最佳零相关区序列集构造方法的改进  

Improved Method for Constructing Optimal ZCZ Sequence Set

作　　者：王扬志[1] 许成谦[1] 李刚[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北秦皇岛066004

出　　处：《无线电通信技术》2010年第2期16-18,共3页Radio Communications Technology

基　　金：国家自然科学基金资助项目(60872061);河北省自然科学基金资助项目(F2008000855)

摘　　要：近年来准同步CDMA(QS-CDMA)系统引起了人们的广泛关注,这是因为在这种系统中应用零相关区(ZCZ)序列作为其扩频序列集,可以减小甚至消除多址干扰和多径干扰。Matsufuji、Tang和Hayashi分别研究了由最佳序列和正交矩阵构造最佳零相关区序列集的方法。改进了Hayashi的方法,利用最佳序列和一个2阶或3阶正交矩阵构造最佳零相关区序列集。该方法使用更加方便,扩大了基于最佳序列和正交矩阵构造最佳零相关区序列集的方法的适用范围。Recently,quasi-synchronous CDMA （QS-CDMA） systems have attracted a great deal of attention.In QS-CDMA systems,zero correlation zone （ZCZ） sequences are used as spreading sequences in order to eliminate the multiple access interference and multipath interference.Based on perfect sequences and orthogonal matrices,Matsufuji,Tang and Hayashi propose several methods for constructing optimal ZCZ sequence sets.In this paper,we propose a new method which is an improvement of Hayashi’s method.The method is based on perfect sequences and orthogonal matrices of size 2×2 or 3×3.These ZCZ sequence sets generated by the proposed method are optimal with respect to the theoretic bound.The proposed method can be used to construct optimal ZCZ sequence sets with wider range of available periods and width.

关 键 词：扩频序列 零相关区序列 最佳序列 正交矩阵 

分 类 号：TN911[电子电信—通信与信息系统]