Abstract
Previous results have shown that the class of quasi-cyclic (QC) codes contains many good codes. In this paper, new rate (m-1)/pm QC codes over GF(3) and GF(4) are presented. These codes have been constructed using integer linear programming and a heuristic combinatorial optimization algorithm based on a greedy local search. Most of these codes attain the maximum possible minimum distance for any linear code with the same parameters, i.e., they are optimal, and 58 improve the maximum known distances. The generator polynomials for these 58 codes are tabulated, and the minimum distances of rate (m-1)/pm QC codes are given.
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Communicated by: R. Mullin
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Gulliver, T.A., Bhargava, V.K. New good rate (m-1)/pm ternary and quaternary quasi-cyclic codes. Des Codes Crypt 7, 223–233 (1996). https://doi.org/10.1007/BF00124513
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DOI: https://doi.org/10.1007/BF00124513