Tracking a radio beacon from a moving device
US9709656B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jul 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and devices are disclosed, for tracking a radio beacon from a moving device, while the beacon transmits periodic signals, which the device detects at least at two different locations, and the device provided with information enabling determining the time difference between transmissions of these periodic signals. The method discloses a formula for estimating the angle between the course of the moving device and the beacon: arccos [c*(TDOA12−TDOT12)/baseline12]; wherein the moving device detects signal 1 and signal 2 respectively at location 1 and location 2, the distance between these locations defined as baseline12, TDOA12 is the Time Difference of Arrival of the signals at the two locations, TDOT12 is the time difference between transmission of these signals, and c is the speed of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.