Polyphase zero correlation zone sequences from generalised bent functions
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Sequence families with zero correlation zone (ZCZ) have been extensively studied in recent years due to their important applications in quasi-synchronous code-division multiple-access (QS-CDMA) systems. To accommodate multiuser environments, multiple ZCZ sequence sets with low inter-set cross-correlation are expected. In this paper, we propose a construction of polyphase ZCZ sequences based on generalised bent functions. Moreover, multiple polyphase ZCZ sequence sets with good inter-set cross-correlation are presented. Each generated ZCZ sequence set is optimal with respect to the Tang-Fan-Matsufuji bound.
KeywordsQuasi-synchronous code-division multiple-access (QS-CDMA) Zero correlation zone (ZCZ) Sequences Perfect autocorrelation Orthogonal sequences
Mathematics Subject Classification (2010)11B50 94A55
The authors gratefully acknowledge constructive criticisms by the anonymous reviewers and valuable comments from the SETA conference. In addition, the authors specially thank prof. Zhengchun Zhou for his invaluable discussions on this topic and Nikolay Stoyanov Kaleyski for his grammar correction.
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