Robust secure design for relay wireless sensor networks with simultaneous wireless information and power transfer

Hehao Niu, Bangning Zhang, Daoxing Guo and Mingyue Lu

International Journal of Distributed Sensor Networks, 2017, vol. 13, issue 6, 1550147717711591

Abstract: In this article, we investigate the physical layer security problem in relay wireless sensor networks with simultaneous wireless information and power transfer. Specifically, by considering the energy receiver which may act as potential eavesdropper and assuming that only imperfect channel state information can be attained, we propose a joint robust beamforming and artificial noise scheme. We formulate the relay power minimization problem under both the secrecy rate constraint and the energy harvesting constraints, which is non-convex and hard to tackle. By studying the hidden convexity of the problem, we propose an iterative algorithm combining semi-definite relaxation and a gradient-based method. In addition, a suboptimal rank-one reconstruction method is presented. Simulation results show that the proposed robust scheme achieves better performance than other schemes.

Keywords: Simultaneous wireless information and power transfer; energy harvesting; physical layer security; wireless sensor networks; multi-antenna relay (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:sae:intdis:v:13:y:2017:i:6:p:1550147717711591

DOI: 10.1177/1550147717711591

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