一种低功耗FIR滤波器,采用组合残数和基数2符号数表示

Andreas Lindahl, L. Bengtsson
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引用次数: 12

摘要

提出了一种结合残数(RNS)和基数2符号数(SD)表示的FIR滤波器。RNS提供了计算的并行化和SD无携带加法。模集{2/sup n/- 1,2 /sup n/, 2/sup n/+1}用于降低RNS算术单元的复杂度。所评估的滤波器具有8、12和16个分接,二进制字长在16到64位之间,并使用具有8个金属层的UMC 0.13 /spl mu/m CMOS单元库进行合成。功率、延迟和面积的比较与等效的互补设计。区域延迟和区域延迟功耗产品表明,在相同的滤波器吞吐量下,功耗和面积都可以降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A low-power FIR filter using combined residue and radix-2 signed-digit representation
This paper presents a FIR filter combining residue (RNS) and radix-2 signed digit (SD) representation. RNS offers parallelization of the computations and SD carry-free additions. The moduli set {2/sup n/-1, 2/sup n/, 2/sup n/+1} is used reducing the complexity of the RNS arithmetic units. The evaluated filters have 8, 12 and 16 taps, binary word lengths between 16 and 64 bits, and have been synthesized using a UMC 0.13 /spl mu/m CMOS cell library with 8 metal layers. Power, delay, and area comparisons are made with equivalent 2's complement designs. The area-delay and area-delay-power products shows that reduction in both power and area at the same filter throughput can be expected.
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