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Power Allocation and Splitting Algorithm with Low-complexity for SWIPT in Energy Harvesting Networks

에너지 하베스팅 네트워크에서 SWIPT를 위한 저복잡도를 갖는 파워 할당 및 분할 알고리즘

Lee, Kisong;Ko, JeongGil
이기송;고정길

  • Received : 2016.04.05
  • Accepted : 2016.04.18
  • Published : 2016.05.31

Abstract

Recently, energy harvesting, in which energy is collected from RF signals, has been regarded as a promising technology to improve the lifetime of sensors by alleviating the lack of power supply problem. In this paper, we try to propose an efficient algorithm for simultaneous wireless information and power transfer. At first, we find the lower bound of water-level using the probability density function of channel, and derive the solution of power allocation in energy harvesting networks. In addition, we derive an efficient power splitting method for satisfying the minimum required harvested energy constraint. The simulation results confirm that the proposed scheme improves the average data rate while guaranteeing the minimum required harvested energy constraint, compared with the conventional scheme. In addition, the proposed algorithm can reduce the computational complexity remarkably with insignificant performance degradation less than 10%, compared to the optimal solution.

Keywords

Energy Harvesting;Simultaneous Wireless Information and Power Transfer;Power Allocation and Splitting;Low-Complexity

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Acknowledgement

Supported by : National Research Foundation of Korea (NRF)