基于瑞利衰落信道的SIMO-HPO-CDSK混沌通信方案及其性能分析  

Performance Analysis of SIMO-HPO-CDSK Chaotic Communication Scheme Based on Rayleigh Fading Channels

作　　者：段俊毅 杨华[3] Duan Junyi;Yang Hua(Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Nanjing University of Aeronautics and Astronautics,Nanjing 210003,China;College of Communication and Signals,Nanjing Institute of Railway Technology,Nanjing 210031,China;College of Automation,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京航空航天大学电磁频谱空间认知动态系统重点实验室,南京210003 [2]南京铁道职业技术学院通信信号学院,南京210031 [3]南京邮电大学自动化学院,南京210003

出　　处：《科技通报》2024年第6期48-56,共9页Bulletin of Science and Technology

基　　金：国家自然科学基金(61971240);电磁频谱空间认知动态系统工信部重点实验室开放课题(KF20181905);“333工程”科研资助项目(BRA2020322)。

摘　　要：本文提出单输入多输出高速率相位正交CDSK (single-input-multiple-output high-data-rate phase-orthogonality correlation-delay-shift-keying,SIMO-HPO-CDSK),在接收端设置多天线获得分集增益。采用正交载波调制相同时隙的2个比特信息,获得高传输速率且无信号内干扰,瑞利衰落信道下分析性能和仿真。结果表明:SIMO-HPO-CDSK系统误码率随着接收端天线数量增加而下降;在接收方天线数量相同的条件下,由于没有无信号内干扰,与DCSK (differential chaos shift keying),CDSK和高效DCSK (high-efficiency-DCSK)相比,该方案具有出色的误码率性能;与PO-CDSK (phase-orthogonality CDSK)相比,由于同步传输2个比特,该方案频谱利用率提高一倍。A single input multiple output(SIMO)architecture for the High-Data-Rate PO-CDSK(HPO-CDSK)system is proposed.By employing multiple antennas at the receiver end,SIMO structure can obtain a diversity gain.Two bits information occupies the same time slot and modulated by the orthogonal carrier,a high rate can be obtained with-out intra-signal interference.The theoretical BER(bit error rate)expression and simulations are performed based on a Rayleigh fading channel.Results show that:the BER of SIMO-HPO-CDSK decreases with the increase in the number of receiver antennas;due to no ISI(inter symbol interference)component and SIMO architecture,the proposed SI-MO-HPO-CDSK architecture has an outstanding BER performance in contrast to those of DCSK(high-efficiency-DC-SK),CDSK and High-Efficiency DCSK(HE-DCSK);because two bits transmit in the same time slot,compared with our system's PO-CDSK(phase-orthogonality CDSK),our spectral efficiency is double.

关 键 词：单输入多输出 HPO-CDSK 瑞利衰落信道 

分 类 号：TN918[电子电信—通信与信息系统]