Abstract
Let \(p_1,p_2,\ldots ,p_n\) be distinct odd primes and let \(e_1,e_2,\ldots ,e_n\) be positive integers. Based on cyclotomic classes proposed by Ding and Helleseth (Finite Fields Appl 4:140–166, 1998), a binary cyclotomic sequence of period \(p_1^{e_{1}}p_{2}^{e_{2}}\ldots p_{n}^{e_n}\) is defined and denoted by \(\underline{s_\Upsilon }\). The linear complexity of \(\underline{s_\Upsilon }\) is determined and is proved to be greater than or equal to \((p_1^{e_{1}}p_{2}^{e_{2}}\ldots p_{n}^{e_n}-1)/2\). The autocorrelation function of \(\underline{s_\Upsilon }\) is explicitly computed. Let \(\ell \in \{1,2,\ldots ,n\}\). We also explicitly compute the crosscorrelation function of \(\underline{s_\Upsilon }\) and the Legendre sequence \(\underline{L_{p_\ell }}\) with respect to \(p_\ell \). It is shown that \(\underline{s_\Upsilon }\) and \(\underline{L_{p_\ell }}\) have two-level or three-level crosscorrelation, and all their two-level crosscorrelation functions are determined.
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The authors would like to express their sincere gratitude to the editor and the anonymous referees who made a number of valuable comments to improve the manuscript.
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This work was supported by the Applied Basic Research Program of the Sichuan Province, P. R. China (Grant No. 2011JY0143) and by the National Natural Science Foundation of China (Grant No. 61309034 and Grant No. 11101019).
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Wang, L., Gao, Y. Linear complexity and correlation of a class of binary cyclotomic sequences. AAECC 25, 67–97 (2014). https://doi.org/10.1007/s00200-014-0214-7
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DOI: https://doi.org/10.1007/s00200-014-0214-7