Wireless Powered Communication System Design with Nonlinear Energy Harvester
Subject Areas : electrical and computer engineeringمهرنوش میرحاج 1 , مریم مسجدی 2 , محمدفرزان صباحی 3
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3 - دانشگاه اصفهان
Keywords: Energy harvesting, wireless powered communication network, nonlinear energy harvester, beamforming, multiple-input and multiple-output,
Abstract :
In this paper, a wireless powered communication network (WPCN) is considered, in which the hybrid access point (HAP) and the users are equipped with multiple antennas.In the downlink phase, an energy HAP transfers the energy signal to the users and in the uplink phase, users apply the harvested energy to transfer their information to the HAP using spatial division multiple access (SDMA) technology. By considering the nonlinear behavior of energy harvester in system design and aiming to maximize the sum of the rates, we propose an optimal method for designing energy pre-coding matrices, user information pre-coding matrices, and time devoted to the downlink and uplink phases. For this purpose, we rewrite the problem as a convex optimization problem by appropriate change of variables and propose a method to solve it. The simulation results show that in practical scenarios, employing the nonlinear energy harvesting model in the system design could reduce the transmitted energy, increase and the sum rate of the users.
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