| 卫星扩频系统中的长混沌序列 |
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| 引用本文： | 陈勇,江瑾尧,程剑,赵杭生.卫星扩频系统中的长混沌序列[J].解放军理工大学学报,2004,5(4):34-38. |
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| 作者姓名： | 陈勇 江瑾尧 程剑 赵杭生 |
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| 作者单位： | 总参第63研究所,江苏,南京,210007;解放军理工大学,理学院,江苏,南京,211101;解放军理工大学,通信工程学院,江苏,南京,210007 |
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| 摘 要： | 根据单峰映射产生混沌序列极易被攻击的特点，采用高维的混沌系统来设计混沌扩频序列。针对n维非线性数字滤波器产生序列的周期和分布特性，在结构上作了相应的设计。产生序列的数值分析表明：其性能与理想随机序列一致，在系统性能上与传统扩频序列相当。由于混沌扩频序列具有周期任意、码族数目多和保密性好等优点，尤其适合在卫星扩频系统中应用。
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| 关 键 词： | 扩频 混沌 非线性数字滤波器 |
| 文章编号： | 1009-3443(2004)04-0034-05 |
| 修稿时间： | 2004年4月15日 |
Long Chaotic Sequences Using for Satellite Spreading Spectrum System |
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| CHEN Yong,JIANG Jin-yao,CHENG Jian and ZHAO Hang-sheng.Long Chaotic Sequences Using for Satellite Spreading Spectrum System[J].Journal of PLA University of Science and Technology(Natural Science Edition),2004,5(4):34-38. |
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| Authors: | CHEN Yong JIANG Jin-yao CHENG Jian and ZHAO Hang-sheng |
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| Institution: | CHEN Yong~1,JIANG Jin-yao~2,CHENG Jian~3,ZHAO Hang-sheng~1 |
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| Abstract: | In this paper, a chaos-based sequence generator with the multidimensional chaotic system is designed because the sequence generated by the unimodal map is easy to attack. Some modifications are introduced to the n-dimensional nonlinear digital filters in order to improve the period and distribution property of the resulted sequence. The property of chaotic sequences that are generated is similar to that of PN sequence. The performance of chaotic DSSS systems is close to that of conventional systems. The distinguished advantages of chaotic sequences compared to conventional sequences lie in that they have a large code family, good randomness and high security. Chaotic sequences are thus very suitable for satellite spread spectrum systems. |
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| Keywords: | spreading spectrum chaos nonlinear digital filters |
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