Reconfigurable systolic Viterbi decoder

Kazuya Takahashi, Hiroshi Tobita, Shinnichiro Haruyama, Masao Nakagawa

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

6 Citations (Scopus)

Abstract

This paper introduces a new algorithm which saves the power consumption of the systolic Viterbi decoder. The new algorithm dynamically changes the trucated path length of a Viterbi decoder according to the channel condition, resulting in reduction of power consumption. This algorithm is based on the observation that the truncated path length and bit error rate are closely related. If we set the truncated path length short, we can reduce the size of the decoder even though the system performance is sacrificed. We propose reconfiguration of the truncated path length according to channel state. It is shown that power consumption of a systolic Viterbi decoder with convolutional code for a constraint length K = 3 and a code rate R = 1/2 can be eliminated over 20 percent at the bit error rate of 10-3 in a Rayleigh fading channel. Furthermore, the longer the truncated path length becomes, the more effective the proposed method is.

Original languageEnglish
Title of host publicationIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
Pages1629-1632
Number of pages4
Edition3
DOIs
Publication statusPublished - 1999 Dec 1
EventIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall - Amsterdam, Netherlands
Duration: 1999 Sep 191999 Sep 22

Publication series

NameIEEE Vehicular Technology Conference
Number3
Volume50
ISSN (Print)1550-2252

Other

OtherIEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
CountryNetherlands
CityAmsterdam
Period99/9/1999/9/22

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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  • Cite this

    Takahashi, K., Tobita, H., Haruyama, S., & Nakagawa, M. (1999). Reconfigurable systolic Viterbi decoder. In IEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall (3 ed., pp. 1629-1632). [801573] (IEEE Vehicular Technology Conference; Vol. 50, No. 3). https://doi.org/10.1109/VETECF.1999.801573