Reduced path viterbi decoder with inverse circuit of the encoder

Takaya Yamazato, Iwao Sasase, Shinsaku Mori, Masaaki Katayama, Akira Ogawa

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

Abstract

A reduced path Viterbi decoder with inverwe circuit of the encoder is proposed. The proposed system consists of the pre-decoder and reduced path Viterbi decoder. The pre-decoder separates the mixed channel noise from the received sequence. The number of errors in the pre-decoded error sequence is counted and the path reduction is implemented by the number of errors in pre-decoded error sequence. The path reduction is implemented as a function of channel condition because the errors in the pre-decoded error sequence can be considered as the channel error sequence. Due to the reduction of the path, the number of ACS (add compare select) operations can be reduced, which occupies the dominant part in Viterbi decoding. The ACS reduction ratio for the proposed system achieves up to 30% for the case of (2,1,2) Ungerboeck code without degradation of the error performance.

Original languageEnglish
Title of host publicationProc IEEE 1993 Pac Rim Conf Commun Comput Signal Process
PublisherPubl by IEEE
Pages569-572
Number of pages4
ISBN (Print)0780312198
Publication statusPublished - 1993 Jan 1
Externally publishedYes
EventProceedings of the IEEE 1993 Pacific Rim Conference on Communications, Computers and Signal Processing - Victoria, BC, Can
Duration: 1993 May 191993 May 21

Publication series

NameProc IEEE 1993 Pac Rim Conf Commun Comput Signal Process

Other

OtherProceedings of the IEEE 1993 Pacific Rim Conference on Communications, Computers and Signal Processing
CityVictoria, BC, Can
Period93/5/1993/5/21

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Yamazato, T., Sasase, I., Mori, S., Katayama, M., & Ogawa, A. (1993). Reduced path viterbi decoder with inverse circuit of the encoder. In Proc IEEE 1993 Pac Rim Conf Commun Comput Signal Process (pp. 569-572). (Proc IEEE 1993 Pac Rim Conf Commun Comput Signal Process). Publ by IEEE.