Position locating rescue transceiver
First Claim
1. A transceiver comprising:
- a first radio receiver and a second radio receiver, a radio transmitter and an antenna supported by a common housing, wherein said first radio receiver receives first signals from a first geolocation means for determining location information and high accuracy clocking information, wherein said location information describes a location of said transceiver;
clock means, supported by said common housing and coupled to said first radio receiver, said clock means for providing timing and frequency control signals, said clock means slaved to said high accuracy clocking information;
wherein said radio transmitter is coupled to said antenna and receives timing and frequency control signals from said clock means, said radio transmitter for sending another signal including said transceiver location information to a communication system, and wherein said second radio receiver receives second signals from said communication system.
2 Assignments
0 Petitions
Accused Products
Abstract
A secure, portable position locating radio has a geolocation receiver providing local position and timing information from geolocation means (e.g. GPS satellites) and a local transceiver for sending local position information to a communication system (e.g., an airborne or orbiting transceiver). A crypto unit is provided between the receiver and local transceiver for encrypting the local position information prior to transmission. A data processor coupled to the local transceiver, receiver and crypto unit controls operation of the device, including storing local position information and separating signals broadcast by the communication system into those intended or not intended for the device. An external interface and display and a real-time clock (e.g., slaved to the GPS receiver) are also coupled to the data processor. Encryption keys and message abbreviation codes are conveniently loaded into the device from a demountable accessory unit at the interface, and stored therein.
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Citations
27 Claims
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1. A transceiver comprising:
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a first radio receiver and a second radio receiver, a radio transmitter and an antenna supported by a common housing, wherein said first radio receiver receives first signals from a first geolocation means for determining location information and high accuracy clocking information, wherein said location information describes a location of said transceiver; clock means, supported by said common housing and coupled to said first radio receiver, said clock means for providing timing and frequency control signals, said clock means slaved to said high accuracy clocking information; wherein said radio transmitter is coupled to said antenna and receives timing and frequency control signals from said clock means, said radio transmitter for sending another signal including said transceiver location information to a communication system, and wherein said second radio receiver receives second signals from said communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radio comprising:
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receiver means responsive to GPS satellites for receiving therefrom information permitting said radio to determine local position information describing a location of said radio and accurate time information; transceiver means for communicating with at least one remote station via a transceiver satellite, by sending a burst signal of less than one second duration including said local position information to said at least one remote station via said transceiver satellite and receiving therefrom an acknowledgment that said local position information has been received from said at least one remote station, wherein said transceiver means uses said accurate time information from said receiver means to determine a narrow time window during which to transmit said burst signal to said at least one remote station; one or more antennas coupled to said receiver means and said transceiver means; and a common hand-portable housing containing said receiver means and transceiver means and supporting said one or more antennas. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A device comprising:
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a geolocation receiver for providing, from geolocation means, local position information describing a location of said device and high accuracy clocking information; a transceiver coupled to said geolocation receiver for sending a message including said local position information and one or more symbols indicative of user status to a communication system, said transceiver using said high accuracy clocking information provided by said geolocation receiver to determine a narrow time window during which to send said message to said communication system; input means for receiving user status information; processor means coupled to said input means and said transceiver, said processor means for receiving said user status information from said input means and providing to said transceiver means for inclusion in said message, said one or more symbols which correspond to said user status information; at least one antenna coupled to said geolocation receiver and said transceiver; and a common housing containing said geolocation receiver, transceiver, input means and processor means and coupled to said at least one antenna. - View Dependent Claims (15, 16, 17)
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18. A radio, said radio being a position locating radio and comprising:
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a receiver for providing local position information and high accuracy time or frequency information; a clock coupled to said receiver and having an output corrected by said high accuracy time or frequency information from said receiver; a transceiver for communicating with at least one remote station through a communication system, said transceiver coupled to said clock and receiving high accuracy clocking signals therefrom; input means for receiving from a user of said radio, user status information describing a status of said user; and processing means coupled to said transceiver and said input means, said processing means for receiving said user status information from said input means, selecting one or more symbols having a predetermined meaning most closely corresponding to said user status information from a predetermined list, and providing said selected symbols to said transceiver; wherein said receiver, clock, transceiver, input means, and processing means are carried by a common man-portable housing supporting one or more antennas coupled to said receiver and said transceiver. - View Dependent Claims (19, 20)
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21. A transceiver comprising:
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a first radio receiver for receiving first signals from a first geolocation means for determining therefrom transceiver location information and high accuracy time and frequency information; a clock circuit coupled to said first radio receiver, said clock circuit for providing timing and frequency control signals, said clock circuit slaved to said high accuracy time and frequency information from said first radio receiver; a transmitter coupled to said first radio receiver and said clock circuit, said transmitter sending another signal containing said transceiver location information to a communication system; and a second radio receiver for receiving second signals from said communication system, wherein said first and second radio receivers, said transmitter, and said clock circuit are located in a common hand-holdable housing and coupled to one or more antennas supported by said common hand-holdable housing. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification