Location estimation and tracking for passive RFID and wireless sensor networks using MIMO systems
US10127412B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2017 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Apr 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2209/75
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for location estimation and tracking for passive RFID and wireless sensor networks in accordance with embodiments of the invention are disclosed. In one embodiment, a process for obtaining location information using an RFID reader system includes transmitting a combined interrogation and ranging signal from a plurality of antennas, where the ranging signal is a pseudorandom signal, receiving a backscattered return signal from an RFID tag at one or more receive antennas, extracting an information signal from the return signal and decoding the information signal to obtain RFID tag data, extracting a received ranging signal from the return signal, and estimating a range to the RFID tag based upon correlation between the ranging signal and the received ranging signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.