摘要
针对DCSK系统信息传输速率低及安全性差的问题,提出一种时间反转参考信号调制DCSK(TR-RMDCSK)通信系统方案。该方案采用RM调制实现了在一个帧时隙传输两个比特,携带偶数信息比特的混沌信号既是信息信号,也是传输奇数信息比特的参考信号,将参考信号进行时间反转,消除了同一帧时隙信号间的相关性,提升了比特传输速率及信号保密性。推导了高斯信道下的理论误码率,并在高斯信道和莱斯信道下进行了性能仿真分析。结果表明,该方案在不牺牲传输速率的情况下改善了误码性能,提高了系统安全性。
To address the problems of low information transmission rate and lack of security in the DCSK system,a time reversal reference signal modulated DCSK(TR-RM-DCSK)communication system scheme is proposed to improve the bit transmission rate and security.This scheme uses RM modulation to transmit two bits in a frame time slot.The chaotic signal carrying even information bits is not only an infor⁃mation signal,but also a reference signal for transmitting odd information bits.The reference signal is time reversed,the correlation between the same frame time slot signals is eliminated,thereby bit transmis⁃sion rate and signal security are improved.The theoretical bit error rate under Gaussian channel is derived,and performance simulation analysis is conducted on both Gaussian and Rician channels.The results show that this scheme improves error rate performance and improves system security without sacri⁃ficing transmission rate.
作者
隋涛
孙凡
冯永新
刘芳
SUI Tao;SUN Fan;FENG Yongxin;LIU Fang(College of Automation&Electrical Engineering,Shenyang Ligong University,Shenyang 110159,China;College of Information Science&Engineering,Shenyang Ligong University,Shenyang 110159,China)
出处
《火力与指挥控制》
CSCD
北大核心
2024年第9期11-17,24,共8页
Fire Control & Command Control
基金
国家自然科学基金(61971291)
中央引导地方科技发展专项基金资助项目(2022020128-JH6/1001)。
关键词
差分混沌移位键控
时间反转
参考信号调制
误码性能
differential chaotic shift keying(DCSK)
time reversal
reference signal modulation
error code performance
