摘要
基本LS(link space code)码具有“零相关窗”(IFW)且被用于传统大区域同步码分多址系统(LAS-CDMA),但其零相关窗的分布是不均匀的.对基本LS码片用矩阵中克罗内克积方法重新排列,得到了一类新的LS码,从数学上证明了这类新码非周期自相关函数具有均匀的IFW,以及组内码字之间的IFW也是均匀分布的.码组间的非周期互相关函数具有均匀分布的IFW,或者完美理想互补的特点.计算机仿真结果验证了新码性质的正确性.
Basic link space code （LS） code has interference free window （IFW） and is used by traditional large area synchronous-code division multiple access （LAS-CDMA） system, but this IFW is not uniformly distributed. By using kronecker product of matrix theory, basic link space code chips are recombined and a new kind of LS code is obtained, It is proven mathematically that these new codes have a uniform IFW for both aperiodic auto-correlation and cross-correlation function within one group. The aperiodic cross-correlation function between groups has either uniform IFW or perfect complement. The computer simulation verifies the validity of new code.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2006年第3期103-106,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(90604035)
关键词
零相关窗
多址干扰
大区域同步码分多址系统
LS码
interference free window
multiple access interference
large area synchronous-code division multiple access
link space code
