Dual bandwidth time difference of arrival (TDOA) system
US8208939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2008 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Oct 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0258
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wireless location system has at least one wireless tag to be located by the wireless location system, wherein the at least one wireless tag transmits two wireless signals having a known time relationship and having different bandwidths. A plurality of receivers is provided wherein a first receiver receives and processes a first of the two wireless signals and estimates a time to arrive (TOA) of the first wireless signal, and a second receiver receives and processes a second of the two wireless signals and estimates a TOA of the second wireless signal at the second transceiver. The plurality of receivers is time synchronized based on a common timing signal. A location server is coupled to each of the plurality of receivers. The location server receives the TOA of the first wireless signal from the first receiver and the TOA of the second wireless signal from the second receiver. The location server calculating a TDOA of the two wireless signals and estimates a position of the at least one wireless tag based on the TDOA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.