| 多用户正交多级差分混沌键控通信系统 |
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| 引用本文： | 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. DOI: 10.3969/j.issn.1001-506X.2021.01.30 |
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| 作者姓名： | 张刚 刘金惠 张鹏 |
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| 作者单位： | 1. 重庆邮电大学通信与信息工程学院, 重庆 4000652. 重庆邮电大学教务处, 重庆 400065 |
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| 基金项目： | 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) |
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| 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。
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| 关 键 词： | 差分混沌键控 多用户 多进制 Walsh码 误比特率 |
| 收稿时间： | 2020-03-16 |
Multi-user orthogonal multi-level differential chaos shift keying communication system |
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| Gang ZHANG,Jinhui LIU,Peng ZHANG. Multi-user orthogonal multi-level differential chaos shift keying communication system[J]. System Engineering and Electronics, 2021, 43(1): 244-250. DOI: 10.3969/j.issn.1001-506X.2021.01.30 |
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| Authors: | Gang ZHANG Jinhui LIU Peng ZHANG |
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| Affiliation: | 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China2. Academic Affairs Office, Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
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| 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. |
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| Keywords: | differential chaos shift keying(DCSK) multi-user multi-ary Walsh code bit error rate(BER) |
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