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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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7610064 |
Direct downlink RF module
A downlink module is provided that includes a sensor interface operable to provide digital sensor signals. It also includes a GPS receiver for receiving GPS timing and location signals. The...
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7606567 |
Channel allocation for burst transmission to a diversity of satellites
A method for allocating transmission channels to devices configured to communicate short data packets to a diversity of non geostationary satellites is disclosed hereby. The method suggests a...
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7551124 |
Method for optimising at least one property of a satellite system, optimisation device for a satellite system, satellite receiver and satellite system
A method for optimizing at least one property of a satellite system. The system has a satellite provided with a transmitter for transmitting a satellite signal that represents data. The satellite...
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7545315 |
Satellite with multi-zone coverage obtained by beam deviation
A telecommunication satellite with multi-zone coverage, including at least one transmission and/or reception antenna with at least one transmission and/or reception source (C, R), for the provision...
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7522939 |
Radio communication apparatus
A radio communication apparatus includes a received beam generating section 12 for generating received beams beam 0 and beam 1 , which are perpendicular to each other and spatially separated, by...
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7522102 |
Antenna beam steering
An antenna steering system is provided that includes a plurality of gyro sensors fixedly located in close proximity to an antenna, for example a phased array antenna. The gyro sensors measure...
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7505843 |
Vehicle safety apparatus
When a detection unit ( 3 ) detects an approach of an object to a vehicle in which a vehicle safety apparatus is mounted, a main controller ( 2 ) determines whether a positional relationship...
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7486224 |
Microwave and millimeter frequency bistatic radar tracking and fire control system
A bistatic passive radar system for tracking at least one target utilizing means for transmitting radar signals from at least one satellite platform in a geosynchronous orbit with the earth, means...
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7472409 |
System for access to direct broadcast satellite services
A system for receiving direct broadcast satellite signals in a mobile craft is disclosed. Generally, the system includes an orientation system for determining the first orientation of the mobile...
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7447170 |
Digital beacon asymmetry and quantization compensation
A method, apparatus for reducing errors in a plurality of beacon beams is disclosed. The method comprises the steps of computing quantized channel weights {tilde over (W)} c from channel weights W...
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7426386 |
Beam laydown for hopped satellite downlink with adaptable duty cycle
A power gated variable hop cycle beam laydown ( 700 ) manifests itself as first cells (C, D) supported by a first hop cycle, second cells (G, H) supported by a second hop cycle, and transition...
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7423587 |
Method for frequency-driven generation of a multiresolution decomposition of the input to wave-based sensing arrays
A method for generating a multiresolution decomposition of an array signal by a bank of spatial bandpass filters is disclosed. The signal processing operation is implemented through the use of the...
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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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7330151 |
Alignment of an elliptical beam of an antenna
A system and methods for aligning an elliptical beam of an antenna to a line-of-sight from the antenna to a remote receiver are disclosed. The methods offset the antenna from an initial pointing...
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7324817 |
Wireless communication method and apparatus for selecting and reselecting cells based on measurements performed using directional beams and an omni-directional beam pattern
A wireless communication method and apparatus for selecting and reselecting cells used by a wireless transmit/receive unit (WTRU) in a wireless multi-cell communication system. The WTRU includes a...
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7315279 |
Antenna system for producing variable-size beams
An antenna system has multiple antenna feed elements combined in a number of element sets independently controlled to provide a beam of a variable size. Multiple input power dividers are provided...
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7308264 |
Method for identifying pre-candidate cells for a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system
Measurements for identifying pre-candidate cells are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam...
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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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7268726 |
Method and apparatus for correction of quantization-induced beacon beam errors
A method of correcting for beacon pointing errors is disclosed. A desired beacon value and a predicted measured beacon value are computed and used to generate the beacon correction. An antenna...
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7242904 |
Dual-band multiple beam antenna system for communication satellites
A dual-band multiple beam antenna system for a communications satellite sharing a set of reflector antennas for the transmit and receive frequencies. One set of reflectors is common to both the...
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7221317 |
Space-based lever arm correction in navigational systems employing spot beams
A method and apparatus for estimating a lever arm correction between the wide beam antenna and the spot beam antenna in a navigational satellite system is disclosed. A prescribed satellite maneuver...
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7221316 |
Control segment-based lever-arm correction via curve fitting for high accuracy navigation
A method and apparatus for estimating a lever arm correction between the wide beam antenna and the spot beam antenna in a navigational satellite system is disclosed. A prescribed satellite maneuver...
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7206608 |
System and method for scheduling transmission from multiple-beam transmitters
Systems and methods for scheduling transmissions from multi-beam transmitters to sets of receivers are provided. An angle of departure is determined for each of the receivers, and the transmissions...
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7190957 |
Base station connection method, radio network controller, and mobile station
A method for connecting the radio link between a mobile station and a base station is provided to improve quality of received signals at the base station and the mobile station. A radio network...
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7129889 |
User segment-based lever arm correction via prescribed maneuver for high-accuracy navigation
A method and apparatus for computing a lever arm correction between a wide beam coverage antenna and a steerable spot beam antenna of a navigational satellite is disclosed. A navigation receiver...
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7123876 |
Easy set-up, vehicle mounted, in-motion tracking, satellite antenna
A low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform. Each antenna assembly includes two...
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7110716 |
Dual-band multiple beam antenna system for communication satellites
A dual-band multiple beam antenna system for a communications satellite sharing a set of reflector antennas for the transmit and receive frequencies. One set of reflectors is common to both the...
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7107012 |
Radio base station for wirelessly communicating with a radio terminal
A radio antenna of a radio base station is a directional antenna. The antenna searches for a peripheral radio base station by changing the directivity of the antenna. An operating channel and...
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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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6993288 |
Managing satellite fixed beam uplink using virtual channel assignments
A method of coordinating communications between ground stations and fixed beam satellites is provided, wherein each beam of a satellite antenna is assigned a color to create a color pattern that...
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6989786 |
Satellite antenna station keeping
Techniques for redirecting a satellite antenna beam from a satellite antenna of a satellite in an inclined orbit to a preferred satellite antenna beam pointing position on the earth are provided....
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6972724 |
Self-correcting mobile antenna control system and method
A self-correcting mobile antenna control system and method. A method is provided for controlling the direction of an antenna mounted on a vehicle. The method includes determining a position...
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6936760 |
Space-based power system
A space-based power system. The system maintains proper positioning and alignment of system components without using connecting structures. Power system elements are launched into orbit, and the...
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6930636 |
Method of acquiring satellite attitude
Methods and structures are provided for reducing pointing errors ζ of satellite antennas and for generating broad field-of-view satellite attitude acquisition patterns. In one method embodiment,...
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6914557 |
Micro cell architecture for mobile user tracking communication system
A system and method for tracking a user. The system is adapted for use in a wireless communication system and creates a plurality of beams within a coverage area. A first beam is directed at a user...
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6911938 |
Transmit-receive multibeam telecommunications system with reduced number of amplifiers
This invention reduces the number of amplifiers needed and thus reduces the weight of a multi-beam transmitting system. Each input beam is connected respectively to each switched terminal of an...
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6862271 |
Multiple-input, multiple-output (MIMO) systems with multiple transmission modes
Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These...
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6853333 |
Downlink load sharing by beam selection
The beam pattern associated with a multi-beam antenna array is adjusted if a first beam of the beam pattern is overloaded. A lobe of a second beam of the beam pattern can be steered away from a...
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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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6825806 |
Satellite methods and structures for improved antenna pointing and wide field-of-view attitude acquisition
Methods and structures are provided for reducing pointing errors ζ of satellite antennas and for generating broad field-of-view satellite attitude acquisition patterns. In one method embodiment,...
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6822579 |
Steerable transceiver unit for downhole data acquistion in a formation
A method and apparatus for collecting data downhole in a well bore, even during drilling operations, are disclosed. The apparatus generally comprises an antenna and some associated electronic...
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6781968 |
Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline
A system, apparatus and method provide wireless communications to a geographical area. The system includes at least one atmospheric platform serving as a central relay or node using a star network...
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6759978 |
Cross-link antenna system
A cross-link antenna system including a plurality of spacecraft in a constellation is provided. Each of the spacecraft includes an antenna. One or more of the antennas has a number of antenna...
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6756937 |
Stratospheric platforms based mobile communications architecture
A communication system including a first transceiver located on a first platform at a predetermined altitude. A first antenna is located on the first platform and connected to the first...
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6731240 |
Method of tracking a signal from a moving signal source
A method of tracking a signal from a moving signal source including commanding angular offsets to control an antenna to track a signal from a moving signal source taking into consideration...
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6727425 |
Power generation satellite and transmission antenna apparatus
High-output transmitters are applied to a power generation satellite and a transmission antenna apparatus and a transmission antenna having an array antenna with a small number of element antennas...
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6725013 |
Communication system having frequency reuse in non-blocking manner
A communications system ( 10 ) and method of operating the communications system includes a high altitude communication device ( 12 ) that communicates with a plurality of user terminals and a...
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6723912 |
Space photovoltaic power generation system
A power generation satellite has a photoelectric conversion unit for converting sunlight into electric energy, a transmission frequency conversion unit for performing frequency conversion of the...
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6720918 |
Antenna distortion estimation and compensation
A thermal distortion estimation system for delivering thermal time varying distortion of various spacecraft antenna is provided which includes a measurement signal outage indicator and a storage...
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