双模三维索引调制差分混沌移位键控系统的设计及性能分析  

Design and performance analysis of dual-mode triple-dimensional index modulation differential chaos shift keying system

作　　者：贺利芳[1] 武兴根 薛岩松 HE Lifang;WU Xinggen;XUE Yansong(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,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]重庆邮电大学光电工程学院,重庆400065

出　　处：《通信学报》2024年第6期176-186,共11页Journal on Communications

基　　金：重庆市自然科学基金资助项目(No.CSTB2023NSCQ-MSX0235,No.cstc2021jcyj-msxmX0836)。

摘　　要：针对传统差分混沌移位键控系统速率低、误码性能差的问题,提出了一种双模三维索引调制差分混沌移位键控系统。该系统利用时隙、正交码和顺序索引,在选中与未选中的时隙上均传输信息比特。在接收端,通过采用降噪技术,减小了噪声的方差,提升了系统误码性能。推导了在加性白高斯噪声信道和多径瑞利衰落信道下的比特差错率公式。仿真结果显示,与相似的混沌键控系统相比,所提系统具备更高的数据速率和更为优越的误码性能。Given the issues of low transmission rate and poor bit error performance in traditional differential chaos shift keying systems,a dual-mode three-dimensional index modulation differential chaos shift keying(DMTD-IM-DCSK)system was proposed.This system simultaneously utilized time slots,orthogonal codes,and sort index to transmit information on both selected and unselected time slots.At the receiver,the variance of noise was reduced and the system’s error performance was improved by the use of denoising techniques.Formulas for bit error rate(BER)were derived for additive white Gaussian noise channels and multipath Rayleigh fading channels.Simulation results demonstrate that,compared to similar chaotic keying systems,the proposed system achieves higher data rates and superior error performance.

关 键 词：混沌通信 差分混沌移位键控 索引调制 联合解调算法 

分 类 号：TN911.3[电子电信—通信与信息系统]