Reduced precision redundancy for low-power digital filtering

Byonghyo Shim, Naresh R. Shanbhag

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)

Abstract

In this paper, we propose a low-power digital filtering technique based on voltage overscaling (VOS) and a novel algorithmic noise-tolerant (ANT) technique referred to as reduced precision redundancy (RPR). VOS implies scaling of the supply voltage beyond the critical voltage required for correct operation. RPR involves having a reduced precision replica whose output can be employed as the final output in case the original filter computes erroneously. In addition, an LSB estimator is also employed to compensate for information loss in the LSBs. For frequency selective filtering, it is shown that the proposed technique provides a 30% energy savings over an optimally scaled (i.e., the supply voltage equals the critical voltage) present day system. Energy savings of up to 65% can be achieved if a SNR loss of 1.5 dB is tolerated.

Original languageEnglish
Title of host publicationConference Record of the Asilomar Conference on Signals, Systems and Computers
EditorsM.B. Matthews
Pages148-152
Number of pages5
Volume1
Publication statusPublished - 2001
Externally publishedYes
Event35th Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: 2001 Nov 42001 Nov 7

Other

Other35th Asilomar Conference on Signals, Systems and Computers
CountryUnited States
CityPacific Grove, CA
Period01/11/401/11/7

Fingerprint

Redundancy
Electric potential
Energy conservation

ASJC Scopus subject areas

  • Hardware and Architecture
  • Signal Processing
  • Electrical and Electronic Engineering

Cite this

Shim, B., & Shanbhag, N. R. (2001). Reduced precision redundancy for low-power digital filtering. In M. B. Matthews (Ed.), Conference Record of the Asilomar Conference on Signals, Systems and Computers (Vol. 1, pp. 148-152)

Reduced precision redundancy for low-power digital filtering. / Shim, Byonghyo; Shanbhag, Naresh R.

Conference Record of the Asilomar Conference on Signals, Systems and Computers. ed. / M.B. Matthews. Vol. 1 2001. p. 148-152.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shim, B & Shanbhag, NR 2001, Reduced precision redundancy for low-power digital filtering. in MB Matthews (ed.), Conference Record of the Asilomar Conference on Signals, Systems and Computers. vol. 1, pp. 148-152, 35th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, United States, 01/11/4.
Shim B, Shanbhag NR. Reduced precision redundancy for low-power digital filtering. In Matthews MB, editor, Conference Record of the Asilomar Conference on Signals, Systems and Computers. Vol. 1. 2001. p. 148-152
Shim, Byonghyo ; Shanbhag, Naresh R. / Reduced precision redundancy for low-power digital filtering. Conference Record of the Asilomar Conference on Signals, Systems and Computers. editor / M.B. Matthews. Vol. 1 2001. pp. 148-152
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