Low probability of detection emergency signaling system and method
US7944351B1 · kind B1 · utility
8Cited by
9References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2009 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Jun 17, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/28
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An emergency locating system can include emergency transceivers and rescue transceivers. The emergency transceivers can be capable of repeat transmission of a distress message using a variable power level and variable spreading factor. A receive transceiver can be capable of receiving the distress messages and sending a confirmation message to the emergency transceiver. The emergency transceiver can be capable of receiving the confirmation message and terminating transmission of the distress message.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.