| MC-CDMA系统中信号的峰均功率比 |
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| 引用本文： | 邵源渊,杨维,贾怀义.MC-CDMA系统中信号的峰均功率比[J].北京交通大学学报(自然科学版),2005,29(5):43-46. |
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| 作者姓名： | 邵源渊 杨维 贾怀义 |
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| 作者单位： | 北京交通大学,电子信息工程学院,北京,100044;北京交通大学,电子信息工程学院,北京,100044;北京交通大学,电子信息工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金
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东南大学校科研和教改项目 |
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| 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MCCDMA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.
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| 关 键 词： | 多载波CDMA 峰均功率比 Zadoff-Chu序列 |
| 文章编号： | 1673-0291(2005)05-0043-04 |
| 收稿时间： | 2005-06-13 |
| 修稿时间： | 2005年6月13日 |
Peak-to-Average Power Ratio of Signal in MC-CDMA System |
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| SHAO Yuan-yuan,YANG Wei,JIA Huai-yi.Peak-to-Average Power Ratio of Signal in MC-CDMA System[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2005,29(5):43-46. |
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| Authors: | SHAO Yuan-yuan YANG Wei JIA Huai-yi |
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| Institution: | School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | 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-CDMA 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. |
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| Keywords: | MC-CDMA peak-to-average power ratio Zadoff-Chu sequence |
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