An asymmetric ZCZ sequence set with inter-subset uncorrelated property and flexible ZCZ length

Longye Wang, Gaoyuan Zhang, Hong Wen, Xiaoli Zeng
2018 Advances in Mathematics of Communications  
In this paper, we propose a novel method for constructing new uncorrelated asymmetric zero correlation zone (UA-ZCZ) sequence sets by interleaving perfect sequences. As a type of ZCZ sequence set, an A-ZCZ sequence set consists of multiple sequence subsets. Different subsets are correlated in conventional A-ZCZ sequence set but uncorrelated in our scheme. In other words, the cross-correlation function (CCF) between two arbitrary sequences which belong to different subsets has quite a large zero
more » ... cross-correlation zone (ZCCZ). Analytical results demonstrate that the UA-ZCZ sequence set proposed herein is optimal with respect to the upper bound of ZCZ sequence set. Specifically, our scheme enables the flexible selection of ZCZ length, which makes it extremely valuable for designing spreading sequences for quasisynchronous code-division multiple-access (QS-CDMA) systems. 2010 Mathematics Subject Classification: Primary: 94A05, 94B60.
doi:10.3934/amc.2018032 fatcat:2akl4qzg2fgerjcqpvfhaly4tu