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6374104 |
Frequency and polarization allocation for satellite telecommunication systems
The invention concerns a telecommunications system in which the Earth is divided into areas ( 26 ) within which communications are effected by means of transmit and receive means on a spacecraft,...
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5867783 |
Medium-earth-altitute satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5826170 |
Satellite communication power management system
Disclosed is a method for operating a communications signal transmitter and apparatus for carrying out the method. The method includes the steps of receiving a communications signal; sensing an...
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5787336 |
Satellite communication power management system
Disclosed is a method for operating a communications signal transmitter and apparatus for carrying out the method. The method includes the steps of receiving a communications signal; sensing a...
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5551624 |
Medium-earth-altitude satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5439190 |
Medium-earth-altitude satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5433726 |
Medium-earth-altitude satellite-based cellular telecommunications system
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5415368 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Medium-earth-altitude satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5415367 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Medium-earth-altitude satellite-based cellular telecommunications system
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5361255 |
Method and apparatus for a high speed asynchronous transfer mode switch
A method and apparatus for a high speed asynchronous transfer mode switch is provided which includes an input buffer circuit coupled to communication lines for receiving and temporarily storing...
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5285208 |
Power management system for a worldwide multiple satellite communications system
A power management system for a worldwide multiple satellite system having satellites positioned latitudinally in a polar orbiting constellation, each satellite having a plurality of antenna beams,...
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5227802 |
Satellite system cell management
There is provided a method and means for controlling the amount of overlap and gaps in coverage of antenna pattern cells of a moving satellite communication system, by determining the relative...
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4698805 |
Console interface for a trunked radio system
A console interface for a trunked communication system is disclosed wherein unique interface modules are coupled to the central controller and console network to establish communication...
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4599619 |
Satellite dual antenna pointing system
A satellite antenna pointing system for separately pointing separated transmit and receive high gain antenna systems includes means for separately and sequentially applying a beacon signal to the...
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4315262 |
Satellite communication system with a plurality of limited scan spot beams
The present invention relates to a satellite communication system comprising a plurality of limited scan spot beams which permits high transponder utilization efficiency by virtue of pooling the...
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4301533 |
Technique for increasing the rain margin of a TDMA satellite communication system
The present invention relates to a technique for increasing the rain margin of a satellite communication system which includes a satellite capable of transmitting multiple concurrent beams...
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4259741 |
Satellite relay system
A satellite relay system for Time Division Multiple Access (TDMA) utilizing a beam scanning technique has been found. According to the present invention a plurality of antennas each relating to the...
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4232266 |
Technique for sharing a plurality of transponders among a same or larger number of channels
A technique is disclosed for sharing a fixed number of identical transponders among a same or greater number of input and output signaling directions by rapidly scanning each transponder over...
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4189675 |
Satellite personal communications system
A communication system is described for providing voice channel communication between any of many thousands of moderate cost and low power mobile stations dispersed over a large area such as the...
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4188578 |
Satellite communication system which concurrently transmits a scanning spot beam and a plurality of fixed spot beams
The present invention relates to a satellite communication system which uses a separate up-link and down-link fixed spot beam for communication with each of a plurality of, for example,...
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4181886 |
Distribution control unit providing simultaneous hybrid FDMA and SS-TDMA operation in a transitional satellite switched system
An SS-TDMA satellite system providing uplink and downlink interconnections through an on-board microwave switching matrix controlled by an on-board distribution control unit responsive to ground...
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4150335 |
Highly reliable distribution control unit with improved control capability
An SS-TDMA satellite system providing uplink and downlink interconnections through an on-board microwave switching matrix controlled by an on-board distribution control unit responsive to ground...
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4144495 |
Satellite switching system
A multi-beam satellite switching system employs onboard switching for the purpose of increasing the up path and down path antenna gains. A multiplicity of up path antenna beams and of down path...
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4135156 |
Satellite communications system incorporating ground relay station through which messages between terminal stations are routed
A satellite relay communications system includes a ground relay station arranged so that each message from one subscriber to another is relayed by the satellite relay to the ground relay, processed...
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4105973 |
Multibeam, digitally modulated, time division, switched satellite communications system
The present invention relates to a multibeam, digitally modulated, time division switched communication system especially for use with a satellite repeater wherein separate up-link and down-link...
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4041397 |
Satellite up link diversity switch
A satellite up link diversity switch system. A beacon or reference signal received from the satellite at two locations separated in an east-west direction. Diversity logic compares the two signals...
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