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Optimal Ternary Constant-Composition Codes of Weight Four and Distance Five

机译:权重4和距离5的最佳三元常数组成代码

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摘要

Constant-composition codes (CCCs) are a generalization of constant weight codes and permutation codes. The concept of group divisible codes, an analog of group divisible designs in combinatorial design theory, was first introduced by Chee et al. This new class of codes has been shown to be useful in recursive constructions of constant-weight codes and constant-composition codes. In this paper, we consider the problem of determining the maximal sizes of ternary constant-composition codes of weight four and distance five using group divisible codes as the main tools. We determine the exact values for these parameters. The previously known results are those with code length no greater than 10.
机译:恒定成分代码(CCC)是恒定权重代码和置换代码的概括。 Chee等人首先引入了组可分码的概念,它是组合设计理论中的组可分设计的类似物。这种新型代码已被证明在恒重代码和恒组成代码的递归构造中很有用。在本文中,我们考虑使用组可分码作为主要工具来确定权重4和距离5的三元常数组成码的最大大小的问题。我们确定这些参数的确切值。先前已知的结果是代码长度不大于10的结果。

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