一种新的DBL-CDMA扩频码  

New kind of DBL-CDMA spreading codes

作　　者：杨星[1] 余政[1] 李道本[1] 邓双成[2] 

机构地区：[1]北京邮电大学信息工程学院,北京100876 [2]西安电子科技大学ISN实验室,西安710071

出　　处：《北京航空航天大学学报》2008年第10期1126-1129,1134,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(90604035)

摘　　要：构造了特殊的复数扩展矩阵,将基本松同步码(LS,Loose Synchronous)和复数扩展矩阵进行克罗内克积,设计出一种道本实验室码分多址(DBL-CDMA,Dan Ben Lab CodeDivision Multiple Access)互补分组地址码.分析了该地址码的自相关和互相关特性,以及该地址码的实现方法.分析结果表明,相对于基本LS码,在和基本LS码码长一致下,DBL-CDMA互补地址码增加了零相关窗口宽度、可用的码字数量和理想互补码的个数.该地址组码码字的自相关和组内码字间的互相关值仅在几个时间偏移处有附峰.理论推导与仿真结果相符.A new class of dao ben lab code division muhiple access （DBL-CDMA） spreading codes with zero correlation window （ZCW） was presented, which is constructed by making kronecker product of basic loose synchronous （LS） codes and special complex matrix which is constructed by Barker sequence and its phase rotation. The auto-correlation and cross-correlation function of these new codes were analyzed and some basic theorems and corollaries on these new codes were proved. In addition, the realization methods of these new codes were also discussed. Compared with the basic LS codes, the new DBL-CDMA access codes extend the minimum ZCW, increase the number of available access codes and the number of perfect complementary pair for a fixed code length. Moreover, only few side lobes of auto-correlation and cross-correlation function appear in few time shift axis in the same group. The computer simulation results verify the validity of the theoretical derivations.

关 键 词：道本实验室码分多址扩频码 扩频码 克罗内克积 零相关窗 

分 类 号：TN914.53[电子电信—通信与信息系统]