具有较大零相关窗补序列集的构造

Constructions of Zero-Correlation Zone Complementary Sequence Sets with Large Cardinality

为了降低甚至消除近似同步码分多址(Approximately-synchronized code-division multiple-access,AS-CDMA)系统的多径干扰和多址干扰(Multiple access interference,MAI),满足系统不断增大的用户容量需要,提出了零相关窗补序列集和零相关窗补序列集的构造方法。零相关窗补序列集比传统补序列集具有更多的序列数目,应用到通信系统中可以支持更多的通信用户。本文基于完美序列和行正交矩阵,构造了两类具有较大零相关窗补序列集:第一类是运用完美序列的自相关性质和行正交矩阵的正交性构造了一类最优的零相关窗补序列集;第二类以同样的方式,构造了一类几乎最优的零相关窗补序列集。

In order to reduce or eliminate multipath interference and multiple access interference （MAI） of the approximately-synchronized code-division multiple-access （AS-CDMA） system,and satisfy the needs of increasing user capacities of the system,constructions of zero-correlation zone complementary sequence sets are proposed.Zero-correlation zone complementary sequence sets have larger size compared with conventional ones and can support more users in communication systems.Based on perfect sequences and row-orthogonal matrices,two zero-correlation zone complementary sequence sets are constructed with large cardinality.The first one is an optimal zero-correlation zone complementary sequence sets and constructed by using the properties of perfect sequences and row-orthogonal matrices.The second one is an almost optimal zero-correlation zone complementary sequence sets and constructed by using the same method.