Self-dual codes over commutative Frobenius rings

  • Authors:
  • Steven T. Dougherty;Jon-Lark Kim;Hamid Kulosman;Hongwei Liu

  • Affiliations:
  • Department of Mathematics, University of Scranton, Scranton, PA 18510, USA;Department of Mathematics, University of Louisville, Louisville, KY 40292, USA;Department of Mathematics, University of Louisville, Louisville, KY 40292, USA;Department of Mathematics, Huazhong Normal University, Wuhan, Hubei 430079, PR China

  • Venue:
  • Finite Fields and Their Applications
  • Year:
  • 2010

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Abstract

We prove that self-dual codes exist over all finite commutative Frobenius rings, via their decomposition by the Chinese Remainder Theorem into local rings. We construct non-free self-dual codes under some conditions, using self-dual codes over finite fields, and we also construct free self-dual codes by lifting elements from the base finite field. We generalize the building-up construction for finite commutative Frobenius rings, showing that all self-dual codes with minimum weight greater than 2 can be obtained in this manner in cases where the construction applies.