多用户混沌序列扩频通信系统设计与性能分析  

Design and Performance Analysis of Multi-user Chaotic Sequence Spread-Spectrum Communication System

作　　者：孙克辉[1] 周家令[1] 牟俊[1] 

机构地区：[1]中南大学物理科学与技术学院,长沙410083

出　　处：《电子与信息学报》2007年第10期2436-2440,共5页Journal of Electronics & Information Technology

基　　金：湖南省自然科学基金(04JJ3077)资助课题

摘　　要：该文介绍了多用户混沌扩频通信系统原理,分析了Chebyshev,Logistic,Tent 3种混沌扩频序列的平衡性、相关性,建立了多用户混沌扩频通信系统动态可视化仿真模型,利用模型研究了这3种不同混沌扩频序列扩频码的初始值、信噪比、用户数以及截取的序列长度对系统误码率的影响。仿真结果表明,Chebyshev映射的扩频性能最好,Logistic映射次之,Tent映射最差,且这3种混沌扩频码的扩频性能均优于传统的扩频码。The principle of multi-user chaotic sequence spread-spectrum communication system is introduced. Performances of balance and correlation properties of three different chaotic spread series （Chebyshev, Logistic and Tent） are analyzed. The dynamic visual simulation modeling of multi-user chaotic sequence spread-spectrum communication system is established. Based on this modeling, the error-bit rate performances of these systems with different initial values, signal to noise ratio, number of users and the length of sequence are investigated. Simulation results show that the spread-spectrum performance of Chebyshev is the best, then Logistic and Tent, and the spread-spectrum performances of the three chaotic spread series are better than that of the conventional spread sequence.

关 键 词：混沌序列 直接序列扩频 平衡性 相关性 

分 类 号：TN914.42[电子电信—通信与信息系统]