许嘉平,,
张天骐
重庆邮电大学信号与信息处理重庆市重点实验室 ??重庆 ??400065
基金项目:国家自然科学基金(61771085, 61371164)，信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)，重庆市教育委员会科研项目(KJ1600429)
详细信息
作者简介:张刚：男，1976年生，博士，副教授，主要研究方向为混沌同步、混沌保密通信
许嘉平：男，1993年生，硕士生，研究方向为混沌保密通信
张天骐：男，1971年生，博士后，教授，主要研究方向为扩频信号的盲处理、神经网络实现以及信号的同步处理
通讯作者:许嘉平 1309095272@qq.com
中图分类号:TN918计量
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被引次数:0
出版历程
收稿日期:2018-01-25
修回日期:2018-07-18
网络出版日期:2018-07-30
刊出日期:2018-11-01
Performance Analyze for Multiuser-DCSK Communication System Based on Hilbert Transform
Gang ZHANG,Jiaping XU,,
Tianqi ZHANG
Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:The National Natural Science Foundation of China (61771085, 61371164), The Project of Key Laboratory of Signal and Information Processing of Chongqing (CSTC2009CA2003), The Research Project of Chongqing Educational Commission (KJ1600429)
摘要
摘要:针对差分混沌移位键控(DCSK)传输速率低的问题，该文提出一种基于希尔伯特变换的多用户DCSK(HMU-DCSK)通信系统。在固定阶数的Walsh码条件下，通过希尔伯特变换将正交基信号集合提高1倍，并确保分配给每个用户的载波信号正交。推导了在Rayleigh衰落信道下的误码率公式并进行仿真。结果表明，相同N值下HMU-DCSK系统的传输速率是传统多用户DCSK系统的2倍；相同传输速率下HMU-DCSK系统的误码性能明显优于传统多用户DCSK系统。
关键词:混沌通信/
多用户/
Walsh码/
希尔伯特变换/
传输速率
Abstract:A multiuser Differential Chaos Shift Keying (DCSK) communication system based on Hilbert transform is proposed (HMU-DCSK), to solve the problem of low transmission rate of DCSK. Under the condition of fixed-order Walsh codes, the set of orthogonally-based signals is doubled by the Hilbert transform and the carrier signals assigned to each user are guaranteed to be orthogonal. The Bit-Error-Rate (BER) formula in Rayleigh fading channel is derived and numerous simulations are conducted. The simulation results show that the transmission rate of HMU-DCSK system is twice that of traditional multiuser DCSK system under the same N value, meanwhile, the BER performance of HMU-DCSK system is obviously better than the traditional multi-user DCSK system under the same transmission rate.
Key words:Chaotic communication/
Multiuser/
Walsh codes/
Hilbert transform/
Transmission rate
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