Cooperative Power Control and Beamforming Design for Multi-Source Enabled Wireless Power Transfer Networks

European Conference on Antennas and Propagation, pp. 1–5

Abstract

In this paper, we study wireless power transfer (WPT) network with multiple WPT stations and multiple low-power devices. With installed uniform linear antenna array, WPT stations emit independent radio-frequency (RF) signals for cooperatively harvesting all devices. Analog beamforming has been applied for efficiently concentrating the emitted energy. Combining beamforming with multi-source WPT, we characterize out the harvested power for each device based on a practically nonlinear energy harvesting (EH) model. Allowing different beamforming schemes in multiple time slots, we formulate a joint power control and beamforming design problem fairly maximizing the total harvested energy at all devices. To tackle the problem non-convexity, we apply proved convexity in both antenna gain model and nonlinear EH model, and build convex problem approximation, which enables an iterative algorithm efficiently converging to a suboptimal solution. At last, we verify our proposed algorithm and highlight the WPT profits of our proposed solution via numerical results.

Authors 4

1. Xiaopeng Yuan Aachen INDA Institute

   RWTH Aachen University

   Affiliation as printed

   INDA Institute,RWTH,Aachen,Germany

   RWTH, INDA Institute, Aachen, Germany

2. Huanyu Zhang
   Affiliation as printed

   ZEKU Technology Co. LTD,Shanghai,China

   ZEKU Technology Co. LTD, Shanghai, China

3. Paul Zheng Aachen INDA Institute

   RWTH Aachen University

   Affiliation as printed

   INDA Institute,RWTH,Aachen,Germany

   RWTH, INDA Institute, Aachen, Germany

4. Anke Schmeink Aachen INDA Institute

   RWTH Aachen University

   Affiliation as printed

   INDA Institute,RWTH,Aachen,Germany

   RWTH, INDA Institute, Aachen, Germany