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An Improvement on the Gilbert–Varshamov Bound for Permutation Codes

机译:排列码的Gilbert–Varshamov界的一种改进

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摘要

Permutation codes have been shown to be useful in power line communications, block ciphers, and multilevel flash memory models. Construction of such codes is extremely difficult. In fact, the only general lower bound known is the Gilbert–Varshamov type bound. In this paper, we establish a connection between permutation codes and independent sets in certain graphs. Using the connection, we improve the Gilbert–Varshamov bound asymptotically by a factor $log (n)$, when the code length $n$ goes to infinity.
机译:排列代码已显示在电力线通信,分组密码和多级闪存模型中很有用。构造这样的代码非常困难。实际上,唯一已知的一般下界是Gilbert–Varshamov类型界。在本文中,我们在某些图中建立置换码与独立集之间的联系。使用该连接,当代码长度长时,我们通过系数 $ log(n)$ 渐近地改善Gilbert–Varshamov界 $ n $ 变为无穷大。

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