【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。更多还原

【Abstract】 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.更多还原