Transmit Power Allocation for Physical Layer Security in Cooperative Multi-Hop Full-Duplex Relay Networks
1
Department of Electronic Engineering, Gachon University, Seongnam 13120, Korea
2
Department of Electronic Engineering, Myongji University, Yongin 17058, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Sensors 2016, 16(10), 1726; https://doi.org/10.3390/s16101726
Received: 2 September 2016
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Revised: 29 September 2016
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Accepted: 12 October 2016
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Published: 17 October 2016
(This article belongs to the Section Sensor Networks)
In this paper, we consider a transmit power allocation problem for secure transmission in multi-hop decode-and-forward (DF) full-duplex relay (FDR) networks, where multiple FDRs are located at each hop and perform cooperative beamforming to null out the signal at multiple eavesdroppers. For a perfect self-interference cancellation (PSIC) case, where the self-interference signal at each FDR is completely canceled, we derive an optimal power allocation (OPA) strategy using the Karush-Kuhn-Tucker (KKT) conditions to maximize the achievable secrecy rate under an overall transmit power constraint. In the case where residual self-interferences exist owing to imperfect self-interference cancellation (ISIC), we also propose a transmit power allocation scheme using the geometric programming (GP) method. Numerical results are presented to verify the secrecy rate performance of the proposed power allocation schemes.
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Keywords:
physical layer security; relay networks; full-duplex relay; power allocation; secrecy rate
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MDPI and ACS Style
Lee, J.-H.; Sohn, I.; Kim, Y.-H. Transmit Power Allocation for Physical Layer Security in Cooperative Multi-Hop Full-Duplex Relay Networks. Sensors 2016, 16, 1726. https://doi.org/10.3390/s16101726
AMA Style
Lee J-H, Sohn I, Kim Y-H. Transmit Power Allocation for Physical Layer Security in Cooperative Multi-Hop Full-Duplex Relay Networks. Sensors. 2016; 16(10):1726. https://doi.org/10.3390/s16101726
Chicago/Turabian StyleLee, Jong-Ho, Illsoo Sohn, and Yong-Hwa Kim. 2016. "Transmit Power Allocation for Physical Layer Security in Cooperative Multi-Hop Full-Duplex Relay Networks" Sensors 16, no. 10: 1726. https://doi.org/10.3390/s16101726
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