基于混沌的FM-MU-ODCSK通信系统性能分析  

Performance analysis of FM-MU-ODCSK communication system based on chaos

作　　者：刘卓 王黎明 韩星程 罗秀丽 韩凯越 聂彬 LIU Zhuo;WANG Li-ming;HAN Xing-cheng;LUO Xiu-li;HAN Kai-yue;NIE Bin(Key Laboratory of Information Detection and Processing,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,信息探测与处理山西省重点实验室,太原030051

出　　处：《信息技术》2022年第9期7-13,共7页Information Technology

基　　金：山西省青年科技研究基金(201901D211250);中北大学校基金(XJJ201927)。

摘　　要：对现有混沌映射存在混沌性质弱、分布不均匀等缺点进行了研究,设计了一种新的二维混沌映射——Logistic-Chebyshev混沌映射(2D-LCCM),它将混沌的映射范围扩大到了整个分形参数区间内,使其具有更好的混沌特性。其次,提出了一种基于2D-LCCM的调频多用户正交差分移位键控(FM-MU-ODCSK)调制方案。该方案在调频差分移位键控(FM-DCSK)调制方案的基础上实现了多用户传输。结果表明,在一定的信噪比和扩频因子条件下,FM-MU-ODCSK调制方案的误码性能优于FM-DCSK。A new two-dimensional chaotic map named Logistic-Chebyshev Chaotic Map(2D-LCCM)is designed based on the study of the weak chaotic property and uneven distribution of the existing chaotic map,and it extends the mapping range of chaos to the whole fractal parameter range,so that it has better chaotic characteristics.Secondly,a Frequency Modulation Multi-User Orthogonal Differential Shift Keying(FM-MU-ODCSK)scheme based on 2D-LCCM is proposed.The multi-user transmission is realized based on Frequency Modulation Differential Chaos Shift Keying(FM-DCSK)modulation scheme.The results show that under certain SNR and spreading factors,the performance of the FM-MU-ODCSK modulation scheme is better than that of the FM-DCSK.

关 键 词：混沌通信 差分混沌键控 混沌序列 多用户 误码率 

分 类 号：TN911[电子电信—通信与信息系统]