Design Consideration of Bidirectional Wireless Power Transfer and Full-Duplex Communication System via a Shared Inductive Channel

Abstract

Communication between the primary and secondary sides is pivotal to the wireless power transfer (WPT) system. The system control commands and feedback information need simultaneous wireless information and power transfer (SWIPT). In this paper, a FSK-based SWIPT system with full-duplex communication via a shared channel is provided. Considering the complexity of the coupling relationship in this kind of full-duplex SWIPT system, this paper proposes an analysis method based on the transmission channel, studies the crosstalk between the power channel and the information channel, and between the forward and reverse transfer of information. A design method of full-duplex communication SWIPT system based on shared coupling channels is provided. A 60 W SWIPT prototype with a full-duplex communication rate of 20 kbps is built to verify the proposed method.

Energy Signal-Aided Secure Beamforming and Self-Energy Recycling in Full-Duplex Wireless-Powered Relay Networks

“…The SWIPT protocol's security is crucial given that SWIPT wireless networks are susceptible to eavesdropping due to the broadcasting and open characteristics of wireless media. The physical-layer (PHY) security technique that uses the inherent randomness of wireless channels is an efficient approach to improving the secrecy of wireless networks [20] establishes a FSK based swipt system powered by DC power supply for full duplex communication through shared channel. In [21], the end point node working in the fullduplex (FD) pattern in a single-input-single-output (SISO) SWIPT system, to obtain the highest security throughput of the system by a cooperative majorization of time switching (TS) coefficient, as well as codeword transmission rate, was studied.…”