【作者】 李树锋； 贾志成； 葛玲； 王婧；

【机构】 天津市红桥区河北工业大学东院；

【摘要】 对于准同步系统而言,零相关区(ZCZ)序列经常被用作扩频序列,以此来消除系统中的互道干扰和减小多径干扰。本文在最近提出的利用完备序列和酉矩阵构造ZCZ序列的基础上,构造了一六相的ZCZ序列,并将构造方法进行了扩展,并对其相关特性进行了分析。结果表明,这两种序列均具有较长的零相关区, 由于改进后的序列的互相关值为零,所以,改进后的序列用在准同步CDMA系统中,能完全消除码间干扰。更多还原

【Abstract】 In quasi-synchronous code-division multiple-access (QS-CDMA) systems, zero correlation zone (ZCZ) sequences are used as the spreading sequence in order to cancel the co-channel interference and reduce the multipath interference. Based on perfect sequences and unitary matrices, this paper constructs a kind of hexa-phase ZCZ sequence and also improved the method. finally analyzes their correlation functions.The result shows that the two kinds of hexa-phase ZCZ sequences all have longer zero correlation zone and the improved sequences are much more suitable for QS-CDMA systems.更多还原