| 差分混沌键控(DCSK)通信系统估值误差分析 |
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| 引用本文： | 刘虎,张树京,张莉萍. 差分混沌键控(DCSK)通信系统估值误差分析[J]. 同济大学学报(自然科学版), 2002, 30(4): 470-474 |
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| 作者姓名： | 刘虎 张树京 张莉萍 |
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| 作者单位： | 1. 同济大学沪西校区交通信息工程与控制研究所,上海,200331
2. 中国铁路通信公司甘肃省分公司兰西通信段,甘肃兰州,730050 |
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| 基金项目： | 铁道部科技发展基金资助项目 (J98Z2 2 8) |
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| 摘 要： | 在具有去噪声模块的DCSK（differential chacs shift keying）通信系统中，存在三种导致估值误差的因素，这三种因素分别来源于DCSK信号本身、加性信道噪声和去噪声模块。经过对上述三种因素的分析，提出了一种新型的DCSK通信系统，该系统使用混沌多相序列（CPS）避免DCSK信号本身带来的误差，同时采用相空间量子化的方法降低加性信道噪声的干扰。仿真结果表明，虽然这种新型的DCSK通信系统因去噪声算法带来的误差而使其噪声特性略逊于FM－DCSK，但是在CPU运算时间及系统结构上，该系统比FM－DCSK复杂性降低，易于实现。
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| 关 键 词： | 差分混沌键控 DCSK 通信系统 估值误差 |
| 文章编号： | 0253-374X(2002)04-0470-05 |
| 修稿时间： | 2001-05-09 |
Analysis of Estimation Variance in Differential Chaos Shift Keying Telecommunication Systems |
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| LIU Hu ,ZHANG Shu-jing ,ZHANG Li-ping. Analysis of Estimation Variance in Differential Chaos Shift Keying Telecommunication Systems[J]. Journal of Tongji University(Natural Science), 2002, 30(4): 470-474 |
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| Authors: | LIU Hu ZHANG Shu-jing ZHANG Li-ping |
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| Affiliation: | LIU Hu 1,ZHANG Shu-jing 1,ZHANG Li-ping 2 |
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| Abstract: | In this paper,we analyze the factors,which cause the estimation variance in a DCSK(differential chaos shift keying) telecommunication system implemented with noise decrease module.There are three main factors in this system:the DCSK signal itself,additive channel noise and the noise decrease module.To avoid the variance of DCSK signal itself and decrease that caused by additive channel noise,a novel DCSK scheme with chaotic polyphase sequence(CPS) is presented.The simulation results show that the noise performance of this novel DCSK slightly degrades in contrast to FM-DCSK for the estimation variance of the noise decrease scheme.However,this design can be implemented easily in the CPU time and system structure. |
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| Keywords: | differential chaos shift keying(DCSK) chaotic polyphase sequence(CPS) noise performance |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
