Data Communication Over a Novel Capacitive Resonant Wireless Power Transmission System

This paper presents the performance of a novel capacitive resonant wireless power transmission (WPT) system as a communication link. To test the system's ability to transmit data, a channel model of the implemented system was created in MATLAB, along with a non-coherent receiver model, and used in a simulation to obtain the bit error rate by passing 10,000 on-off keyed symbols through it. Because the system utilizes resonant coupling, which is detrimental to the ability to communicate data due to the inherent narrowband nature of resonance, both maximum power transfer and maximum data rate cannot be achieved simultaneously. As a result, modified Miller encoding (which is used in RFID) was used in the simulation to encode the data and the data rate was slowed down to improve the bit error rate. Both simulations have shown that the WPT system has comparable performance to an additive white Gaussian noise channel given an appropriate data rate.