English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Waveform optimization has shown its great potential to boost the performanceof far-field wireless power transfer (WPT). Current research has optimizedtransmit waveform, adaptive to channel state information (CSI), to maximize theharvested power in WPT while accounting for energy harvester (EH)'snon-linearity. However, the existing transmit waveform design disregards thenon-linear high power amplifiers (HPA) at the transmitter. Driven by this, thispaper optimizes the multi-carrier waveform at the input of HPA to maximize theharvested DC power considering both HPA's and EH's non-linearities. Twooptimization models are formulated based on whether the frequencies of themulti-carrier waveform are concentrated within the transmit pass band or not.Analysis and simulations show that, while EH's non-linearity boosts the powerharvesting performance, HPA's non-linearity degrades the harvested power.Hence, the optimal waveform shifts from multi-carrier that exploits EH'snon-linearity to single-carrier that reduces HPA's detrimental non-lineardistortion as the operational regime of WPT becomes more sensitive to HPA'snon-linearity and less sensitive to EH's non-linearity (and inversely).Simultaneously, operating towards HPA's non-linear regime by increasing theinput signal power benefits the harvested power since HPA's DC power supply isbetter exploited, whereas the end-to-end power transfer efficiency (PTE) mightdecrease because of the increasing non-linear degradation. Throughout thesimulations, the proposed waveforms show significant gain over those notaccounting for HPA's non-linearity, especially in frequency-flat channels. Wealso compare the two proposed waveforms and show that the severity of HPA'snon-linearity dictates which of the two proposed waveforms is more beneficial.

Waveform Design for Wireless Power Transfer with Power Amplifier and Energy Harvester Non-Linearities