| 一种混沌扩频序列的产生方法及其优选算法 |
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| 引用本文： | 余振标,冯久超.一种混沌扩频序列的产生方法及其优选算法[J].物理学报,2008,57(3):1409-1415. |
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| 作者姓名： | 余振标 冯久超 |
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| 作者单位： | 华南理工大学电子与信息学院，广州 510641 |
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| 基金项目： | 国家自然科学基金(批准号：60572025)，教育部新世纪优秀人才基金(批准号：NCET-04-0813)，教育部重点项目(批准号：105137)和广东省自然科学基金(批准号：07006496, 04205783)资助的课题. |
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| 摘 要： | 提出一种基于组合映射模型产生混沌扩频序列的方法. 根据扩频序列的特性要求和多址干扰性能指标，给出了一种混沌扩频序列的优选算法；将得到的优选序列应用于直扩码分多址系统，在不同信道条件下进行仿真，并与优选的Logistic混沌扩频序列进行性能比较，结果表明本方法产生的混沌扩频序列具有和Logistic混沌扩频序列相近的良好性能，而且保密性更好.
关键词：
码分多址
优选算法
多径信道
误码率
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| 关 键 词： | 码分多址 优选算法 多径信道 误码率 |
| 文章编号： | 1000-3290(2008)03-1409-07 |
| 收稿时间： | 2007-04-23 |
| 修稿时间： | 6/4/2007 12:00:00 AM |
A method for generating chaotic spread-spectrum sequences and their optimized selection algorithm |
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| Yu Zhen-Biao,Feng Jiu-Chao.A method for generating chaotic spread-spectrum sequences and their optimized selection algorithm[J].Acta Physica Sinica,2008,57(3):1409-1415. |
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| Authors: | Yu Zhen-Biao Feng Jiu-Chao |
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| Abstract: | A method for generating chaotic spread-spectrum sequences based on the combined chaotic map is proposed. An optimized selection algorithm based on the property requirement of spread-spectrum sequences and the performance index of multiple access interference is also presented. Simulation is performed for the optimized chaotic sequence, and an optimized logistic sequence is applied to a direct sequence spread-spectrum CDMA system under different channel conditions. The results show that the chaotic spread-spectrum sequences generated by the proposed method have similar performance as the logistic spread-spectrum sequences and have better security. |
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| Keywords: | CDMA optimized selection algorithm Rayleigh fading channel BER |
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