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一类新的LS码及其构造方法
  • 期刊名称：北京邮电大学学报，vol. 29, no. 3, pp 103-106, Jun, 2007
  • 时间：0
  • 分类：TN914.53[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]北京邮电大学信息工程学院,北京100876, [2]北京邮电大学电信工程学院,北京100876
  • 相关基金：国家自然科学基金项目（90604035）
  • 相关项目：未来移动通信系统中高频谱效率的理论研究
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
中文摘要：

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.

英文摘要：

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.

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未来移动通信系统中高频谱效率的理论研究
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