2015/02/09 by Mohammad R. Vedady Moghadam, Rui Zhang, Moghadam, Mohammad R. Vedady +1 · 1 citation
Engineering · #Energy Harvesting in Wireless Networks #FOS: Electrical engineering #Full-Duplex Wireless Communications #Systems and Control (eess.SY) #Wireless Power Transfer Systems #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.1502.02385
openalex publication_date 2015/02/09 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
Magnetic resonant coupling (MRC) is a practically appealing method for realizing the near-field wireless power transfer (WPT). The MRC-WPT system with a single pair of transmitter and receiver has been extensively studied in the literature, while there is limited work on the general setup with multiple transmitters and/or receivers. In this paper, we consider a point-to-multipoint MRC-WPT system with one transmitter sending power wirelessly to a set of distributed receivers simultaneously. We derive the power delivered to the load of each receiver in closed-form expression, and reveal a "near-far" fairness issue in multiuser power transmission due to users' distance-dependent mutual inductances with the transmitter. We also show that by designing the receivers' load resistances, the near-far issue can be optimally solved. Specifically, we propose a centralized algorithm to jointly optimize the load resistances to minimize the power drawn from the energy source at the transmitter under given power requirements for the loads. We also devise a distributed algorithm for the receivers to adjust their load resistances iteratively, for ease of practical implementation.