MC-CDMA系统中信号的峰均功率比  

Peak-to-Average Power Ratio of Signal in MC-CDMA System

作　　者：邵源渊[1] 杨维[1] 贾怀义[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《北京交通大学学报》2005年第5期43-46,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(60372014);东南大学移动通信国家重点实验室开放基金资助课题(A101)

摘　　要：MC-CDMA系统信号的峰均功率比远大于单载波系统.B.M.Popovic对MC-CDMA系统中的扩频码进行了分析,通过数值模拟表明,Zadoff-Chu序列具有最低的峰均功率比,是用于MC-CDMA中的最佳候选.本文通过理论推导得出选用任意长度的Zadoff-Chu序列作为MC-CDMA系统的扩频码,其峰均功率比均不超过3 dB.对长度为32的Zadoff-Chu序列扩频和Golay互补序列扩频的MC-CDMA信号进行了比较,其峰均功率比分别为3 dB和6 dB.The ratio of peak and average power in MC-CDMA system is much larger than in single carrier system. B.M. Popovic analyzed the spreading sequences for MC-CDMA system, it is shown that Zadoff-Chu sequences has the lowest PAPR, and is a promising candidate for the selection of MC-CD- MA sequences. This paper contains a theory that using Zadoff-Chu sequences as spreading codes for MC-CDMA systems, the PAPR is upper bounded by 3dB regardless of the length of the spreading code. We also present the PAPR of Zadoff-Chu and Golay complementary sequences, 32 in length, spreading MC-CDMA, which are 3 dB and 6 dB separately.

关 键 词：多载波CDMA 峰均功率比 ZADOFF-CHU序列 

分 类 号：TN929.533[电子电信—通信与信息系统]