| 基于完全伸展映射混沌二值序列的设计 |
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| 引用本文： | 傅兴华,王玫.基于完全伸展映射混沌二值序列的设计[J].桂林电子科技大学学报,2007,27(1):6-9. |
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| 作者姓名： | 傅兴华 王玫 |
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| 作者单位： | 桂林电子科技大学,信息与通信学院,广西,桂林,541004 |
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| 摘 要： | 混沌序列具有相关性好、数目众多等特点,很适合作为DS-CDMA系统中的扩频码.文中对基于完全伸展的分段线性映射进行了设计,得到了自相关函数为符号交替、负指数衰减的混沌二值序列,理论分析表明该序列相对于独立同分布的纯随机序列可以提高15.5%的系统容量.在mathb中将这种序列作为异步DS-CDMA的扩频码进行系统误码率仿真,仿真结果与理论分析一致,这种序列非常适合做扩频码.
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| 关 键 词： | 最优扩频序列 码分多址(CDMA) 分段线性映射 |
| 文章编号： | 1673-808X（2007）01-0006-04 |
| 修稿时间： | 2006-12-06 |
Designing of chaotic binary spreading sequences based-on fully stretching piecewise-linear maps |
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| FU Xing-hua,WANG Mei.Designing of chaotic binary spreading sequences based-on fully stretching piecewise-linear maps[J].Journal of Guilin Institute of Electronic Technology,2007,27(1):6-9. |
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| Authors: | FU Xing-hua WANG Mei |
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| Affiliation: | School of Information and Communication Engineering, Guilin University of Electronic Technology, Guilin 541004, China |
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| Abstract: | Chaotic spreading sequences have good performance of auto-correlation,which make the ideal candidates of spreading sequences for asynchronous DS-CDMA systems.A discussion of the design of chaotic binary sequences based on fully stretching piecewise-linear maps is presented.Study results showed that the capacity of these sequences with alternating signs and exponentially decaying auto-correlation is bigger than that of Random sequence by 15.5%.The result of simulation of DS-CDMA using the designed sequences is in tandem with the theoretical analysis.It is shown that the designed sequence is suitable to be spreading sequence. |
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| Keywords: | optimal spreading sequences code division multiple access(CDMA) piecewise-linear maps |
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