New Short Constraint Length Convolutional Code Constructions for Selected Rational Rates

David G. Daut, James W. Modestino, Lee D. Wismer

Research output: Contribution to journalArticle

75 Scopus citations

Abstract

New short constraint length convolutional code constructions are tabulated for rates R = (n – k)/n, k = 1,2,·· ,n – 1 with n = 2,3, ·· , 8, and for constraint lengths K = 3,4,· ··, 8. These codes have been determined by iterative search based upon a criterion of optimizing the free distance profile. Specifically, these codes maximize the free distance df while minimizing the number of adversaries in the distance, or weight, spectrum. In several instances we demonstrate the superiority of these codes over previously published code constructions at the same rate and constraint length. These codes are expected to have a number of applications, including combined source-channel coding schemes as well as coding for burst or impulsive noise channels.

Original languageEnglish (US)
Pages (from-to)794-800
Number of pages7
JournalIEEE Transactions on Information Theory
Volume28
Issue number5
DOIs
StatePublished - Sep 1982

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

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