Power-efficient implementation of turbo decoder in SDR system

B. Kang, N. Vijaykrishnan, M. J. Irwin, T. Theocharides

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

6 Scopus citations

Abstract

Turbo coding is widely used in wireless communication. Efficient implementation of turbo codes has significant impact on the power efficiency of mobile systems. Especially, as the need for software defined radio (SDR) system is growing, the appropriate selection of DSP processors becomes an important design issue. In this work, we show that using a processor that operates using the logarithmic number system is more power efficient for executing the turbo codes than traditional fixed point and floating point processors. Further, we modify the Logarithmic Number System (LNS) processor to support less accurate addition to reduce power consumed by max*, an important operation performed during turbo decoding. Our simulation shows that this optimzation reduces the power consumption of turbo coding by 27.6% with negligible impact on the signal to noise ratio.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE International SOC Conference
EditorsJ. Chickanosky, D. Ha, R. Auletta
Pages119-122
Number of pages4
StatePublished - Dec 1 2004
EventProceedings - IEEE International SOC Conference - Santa Clara, CA, United States
Duration: Sep 12 2004Sep 15 2004

Publication series

NameProceedings - IEEE International SOC Conference

Other

OtherProceedings - IEEE International SOC Conference
CountryUnited States
CitySanta Clara, CA
Period9/12/049/15/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Kang, B., Vijaykrishnan, N., Irwin, M. J., & Theocharides, T. (2004). Power-efficient implementation of turbo decoder in SDR system. In J. Chickanosky, D. Ha, & R. Auletta (Eds.), Proceedings - IEEE International SOC Conference (pp. 119-122). [MC3.1] (Proceedings - IEEE International SOC Conference).