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7333557 |
Adaptive controller for linearization of transmitter with impairments
An adaptive controller for linearization of transmitters using predistortion of the input signal has reduced sensitivity to impairments such as gain variation, phase noise or...
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7308230 |
Device and method to locally fill gaps in spotbeam satellite systems with frequency re-use
Systems and methods for transmitting and receiving diverse signals across regions using a minimum of frequency capacity and maintaining compatibility with the heritage system. A system of the...
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7266097 |
Communication method and apparatus
A set of formats and protocols is proposed for a satellite communications system. In these formats, a pilot signal (PS) is inserted after every 25 or 29 data symbols. The formats consist of SCPC...
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7181163 |
Multi-beam satellite communications payload with flexible power allocation
A communications payload configuration comprising a multi-port amplifier that incorporates remotely controllable travelling wave tube amplifiers (TWTAs) for allowing their output power to be...
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7170908 |
System and method of selecting sources for a network element having redundant sources
A source selection system for a communication switch for selecting a primary datasource from a plurality of datasources is provided. The system includes a validation module associated with the...
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7164661 |
System and method for providing a two-way satellite system
A two-way satellite communication system is disclosed. A transceiver transmit signals over a return channel to a satellite and receives signals over a downlink channel from the satellite. A hub...
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7103280 |
Architecture for an optical satellite communication network
A satellite constellation has a plurality of satellites. Each of the satellites has an RF ground link for communicating with a ground station and an optical link for communication with at least one...
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7035933 |
System of distributing content data over a computer network and method of arranging nodes for distribution of data over a computer network
The invention is a system for distributing content data over a computer network and a method of arranging receiver nodes in a computer network such that the capacity of the server is effectively...
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7013137 |
Smaller aperture antenna for multiple spot beam satellites
This disclosure describes a method to generate large numbers of spot beams for multiple-beam satellite systems using smaller apertures. This is done by dividing the basic spot beam that has 3 to 4...
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6980531 |
Multiple access spread spectrum switching methodology
A low-cost, low-power, low-complexity, small, high-reliability, robust, seamless satellite communication network is described. The network performs encoding of a user signal at the customer...
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6975600 |
Multimode transmission system using TDMA
A multimode transmission system using TDMA provides a plurality of satellite services to a ground station terminal. These services include timing beacon synchronization, multi-cast/broadcast data...
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6954440 |
Method and apparatus for code division switching
Time division multiplexed input signals (i.e., separated into time slots) are spread in each time slot with a destination code. This spreading is applied for destination identification as opposed...
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6944140 |
Beam hopping self addressed packet switched communication system with multiple beam array antenna
A data routing subsystem ( 200 ) for a communication satellite includes an inbound module ( 602 ) that accepts demodulated uplink data. The inbound module ( 602 ) includes a routing table ( 702 )...
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6836658 |
High data rate satellite communications system and method
A spot beam satellite communications system and method for delivering information to user terminals at a high data rate. In a hub, a high data rate serial data stream is separated into parallel...
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6804492 |
High volume uplink in a broadband satellite communications system
In a communication system with a bandwidth-on-demand processor, which may be power limited and connected to a myriad of terminals via relatively long delay paths, and another processor, which is...
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6795408 |
Networking system for mobile data communications
An improved technique for networking multiple users for retrieving data information from various data sources provides a less costly method for retrieving information while aboard a transportation...
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6757264 |
Satellite communication system for broadcasting audio-visual programs and multimedia data
The system comprises transmitters transmitting programs or multimedia data to a satellite, each program being transmitted on an uplink frequency channel, and program multiplexing means onboard the...
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6724761 |
Method and apparatus for serial cell replication for multicast in a cell switch
A method and apparatus for implementing multicast in a space-based communication system is disclosed. The present invention allows for the use of a buffer in which to store data packets prior to...
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6711407 |
Array of processors architecture for a space-based network router
A space-based network router architecture ( 20 ) is disclosed. The router includes an array-of-processors architecture ( 20 ) for routing uplink and downlink traffic of a communications system ( 10...
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6704297 |
Downlink orderwire integrator and separator for use in a satellite based communications system
A downlink orderwire integrator ( 63 ) and separator ( 81 ) for use in a processing satellite ( 12 ) and a user terminal ( 14 ) in a satellite based communications system ( 10 ) is provided having...
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6625129 |
Demand assigned spatial multiplexing in satellite communication systems
The methods ( 300, 900 , and 1200 ), and apparatus ( 140 and 800 ) of the present invention employ demand assigned spatial multiplexing in a satellite communication system ( 100 ) to efficiently...
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6570859 |
Satellite communication system and satellite for such a system
A satellite communication system having a spatial segment comprising at least one satellite, preferably in a geostationary orbit, carrying a multi-beam telecommunication payload and a terrestrial...
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6496696 |
Real-time CSMA method having the capability to adaptively vary cell sizes and a wireless network for implementing the same
A method in which incoming RF signals to a given node of a wireless network are detected in real-time by using a comparison circuit for comparing a signal which is indicative of the strength of an...
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6459725 |
Wireless repeater with improved diversity
The invention includes methods and systems for use in a wireless communications system, such as a CDMA mobile communications system. A communications device transmits a wireless signal. A repeater...
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6381228 |
Onboard control of demand assigned multiple access protocol for satellite ATM networks
An onboard DAMA protocol for use in connection with a processing satellite communications network, where multiple users are assigned to a common transmission resource as part of a sharing set. A...
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6341213 |
Dynamic repeater configuration for multilink satellite systems with robust subchannel interconnect capability
A dynamic repeater configuration for satellite systems is disclosed that allows for multiple broadcast of channel information and multiple subchannel allocations on uplink and downlink beam...
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6301225 |
Configurable communication apparatus that permits use of unused multiplexer channels when operating in high power mode
Redundancy ring communication apparatus having a plurality of communication channels, that comprises normally used and redundant amplifier channels that are interconnected using selectively...
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6295282 |
Calibrated low loss radio frequency switch matrix
A system for switching radio frequency signals from an input side (5, FIG. 1 ) to an output side (6) can be used to combine multiple input signals to form a single output and to distribute a single...
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6266329 |
Regional programming in a direct broadcast satellite
A multi-beam DBS satellite system capable of providing spectrally efficient regional programming is disclosed. The inventive system includes at least one DBS satellite having a repeater connected...
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6240102 |
System for routing a UBR connection
An exchange constituting an ATM network administers the number of UBR connections for every line port included in the exchange. Upon receiving a request for setting a UBR connection, the exchange...
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6229986 |
Reconfigurable analog channel processor for multibeam satellites
An analog transponder processor for use in a multibeam satellite receiving input beam signals and transmitting output beam signals has an input switch matrix, channel processors, and an output...
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6178163 |
Optimal packet routing method and system for low earth orbit satellite communication system
In a LEO satellite system with the implementation of a virtual network, a method and a system are proposed for arranging an optimal route for data packets to travel. The method and system will...
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6147980 |
Avionics satellite based data message routing and delivery system
A data message routing and delivery system for an air traffic control system includes a communications network with one or more ground processing nodes, one or more satellite processing nodes, and...
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6144654 |
Method of combining and separating groups of multiple CDMA-encoded data signals and apparatus therefor
A method and apparatus for combining and separating groups of signals starts by a transmitter (500) receiving a number of CDMA-encoded signals from data sources (510). The CDMA-encoded signals are...
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6108318 |
System and method for data link synchronization
A system and method for improving communication between two user terminals in a telecommunication system is disclosed. When two user terminals, such as in a satellite-based system with a...
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5982756 |
Satellite communications systems using a cross-connect switch
Each of the communications satellites going around the earth is equipped with a plurality of transmitters and receivers including receiving antennas in order to be able to transmit and receive...
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5924014 |
Method and apparatus for adaptive routing in a satellite-based communication system
In satellite based communication systems (30), real time monitoring of communication links (23-25) and the subsequent adaptations to overcome problems with certain links (23,25) provides the...
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5870377 |
Satellite communications systems using a cross-connect switch
Each of the communications satellites going around the earth is equipped with a plurality of transmitters and receivers including receiving antennas in order to be able to transmit and receive...
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5822312 |
Repeaters for multibeam satellites
A repeater for a multibeam communications satellite combines the features of coaxial channel interbeam switching and subchannelization of some of the channels. In one embodiment described, the...
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5815527 |
Method and apparatus for switching spread spectrum/code division multiple access modulated beams
Switching of traffic channels within spread spectrum beams is performed in a satellite without buffering of the individual signals. Individual satellite beams carrying spread spectrum user RF...
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5796715 |
Non-blocking dynamic fast packet switch for satellite communication system
The present invention overcomes the limitations encountered by conventional packet switching using virtual circuits. The present invention utilizes a "datagram" approach that routes every packet...
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5790529 |
Communications network node with switched channelizer architecture
A communications network (10) includes nodes (18) in which switched channelizers (32) decompose wideband signals into narrowband signals and route the narrowband signals to specified demodulators...
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5642358 |
Multiple beamwidth phased array
A system for wireless communication between at least one first station and a plurality of second stations using a relay station is disclosed. The relay station contains, among other features, an...
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5566168 |
TDMA/FDMA/CDMA hybrid radio access methods
A radio access method for facilitating communication between at least one first station and a plurality of second stations is disclosed. First, each signal intended for transmission is buffered at...
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5499237 |
Waste canceling packet routing system and method
In a system that includes a constellation of satellite communication nodes, information packets are routed through the constellation using routing tables stored in each communication node. The...
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5274627 |
Non-regenerative multibeam satellite communications system with FDMA access and SSTDM connectivity
An apparatus and method for a non regenerative multibeam communications system with FDMA access and SSTDM connectivity. In accordance with the present invention, FDM input signals are transformed...
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4931802 |
Multiple spot-beam systems for satellite communications
On-board satellite switching is performed in three stages, an outer stage of switching on the up-link side for routing the received signals to either demodulators or frequency translators, a first...
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4926422 |
On-board switching controller for a satellite with on-board switching
A controller is provided for a baseband switching matrix with one space switching stage. The matrix supplies the controller with a number of service channels (IOTS, CH) of the uplink frames, which...
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4901310 |
Mobile satellite communication system
A satellite communication system includes a plurality of mobile stations which are situated on the earth and a communication satellite which is communicable with the mobile stations by radio...
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4858225 |
Variable bandwidth variable center-frequency multibeam satellite-switched router
Reconfigurable switching router connects to an existing connectivity network on board a multibeam communications satellite for increasing the flexibility thereof by providing variable bandwidth...
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