Multi-channel TDOA system
US8576829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2007 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Dec 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless network has at least one wireless unit which transmits messages in multiple channels. The messages are synchronously transmitted using a transmit clock signal. The at least one wireless unit starting transmission of the messages at intervals consisting of at least one of one or multiple periods of the transmit clock signal. A plurality of location receivers are used for receiving the messages at different channels transmitted by the wireless units within the wireless network and determining a time of arrival for the received messages. At least one master unit is used for receiving the time of arrival from each of the location units. The location of the wireless unit is to be determined on the Time Difference Of Arrival (TDOA) of the transmitted messages at the location units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.