The Optimization of Covert Communication in Asymmetric Jammer-Assist Systems

被引：0
作者：
Qiao, Sen [1 ]
Zhu, Ruizhi [1 ]
Ji, Xiaopeng [1 ]
Zhao, Junjie [1 ]
Ding, Huihui [1 ]
Ferrari, Gianluigi
机构：
[1] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing 210044, Peoples R China
来源：
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 02期
基金：
中国国家自然科学基金;
关键词：
covertcommunication; asymmetric jammer; binary phase shift keying; Taylor series expansion; LOW PROBABILITY; NOISE; ENERGY; LIMITS;
D O I：
10.3390/app14020483
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This research investigates the feasibility of covert and reliable communication between Alice and Bob in the presence of a vigilant adversary, Willie, employing a jammer in a complex Gaussian channel. Alice strategically manipulates the noise-power ratio along the real and imaginary axes to disrupt Willie's detection capabilities. Covertness constraints are quantified using KL divergence, and transmission performance is assessed through mutual information. Additionally, an optimization method is introduced to enhance covert communication by fine-tuning the amplitude gain and noise-power ratio. Numerical results confirm the effectiveness and superiority of the proposed method, showcasing its ability to maximize covert transmission rates.
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页数：14
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