| | | | | | | | | Reducting Power Dissipation in Fir Filter: an Analysis | | | Full text: |  PDF (137.4KB) | | | | Source | Signal Processing: An International Journal (SPIJ) | | | Table of Contents | | | Download Complete Issue PDF(1.86MB) | | Volume: 4 Issue: 1 | | | Pages: 1-67 | | | Publication Date: March 2010 | | | ISSN (Online): 1985-2339 | | | | | | | Pages | 62 - 67 | | | Author(s) | | | | | Published Date | 07-04-2010 | | | Publisher | CSC Journals, Kuala Lumpur, Malaysia | | | ADDITIONAL INFORMATION | | Keywords Abstract References Cited by Related Articles Collaborative Colleague | | | | | | KEYWORDS: FIR, Coefficient segmentation, Steepest decent,, SPT, Power reduction | | | | | | | | | | This Manuscript is indexed in the following databases/websites:- | | | 1. Directory of Open Access Journals (DOAJ) | | 2. Scribd | | 3. PDFCAST | | 4. Docstoc | | 5. Google Scholar | | 6. refSeek | | 7. Academic Index | | 8. iSEEK | | 9. Socol@r | | | | | | | | | | 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. | | | | | | | | | | | 1 | Y. C. Lim and Sydney R Parker, "FIR Filter Design over a Discrete Powers-of-Two Coefficient Space, IEEE Trans., Vol. ASSP-31, No. 3, pp. 583-591, June 1983.
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