Characterization of RNS multiply-add units for power efficient DSP

Gian Carlo Cardarilli, Alberto Nannarelli, Massimo Petricca, Marco Re

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


In the past decades, the Residue Number System (RNS) has been adopted in DSP as an alternative to the traditional two's complement number system (TCS) because of the savings in area, higher speed and reduced power dissipation. In this work, we perform a comprehensive Design Space Exploration (DSE) for a fused multiply-add unit by taking into account four metrics: area, delay, power consumption, and switching activity. The results of the DSE are verified against the TCS and RNS implementation of parallel FIR filters of different characteristics. In both the DSE and the filter implementation, we consider two design corners: maximum speed and minimum area. The experimental results demonstrate that for high data rates and high order filters, the RNS implementation is more power efficient than the TCS because of the reduced switching activity and the larger amount of low-power cells placed in the unit.
Original languageEnglish
Title of host publicationConference Proceedings of the 58th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS 2015) : “Climbing to New Heights”
Number of pages4
Publication date2015
ISBN (Print)978-1-4673-6557-4
Publication statusPublished - 2015
EventIEEE 58th International Midwest Symposium on Circuits and Systems - Fort Collins, United States
Duration: 2 Aug 20155 Aug 2015
Conference number: 58


ConferenceIEEE 58th International Midwest Symposium on Circuits and Systems
CountryUnited States
CityFort Collins
Internet address

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