Improved binary codes and sequence families from Z4-linear codes

  • Authors:
  • A. G. Shanbhag;P. Vijay Kumar;T. Hellesath

  • Affiliations:
  • Commun. Sci. Inst., Univ. of Southern California, Los Angeles, CA;-;-

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2006

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Abstract

A bound on exponential sums over Galois rings is used to construct a nested chain of Z4-linear binary codes and binary sequences. When compared with the chain of Delsarte-Goethals'(1975) codes, the codes in the new chain offer a larger minimum distance for the same code size. The binary sequence families constructed also make use of Nechaev's (1991) construction of a cyclic version of the Kerdock code. For a given value of maximum correlation, the binary sequences are shown to have a family size considerably larger than the best sequence families known