多用户正交多级差分混沌键控通信系统

doi:10.3969/j.issn.1001-506X.2021.01.30

系统工程与电子技术 ›› 2021, Vol. 43 ›› Issue (1): 244-250.doi: 10.3969/j.issn.1001-506X.2021.01.30

多用户正交多级差分混沌键控通信系统

张刚¹(), 刘金惠^1,*(), 张鹏²()

1. 重庆邮电大学通信与信息工程学院, 重庆 400065
2. 重庆邮电大学教务处, 重庆 400065

收稿日期:2020-03-16 出版日期:2020-12-25 发布日期:2020-12-30
通讯作者: 刘金惠 E-mail:zhanggang_cqupt@163.com;1342343570@qq.com;zhangpeng@cqupt.edu.cn
作者简介:张刚(1976-),男,教授,博士,主要研究方向为混沌同步,混沌保密通信。E-mail:zhanggang_cqupt@163.com|张鹏(1980-),男,高级工程师,硕士,主要研究方向为混沌同步,混沌键控技术。E-mail:zhangpeng@cqupt.edu.cn
基金资助:
国家自然科学基金(61771085);重庆市教育委员会科研项目(KJ1600407);重庆市教育委员会科研项目(KJQN201900601)

Multi-user orthogonal multi-level differential chaos shift keying communication system

Gang ZHANG¹(), Jinhui LIU^1,*(), Peng ZHANG²()

1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2. Academic Affairs Office, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2020-03-16 Online:2020-12-25 Published:2020-12-30
Contact: Jinhui LIU E-mail:zhanggang_cqupt@163.com;1342343570@qq.com;zhangpeng@cqupt.edu.cn

摘要/Abstract

摘要：

针对传统差分混沌键控(differential chaos shift keying, DCSK)采用多电平方式传输多进制信息导致误比特率(bit error rate, BER)高的缺点,提出一种多用户正交多级DCSK(multi-user orthogonal multi-level DCSK, MOM-DCSK)通信系统。该系统将传输的多进制信息映射为不同的传输系数,多个传输系数分别乘以对应的Walsh码后调制在信息承载信号上,并且通过不同的延时传输多用户信息。在加性高斯白噪声(additive white Gaussian noise, AWGN)信道和多径Rayleigh衰落信道中推导了系统的理论BER公式并进行了仿真分析。结果显示，该系统在传输多进制信息时拥有较好的误码性能,并且在多用户传输领域中有较好的实际应用价值。

关键词: 差分混沌键控, 多用户, 多进制, Walsh码, 误比特率

Abstract:

Aiming at the shortcomings of high bit error rate (BER) caused by the multi-level mode transmission of multi-ary information in the traditional differential chaos shift keying (DCSK) system, a multi-user orthogonal multi-level differential chaos shift keying (MOM-DCSK) communication system is proposed. The system maps the transmitted multi-ary information into different transmission coefficients, and the multiple transmission coefficients are multiplied by the corresponding Walsh code and modulated on the information bearing signal, which can transmite multi-user information through different delays. The BER formula of the system in the additive white Gaussian noise (AWGN) channel and the multi-path Rayleigh fading channel is derived, and the simulation analysis is carried out. The results show that the system has better bit error performance when the multi-ary information is transmitted, and has a good practical application value in the field of the multi-user transmission.

Key words: differential chaos shift keying(DCSK), multi-user, multi-ary, Walsh code, bit error rate(BER)

中图分类号:

TN911.3

张刚, 刘金惠, 张鹏. 多用户正交多级差分混沌键控通信系统[J]. 系统工程与电子技术, 2021, 43(1): 244-250.

Gang ZHANG, Jinhui LIU, Peng ZHANG. Multi-user orthogonal multi-level differential chaos shift keying communication system[J]. Systems Engineering and Electronics, 2021, 43(1): 244-250.

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二进制比特	传输系数
0 0	1 0 0 0
0 1	0 1 0 0
1 0	0 0 1 0
1 1	0 0 0 1

系统	乘法器数量	加法器数量
MFM-DCSK	Nβ	2(N-1)β
MOM-DCSK	2MNβ	(M－1)Nβ

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多用户正交多级差分混沌键控通信系统

Multi-user orthogonal multi-level differential chaos shift keying communication system

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