Abstract
In recent years, energy efficiency in multi-hop cooperative power-line communication (PLC) and wireless systems has recently received considerable attention. This paper considers the dual-hop PLC/wireless parallel communication system based on decode and forward (DF), where the relay harvests the high noise inherent in PLC channels to further enhance energy efficiency. In this paper, we derive the exact analytic expression of energy efficiency and the closed expression of outage probability. In order to compare and highlight the achievable gain, we also analyzed the related performances of DF relaying PLC system with energy harvesting (DF-EH). Then based on the theoretical calculation and simulation results, the influence of energy-harvesting time factor and other parameters on the system performance is analyzed. The result shows that energy-harvesting time factor and power allocation are the key factors affecting system performance. Relevant conclusions provide necessary theoretical support for the application of energy harvest technology in mixed media cooperative communication.
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