基于扩频码序列的MC-CDMA信号包络特性  

The Envelope Character of MC-CDMA Signals Based on the Spreading Code Sequences

作　　者：颜彪[1] 许宗泽[2] 邹国良[3] 

机构地区：[1]扬州大学信息工程学院,扬州225009 [2]南京航空航天大学信息科学与技术学院,南京210016 [3]上海大学通信与信息工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2004年第6期562-565,共4页Journal of Shanghai University:Natural Science Edition

基　　金：江苏省自然科学基金资助项目 (BK2 0 0 1 0 3 6 )

摘　　要：该文分析了MC CDMA系统模型以及MC CDMA信号包络功率与扩频码序列部分自相关函数和部分互相关函数之间的关系,并基于几种正交扩频码序列对MC CDMA信号包络特性以及系统峰平功率比与用户数之间的关系特性进行了仿真.仿真结果表明,当选择正交Gold码或者Golay互补码作为MC CDMA系统的扩频码时,信号包络(单用户或多用户系统)的变化变得较小,而且系统峰平功率比基本不随用户数的变化而改变.This paper analyzes the MC-CDMA system model and the relation between the signal envelope power of MC-CDMA and the aperiodic autocorrelations and cross-correlations of the spreading code sequences. For the MC-CDMA signal envelope characteristics and the relation between the system peak-average power ratio (PAPR) and the number of users, simulations are made based on several orthogonal spreading codes sequences. The results show that when orthogonal Gold codes or Golay complementary codes are selected as the spreading codes for MC-CDMA system, the fluctuation of signal envelope (single-user or multiple-user system) is reduced and the system peak-average power ratio (almost) keeps constant as the number of users changes.

关 键 词：扩频码序列 峰平功率比 部分自相关函数 信号包络功率 

分 类 号：TN914.4[电子电信—通信与信息系统]