卫星通信下行链路鲁棒安全波束成形设计

doi:10.12305/j.issn.1001-506X.2021.05.25

Abstract

Abstract:

Two robust secure beamforming (BF) schemes are proposed for multiple eavesdroppers in downlink of a multi-beam satellite communication system, where only the approximate locations of multiple eavesdroppers are known. On one hand, under the secrecy rate maximization criterion subject to the total satellite transmit power constraint, and a robust BF scheme based on the generalized Rayleigh quotient is proposed to obtain the analytical expression of BF weight vector. On the other hand, in order to obtain the maximal secrecy energy efficiency under the constraints of the secrecy rate and the total satellite transmit power, a nested iterative algorithm based on the combination of fractional programming, penalty function and difference of convex programming theory is proposed to implement the robust BF design. Simulation results show that the proposed two robust BF schemes can obtain better secrecy performance than the classical non-robust BF schemes.

Key words: multi-beam satellite, physical layer security, robust beamforming(BF), convex optimization

CLC Number:

TN927

Chenwei GU, Zhi LIN, Min LIN, Luyao XIE, Jian OUYANG, Shuo HUANG. Robust secure beamforming design for the downlink of satellite communications[J]. Systems Engineering and Electronics, 2021, 43(5): 1361-1370.

Figures/Tables 10

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References 26

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参数	取值
窃听者个数K/个	2
卫星的载波频率f_c/GHz	20
单边半功率波束宽度θ_{3 dB}/(°)	0.4
卫星天线增益b_max/dB	52
地面用户天线增益G_max/dB	30
电路功耗P_c/dBW	5
噪声带宽B/MHz	50
噪声温度T/K	300

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Robust secure beamforming design for the downlink of satellite communications

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