摘要
混沌序列作为扩频系统中的扩频码,具有序列丰富、保密性好等特性。针对传统的Logistic混沌序列及其改进型在序列遍历性和随机性等方面不太理想的问题,提出了一种新型的分段Logistic混沌扩频通信算法。在分析了所提混沌序列的随机性、相关性、初值敏感性和Lyapunov指数的基础上,将其应用于扩频通信系统中。仿真结果表明:新序列较传统的Logistic混沌序列及其改进型作为扩频通信地址码,在误码率和信息保密特性方面有很大改善,从而证明了新算法的有效性。
Chaotic sequence as spreading code in spread spectrum systems has the characteristics of rich sequences and good confidentiality.Traditional Logistic chaotic sequence as well as its modified sequence is not ideal in ergodicity and randomness of its sequence.To solve this problem,a new piecewise Logistic chaotic spread spectrum communication algorithm was proposed based on the analysis of the randomness,correlation,initial sensitivity and Lyapunoy exponents of the referred chaotic sequence,and applied to spread spectrum communication.The simulation results show that the algorithm greatly improves the error rate and confidentiality in the spread spectrum communication compared to the traditional logistic chaotic sequence and its modified sequence,which proves that the algorithm mentioned in this article is effective.
出处
《计算机科学》
CSCD
北大核心
2013年第1期59-62,共4页
Computer Science
基金
2012年西北工业大学本科毕业设计(论文)重点扶持项目
武器装备预研基金(9140A25030411HK0339)资助
关键词
分段Logistic序列
混沌
扩频通信
Piecewise Logistic sequence
Chaotic
Spread spectrum communication
