Matches 151 - 200 out of 448 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
6813476 Method and system for compensating for atmospheric fading in a communications system  
A method and system for compensating for atmospheric fading is used in a communication system wherein communication signals are exchanged between first and second earth stations via a satellite...
6807158 Method and apparatus for determining position and trajectory of gateways to optimize performance in hybrid non-terrestrial-terrestrial multi-hop mobile networks  
A wireless hybrid network consisting at least one satellite 118 and a plurality mobile ad hoc nodes 104 . The nodes 104 are assumed to be clustered into mobile groups 102 within the...
6807397 Method for identifying growth limits of handheld services for mobile satellite communications  
Methods for increasing the efficiency of satellite constellation operations are disclosed. The steps of the present invention comprise calculating the maximum number of communications signals that...
6804493 Mobile surface terminal communication system  
A command and telemetry communication system includes a downlink subsystem having a spacecraft downlink transmitter communicating a quadrature component carrying a pilot code for coarse acquisition...
6795685 Method and apparatus for repeater priority resolution in a wireless communication system  
A repeater unit ( 202,204 ) operates in a multi-channel wireless communication repeater system and maintains a priority state ( 216 ) for the repeater unit ( 202,204 ). The repeater unit ( 202,204...
6795687 Elliptical satellite system emulating characteristics of geosynchronous satellites during the apogee portion of an elliptical orbit  
An array of satellites which is virtually geosynchronous. Each satellite is in an elliptical orbit. The apogee portion of each elliptical orbit is over one of the regions of interest. Each...
6795699 Geolocation techniques for an airborne cellular system  
A method of locating a billing area associated with a cell phone call initiated in an airborne cellular communications system enables service providers to more accurately identify system user...
6785510 Routing in a multi-station network  
A method of relaying data between mobile stations in a cellular communications system is provided. The system comprises a number of mobile stations and base stations. Each base station makes...
6782248 Frequency scalable, low self-generated noise frequency source  
A frequency scalable, low self-generated noise frequency source generates coherent or mostly-coherent local oscillator signals and includes a common reference, a coherent set of high frequency...
6775251 Satellite communication system providing multi-gateway diversity and improved satellite loading  
A method includes steps of (a) establishing a call connection between a terrestrial telecommunications network and a user terminal via a first gateway and at least one satellite, (b) while the call...
6768906 System and technique for plane switchover in an aircraft based wireless communication system  
An aircraft based communication system ( 10 ) defining a wireless service area ( 20 ) is disclosed. The communication system ( 10 ) includes a communication gateway ( 30 ) connected to a...
6754489 Node and onboard station for setting up at any time a call involving a passenger on a vehicle  
Passengers on board a vehicle make and receive calls via a satellite network. That network sees each passenger involved in a call as a temporary dummy subscriber of the satellite network. Thus the...
6748194 Repeater system having oscillation preventing function and automatic reverse output disabling function for non-subscriber and control method thereof  
Disclosed is a repeater system having an oscillation preventing function and an automatic reverse output disabling function, and a control method thereof, in which the reverse output of the...
6745005 Method and apparatus for reducing signal interference in satellite broadcast systems employing terrestrial repeater stations  
A method and apparatus for reducing deep fading of signals in satellite-based communications systems employing terrestrial repeater stations by shifting the phase of the signals transmitted from...
6745006 Communication system utilizing a constellation of satellites and method therefor  
A communication system ( 20 ) utilizing a constellation ( 22 ) of satellites ( 24 ) is presented. A source ground station ( 52 ) transmits an uplink signal ( 34 ) containing source payload data (...
6738598 Multilayer radio frequency interconnect system  
A multilayer radio frequency interconnect apparatus includes a plurality of laminated printed wiring boards made of a dielectric material with low loss characteristics for radio frequency...
6731904 Side-to-side repeater  
A modular repeater includes a housing having a pair of substantially 180° oppositely facing surfaces. At least one antenna element is mounted to each of these surfaces for radiating energy in a...
6728514 Scalable wireless network topology systems and methods  
Wireless broadband data access is provided to and from a plurality of locations distributed randomly over a large geographic area. The network can be deployed one node at a time, with a new node...
6728650 High power amplifier operating point determination apparatus and method for satellite communications system  
A high power amplifier operating point determination apparatus and method determines an operating point of a high power amplifier for satellite communications system. For the purpose, the apparatus...
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...
6725035 Signal translating repeater for enabling a terrestrial mobile subscriber station to be operable in a non-terrestrial environment  
The signal translating repeater is located in the aircraft and enables a traditional ground-based mobile subscriber station to provide wireless telecommunication services to a subscriber in both...
6725034 Method for synchronizing a space telecommunications system comprising at least one satellite  
The invention relates to a method for synchronizing a space telecommunications system comprising at least one satellite and several user terminals, each satellite comprising: off-line and real...
6714762 Radio communication system, radio communication method, and recording medium for storing a program for selection of a repeater in radio communication system  
A radio communication system of this invention includes: terminals for sending a connection request through broadcast, detecting a reception condition when a connection request echo sent back is...
6711409 Node belonging to multiple clusters in an ad hoc wireless network  
A communication system has stations arranged in clusters of member stations, each of which communicates with the other member stations. One member station is a head station of the cluster that...
6704544 Multi-spot-beam satellite system with broadcast and surge capacity capability  
A payload design for a multi-spot-beam satellite communication system includes a plurality of uplink spot beam receivers and downlink spot beam transmitters, and a broadcast transmitting subsystem...
6704543 Multi-beam satellite communications system  
A satellite communications system having ground user terminals, hubs, and a geosynchronous satellite. The satellite generates a network of spot beam coverage areas on the earth. A hub and at least...
6701127 Burst communications method and apparatus  
A transmitter ( 400 ) offsets the transmission time and frequency of a burst transmission such that uncertainties in reception time and reception frequency are reduced. The transmitter includes an...
6697603 Digital repeater  
A method of using a digital repeater for receiving and retransmitting radio frequency (RF) signals. The method including down converting a first RF signal to an intermediate frequency (IF) signal,...
6690934 Multiple access satellite communications network  
A shared single system of ground stations ( 120 ) for servicing any number of satellite owners, permits the owners to transfer command information to their satellite ( 110 ), and collect data...
6687308 Signal processing apparatus and signal processing method  
The display section 35 connected to a control section 31 displays, at the same time, both the contents described in the network information table of the digital broadcast data demodulated by a...
6684056 System for providing optimal satellite communication via a MEO/LEO satellite constellation  
A method of increasing satellite communication quality by using a MEO satellite constellation ( 12 ) and a LEO satellite constellation ( 14 ) in combination with a decision algorithm which selects...
6678520 Method and apparatus for providing wideband services using medium and low earth orbit satellites  
A method and apparatus for mitigating communications interference between satellite communications systems in different orbits is disclosed. The method comprises the steps of evaluating a...
6675007 Charging method and terminal equipment in the information and communication network system  
A charging system for use in a network composed of wireless terminals with a repeater function. As each terminal with a repeater function receives a communication session start request from a user...
6675013 Doppler correction and path loss compensation for airborne cellular system  
The present invention corrects for Doppler shift in both forward and reverse links in a cellular communications system including an airborne repeater. A reverse link pilot reference signal in a...
6654358 Method for transmitting power control signal in mobile communication system  
A method for transmitting a power control signal in a mobile communication system. By altering the power control subchannel, the method reduces the delay between power measurement and power control...
6654357 Satellite repeater diversity resource management system  
A satellite communications system ( 10 ) has a controller for improving and optimizing the delivery of path diversity in a satellite repeater-based communication system, thereby conserving both FDM...
6636734 Dual receive ground terminal for use in communication systems utilizing multiple satellites  
A ground terminal renders feasible a communications system that locates two satellites at the same node along the geostationary arc. Each satellite is capable of receiving RF signals through an...
6633745 Satellite cluster comprising a plurality of modular satellites  
A satellite cluster and method for operating the same. A first module satellite has as a pay load component a receiver unit and/or a transmitter unit for communication with subscriber stations...
6628922 Communication system utilizing multiple satellites without intersatellite crosslinks  
A communications system includes two satellites located at the same node along the geostationary arc each capable of receiving RF signals through an uplink channel and transmitting RF signals...
6622007 Datacast bandwidth in wireless broadcast system  
A network datacast system includes a plurality of transmission facilities. Each transmission facility receives primary programs from one or more media studios. Each transmission facility also...
6618690 Generalized positioning system based on use of a statistical filter  
A generalized positioning system, corresponding method, and filter for use in the generalized positioning system, based on Kalman filtering or any other kind of filtering that produces an estimate...
6609002 Method and apparatus for predictive QoS routing for broad band low earth satellite networks  
A predictive routing scheme for broad band Low Earth Orbit (LEO) satellite constellations is presented. The predictive routing scheme may be used to provide Quality of Service (QoS) guarantees for...
6603957 Static and dynamic partnering schemes for satellite cross-links  
The present invention provides a method and apparatus for establishing a partnering scheme having dynamic cross-links between satellites of a satellite communication system that are travelling in...
6597892 Automated ground system with telemetry initiated command assistance  
A ground-control system for a fleet of satellites provides a highly reliable means that automatically recognizes undesirable telemetry state changes and automatically transmits the required...
6587692 Location determination using weighted ridge regression  
Weighted ridge regression (WRR) processing is applied to three or more distance measurements to determine the location of a terminal. For example, in an integrated satellite-based navigation...
6577847 Satellite communication system with multiple variable data rate carrier  
Described is a satellite communication system 1 comprising a primary station 2 , a communication satellite 3 and at least one secondary station 4 . The primary station 2 transmits data...
6570858 Satellite-based communications system with terrestrial repeater and method therefor  
A satellite-based communications system ( 20 ) includes a communication satellite ( 22 ) using a Time Division Duplex (TDD) frame structure. The communication satellite ( 22 ) transmits first data...
6564053 Efficient high latitude service area satellite mobile broadcasting systems  
Satellite audio broadcasting systems include orbital constellations for providing high elevation angle coverage of audio broadcast signals from the constellation's satellites to fixed and mobile...
6560440 Method for precompensating frequency data for use in high-velocity satellite communication systems  
A satellite vehicle compensation system ( 100 ) predicts the motion of two satellite vehicles and enhances the predictions with real-time updates of one or both of the vehicles. Using feedback...
6556808 Fixed ground track satellite constellation and user terminal  
A satellite communication system includes a constellation of non-geostationary orbiting satellites following a fixed ground track on the earth, and ground terminals having substantially continuous...
Matches 151 - 200 out of 448 < 1 2 3 4 5 6 7 8 9 >