MiCC: An Integrated Wireless Charging and Communication System

摘要

Magnetic Resonant Coupling Wireless Power Transfer (MRC-WPT) systems have emerged as a promising solution for contactless energy transmission. However, integrating data communication with power transfer remains challenging due to the conflicting requirements for efficiency and stability. In this work, we design and implement MiCC, a system that can simultaneously achieve communication and power supply using MRC-WPT signals. First, a carrier-modulated magnetic communication method is designed, which embeds information into the resonant signal to avoid interference with power control. Subsequently, a Binary Frequency Shift Keying (2FSK) modulation strategy based on frequency switching is introduced at the inverter level to enable data transmission. Finally, we develop a dual-carrier hierarchical modulation scheme that spectrally decouples power and communication signals, enhancing system robustness. Simulation results show that our system can achieve an information transmission rate of up to 20 kbps while maintaining a charging efficiency above 90%. Testbed experiments verified that, with minor modifications, data rates exceeding 18 kbps can be achieved on commercial off-the-shelf smartphones.