Mobile device frequency offset determination and TDoA localization
US11743091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2022 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Apr 28, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0035
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of estimating a clock frequency offset in a mobile device relative to a clock frequency of a controller within a UWB network comprises (a) determining, for each of a plurality of anchors, an anchor clock frequency offset relative to the controller clock frequency, (b) broadcasting an anchor data packet from each anchor, the anchor data packet including the respective anchor clock frequency offset, (c) receiving at least one anchor data packet at the mobile device, (d) estimating a mobile device clock frequency offset relative to the anchor clock frequency of the anchor from which the at least one anchor data packet was received, and (e) estimating the clock frequency offset in the mobile device based on the estimated mobile device clock frequency offset and the anchor clock frequency offset included in the at least one received anchor data packet. Furthermore, a TDoA-based localization method and a TDoA-based localization system are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.