Passive radio frequency identification ranging
US9983303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Mar 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/75
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems, methods, apparatuses, and computer readable media are disclosed for providing timing-based distance measurement to a passive radio frequency identification (“RFID”) tag using one or more wideband RF signals synchronized with the standard narrowband RF signal. In some embodiments, the narrowband RF signal activates a passive RFID tag creating a backscatter reflection target which returns a modulated narrowband signal and a wideband signal from the passive RFID tag. The one or more wideband receivers determine time-of-flight and/or time-of-arrival measurements for the returned wideband signal. A location measurement is then calculated for the passive RFID tag using the tag data, the known location of the wideband transceivers, and the time-of-flight/time-of-arrival data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.