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ZCZ序列偶集及大容量ZCZ序列偶集的构造

DOI: 10.13190/jbupt.201005.89.xiaolp, PP. 89-93

Keywords: 近似同步码分多址,最佳序列偶,零相关区,相关积,酉矩阵

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Abstract:

为了降低甚至消除近似同步码分多址(ASCDMA)系统的多径干扰和多址干扰(MAI),满足系统不断增大的用户容量需要,提出了新的零相关区(ZCZ)序列偶集及大容量ZCZ序列偶集的构造方法.通过对最佳序列偶进行不同的移位,再与一定阶数的酉矩阵进行相关积运算,构造出了近似最优及最优2类ZCZ序列偶集;通过对已有的ZCZ序列偶集进行适当的移位再与相应的酉矩阵进行相关积运算,构造出了更大容量和更长零相关区的ZCZ序列偶集.本文方法适用于二元、三元、四相及多相情况.构造出的ZCZ序列偶集性能优良,在同步误差允许的范围内,能满足多用户ASCDMA系统的要求.

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