Algebraic structure of F_q-linear conjucyclic codes over finite field F_q^2

07/08/2020

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by   Jingjie Lv, et al.

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Recently, Abualrub et al. illustrated the algebraic structure of additive conjucyclic codes over F_4 (Finite Fields Appl. 65 (2020) 101678). In this paper, our main objective is to generalize their theory. Via an isomorphic map, we give a canonical bijective correspondence between F_q-linear additive conjucyclic codes of length n over F_q^2 and q-ary linear cyclic codes of length 2n. By defining the alternating inner product, our proposed isomorphic map preserving the orthogonality can also be proved. From the factorization of the polynomial x^2n-1 over F_q, the enumeration of F_q-linear additive conjucyclic codes of length n over F_q^2 will be obtained. Moreover, we provide the generator and parity-check matrices of these q^2-ary additive conjucyclic codes of length n.