基于MIMO的IDCSK保密通信系统性能分析  

Performance analysis of IDCSK secure communication in MIMO systems

作　　者：贺冰琰[1] 刘年生[1] 孙涛[2] HE Bingyan;LIU Niansheng;SUN Tao(Computer Engineering College,Jimei University,Xiamen 361021,China;Electronic Information School,Wuhan University,Wuhan 430072,China)

机构地区：[1]集美大学计算机工程学院,福建厦门361021 [2]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2018年第12期1114-1118,共5页Engineering Journal of Wuhan University

基　　金：福建省教育厅科研基金项目(编号:JA15291);福建省自然科学基金项目(编号:2017J0161)

摘　　要：给出了MIMO环境下改进型差分混沌相移键控(MIMO-IDCSK)通信系统的设计方案,并对系统性能进行了分析.传统的DCSK系统需要2个时间片分别发送混沌参考信号和数据承载信号,在IDCSK系统中,利用时间反转操作产生和数据承载信号正交的参考信号,然后对2路信号在1个时间片内进行求和、发送.改进方案把比特间隔缩短了一半,使得数据传输速率提高了1倍,并提高了频谱利用率.仿真结果显示:和传统DCSK通信系统相比,新型MIMO-IDCSK保密通信系统的性能更为优越,与理论分析相符.This paper presents the design and performance analysis of an improved differential chaos shift keying(IDCSK)communications in a multiple-input multiple-output(MIMO)system.In conventional DCSK scheme,sending reference and data carrier signals need two time slices,in the IDCSK system,a time reversal operation is used to generate an orthogonal reference signal to the data carrier signal and then add up these two sequences into one time slice before transmission.This improved scheme reduces the bit duration to half,which doubles the data rate and improves spectral efficiency.The simulation results show that the performance of the novel MIMO-IDCSK secure communication system is greatly superior to that of the conventional DCSK communication system.The theoretical analysis and simulation results are well consistent.

关 键 词：非相干混沌系统 多输入多输出 改进型差分混沌键控 性能分析 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]