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Sensors 2017, 17(4), 781;

The Physical Layer Security Experiments of Cooperative Communication System with Different Relay Behaviors

School of Marine Science and Technology, Tianjin University, 300072 Tianjin, China
School of Electrical Automation and Information Engineering, Tianjin University, 300072 Tianjin, China
Author to whom correspondence should be addressed.
Academic Editor: Yuh-Shyan Chen
Received: 10 January 2017 / Revised: 27 March 2017 / Accepted: 31 March 2017 / Published: 6 April 2017
(This article belongs to the Section Sensor Networks)
Full-Text   |   PDF [1955 KB, uploaded 6 April 2017]   |  


Physical layer security is an attractive security mechanism, which exploits the randomness characteristics of wireless transmission channel to achieve security. However, it is hampered by the limitation of the channel condition that the main channel must be better than the eavesdropper channel. To alleviate the limitation, cooperative communication is introduced. Few studies have investigated the physical layer security of the relay transmission model. In this paper, we performed some experiments to evaluate the physical layer security of a cooperative communication system, with a relay operating in decode-and-forward (DF) cooperative mode, selfish and malicious behavior in real non-ideal transmission environment. Security performance is evaluated in terms of the probability of non-zero secrecy capacity. Experiments showed some different results compared to theoretical simulation: (1) to achieve the maximum secrecy capacity, the optimal relay power according to the experiments result is larger than that of ideal theoretical results under both cooperative and selfish behavior relay; (2) the relay in malicious behavior who forwards noise to deteriorate the main channel may deteriorate the eavesdropper channel more seriously than the main channel; (3) the optimal relay positions under cooperative and selfish behavior relay cases are both located near the destination because of non-ideal transmission. View Full-Text
Keywords: physical layer security; different relay behavior; experiment physical layer security; different relay behavior; experiment

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Su, Y.; Han, G.; Fu, X.; Xu, N.; Jin, Z. The Physical Layer Security Experiments of Cooperative Communication System with Different Relay Behaviors. Sensors 2017, 17, 781.

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