A Generic Receiver Architecture for MIMO Wireless Power Transfer with Non-Linear Energy Harvesting

Abstract

This letter investigates a multiple-input multiple-output (MIMO) wireless power transfer (WPT) system under practical non-liner energy harvesting (EH) models. We propose a new generic energy receiver (ER) architecture consisting of $N$ receive antennas and $L$ rectifiers, for which one power splitter is inserted after each antenna to adaptively split the received radio frequency (RF) signals among the $L$ rectifiers for efficient non-linear RF-to-direct current (DC) conversion. With the proposed architecture, we maximize the total harvested DC power at the ER, by jointly optimizing the transmit energy beamforming at the energy transmitter (ET) and the power splitting ratios at the ER. Numerical results show that our proposed design by exploiting the nonlinearity of EH significantly improves the harvested DC power at the ER, as compared to two conventional designs.

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Cited by in corpus (8)

• Beamforming Optimization for MIMO Wireless Power Transfer with Nonlinear Energy Harvesting: RF Combining versus DC Combining
• Joint Waveform and Beamforming Optimization for MIMO Wireless Power Transfer
• Markov Decision Process Based Design of SWIPT Systems: Non-linear EH Circuits, Memory, and Impedance Mismatch
• SWIPT-Enabled Multiple Access Channel: Effects of Decoding Cost and Non-linear EH Model
• Cognitive Wireless Power Transfer in the Presence of Reactive Primary Communication User
• Joint Beamforming and Power Control for Throughput Maximization in IRS-assisted MISO WPCNs
• Time-Division Energy Beamforming for Multiuser Wireless Power Transfer with Non-Linear Energy Harvesting
• Reusing Wireless Power Transfer for Backscatter-assisted Relaying in WPCNs