北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2006, Vol. 29 ›› Issue (3): 103-106.doi: 10.13190/jbupt.200603.103.yangx

• 研究报告 • 上一篇    下一篇

一类新的LS码及其构造方法

杨 星, 李道本, 邹永忠   

  1. 北京邮电大学 信息工程学院,北京 100876
  • 收稿日期:2005-05-24 修回日期:1900-01-01 出版日期:2006-06-30 发布日期:2006-06-30
  • 通讯作者: 杨星

A New Kind of LS Code and its Construct Method

YANG Xing, LI Dao-ben, ZOU Yong-zhong   

  1. School of Information Engineering,Beijing University of Posts and Telecommunications, BeiJing,100876 China
  • Received:2005-05-24 Revised:1900-01-01 Online:2006-06-30 Published:2006-06-30
  • Contact: YANG Xing

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)系统,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,并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。

关键词: 零相关窗, 多址干扰, 大区域同步码分多址系统, LS码

Abstract:

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. Using kronecker product of matrix theory, basic link space code chips are recombined and a new kind of LS code is obtained. These new codes have a uniform IFW for both aperiodic auto-correlation and cross-correlation function within one group, and the aperiodic cross-correlation function between groups either has uniform IFW or perfect complement. These properties are proved by both mathematics and computer simulation.

Key words: interference free window, multiple access interference, large area synchronous-code division multiple access, link space code

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