| 基于混沌扩频CDMA的伽利略卫星定位系统编码技术 |
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| 引用本文： | 陈 朝,汤天浩. 基于混沌扩频CDMA的伽利略卫星定位系统编码技术[J]. 太赫兹科学与电子信息学报, 2010, 8(2): 128-133 |
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| 作者姓名： | 陈 朝 汤天浩 |
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| 作者单位： | 1. 上海海事大学,中法联合伽利略系统与海上安全智能交通研究所,上海,200135;中国地质大学,机械与电子信息学院,湖北,武汉,430074
2. 上海海事大学,中法联合伽利略系统与海上安全智能交通研究所,上海,200135 |
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| 基金项目： | 上海市教委科研资助项目 |
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| 摘 要： | 在伽利略系统中编码技术日益重要。文章在将混沌扩频技术应用到伽利略系统中后，对系统的信道特性进行了探讨，特别是利用混沌扩频的优秀随机性和正交性对系统进行了信道仿真。仿真结果表明信道衰减小于-40 dB，满足CDMA2000协议规范，从而简化了传统CDMA系统PN码产生的复杂性，统一了信号源和信道编码的混沌序列的使用。这种将混沌扩频CDMA技术代替传统PN序列的方法在伽利略系统中的应用具有实用性和可行性。
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| 关 键 词： | 伽利略系统 混沌扩频 CDMA2000技术 |
| 收稿时间： | 2009-09-28 |
| 修稿时间： | 2009-12-27 |
Coding technology in Galileo system based on chaotic spreading spectrum CDMA |
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| CHEN Zhao and TANG Tian-hao. Coding technology in Galileo system based on chaotic spreading spectrum CDMA[J]. Journal of Terahertz Science and Electronic Information Technology, 2010, 8(2): 128-133 |
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| Authors: | CHEN Zhao and TANG Tian-hao |
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| Affiliation: | CHEN Zhao1,2,TANG Tian-hao1 (1.Sino-French Joint Research Institute on Galileo-Maritime ITS for Safer Seas,Shanghai maritime university,Shanghai 200135,China,2.Faculty of Mechanical & Technology,China University of Geosciences,Wuhan Hubei 430074,China) |
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| Abstract: | The coding technology in Galileo system is more and more important. In this study, the spreading-spectrum technology was applied to Galileo system; the channel characteristics were discussed and simulated with the excellent stochastic and orthogonal performances. Simulation results indicated that the attenuation of channel was less than -40 dB, which had reached the specification of CDMA2000, thereby, it had simplified the complexity of Pseudo-Noise(PN) code generation, and had unified the usage of chaos se... |
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| Keywords: | Galileo system chaotic spreading-spectrum CDMA2000 |
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