Abstract
In this paper, we first generalize the polycyclic codes over finite fields to polycyclic codes over the mixed alphabet \(\mathbb {Z}_2\mathbb {Z}_4\), and we show that these codes can be identified as \(\mathbb {Z}_4[x]\)-submodules of \(\mathcal {R}_{\alpha ,\beta }\) with \(\mathcal {R}_{\alpha ,\beta }=\mathbb {Z}_2[x]/\langle t_1(x)\rangle \times \mathbb {Z}_4[x]/\langle t_2(x)\rangle \), where \(t_1(x)\) and \(t_2(x)\) are monic polynomials over \(\mathbb {Z}_2\) and \(\mathbb {Z}_4\), respectively. Then we provide the generator polynomials and minimal generating sets for this family of codes based on the strong Gröbner basis. In particular, under the proper defined inner product, we study the dual of \(\mathbb {Z}_2\mathbb {Z}_4\)-additive polycyclic codes. Finally, we focus on the characterization of the \(\mathbb {Z}_2\mathbb {Z}_4\)-MDSS and MDSR codes, and as examples, we also present some (almost) optimal binary codes derived from the \(\mathbb {Z}_2\mathbb {Z}_4\)-additive polycyclic codes.
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This is one of several papers published in Designs, Codes and Cryptography comprising the “Special Issue: On Coding Theory and Combinatorics: In Memory of Vera Pless”
This research is supported by the National Natural Science Foundation of China (Grant Nos. 12071001, 61672036), the Excellent Youth Foundation of Natural Science Foundation of Anhui Province (Grant No. 1808085J20).
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Wu, R., Shi, M. On \(\mathbb {Z}_2\mathbb {Z}_4\)-additive polycyclic codes and their Gray images. Des. Codes Cryptogr. 90, 2551–2562 (2022). https://doi.org/10.1007/s10623-021-00917-0
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DOI: https://doi.org/10.1007/s10623-021-00917-0