结合脉冲位置调制的正交多用户混沌通信系统  

Orthogonal Multi-user Chaotic Communication System Combined with Pulse Position Modulation

作　　者：尹湘香 吴林煌[1] 黄胜秋 YIN Xiangxiang;WU Linhuang;HUANG Shengqiu(College of Advanced Manufacturing,Fuzhou University,Quanzhou 362251,China;Fujian Shuntianyi Construction Co.,Ltd.,Longyan 364105,China)

机构地区：[1]福州大学先进制造学院,福建泉州362251 [2]福建省顺天亿建设有限公司,福建龙岩364105

出　　处：《无线电工程》2023年第11期2585-2589,共5页Radio Engineering

基　　金：国家自然科学基金面上项目(61871132)。

摘　　要：提出一种基于Walsh码序列的脉冲位置调制差分混沌键控通信系统(A Pulse Position Modulated Differential Chaotic Keying Communication System Based on Walsh Code Sequences,PPM-DCSK-WC)。利用Walsh码的正交性实现多用户传输,避免了用户间干扰对系统误码性能产生影响,提高系统的数据安全性,也大大提升了系统的传输速率,同时也具备了脉冲位置调制差分混沌键控通信系统(PPM-DCSK)的误码率性能优势。仿真结果表明,在多径瑞利衰落信道上,当误码率水平为10^(-3)时,PPM-DCSK-WC多用户方案的误码率比传统多用户方案提高了4 dB,在高时延扩展信道上性能增益更是能达到6 dB。该系统被认为是一种优秀的多用户短距离无线通信系统。A Pulse Position Modulated Differential Chaotic Keying Communication System Based on Walsh Code Sequences(PPM-DCSK-WC)is proposed.The system utilizes the orthogonality of Walsh codes to achieve multi-user transmission,avoiding the impact of inter-user interference on the system BER performance,improving the data security of the system,and also greatly increasing the system transmission rate,as well as having the advantage of high BER performance of the PPM-DCSK communication system.The simulation results show that the BER of the PPM-DCSK-WC multi-user scheme is 4 dB higher than that of traditional multi-user scheme when the BER level is 10^(-3) in multipath Rayleigh fading channel,and the performance gain can reach 6 dB in the high delay extension channel.Consequently,this system can be regarded as an outstanding multi-user short-range wireless communication system.

关 键 词：差分混沌移位键控 WALSH码 多用户 脉冲位置调制 

分 类 号：TN911.3[电子电信—通信与信息系统]