与提升MRD代码相关的代码和设计
Codes and Designs Related to Lifted MRD Codes
摘要:
提升最大秩距离(MRD)码,这是常数尺寸的代码,被认为是。它表明,一个解除MRD码可以表示在这样一种方式,它形成了一个块设计称为横向设计。该设计的略微不同的表示使其类似于横向设计的$q-$类似物。这些设计的结构是用来获得上界的大小的恒定尺寸的代码,其中包含一个解除MRD码。达到这些界限的代码构造。这些代码是给定参数的最大已知代码。这些横截设计也可以用来在Hamming空间中导出一类新的线性码。给出了这类码的最小距离和维数的界。
英文摘要:
Lifted maximum rank distance (MRD) codes, which are constant dimension codes, are considered. It is shown that a lifted MRD code can be represented in such a way that it forms a block design known as a transversal design. A slightly different representation of this design makes it similar to a $q-$analog of a transversal design. The structure of these designs is used to obtain upper bounds on the sizes of constant dimension codes which contain a lifted MRD code. Codes which attain these bounds are constructed. These codes are the largest known codes for the given parameters. These transversal designs can be also used to derive a new family of linear codes in the Hamming space. Bounds on the minimum distance and the dimension of such codes are given.
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