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Bounds for Binary Codes With Narrow Distance Distributions

机译:具有窄距离分布的二进制代码的界

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摘要

New lower bounds are presented on the second moment of the distance distribution of binary codes, in terms of the first moment of the distribution. These bounds are used to obtain upper bounds on the size of codes whose maximum distance is close to their minimum distance. It is then demonstrated how such bounds can be applied to bound from below the smallest attainable ratio between the maximum distance and the minimum distance of codes. Finally, counterparts of the bounds are derived for the special case of constant-weight codes.
机译:就二进制代码的距离分布的第二个矩而言,新的下界出现在二进制代码距离分布的第二个矩上。这些界限用于获得最大距离接近其最小距离的代码大小的上限。然后说明如何将这样的界限应用于最大距离和最小距离之间的最小可达到比率之下的界限。最后,对于恒权码的特殊情况,得出边界的对应项。

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