基于改进混沌扩频序列的多用户混沌扩频通信系统的研究与仿真  

Research and simulation of multi-user chaotic spread spectrum communication based on modified chaotic sequence

作　　者：俞斌[1,2] 王炼红[2] 贾雅琼[1,3] 

机构地区：[1]湖南工学院电气与信息工程系,湖南衡阳421002 [2]湖南大学电气与信息工程学院,长沙410082 [3]华中科技大学电子与信息工程系,武汉430074

出　　处：《计算机应用研究》2013年第4期1161-1165,共5页Application Research of Computers

基　　金：湖南省教育厅科研项目(10C0579;09C296);衡阳市科技计划项目(2010KJ31;2011KG68);湖南工学院重点科研项目(HY10001)

摘　　要：提出一种改进混沌扩频序列,并将其应用在多用户混沌扩频通信系统中,给出了多用户混沌扩频通信系统的理论推导和SIMULINK仿真模型。对该系统进行了详细的性能分析,包括信噪比、用户数、改进混沌扩频序列的分形参数和初始值等各自对系统误码率的影响,并比较了改进混沌扩频序列与传统混沌扩频序列的系统误码率随信噪比和用户数的变化情况。结果表明改进混沌扩频序列要好于传统混沌扩频序列的系统误码率,具有较好的抗噪声和抗多址干扰的能力。This paper constructed a multi-user chaotic spread spectrum communication system based on a modified chaotic sequence.And it gave the theory and SIMULINK simulation model of this system.It also detailelly illustrated the performance of the modified chaotic spread spectrum communication,including the fractal parameter and the initial value of the modified chao-tic sequence,the signal noise rate and the number of user.Simulations analyzed the bit error rate（BER） how it changes depending on the changes in the signal noise rate or the number of user in both the modified chaotic sequence and the traditional chaotic sequence.The results show that the performance of the modified chaotic sequence is much better than that of the traditional chaotic sequence,and the system has very good ability against noise and multiple access interference.

关 键 词：改进混沌扩频序列 多用户混沌扩频通信系统 误码率 SIMULINK 

分 类 号：TN914.42[电子电信—通信与信息系统] TP301.5[电子电信—信息与通信工程]