一种混合结构混沌扩频序列的设计及仿真
首发时间:2011-02-22
摘要:针对传统单一混沌映射生成扩频序列复杂度低,抗截获性能差的缺陷,提出一种利用串联结构的混合映射模型产生混沌扩频序列的方法。通过描述其相关函数的三维图形,定性分析了不同初值组合对扩频序列相关性的影响;提出了一种混沌序列的优选算法,并将优选序列应用于DS-CDMA系统。仿真结果表明,本方法产生混沌扩频序列具有优良的性能和较高的保密性。
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Designing and simulation of chaotic spreading sequences based on compounded structure
Abstract:Aiming at overcoming the shortcoming that the spreading spectrums sequences generated by traditional single chaotic map has low complexity and poor performance against by intercepted, a method for generating chaotic spread-spectrum sequences based on the series hybrid mapping model was proposed. By describing the 3D graphics of their correlation function, the influence of spread-spectrum sequences on different initial combinations is qualitative discussed; an optimization selection algorithm is also presented. Those optimized sequences are applied to DS-CDMA system. The results of simulation show that the chaotic spread-spectrum sequences generated by the proposed method have good performance and more secure for communication.
Keywords: Hybrid mapping Serial structure Optimization algorithm DS-CDMA
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No.4410549560684129****
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