Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (6): 1856-1865.doi: 10.12305/j.issn.1001-506X.2023.06.30

• Communications and Networks • Previous Articles    

Physical layer security transmission schemes based on simultaneous wireless information and power transfer for multi-antenna relay systems

Guangda ZHANG1,*, Qinghua REN1,2, Zhikai FAN1   

  1. 1. Information and Navigation College, Air Force Engineering University, Xi'an 710077, China
    2. Key Laboratory of Aerospace Information Applications, China Electronics Technology Group, Shijiazhuang 050081, China
  • Received:2021-10-08 Online:2023-05-25 Published:2023-06-01
  • Contact: Guangda ZHANG

Abstract:

The two-stage physical layer security transmission scheme based on simultaneous wireless information and power transfer and friendly jamming signals aided is proposed to solve the energy-constrained problem of signal processing and secure transmission issues of confidential information upon the multi-antenna relay systems. Firstly, a multi-antenna relay system model based on the amplify-and-forward relay protocol is established. Secondly, considering the scenario of multiple eavesdroppers and non-collusion eavesdropping, and with the analysis of the transmission process of system energy and information, the optimal transmission antenna selection strategy and the optimal jamming antenna selection strategy based on Q-learning algorithm are respectively proposed in order to maximize the secrecy performance of the system. Thirdly, the expressions of the system's ergodic achievable secrecy rate are derived. Finally, the Monte Carlo simulation method is applied to verify the correctness of the theoretical derivation, and the influence of parameters such as the transmit signal-to-noise ratio, power splitting factor (PS), and power allocation coefficient on the secrecy performance of the system is analyzed. The simulation results show that the proposed transmission scheme outperforms compared with the existing security transmission scheme.

Key words: physical layer security, cooperative relay, simultaneous wireless information and power transfer (SWIPT), Q-learning, power splitting(PS), ergodic achievable secrecy rate(EASR)

CLC Number: 

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