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Pàgina inicial > Articles > Articles publicats > On Z8-linear Hadamard codes : |
Data: | 2020 |
Resum: | The Z2s -additive codes are subgroups of ℤZn2s, and can be seen as a generalization of linear codes over ℤ2 and ℤ4. A Zs-linear Hadamard code is a binary Hadamard code which is the Gray map image of a ℤs -additive code. It is known that either the rank or the dimension of the kernel can be used to give a complete classification for the ℤ4-linear Hadamard codes. However, when s > 2, the dimension of the kernel of ℤ2s-linear Hadamard codes of length 2t only provides a complete classification for some values of t and s. In this paper, the rank of these codes is computed for s=3. Moreover, it is proved that this invariant, along with the dimension of the kernel, provides a complete classification, once t ≥ 3 is fixed. In this case, the number of nonequivalent such codes is also established. |
Ajuts: | Ministerio de Economía y Competitividad TIN2016-77918-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-00463 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Rank ; Kernel ; Hadamard code ; Z2s -additive code ; Gray map ; Classification |
Publicat a: | IEEE Transactions on Information Theory, Vol. 66, issue 2 (Feb. 2020) , p. 970-982, ISSN 1557-9654 |
Postprint 15 p, 524.6 KB |