Reducting Power Dissipation in Fir Filter: an Analysis

Signal Processing: An International Journal

Rakesh Kumar Bansal¹  Manoj Garg¹  Savina Bansal¹ 

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关键词: FIR;    Coefficient segmentation;    Steepest decent;    SPT;    Power reduction;   

DOI  :  

学科分类：物理（综合）

来源: Computer Science Journals

【 摘 要 】

In this paper, three existing techniques, Signed Power-of-Two (SPT), Steepest decent and Coefficient segmentation, for power reduction of FIR filters are analyzed. These techniques reduce switching activity which is directly related to the power consumption of a circuit. In an FIR filter, the multiplier consumes maximum power. Therefore, power consumption can be reduced either by by making the filter multiplier-less or by minimizing hamming distance between the coefficients of this multiplier as it directly translates into reduction in power dissipation [8]. The results obtained on four filters (LP) show that hamming distance can be reduced upto 26% and 47% in steepest decent and coefficient segmentation algorithm respectively. Multiplier-less filter can be realized by realizing coefficients in signed power-of-two terms, i.e. by shifting and adding the coefficients, though at the cost of shift operation overhead.

【 授权许可】

Unknown