full-text Database 2 Hits
1 LI Qiang;PENG Yi-wu;Luoding Polytechnic College;;FPGA–based System of GMM Speaker Identification[J];Journal of Guangdong Communication Polytechnic;2014-02
2 YANG Zhen-xi,ZHANG Li,NIE Zhi-liang(National Digital Switch System Engineering & Technological R & D Center,Zhengzhou 450002,China);Optimized Algorithm for Hardware Implementation Based on SVM Probability Modeling[J];Computer Engineering;2011-23
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