| MC-CDMA系统峰平功率比分布的研究 |
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| 引用本文： | 颜彪,杨娟,薛波,李正权.MC-CDMA系统峰平功率比分布的研究[J].扬州大学学报(自然科学版),2004,7(3):50-54. |
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| 作者姓名： | 颜彪 杨娟 薛波 李正权 |
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| 作者单位： | 扬州大学信息工程学院,江苏,扬州,225009 |
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| 基金项目： | 江苏省自然科学基金资助项目(BK2001036)，江苏省教育厅留学归国人员基金资助项目 |
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| 摘 要： | 分析了MC-CDMA系统模型、MC-CDMA信号包络功率与所选用的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10位用户的MC-CDMA系统峰平功率比(PAPR)分布进行了仿真．仿真结果表明，当分别选用Walsh码、正交Gold码、Golay互补码以及Frank码作为系统扩频码时，系统PAPR的最大值约为6．如果选用Golay互补码作为扩频码，对于10位用户90％以上的信息符号序列，PAPR小于4．这些结论能够为多载波码分多址系统扩频码序列的选择提供帮助。
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| 关 键 词： | 扩频码序列 峰平功率比分布 部分自相关函数 信号包络功率 |
| 文章编号： | 1007-824X(2004)03-0050-05 |
Investigation of the PAPR distribution in MC-CDMA systems |
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| YAN BiaoYANG JuanXUE BoLI Zheng-quan.Investigation of the PAPR distribution in MC-CDMA systems[J].Journal of Yangzhou University(Natural Science Edition),2004,7(3):50-54. |
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| Authors: | YAN BiaoYANG JuanXUE BoLI Zheng-quan |
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| Abstract: | This paper analyses the MC-CDMA system model and the relation between the signal envelope power of MC-CDMA and the aperiodic autocorrelations as well as the aperiodic cross-correlations of the spreading code sequences. The simulations of the peak-average power ratio (PAPR) distribution in the MC-CDMA system with 10 users are given based on several orthogonal spreading codes sequences.The simulation results indicate that when Walsh codes, orthogonal Gold codes, Golay complementary codes and Frank codes are selected as the spreading codes of MC-CDMA system respectively, the maximal PAPR is about 6. If spreading codes are Golay complementary codes,PAPR is less than 4 for more than 90% of message symbol sequences of 10 users. These conclusions are very helpful for the choice of spreading codes in MC-CDMA system. |
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| Keywords: | spreading codes sequences peak-average power ratio distribution aperiodic autocorrelations function signal envelope power |
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