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Power Allocation and Splitting Algorithm for SWIPT in Energy Harvesting Networks with Channel Estimation Error

채널 추정 오차가 존재하는 에너지 하베스팅 네트워크에서 SWIPT를 위한 파워 할당 및 분할 알고리즘

  • Lee, Kisong (Department of Information and Telecommunication Engineering, Kunsan National University) ;
  • Ko, JeongGil (Department of Software and Computer Engineering, Ajou University)
  • Received : 2016.05.12
  • Accepted : 2016.05.27
  • Published : 2016.07.31

Abstract

In the next generation wireless communication systems, an energy harvesting from radio frequency signals is considered as a method to solve the lack of power supply problem for sensors. In this paper, we try to propose an efficient algorithm for simultaneous wireless information and power transfer in energy harvesting networks with channel estimation error. At first, we find an optimal channel training interval using one-dimensional exhaustive search, and estimate a channel using MMSE channel estimator. Based on the estimated channel, we propose a power allocation and splitting algorithm for maximizing the data rate while guaranteeing the minimum required harvested energy constraint, The simulation results confirm that the proposed algorithm has an insignificant performance degradation less than 10%, compared with the optimal scheme which assumes a perfect channel estimation, but it can improve the data rate by more than 20%, compared to the conventional scheme.

Keywords

Energy Harvesting Networks;Power Allocation and Splitting;Channel Estimation Error

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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