| Logistic混沌扩频序列及其在DS-CDMA系统中的性能分析 |
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| 引用本文： | 张剑,邵玉斌,徐正福,罗轶. Logistic混沌扩频序列及其在DS-CDMA系统中的性能分析[J]. 昆明理工大学学报(自然科学版), 2006, 31(2): 62-65 |
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| 作者姓名： | 张剑 邵玉斌 徐正福 罗轶 |
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| 作者单位： | 昆明理工大学,信息工程与自动化学院,云南,昆明,650051;中国联通,云南分公司,云南,昆明,650051 |
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| 摘 要： | 研究了一种混沌序列的产生方法———Logistic映射法,并对用该法产生的序列进行了自相关性,互相关性以及平衡性的分析,另外也从理论上分析了扩频序列相关性对DS-CDMA系统中多址干扰的影响.计算机仿真结果表明,在DS-CDMA系统中,与伪随机序列相比混沌扩频序列明显地降低了系统的误码率,提高了系统的性能.
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| 关 键 词： | 混沌序列 Logistic映射 多址干扰 码分多址 |
| 文章编号： | 1007-855X(2006)02-0062-04 |
| 收稿时间： | 2005-07-20 |
| 修稿时间： | 2005-07-20 |
Logistic Chaotic Spread Spectrum Sequences and Its Function Analysis in DS -CDMA System |
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| ZHANG Jian,SHAO Yu-bin,XU Zheng-fu,LUO Yi. Logistic Chaotic Spread Spectrum Sequences and Its Function Analysis in DS -CDMA System[J]. Journal of Kunming University of Science and Technology(Natural Science Edition), 2006, 31(2): 62-65 |
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| Authors: | ZHANG Jian SHAO Yu-bin XU Zheng-fu LUO Yi |
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| Affiliation: | 1. Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650051,China; 2. China Unicorn Yunnan Branch, Kunming 650051 ,China |
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| Abstract: | A kind of chaotic spread spectrum sequencesLogistic map is studied,and its sensitivity,correlation and balance are analyzed.Based on the theory,the influence of spread spectrum sequence correlation on MAI(Multiple Access Interference)for DS-CDMA communication system is discussed.The result of computer simulation shows that the DS-CDMA communication system with chaotic sequence can sharply degrade the bit error ratio(BER)and improve the performance,compared with the pseudorandom number sequence. |
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| Keywords: | chaotic sequence Logistic map multiple access interference code division multiple access |
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