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For industrial wireless sensor networks, it is essential to reliably sense and deliver the environmental data on time to avoid system malfunction. While energy harvesting is a promising technique to extend the lifetime of sensor nodes, it also brings new challenges for system reliability due to the stochastic nature of the harvested energy. In this paper, we investigate the optimal energy management...
In this paper, we address the problem of energy-efficient power allocation for secure communications in wireless powered relaying systems. The advantages of a massive multiple-input multiple-output (M-MIMO) relay are explored to improve the energy efficiency of both wireless information and power transfer. We first give a detailed performance analysis, and obtain a closed-form expression of the secrecy...
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