Construction of Shift Distinct Sequence Sets with Lowor ZeroCorrelation Zone Based on Interleaving Technique
Construction of Shift Distinct Sequence Sets with Lowor ZeroCorrelation Zone Based on Interleaving Technique
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发表时间：
2013
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通讯作者：
Cheng-qian Xu
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作者：
Cheng-qian Xu
提出了两种新的移位序列构造，并计算了移位不同序列集的上界。提出了初始点和初始距离的概念。CBIID任意选择初始点，通过设计合适的初始距离得到多个不同的移位序列集。利用交错技术可以得到多移明显的低相关区或零相关区（LCZ/ZCZ）序列集。该方法灵活地选取了初始点，是对现有方法的扩展。CBVID是在CBIID的基础上，根据移位序列集中不同的初始距离来设计移位序列。与以往的结构相比，它可以为准同步码分多址（QS-CDMA）系统获得更多的扩频序列。将不同的LCZ/ZCZ序列集分配给不同的单元，以减少干扰。
Two new constructions of shift sequence are proposed and the upper bound of the shift distinct sequence sets is computed.The concepts of initial point and initial distance are presented.CBIID selects initial point arbitrarily and multiple distinct shift sequence sets are obtained by designing suitable initial distance.By utilizing interleaving technique one can get multiple shift distinct low-correlation zone or zero-correlation zone(LCZ/ZCZ)sequence sets.The initial point is selected flexibly,so it is the expansion of the existing methods.CBVID,which is based on CBIID,designs shift sequence based on different initial distance in a shift sequence set.It can gain more spread-spectrum sequences for quasi-synchronous code-division multiple-access(QS-CDMA)system compared with previous constructions.Shift distinct LCZ/ZCZ sequence sets are allocated to different cells to reduce interference.