Wireless power systems including determination of channel transfer function from backscatter signals
US11133717B2 · kind B2 · utility
4Cited by
3References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Sep 28, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13095
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Examples described herein utilize a backscatter signal provided by a wirelessly powered device to estimate channel information, (e.g., a channel transfer function) between the wirelessly powered device and a transmitter system. The channel information may be used to optimize MIMO power transfer for linear as well as nonlinear backscatter devices. Examples of die method ‘may shift some or all of the power cost and complexity of coherent channel measurements from the WFD to the transmitters), and allow WPT optimization to milliwatt- or microwatt-class wirelessly powered devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.