Differential chaos shift keying-based wireless power transfer

TL;DR

This paper explores the use of differential chaos shift keying (DCSK) waveforms in wireless power transfer, demonstrating that a correlator at the receiver enhances energy harvesting efficiency through analytical insights and design optimization.

Contribution

It introduces a DCSK-based WPT architecture with an analog correlator, providing analytical expressions and design insights for improved energy harvesting performance.

Findings

Correlator at the receiver significantly boosts energy harvesting.

Derived closed-form expressions for peak-to-average-power ratio and harvested power.

Waveform parameters critically influence energy harvesting efficiency.

Abstract

In this work, we investigate differential chaos shift keying (DCSK), a communication-based waveform, in the context of wireless power transfer (WPT). Particularly, we present a DCSK-based WPT architecture, that employs an analog correlator at the receiver in order to boost the energy harvesting (EH) performance. By taking into account the nonlinearities of the EH process, we derive closed-form analytical expressions for the peak-to-average-power-ratio of the received signal as well as the harvested power. Nontrivial design insights are provided, where it is shown how the parameters of the transmitted waveform affects the EH performance. Furthermore, it is demonstrated that the employment of a correlator at the receiver achieves significant EH gains in DCSK-based WPT systems.