高速置换索引差分混沌移位键控通信系统  

High-rate permutation index differential chaos shift keying communication system

作　　者：张刚[1] 陈茜 蒋忠均 ZHANG Gang;CHEN Xi;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]贵州省网络安全和信息化委员会,贵州贵阳550000

出　　处：《系统工程与电子技术》2024年第3期1125-1133,共9页Systems Engineering and Electronics

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

摘　　要：为了提高置换索引差分混沌移位键控系统的数据传输速率和能量效率,提出了高速置换索引差分混沌移位键控通信系统。该系统采用置换矩阵索引多元信息,并携带一个调制位。发射端将参考信号复制P次作为信息承载信号,通过希尔伯特变换,每个信息时隙中多传输N个用户的信息,将信号级联到正交频分复用系统进行正交载波调制,大大提高了系统的数据传输速率;同时推导了该系统在高斯白噪声信道和多径瑞利衰落信道下的误码率表达式。理论分析及仿真结果证明,该系统相比其他置换索引类系统具有高速率、低误码率的良好特性,有更好的应用前景。In order to improve the data rate and energy efficiency of permutation index differential chaos shift keying(DCSK),a high rate permutation index DCSK communication system is proposed.The system uses a permutation matrix to index the multi-ary information and carry a modulation bit.The transmitter replicates the reference signal P times as the information bearing signal,then transmits N more user information in each time slot through Hilbert transform,and cascades the signal to orthogonal frequency division multiplexing system for orthogonal carrier modulation,which greatly improves the data transmission rate of the system.At the some time,the bit error rate(BER)expressions of the system are derived for Gaussian white noise channel and multipath Rayleigh fading channel,and the theoretical analysis and simulation results prove that the system has good characteristics of high speed and low BER compared with other permutation index type systems and better application prospects.

关 键 词：差分混沌移位键控 高速 正交频分复用 置换矩阵 希尔伯特变换 

分 类 号：TN911.3[电子电信—通信与信息系统]