全双工窃听下的无人机通信保密性能分析

doi:10.12305/j.issn.1001-506X.2022.01.39

Abstract

Abstract:

Focusing on the problem of unmanned aerial vehicle (UAV) energy limitation and communication vulnerability to eavesdropping attack, a wireless powered UAV communication model based on energy harvesting is proposed, and its secrecy performance under full-duplex proactive eavesdropping is analyzed. Firstly, the line-of-sight (LoS) and non-line-of-sight (NLoS) path loss probabilistic model based on elevation is used to model the ground-air wireless channel. Secondly, the transmission outage probabilities of UAV is limited to a maximum tolerable threshold and the optimal coding rate of the base station is obtained, and then the analytical closed-form expression of UAV's secrecy outage probability is derived. Finally, Monte-Carlo simulations verify the validity of the theoretical derivation, and analyze the influence of base station's transmission power, time factor of energy harvesting, environments and other factors on the security of UAV communication, which provides a guide and basis for the design of actual system.

Key words: unmanned aerial vehicle (UAV) communication, physical layer security, secrecy outage probability, full-duplex proactive eavesdropping, energy harvesting

CLC Number:

TN918

Danyu DIAO, Buhong WANG, Kunrui CAO, Runze DONG, Tianhao CHENG. Secrecy performance analysis of UAV-based communications against full-duplex eavesdropping[J]. Systems Engineering and Electronics, 2022, 44(1): 313-319.

Figures/Tables 8

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References 30

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参数	仿真值
保密速率阈值C_th	0.1
路径损耗系数τ	2
信道小尺度衰落均值ω_us、ω_uj、ω_js	1
环境参数φ	27.23
环境参数Ψ	0.08
环境参数η_LoS	2.3
环境参数η_NLoS	34
全双工主动窃听者发射功率P_j/dB	10
基站发射功率P_s/dB	10
噪声功率σ²/dB	0
能量采集时间因子α	0.5
能量转换效率η	0.9
回环自干扰系数λ	0.2

环境	φ	Ψ	η_LoS/dB	η_NLoS/dB
郊区	4.88	0.43	0.1	21
市区	9.61	0.11	1.6	23
密集城区	12.08	0.11	1.6	23
高层建筑的城市	27.23	0.08	2.3	34

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Secrecy performance analysis of UAV-based communications against full-duplex eavesdropping

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