降噪载波索引差分混沌键控通信系统  

Noise Reduction Carrier Index Differential Chaos Shift Keying Modulation System

作　　者：阎昕宇 杨华[1] 徐思远 蒋国平 林庚辰 YAN Xinyu;YANG Hua;XU Siyuan;JIANG Guoping;LIN Gengchen(College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China;College of Automation&College of Artificial Intelligence,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,南京210023 [2]南京邮电大学自动化学院、人工智能学院,南京210023

出　　处：《北京邮电大学学报》2022年第3期74-80,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金面上项目(61971240);江苏省333工程项目(BRA2020322)。

摘　　要：为降低载波索引差分混沌键控系统中接收到的参考信号和信息信号中噪声的不利影响,提出了一种降噪载波索引差分混沌键控通信系统。该系统对发射端的混沌信号进行多次复制操作,并借助对接收到的信号分段取平均以实现降噪。分析推导了该系统在加性高斯白噪声信道和多径Rayleigh衰落信道下的理论误码率公式并进行了蒙特卡洛仿真。理论分析和仿真结果表明,所提系统在能量效率、传输速率和载波利用率相同的情况下,可以显著地改善载波索引差分混沌键控系统的误码性能。To reduce negative effects of the noise interferences in the received reference and information signals in carrier index differential chaos shift keying system,a noise reduction carrier index differential chaos shift keying communication system is proposed.In this system,the transmitted chaotic signals are duplicated for several times and the averaging operation are performed on received signals to reduce the noise.Analytical bit error rate expressions over additive white Gaussian noise channel and multipath Rayleigh fading channels are derived and verified by Monte Carlo simulations.Theoretical analysis and simulation results show that the proposed system can efficiently improve the BER performance of the carrier index differential chaos shift keying system with the same energy efficiency,transmission rate and carrier utilization.

关 键 词：差分混沌键控 载波索引调制 降噪 比特误码率 

分 类 号：TN918[电子电信—通信与信息系统]