作为有限域上线性分组码象的矩阵码的提升的Grassmannian码
Grassmannian Codes as Lifts of Matrix Codes Derived as Images of Linear Block Codes over Finite Fields
摘要：
设$p$是素数，使得$p \equiv 2$或$3$ mod $5$。在赋Bachoc权的素域$GF(p)$上的$2 \times 2$矩阵的非交换矩阵环上的线性分组码被导出为赋Hamming度量的Galois域$GF(p^2)$上的线性分组码的等距像.当被视为秩度量码时，这类矩阵码满足Singleton界，因此是最大秩距离码，然后将其提升以形成一类特殊的子空间码，格拉斯曼码，满足反码界。这些所谓的反码最优格拉斯曼码以某种方式与完全图相关联。给出了这些最大秩距离码和反码最优格拉斯曼码的新例子。
英文摘要：
Let $p$ be a prime such that $p \equiv 2$ or $3$ mod $5$. Linear block codes over the non-commutative matrix ring of $2 \times 2$ matrices over the prime field $GF(p)$ endowed with the Bachoc weight are derived as isometric images of linear block codes over the Galois field $GF(p^2)$ endowed with the Hamming metric. When seen as rank metric codes, this family of matrix codes satisfies the Singleton bound and thus are maximum rank distance codes, which are then lifted to form a special class of subspace codes, the Grassmannian codes, that meet the anticode bound. These so-called anticode-optimal Grassmannian codes are associated in some way with complete graphs. New examples of these maximum rank distance codes and anticode-optimal Grassmannian codes are given.
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