关于准同步CDMA系统的广义正交扩频序列

摘要

给出了一种根据等距码构造具有零相关区或低相关区扩频序列的方法,这些扩频序列能应用于近似同步CDMA系统以删除系统的多址干扰.此外,这些序列相关函数的下界改善,对于那些不能达到下界的具有零相关区的序列,给出了一种新的下界.%Based on equidistant code, a method for obtaining spreading sequences with zero correlation zone (ZCZ)or low correlation zone (LCZ) is proposed, these spreading sequences can be employed in approximatelysynchronized code division multiple access (AS-CDMA) system to eliminating multiple access interference. Inaddition, lower bounds on correlation function of such sequence set are improved, a new lower bound, for thoseZCZ sequences which don't meet lower bound, is presented.