Secure Transmission of Cooperative Zero-Forcing Jamming for Two-User SWIPT Sensor Networks

Sensors

Yueming Cai¹  Xuanxuan Tang¹  Junquan Hu¹  Dechuan Chen¹  Weiwei Yang¹  Wendong Yang¹ 

[1] College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China;

关键词: physical layer security;    zero-forcing jamming;    secrecy outage probability;    secrecy throughput;    wireless sensor networks;   

DOI  :  10.3390/s18020331

来源: DOAJ

【 摘 要 】

In this paper, the secrecy performance of the two-user simultaneous wireless information and power transfer (SWIPT) sensor networks is studied and a novel secure transmission scheme of cooperative zero-forcing (ZF) jamming is proposed. The two sensors opportunistically conduct the SWIPT and cooperative ZF jamming, respectively, where the energy required for jamming the eavesdropper is provided by the SWIPT operation so as to keep the energy balance at the sensors in the long run. By deriving the exact closed-form expressions of the secrecy outage probability and the secrecy throughout, we provide an effective approach to precisely assess the impacts of key parameters on the secrecy performance of the system. It has been shown that the secrecy outage probability is a monotonically increasing function of the growth of secrecy rate (R s), and a monotonically decreasing function of the increase of the transmit signal-to-noise ratio (γ S), and energy conversion efficiency ( η ). Furthermore, the secrecy throughput could be enhanced whenηincreases, which becomes especially obvious when a large γ S is provided. Moreover, the existence of an optimum R s maximizing the secrecy throughput is depicted, which also grows with the increase of γ S. Simulations are provided for the validation of the analysis.

【 授权许可】

Unknown