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7616682 |
Method and device for chronologically synchronizing a location network
Chronologically synchronizing a unique positing signal generated by a positioning-unit device at a known location with a reference positioning signal generated by a reference transmitter at a known...
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7596186 |
Devices and methods of modulation and demodulation enabling the extension or replacement of a communications link, corresponding sender and receiver
A modulation device comprises for each carrier frequency: means of discrimination between a signal coming from a first channel of a communications link and a signal coming from a second channel of...
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7492314 |
User equipment navigation solution with position determination of a navigation signal reflector
User equipment navigation solution with position determination of a navigation signal reflector methods and systems are described. In an embodiment, navigation signals transmitted from global...
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7477191 |
System and method for performing time difference of arrival location without requiring a common time base or clock calibration
A method for performing Time Difference Of Arrival (TDOA) that eliminates the need for a common time base or clock calibration and a system for implementing the method. The method relies on a...
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7437225 |
Flight management system
The present invention is a system and method for providing flight management to one or more aircraft via a communication link between a fight management system located outside the aircraft and a...
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7406311 |
Method and apparatus for selectively operating satellites in tundra orbits
A satellite system provides geosynchronous satellites in elliptical orbits in respective elliptical orbital planes separated by 120 degrees. The satellites traverse a common figure-eight ground...
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7366463 |
Military UHF and commercial Geo-mobile system combination for radio signal relay
A radio signal relay device such as satellite is used to cover several relatively small geographical regions with relatively narrow beams as well as a relatively large geographical region with a...
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7072611 |
Method and system for improving communication
A modular cellular wireless communication base station includes a plurality of active radiator modules located at a desired antenna location. Each module includes at least one antenna, a...
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7069111 |
Method and system for controlling a robot
A system and method are described that use impulse radio technology to enhance the capabilities of a robot. In one embodiment, a system, a robot and a method are provided that use the communication...
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6931232 |
Bi-static communication relay architecture
A bi-static communication relay includes a receiver and transmitter carried by different platforms. In particular, the transmitter may be carried by a geosynchronous satellite forming a broadcast...
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6879875 |
Low cost multisensor high precision positioning and data integrated method and system thereof
The design of the low cost GPS/IMU positioning and data integrating method, which employs integrated global positioning system/inertial measurement unit enhanced with dual antenna GPS carrier phase...
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6847893 |
Horizontal/vertical exclusion level determination scheme for RAIM fault detection and exclusion implementation
A method for satellite receiver autonomous integrity monitoring (RAIM) real time fault detection and exclusion implementation comprising the following steps: (1) continuously computing a horizontal...
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6844844 |
System comprising a satellite with radiofrequency antenna
The invention concerns a system comprising a radiofrequency antenna stationed in an orbit around the earth, and illuminating means for transmitting and/or receiving likewise orbiting round the...
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6745124 |
Method and system for determining a navigating vehicle location
The present invention provides a system, a method and a computer usable medium including a program for determining a position of a mobile vehicle. This may be accomplished by receiving a...
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6697008 |
Distributed electronic warfare system
A distributed electronic warfare system includes a central control site for controlling and receiving data from the system and utilizes a satellite communications system for communications within...
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6696942 |
Emergency warning network
An emergency warning network including a base station for broadcasting a warning signal and a first, earth-orbiting satellite for receiving the warning signal and rebroadcasting such to extend the...
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6677893 |
Method and apparatus for locating the source of unknown signal
A method of locating the source of an unknown signal of varying frequency received by receive antennas ( 16, 18 ) via relay satellites ( 12, 14 ) involves downconversion of received signals to a...
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6593877 |
Method for determining the position of a transmitting beacon
A method of determining the position of a transmitting beacon transmitting a signal to certain satellites in a constellation of satellites, which satellites in turn retransmit retransmitted signals...
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6563457 |
Method and system for determining a position of an object using two-way ranging in a polystatic satellite configuration
A method and system for determining a position of an object utilizes two-way ranging and polystatic techniques. A first communication transceiver at a first known location provides a bidirectional...
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6549162 |
Method and apparatus for transmitting real time data from aircraft to ground stations using a data protocol over a satellite system
Provided is a system and method for providing data originating from an aircraft to a ground-based device using a satellite communications link. The system includes an aircraft-based transceiver to...
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6545998 |
Supplemental satellite communication processing
Apparatus for enhancing the processing capabilities of a satellite communication system including an uplink receiver 40 deployable with a first satellite 20 . A first processor 50 deployable...
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6525995 |
Method and apparatus for displaying local time on radio-controlled timepieces
A radio-controlled timepiece is controlled by time telegrams emitted by a regional transmitter. When the timepiece is out of the effective range of the regional transmitter, the timepiece is...
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6501423 |
Method and system of directing an antenna in a two-way satellite system
A system for directing an antenna for transmission over a two-way satellite network is disclosed. A transceiver is coupled to the antenna; the transceiver transmits and receives signals over the...
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6417799 |
Method of locating an interfering transmitter for a satellite telecommunications system
The invention relates to a method of locating a jammer ( 14 ) of a satellite telecommunications system ( 10 ). To locate the jammer, at least two of the following three measurements are performed: ...
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6404769 |
Directional routing of packets in a satellite network
A method and apparatus encompasses a technique for routing an information packet through a satellite communications system 20 from a source satellite 38 to a destination satellite 40 . A path...
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6362772 |
Transponder plot system and method
A system and method for providing remote viewing of satellite transponder plots. The system and method piovides for remote viewing of transponder plots derived from transponders located on a...
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6317688 |
Method and apparatus for achieving sole means navigation from global navigation satelite systems
A sole means global navigation apparatus adapted for use on an aircraft includes a GPS receiver to provide GPS measurement data and an inertial sensor system adapted to provide inertial...
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6292106 |
Acoustical system and method for simultaneously locating and tracking multiple personnel in rooms of a building
A radio frequency (RF) sync pulse is transmitted throughout a building having a plurality of rooms to be traversed by a plurality of players during, for example, an assault training exercise....
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6282179 |
Method and system for reducing multipath fading in bent-pipe satellite communications systems
A method and system of forming communication links in a satellite communications system. The satellite communications system includes a plurality of transmitter groups, a satellite and a plurality...
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6018312 |
Locating the source of an unknown signal
A method of determining the location of an unknown source (10) transmitting an unknown signal to satellite relays (14 and 16) comprises receiving the signal from the relays at respective receivers...
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5995497 |
Method and apparatus for switching code division multiple access modulated beams in a satellite
In a code division switch in a satellite communication system each of a plurality of uplink CDMA modulated RF beams, each including a plurality of uplink traffic channels, are down converted to IF...
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5963165 |
Transmit-receive telecommunication system with high efficiency multibeam equally loaded transmitters
A design of equally loaded, under varying traffic load conditions, high efficiency power amplifiers for a multibeam communication system is presented. Output beam contains signals of only one beam...
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5920804 |
Method and apparatus for communications hand-off between multiple satellite systems
A method and apparatus for handing off communications between a primary satellite system (500) and an alternate satellite system (550) determines (602) when a hand-off condition for the primary...
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5912641 |
Indoor satellite cellular repeater system
A satellite repeater system (10) provides a connection from satellites (12) to user terminals (14) that are located within a building. The satellite cellular repeater system receives satellite...
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5841813 |
Digital communications system using complementary codes and amplitude modulation
The encoding/transmission of information in an OFDM system is enhanced by using complementary codes and different patterns of amplitude modulation representing respective data words. The...
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5825325 |
Intersatellite communications systems
An improved multi-beam bent-pipe communications satellite system and method includes a subchannel switching processor for extracting and switching subchannels of information to and from a plurality...
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5812086 |
Method and apparatus for providing duplex communication service in geographical areas where conventional services are obstructed
A system (10) and method delivers geolocation or other signals (26, 28) to a communication unit (24) located within an area (20) (e.g., a building) where an obstruction exists between the signal...
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5640386 |
Two-system protocol conversion transceiver repeater
A system and method are disclosed for bidirectionally coupling a first satellite communication system to a second satellite communication system, wherein the first and second systems operate with...
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5640166 |
Method for compensating for doppler frequency shifts for satellite communication systems
A satellite communication system (100) includes a satellite (102) in a predefined orbit projecting a plurality of beams (1-48) designating a coverage area (115). The satellite (102) has a...
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5638399 |
Multi-beam satellite communication system with user terminal frequencies having transceivers using the same set of frequency hopping
The satellite radio communication system of this invention provides communication between one or more service centers and an ensemble of fixed and mobile user terminals. One or more earth orbiting...
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5627546 |
Combined ground and satellite system for global aircraft surveillance guidance and navigation
The present invention provides a combined ground and satellite system for global aircraft surveillance, navigation, landing guidance and collision avoidance which comprises a satellite subsystem...
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5625363 |
Paging/messaging system using GPS satellites
A paging/messaging system using the L3 transmission channel of a constellation of GPS satellites orbiting the earth, is comprised of an earth-based injection terminal having a source of...
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5594452 |
Method and system for locating an unknown transmitter using calibrated oscillator phases
In a method and system for locating an unknown transmitter which emits an interfering signal, multiple signals, including a phase-calibrating signal and the interfering signal, are simultaneously...
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5583513 |
System and method for generating precise code based and carrier phase position determinations
A GPS system that includes a GPS beacon beacon that receives a plurality of GPS signals. Each of the GPS signals haa a carrier component and a pseudo-random code component. The beacon generates in...
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5563609 |
Antenna system with plural beam sequential offset
An array antenna system (40) has a plurality of radiators (44) for generating a set of beams (48), wherein axes of the beams are spaced apart from each other allowing the respective beams to...
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5550550 |
High efficiency satellite multibeam equally loaded transmitters
A design of equally loaded, under varying traffic load conditions, power amplifiers for a multibeam satellite is presented. Each output beam contains signals of only one beam corresponding to its...
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5455960 |
Low-power access technique for certain satellite transponders
A satellite communications scheme for enhancing the communications system with existing satellites is disclosed. The existing satellites include a transponder having a phase locked loop phase...
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5438337 |
Navigation system using re-transmitted GPS
A system for measuring the relative positions of first and second units includes a re-transmitting apparatus at the first unit and a receiver at the second unit capable of making simultaneous...
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5394156 |
Digital range turn-around for tracking, telemetry and control transponder
A transponder demodulates a phase modulated ranging signal transmitted by an earth station. The transponder converts the analog ranging signal to digital form. The digital ranging signal is...
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5379445 |
Automatic gain control for reducing effects of jamming
Improved automatic gain control for an amplifier is obtained by controlling the size of a null zone in a drive signal for the amplifier. The size of the null zone is controlled by estimating...
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