扩容型正交抑噪多级差分混沌移位键控通信系统  

Expanded Capacity Orthogonal Noise Suppression Multi-level Differential Chaotic Shift Keying Communication System

作　　者：张刚[1] 王磊[1] 蒋忠均 ZHANG Gang;WANG Lei;JIANG Zhongjun(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Cyberspace Administration of Guizhou Province,Guiyang 550000,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]中共贵州省委网络安全和信息化委员会办公室,贵阳550000

出　　处：《电子与信息学报》2023年第3期1032-1042,共11页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61771085);重庆市自然科学基金(cstc2021jcyj-msxmX0836);重庆市教育委员会科研项目(KJQN201900601)。

摘　　要：针对多进制差分混沌移位键控系统传输速率较小且误码率(BER)较差的缺点,该文提出一种扩容型正交抑噪多进差分混沌移位键控(DCSK)通信系统。在该系统的发送端设计了一种改进型混沌基信号发生器,可产生4组正交的混沌基信号,使得通信容量极大提升。定义综合效用函数,并引入粒子群算法对系统各参数优化。对该系统在加性高斯白噪声(AWGN)和Rayleigh衰落信道下理论误码率公式进行推导及系统仿真同时对比不同系统的综合效用函数。结果表明,该系统具有更低的误码率和更优综合效用,具有较好的实际应用价值。To address the disadvantages of small transmission rate and poor Bit Error Rate(BER)of M-ary differential chaos shift keying.An expanded capacity orthogonal noise suppression multi-level Differential Chaotic Shift Keying(DCSK)communication system is proposed.An improved orthogonal chaotic signal generator is designed at the transmitter of the system.It can generate four sets of orthogonal chaos-based signals,which can greatly increase the communication capacity.An integrated utility function is defined and a particle swarm algorithm is introduced to optimize each parameter of the system.The theoretical BER equation is derived and the system simulation is analyzed under the Additive White Gaussian Noise(AWGN)channel and Rayleigh fading channel.The integrated utility functions of different systems are also compared.The results show that the system has a lower BER and better integrated utility compared,and has a better practical application.

关 键 词：混沌基信号 多进制 差分混沌移位键控 正交调制 

分 类 号：TN914[电子电信—通信与信息系统] TN911.3[电子电信—信息与通信工程]