| 混沌CDMA系统中多址干扰分析 |
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| 引用本文： | 刘虎,张树京,刘剑波.混沌CDMA系统中多址干扰分析[J].铁道学报,2001,23(2):45-49. |
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| 作者姓名： | 刘虎 张树京 刘剑波 |
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| 作者单位： | 1. 同济大学 交通信息工程与控制研究所,
2. 上海交通大学 电子工程系, |
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| 基金项目： | 铁道部专项科研基金项目(J98Z228) |
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| 摘 要： | 以logistic混沌扩频序列为例，对混沌扩频序列的多址干扰进行了分析，在用户信号之间完全异步的条件下，采用新的估值算法，推出混沌扩频序列的误码率表达式，指出混沌扩频序列长度、用户数及误码率的关系。领导 具结果表明，在混沌扩频序列长度有限的情况下，用户数偏少时，实际的误码率比用高斯估值法计算的误码率略大一些。
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| 关 键 词： | 混沌扩频 多址干扰 ermite多项式 误码率 通信系统 |
| 文章编号： | 1001-8360(2001)02-0045-05 |
Analysis of MAI for chaotic CDMA system |
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| LIU Hu,ZHANG Shu-jing,LIU Jian-bo.Analysis of MAI for chaotic CDMA system[J].Journal of the China railway Society,2001,23(2):45-49. |
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| Authors: | LIU Hu ZHANG Shu-jing LIU Jian-bo |
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| Abstract: | As logistic-map chaotic spread spectrum sequences, the MAI of chaotic spread spectrum sequences has been analyzed. Under the condition of synchronization among the signal of users, the BER is deduced by a new estimation algorithm, and the relationships between BER and the length of chaotic spread spectrum sequences or number of users are pointed out also. Simulation shows that if the length of chaotic spread spectrum is limited and the number of users is small, the practical BER is slightly bigger than the BER, which is calculated through Gauss approximation. |
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| Keywords: | chaotic spread spectrum MAI (Multiple Access Interference) Hermite polynomial BER (Bit Error Rate) |
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