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http://dx.doi.org/10.6109/jkiice.2017.21.11.2022

Time Switching-based Analog Network Coding for Maximizing the Minimum Required Secrecy Capacity in Energy Harvesting Networks  

Lee, Kisong (School of Information and Communication Engineering, Chungbuk National University)
Choi, Hyun-Ho (Department of Electrical, Electronic and Control Engineering, Hankyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.11, 2017 , pp. 2022-2028 More about this Journal
Abstract
Recently, the energy shortage of sensors and the leakage of private information are considered as serious problems as the number of sensors is increasing due to the technological advance in Internet-of-Things. RF energy harvesting, in which sensors collect energy from external RF signals, and physical layer security become increasingly important to solve these problems. In this paper, we propose a time switching-based network analog coding for improving information security in wireless networks where the relay can harvest energy from source signals. We formulate 2-hop relay networks where an eavesdropper tries to overhear source signals, and find an optimal time switching ratio for maximizing the minimum required secrecy capacity using mathematical analysis. Through simulations under various environments, it is shown that the proposed scheme improves the minimum required secrecy capacity significantly, compared to the conventional scheme.
Keywords
Energy Harvesting; Time Switching; Secrecy Capacity; Physical Layer Security; Analog Network Coding;
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Times Cited By KSCI : 4  (Citation Analysis)
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