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

Abstract

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)

CLC Number:

TN911.3

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.

Figures/Tables 11

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

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