Methods and systems for determining the location of an electronic device
US7800541B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Mar 31, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of the present invention include a method of determining a location of a mobile device. The method comprises transmitting a signal between a plurality of known locations and receiving signal at device of unknown location such as a mobile device. The signal may include multiple tones having different frequencies and resulting in sets of residual phase differences. The location of the mobile device may be determined using the known locations and the frequency and phase differences between the transmitted tones. In one embodiment, OFDM signals may be used between an access point and mobile device, for example, to determine the location of the mobile device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.