| Entries |
| Document | Title | Date |
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| 20130029593 | Method for Propagating Messages in a Communication Network to a Satellite Network - A method is provided for propagating messages in a communication network to a satellite network, the communication network being made up of a set of users and the satellite network comprising at least one satellite, the set of users comprising a sender and a recipient, said recipient being intended to send to the satellite network an initial message originating from the sender, at least one satellite of the satellite network being visible to said recipient, in which each user determines a number of intermediaries needed to reach the recipient and periodically sends a message comprising said number of intermediaries needed to reach the recipient, and said initial message being sent by the sender to the visible user having the lowest possible number of necessary intermediaries, called optimal intermediary, said optimal intermediary becoming, in turn, sender and sending the initial message, the operation being repeated until the recipient is reached. | 01-31-2013 |
| 20120184208 | Virtual Polar Satellite Ground Station for Low Orbit Earth Observation Satellites Based on a Geostationary Satellite Pointing an Antenna Over an Earth Pole - A satellite system includes a satellite operating in an orbit around the Earth and a satellite operating in another orbit around the Earth. The satellite points a fixed beam at least temporarily to a zone above the Earth's surface through which the satellite passes. | 07-19-2012 |
| 20090191810 | SATELLITE COMMUNICATION SYSTEM - When a transmission request for new data is issued under a situation where a plurality of data are transmitted to a specific service area from a plurality of service areas, a feeder link station searches an available frequency to be allocated to the new data in a down-link frequency band of the specific service area, and when any of data communications is completed, allocates a down-link frequency band used in the data communication as a down-link frequency band for the new data. A satellite repeater arranges the new data on the down-link frequency band right after the data communication is completed following a relay control by the feeder link station. | 07-30-2009 |
| 20100159826 | Radio Frequency Circuit for a Wireless Signal Transceiver and Related Wireless Signal Transceiver - A radio-frequency circuit for a wireless signal transceiver is disclosed. The wireless signal transceiver is utilized for receiving a first wireless signal and transforming the first wireless signal into a second wireless signal. The radio-frequency circuit includes a transmission line including a first end and a second end, a reception antenna coupled to the first end of the transmission line for receiving the first wireless signal, a transmission antenna coupled to the first end of the transmission line for emitting the second wireless signal, a first filtering circuit coupled between the second end of the transmission line and the wireless signal transceiver for filtering out the first wireless signal, and a second filtering circuit coupled between the second end of the transmission line and the wireless signal transceiver for filtering out the second wireless signal. | 06-24-2010 |
| 20100105318 | FREQUENCY TRANSLATION MODULE INTERFACE - An architecture and protocol enables signal communications between either a frequency translation module and a decoder within a dwelling, or between an antenna and a decoder within a dwelling. According to an exemplary embodiment, the decoder comprises a switch | 04-29-2010 |
| 20120225620 | ADAPTIVE DATA RATE CONTROL FOR NARROWCAST NETWORKS - A system to provide narrowcast communications uses adaptive data rate control to individual subscribers such that the effects of precipitation or other link conditions, which are not common to all subscribers, is mitigated. The invention takes advantage of the fact that the narrowcast data consist of packets which are individually addressed to specific subscribers, or groups of subscribers. The narrowcast data is communicated on a plurality of channels, each of potentially differing data rates. The subscribers are assigned a particular channel, based upon their link quality, to receive packets addressed to them. The lower data rate channel will be less affected by adverse link conditions and are hence assigned to subscribers most likely to incur adverse link conditions. | 09-06-2012 |
| 20090264066 | Circular polarized repeater and transmission method thereof - A circular polarized repeater includes a circular polarized receiving antenna for receiving a circular polarized signal, an amplifying circuit electrically connected to the circular polarized receiving antenna which is provided for amplifying the received signal, a circular polarized emitting antenna connected to the amplifying circuit for outputting the amplified signal. The circular polarized repeater is used for a transmission system and the signal is received and then outputted to a predetermined area by the circular polarized repeater so as to improve the quality and efficiency of the system. | 10-22-2009 |
| 20130115874 | Multi-spot satellite surveillance system and reception device - A system for surveying aircraft present in an area covered by at least one communication satellite, the aircraft transmitting signals conveying surveillance messages. The coverage area consists of multiple spots, the satellite is configured to periodically apply a switching sequence, the sequence consisting of multiple switching phases, a switching phase corresponding to a duration during which the signals transmitted by the aircraft present in at least one spot are processed by the satellite in such a way as to detect surveillance messages, and the sequence is adapted to allow for the detection, during a predetermined period Tup, of at least one surveillance message by aircraft present in the coverage area. | 05-09-2013 |
| 20090011703 | Global Information and Hazard Warning System Using Satellite Navigation Systems and User Terminals - A method and device for a global information and early warning system, based on satellite navigation systems and user terminals, comprising the following steps and/or devices for carrying out this step: transmitting at least one warning message about one or more hazard area(s) by way of a satellite navigation system to user terminals in at least one information coverage area; receiving at least one warning message by means of a user terminal in the at least one information coverage area; and checking the warning message by means of the user terminal whether the user terminal is affected by the warning message. | 01-08-2009 |
| 20100279604 | Intersatellite Links - A first satellite and a second satellite are deployed in a cluster in closely related orbits around the Earth. The second satellite has at least one light emitting diode (LED) configured to transmit optical signals to the first satellite to enable an intersatellite link (ISL) between the first and second satellites. | 11-04-2010 |
| 20110143657 | METHOD OF ESTABLISHING COMMUNICATION LINK BETWEEN A MOBILE EARTH STATION AND A SATELLITE OF MSS AND APPARATUS THEREFOR - Provided is an MSS satellite system including a satellite, an ATC and an MES. The satellite transmits a signal of a frequency for FSS to the ATC and transmits a signal of a frequency for MSS to the MES. When the strength of the signal transmitted from the satellite is equal to or greater than a reference value, the MES receives the transmitted signal. When the strength of the signal is less than the reference value, the MES transmits the position coordinates and speed information of the MES together with information transmission request, to the ATC. The ATC applies a beam-forming algorithm by using the position coordinates and speed information of the MES and transmits a directivity-enhanced signal to the MES which requests information transmission. | 06-16-2011 |
| 20110028086 | SYSTEM AND METHOD FOR ENABLING ULTRA SMALL APERTURE COMMUNICATION ANTENNA USING SPECTRAL REPLICATION AND COHERENT FREQUENCY AND PHASE COMBINING - A satellite communications system has a hub terminal which communicates with a remote terminal through a satellite. The hub terminal | 02-03-2011 |
| 20110287711 | DEVICE FOR FLEXIBLE WIDEBAND FREQUENCY TRANSPOSITION, AND ASSOCIATED SATELLITE REMOTE CONTROL RECEIVER - A device for double frequency transposition includes means for controlling the frequencies F | 11-24-2011 |
| 20100136901 | ASSEMBLY OF A LOW-NOISE BLOCK CONVERTER AND A FILTER FOR A SATELLITE ANTENNA SYSTEM, AND CONNECTING COMPONENT THEREOF - An assembly of a low-noise block converter and a filter for a satellite antenna includes a low-noise block converter, a filter, and a connecting component. The low-noise block converter includes an output circuit, and the filter includes a filtering circuit. The connecting component includes a sleeve part for engaging threadedly the low-noise block converter and the filter, and a core extending through the sleeve part and interconnecting electrically the output circuit and the filtering circuit. By virtue of the sleeve part of the connecting component, connection between the low-noise block converter and the filter can be reinforced to reduce interference. The sleeve part can also serve as aground circuit between the low-noise block converter and the filter so as to shorten a ground path, thereby reducing signal loss. | 06-03-2010 |
| 20090298422 | Calibration Using Noise Power - A method calibrates a spread spectrum receiver having a received signal strength below a noise floor. The method includes estimating an input noise power, and measuring a noise power output from the receiver. The method also includes comparing the estimated input noise power with the measured output noise power to determine at least one calibration value. The method further includes calibrating the receiver based upon the at least one calibration value. | 12-03-2009 |
| 20100081373 | SATELLITE FEED ASSEMBLY WITH INTEGRATED FILTERS AND TEST COUPLERS - A dual-band feed assembly is configured to be coupled to a satellite repeater payload. The dual-band feed assembly includes a transmit filter assembly comprising a transmit pass-band filter configured to reject frequencies outside of a transmit frequency band and a low-pass and harmonic filter configured to reject receive band frequencies and harmonics of the transmit frequency band. The dual-band feed assembly further includes a receive filter assembly comprising a receive pass-band filter configured to reject frequencies outside of a receive frequency band and a high-pass filter configured to reject transmit band frequencies. A multi-port junction couples the transmit and receive waveguide assemblies to a dual-band horn. The dual-band feed assembly also may include receive and transmit test couplers. | 04-01-2010 |
| 20100120359 | APPORTIONED CARRIER GROUP SLOT PLACEMENT FOR A SATELLITE COMMUNICATIONS SYSTEM - Satellite communications systems, methods, and related devices are described. In one embodiment, a satellite communications system is configured to dynamically allocate bandwidth and frequencies among different beams. Bandwidth request data may be received and compiled from the terminals. The satellite may be configured with different beam coverage areas, and may dynamically allocate bandwidth and particular frequency channels to different beam coverage areas based on the requests. In each of a series of one or more epochs, and according to the bandwidth requests, there may be allocations among carrier groups, traffic classes, and particular terminals. The setup of slot structure and selection of modes for particular terminals is also addressed. | 05-13-2010 |
| 20090170428 | Methods of Reducing Interference Including Applying Weights to Provide Correction Signals and Related Systems - Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed. | 07-02-2009 |
| 20120295537 | RECONFIGURABLE SATCOM AVIONICS RADIO - In one embodiment, a main radio unit for an avionic communication system is provided. The main radio unit includes a software defined radio (SDR) configured to simultaneously provide at least one safety certified channel for a cockpit of an aircraft and at least one other channel for cabin services of the aircraft, wherein the SDR is configurable such that the SDR can generate signals corresponding to different communication protocols. The main radio unit also includes an interface for the at least one safety certified channel, wherein the interface is configured to convert signals between a protocol for hardware in the cockpit and a satellite communication protocol used by the SDR for the at least one safety certified channel; and wherein the SDR is configured to communicate with an RF unit for transmission and reception of signals over an antenna. | 11-22-2012 |
| 20090286472 | Multi-Rate Downstreaming in Multiple Sub-Channel Environment - An embodiment of a satellite system for broadband communication with a plurality of remote locations is disclosed. The satellite system includes a satellite, a number of service spot beams from the satellite and a number of forward channels. Each of the number of forward channels is transported on a carrier in one of the plurality of service spot beams. The number of forward sub-channels pass on one of the number of forward channels. The size of the forward sub-channels varies over time. | 11-19-2009 |
| 20090291633 | FREQUENCY RE-USE FOR SERVICE AND GATEWAY BEAMS - A method is presented for communicating data in a multibeam satellite system utilizing frequency re-use. The method comprises establishing uplink service beams and downlink service beams between a satellite and a plurality of subscriber terminals. A plurality of the uplink service beams are transmitted to the satellite by re-using at least one common uplink frequency channel, and a plurality of the downlink service beams are transmitted from the satellite by re-using at least one common downlink frequency channel. The method further comprises establishing at least one uplink service beam and at least one downlink service beam between the satellite and a gateway terminal. The at least one uplink service beam is transmitted to the satellite by further re-using the at least one common uplink frequency channel, and the at least one downlink service beam is transmitted from the satellite by further re-using the at least one common downlink frequency channel. | 11-26-2009 |
| 20090170427 | Methods of Reducing Interference Including Determination of Feeder Link Signal Error and Related Systems - Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed. | 07-02-2009 |
| 20100136902 | Signal Power Summation Using Satellite Transponders Having Orthogonal Polarizations - A method for communication includes transmitting first and second copies of a signal toward first and second satellite transponders, respectively, so as to cause the first and second satellite transponders to transmit respective first and second downlink signals with mutually-orthogonal linear polarizations toward a coverage region. A correction is applied to at least one of the first and second copies before transmitting the first and second copies. The correction is selected so as to remove a frequency offset between the first and second downlink signals and cause the first and second downlink signals to have a constant phase offset in at least some of the coverage region. | 06-03-2010 |
| 20110207398 | Method of Recovering a Signal from a Set of Signals Collected by Satellite - A method of recovering a useful signal received by a satellite includes a step of reception by the satellite of a composite signal comprising said useful signal and collision signals, all of these signals being received simultaneously by the satellite, interfering with each other, and respectively being transmitted by transmitters. The method includes the steps of: direct reception, by at least one station of a terrestrial network, of signals corresponding to at least a non-zero portion of said collision signals and referred to as collected collision signals; for each collected collision signal, estimation, by a processing unit connected to the terrestrial network and to the satellite, of the collision signal received by the satellite as a function of (i) the collected collision signal received directly by the terrestrial station, (ii) the position of the transmitter at the time of transmission of this collision signal, and (iii) the position of the satellite during the reception of the composite signal; and extraction of the collected and estimated collision signals, from the composite signal, in order to allow recovery of the useful signal. | 08-25-2011 |
| 20090137203 | SATELLITE COMMUNICATIONS SYSTEMS AND METHODS USING RADIOTELEPHONE LOCATION-BASED BEAMFORMING - A processor for use in a satellite communications system includes a selector that is configured to select a subset of a plurality of spatially diverse satellite signals based upon a location of a radioterminal. The processor further includes a signal processor that is configured to detect a return-link transmission from the radioterminal responsive to the selected subset of the spatially diverse satellite signals. The respective spatially diverse satellite signals may include respective signals corresponding to respective antenna elements of a satellite. The selector and the signal processor may be ground based. | 05-28-2009 |
| 20080318522 | SPURIOUS-FREE FLEXIBLE FREQUENCY CONVERTER AND A SATELLITE COMMUNICATION REPEATER ARCHITECTURE - A method for frequency conversion within a satellite-based repeater system. An uplink radio frequency signal having a frequency f | 12-25-2008 |
| 20080233865 | MULTI-BEAM COMMUNICATION SYSTEM AND METHOD - A method of flexibly allocating capacity in a satellite coverage area, comprising establishing a frequency reuse pattern of at least two interleaved sets of cells, assigning a polarization to each set of cells, such that adjacent sets of cells alternate in orthogonal polarization, flexibly assigning satellite transmit power to at least one cell, flexibly assigning frequency and bandwidth to at least one cell, and moving frequencies, bandwidths, and satellite transmit power among the cells within each set, independently of the other sets, ensuring that at all times no two adjacent cells within a given set share a common frequency. | 09-25-2008 |
| 20090253369 | VARIABLE EMITTANCE THERMOCHROMIC MATERIAL AND SATELLITE SYSTEM - The emittance value is a measure of an amount of energy expelled from a given surface area relative to a black-body reference. Depending on the specific coating a change in the emittance value is actively or passively effected. There are known active variable emittance thermal control coatings. However, such coatings are actually panels housing a mixture of both high and low emissivity materials that are electrically manipulated to control the emittance value of the panel. These “coatings” are classified as either electrochromic or electrophorectic. Both electrochromic and electrophorectic coatings require an applied voltage to cause a change in the emittance value of the coating. By contrast, aspects of the present invention do not include active variable emittance thermal control coatings. Aspects of the present invention do include passive variable emittance thermal control coatings and materials. In accordance with aspects of the present invention “passive” means that the variable emittance value changes in response to changes in the environment without active control (e.g. neither a voltage nor a current is applied). More specifically, in accordance with one aspect of the invention a passive variable emittance thermochromic material is provided that has a relatively low emittance value at low temperatures and a relatively high emittance value at high temperatures. | 10-08-2009 |
| 20120244797 | METHOD FOR CONFIGURING AN ADAPTIVE PROCESSING OF PRIMARY SIGNALS BY THE TRANSMISSION OF SECONDARY SPREAD-FREQUENCY SIGNALLING SIGNALS - A technique for configuring, in real time, an equipment item receiving and processing primary signals which are transmitted to it by satellite link, the technique including transmitting secondary signals with frequencies spread over a band at least partially overlapping a frequency band occupied by the primary signals, the secondary signals including signalling parameters which are used, in real time, by the equipment item to configure processing applied to the primary signals. The technique is applicable to dynamic switching of beams in a multi-beam satellite and to dynamic switching of frames, for example in a time-division multiple access system. | 09-27-2012 |
| 20100221997 | Active interference suppression in a satellite communication system - The invention relates to active interference suppression in a satellite communication system, particularly but not exclusively to an apparatus and method for using active interference suppression in order to suppress co-channel interference between user signals in the communication system. The communication system includes a receive or transmit antenna having a plurality of antenna elements, each antenna element associated with a respective antenna element signal. The method includes the steps of calculating complex weighting values for one or more of a plurality of beam signals, adjusting the beam signals in accordance with the calculated complex weighting values and cancelling co-channel interference in at least one of the beam signals using the one or more adjusted derived beam signals to provide an interference suppressed output signal. The complex weighting values can be calculated based on a constant modulus algorithm. | 09-02-2010 |
| 20090042509 | Satellite-Band Spectrum Utilization for Reduced or Minimum Interference - A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include generating a measure of aggregate interference reaching a satellite of the second communications system substantially from devices of the first communications system. The measure of aggregate interference reaching the satellite of the second communications system may be transmitted to an element of the first communications system. | 02-12-2009 |
| 20110028087 | SYSTEM AND METHOD FOR ENABLING ULTRA SMALL APERTURE COMMUNICATION ANTENNA USING SPECTRAL REPLICATION AND COHERENT FREQUENCY AND PHASE COMBINING - A system for enabling use of ultra-small aperture terminals in satellite communications is provided. The system comprises a transmitter configured to receive an input signal having information, a bandwidth, and an amplitude, replicate the input signal into two or more replications of the input signal, convert each of the two or more replications to have a frequency tuned to two or more corresponding satellite transponders while maintaining the bandwidth and all the information of the input signal, and combine the two or more replications into a single uplink signal. A transmit antenna is configured to transmit the uplink signal to the two or more satellite transponders. | 02-03-2011 |
| 20090247073 | XM Radio Satellite Reception Without Degrading Coverage in XM Terrestrial Markets - A system is provided for enhancing coverage for a mobile satellite service, the system comprising a signal threshold comparator module for monitoring a predetermined threshold for a satellite service signal received on a first frequency band, a signal gain block operable to vary amplification of the satellite service signal received on a second frequency band in response to the threshold, and a satellite receiver for decoding the satellite service signal received on the first and second frequency bands. | 10-01-2009 |
| 20090163138 | HYBRID TERRESTRIAL-SATELLITE TELECOMMUNICATIONS NETWORK WITH ADAPTABLE TERRESTRIAL RELAY-STATIONS - The general field of the invention is that of hybrid telecommunication networks comprising at least one telecommunication relay-satellite emitting at least one signal covering a given geographical zone organized into sub-zones of smaller dimension, a terrestrial relay-station able to receive, to process the satellite signal and to emit a signal in at least one of the sub-zones and mobile reception terminals. The network according to the invention comprises first means making it possible to carry out a mapping of the quality of reception of the satellite signal in each sub-zone; second means making it possible to transmit the mapping information to the terrestrial relay-station. The relay-station comprises third means making it possible, as a function of the reception mapping information, to emit a signal dependent on the said mapping making it possible to improve the quality of reception in its reception sub-zone. | 06-25-2009 |
| 20100304668 | COMMUNICATION METHOD IN MOBILE COMMUNICATION SYSTEM - The present invention relates to a communication method in a mobile communication system. An exemplary embodiment of the present invention provides a mobile satellite communication system having a complementary terrestrial component among various mobile communication systems. The mobile satellite communication system can simultaneously provide a communication service and a broadcasting service to a terminal according to integration between communication and broadcasting. Different signal transmission methods are used between the complementary terrestrial component and a satellite. Specifically, a time division duplex method and a frequency division duplex method are used together and resources are allocated. As a result, system throughput can be increased, and local broadcasting contents can be effectively transmitted to the terminal. | 12-02-2010 |
| 20100184370 | ADAPTIVE BEAM FORMING WITH MULTI-USER DETECTION AND INTERFERENCE REDUCTION IN SATELLITE COMMUNICATION SYSTEMS AND METHODS - Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) performing co-channel interference reduction on the communications signals to generate a plurality of interference reduced signals and (b) performing multiple access interference cancellation on the interference reduced signals. An interference reducing detector for a satellite communications system includes an interference reducer configured to perform co-channel interference reduction on communications signals to generate a plurality of interference reduced signals, and a detector configured to perform multiple access interference cancellation on the interference reduced signals. Satellite communications systems and satellite gateways including interference reducing detectors are also disclosed. | 07-22-2010 |
| 20120244798 | FREQUENCY RE-USE FOR SERVICE AND GATEWAY BEAMS - A method is presented for communicating data in a multibeam satellite system utilizing frequency re-use. The method comprises establishing uplink service beams and downlink service beams between a satellite and a plurality of subscriber terminals. A plurality of the uplink service beams are transmitted to the satellite by re-using at least one common uplink frequency channel. A plurality of the downlink service beams are transmitted from the satellite by re-using at least one common downlink frequency channel. The method further comprises establishing at least one uplink feeder beam and at least one downlink feeder beam between the satellite and a gateway terminal. The at least one uplink feeder beam is transmitted to the satellite by further re-using the at least one common uplink frequency channel. The at least one downlink feeder beam is transmitted from the satellite by further re-using the at least one common downlink frequency channel. | 09-27-2012 |
| 20100068993 | SYSTEM AND METHOD FOR SATELLITE-LONG TERM EVOLUTION (S-LTE) AIR INTERFACE - An air interface for use with a mobile satellite system that extends the baseline LTE interface modulation and coding from 3GPP. The LTE OFDM and S-FDMA technologies are used in the lowest FDD E-UTRA assigned bandwidth of 1.4 MHz but can be extended up to 7 other bands. The key differentiator for S-LTE from LTE would be the use of 32-ary Amplitude Phase Shift Keying (32-APSK) in the uplink channel for S-FDMA with LDPC and turbo coding and 64-QAM in the downlink channel for OFDM with LDPC and turbo coding. This new mechanism for S-LTE with new combination of coding will allow a robust channel model for S-LTE air interface and will enable the S-LTE air interface to have an efficient link budget. The S-LTE air interface of the present invention can be implemented in 700 MHz, 1.5 GHz, 2.1 GHz and 2.6 GHz bands or any future bands allocated for the specific air interface. | 03-18-2010 |
| 20110097995 | LUNAR COMMUNICATIONS SYSTEM - A system for communications between a lunar or planetary surface and the Earth may include a first communications satellite adapted to be positioned in a predetermined orbit relative to a celestial body. A first antenna may be mounted on the first communications satellite. The first antenna may include a predetermined beam shape for communications between the first communications satellite and an asset on the lunar or planetary surface. A second antenna may also be mounted on the first communications satellite. The second antenna may include a selected beam shape for communications between the first communications satellite and the Earth. A communications system may be included for relaying communications between the first and second antennas. | 04-28-2011 |
| 20120034866 | NON-INTERFERING UTILIZATION OF NON-GEOSTATIONARY SATELLITE FREQUENCY BAND FOR GEOSTATIONARY SATELLITE COMMUNICATION - A method, satellite and system utilizes non-geostationary satellite orbit (NGSO) frequency spectrum in geostationary satellite orbit (GSO) satellite communication in a non-interfering manner. A ground station transmits signals to a GSO satellite using a GSO frequency band and an extended frequency spectrum including the an NGSO frequency band whenever a noninterference situation exists, i.e., when an NGSO satellite is not in-line between the earth terminal and the GSO satellite or when the NGSO satellite is not utilizing the NGSO band of interest. A command module is provided to instruct the ground station to transmit signals to the GSO satellite using the GSO frequency band and the extended frequency spectrum. | 02-09-2012 |
| 20090023384 | Capacity Maximization for a Unicast Spot Beam Satellite System - Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N. | 01-22-2009 |
| 20100035543 | URGENT MESSAGE APPARATUS AND SYSTEM - An urgent message apparatus mounted in a vehicle, for transmitting, in an emergency, an urgent message with a backup battery with the use of a low-earth orbit orbiting satellite, detects a current position of the vehicle; a obtaining part obtaining a communication not-possible time zone of the low-earth orbit orbiting satellite, for the current position of the vehicle detected by the position detecting part; calculates a power amount to be consumed when the backup battery is maintained in a transmission standby state during the communication not-possible time zone obtained by the obtaining part; measures remaining power of the backup battery; compares a sum of a power amount required for transmitting the urgent message and the power amount calculated by the calculating part, with the remaining power measured by the measuring part; and determines that charging or replacement of the backup battery is required when the sum is larger. | 02-11-2010 |
| 20110189947 | FLEXIBLE COVERAGE AREAS FOR RETURN LINK SIGNALS IN A SPOT BEAM SATELLITE COMMUNICATION SYSTEM - Conventional spot beam satellites receive return uplink beam signals that each correspond to a separate and unique return downlink beam. An embodiment of the invention allows flexible coverage areas by selectively attenuating and combining multiple return uplink beam signals and transmitting them on a single beam to a gateway terminal. This allows uplink capacity to be dynamically allocated amongst different uplink signals. Offered load in different beams can be predicted and used to set the attenuation values appropriately and the attenuation values may also be controlled remotely. | 08-04-2011 |
| 20090093213 | NON-INTERFERING UTILIZATION OF NON-GEOSTATIONARY SATELLITE FREQUENCY BAND FOR GEOSTATIONARY SATELLITE COMMUNICATION - A method and system of utilizing non-geostationary satellite orbit (NGSO) frequency spectrum in a geostationary satellite orbit (GSO) satellite communication system in a non-interfering manner. The GSO satellite communication system comprises an Earth terminal to transmit signals to a GSO satellite using a GSO frequency spectrum, the Earth terminal further operable to transmit signals to the GSO satellite using an extended frequency spectrum, the extended frequency band including the GSO frequency spectrum and a non-geostationary (NGSO) frequency spectrum; a command center operative to instruct the Earth terminal to transmit signals to the GSO satellite using the GSO frequency spectrum, when an NGSO satellite is expected to be in-line with respect to the Earth terminal and the GSO satellite; and wherein the command center is further operative to instruct the Earth terminal to transmit signals to the GSO satellite using the extended frequency spectrum, when no NGSO satellite is expected to be in-line with respect to the Earth terminal and the GSO satellite. | 04-09-2009 |
| 20120302160 | EXTENSIBLE HIGH BANDWIDTH GLOBAL SPACE COMMUNICATION NETWORK - Various embodiments provide a satellite communication system including a first transceiver and a second transceiver geographically fixed on the earth, and a first satellite configured to communicate with the first transceiver through a first link. The system further includes a second satellite configured to communicate with the second transceiver through a second link and communicate with the first satellite through a laser communication crosslink. The first satellite and the second satellite are at a low earth orbit or medium earth orbit below the geostationary earth orbit of approximately 36000 km. | 11-29-2012 |
| 20110306293 | CAPACITY MAXIMIZATION FOR A UNICAST SPOT BEAM SATELLITE SYSTEM - Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N. | 12-15-2011 |
| 20110306292 | SYSTEM AND METHOD FOR OPTIMIZING SATELLITE NETWORK UTILIZATION - A system and method for optimizing satellite network utilization is disclosed. The method includes delivering a message to a communication device in the satellite network where a confirmation is received from a satellite network gateway that a message is intended for the communication device, scheduling a notification for the communication device at a scheduled time, and at the scheduled time, instructing the satellite network gateway to send the notification to the communication device. The notification causes the communication device to request the message from the network gateway upon receipt of the notification by the communication device. Scheduling may be coordinated within an alert window time period of the communication device when it is listening for notifications. The start time of the alert window time period may be provided by an application gateway, that along with the communication device, receive network time data to remain synchronized. | 12-15-2011 |
| 20110065381 | METHOD OF TRANSMITTING HIGHER POWER FROM A SATELLITE BY MORE EFFICIENTLY USING THE EXISTING SATELLITE POWER AMPLIFIERS - A method of enhancing the power transmitted from a satellite includes the steps of modulating a carrier signal at an Earth station. The non-linearity is established of a downlink amplifier on the satellite. The modulated carrier signal is to compensate for the non-linearity of the downlink and/or the uplink amplifiers. The predistorted modulated carrier signal is transmitted in an uplink to the satellite. The uplink carrier is amplified in the downlink amplifier. A downlink signal is to an Earth station, whereby the downlink signal compensates for non-linearities in the downlink amplifier to thereby optimize amplification with minimum distortion of the signals. A system for implementing the method is described. | 03-17-2011 |
| 20120045987 | SIGNAL RESTORING APPARATUS AND METHOD THEREOF - Provided are a signal restoring apparatus that can restore a reception signal of a counterpart terminal and increase frequency band efficiency by estimating its own transmission signal from a reception signal transmitted from a counterpart terminal through a satellite communication device and removing the estimated transmission signal, and a method thereof. The signal restoring apparatus according to the exemplary embodiment of the present invention includes: a transmitter transmitting a transmission signal to a satellite communication device; a band spread signal generator transmitting a band spread signal to the satellite communication device; a signal estimator estimating the transmission signal included in a reception signal transmitted from a counterpart terminal through the satellite communication device on the basis of the transmission signal and the band spread signal; and a signal remover removing the estimated transmission signal from the reception signal. | 02-23-2012 |
| 20090298423 | Piggy-Back Satellite Payload - A method is presented for utilizing excess satellite bus power comprising (1) sending a broadband signal in at least one feeder beam in a forward direction from a gateway terminal to a bent pipe repeater satellite for relay to at least one subscriber terminal, wherein the satellite is operable to provide a total amount of bus power, wherein an existing payload consumes an occupied portion of the total bus power, wherein an additional payload consumes a remaining portion of the total bus power and comprises a plurality of satellite-based transmission amplifiers, (2) receiving the broadband signal and amplifying the broadband signal using one of the plurality of satellite-based transmission amplifiers, (3) sending the amplified broadband signal, as one of a plurality of service spot beams, to the at least one subscriber terminal, and (4) receiving and retrieving data from the amplified broadband signal at the at least one subscriber terminal. | 12-03-2009 |
| 20090170429 | Methods of Reducing Interference Including Calculation of Weights Based on Errors and Related Systems - Methods of reducing interference in a satellite communications system may include receiving a plurality of feeder link signals and time aligning the plurality of feeder link signals to provide time aligned feeder link signals. At least two of the time aligned feeder link signals may be combined to provide reduced interference of at least one of the feeder link signals. Related systems are also discussed. | 07-02-2009 |
| 20120028572 | Polarization Re-alignment for Mobile Satellite Terminals - A system for allowing ground terminals, specifically mobile ground terminals, to dynamically and electronically realign signal polarizations to match that of incoming and outgoing signal polarizations from designated space assets, specifically communications from satellites, comprising an adaptive re-orientation technique based on a cost minimization function, and a means of direct calculations of weighting components based on the knowledge of the orientation and bearing of both the satellites and the ground terminals. The embodiment will allow a mobile ground terminal to electronically realign itself to the signals of a satellite, without the need for mechanical processes to physically re-orient the antenna array. | 02-02-2012 |
| 20120064823 | RADIO FREQUENCY SWITCH FOR USE IN SATELLITE RECEIVERS - Embodiments of the invention generally provide a radio frequency switch, for example for use in a satellite receiver. The switch includes a plurality of input ports and a plurality of output ports, where output ports independently select signal paths from any of the input ports. The entire switch is embodied in a compact single-board layout. In another embodiment, a satellite receiver includes at least one antenna for receiving a signal from a satellite transponder and a radio frequency switch for selecting the satellite transponder from among a plurality of satellite transponders. | 03-15-2012 |
| 20120252356 | PAYLOAD FOR A MULTI-BEAM SATELLITE - A payload includes one or more antennas for receiving polarized radiofrequency signals; a device for regenerating radiofrequency signals by filtering, frequency transposition, and amplification; and antennas for transmitting the regenerated radiofrequency signals to one or more terrestrial terminals. The regeneration device includes a plurality of regeneration channels, each channel including an amplification device capable of amplifying a plurality of radiofrequency signals having separate frequency bands, and in that the transmission antennas are capable of transmitting regenerated radiofrequency signals, via a single regeneration channel, to non-contiguous basic coverage areas, respectively, the basic coverage areas belonging to a single cellular layout that uses at least two separate frequency bands and two separate polarizations. | 10-04-2012 |
| 20120135678 | Drift Compensator for a Tuning Device - An apparatus coupled to, or integrated with, a tuner. This apparatus, which may be referred to herein as a “compensator,” may operate to adjust a frequency of the tuner to counteract drift or error that may cause the tuner to erroneously tune to an inaccurate or undesired frequency. The compensator may be implemented as hardware or software, and may be stand-alone or integrated into the tuner and/or LNBF. | 05-31-2012 |
| 20120178362 | Low-Cost Satellite Communication System - A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized. | 07-12-2012 |
| 20120258659 | System and Method for Remotely Distributing Firmware Upgrades to Large Numbers of Distributed Devices - A system for sending updates to a large number of remote units is described. The system includes a plurality of remote units, each remote unit comprising one or more sensors and a communications transceiver. A control center is in communication with the remote units and includes an update database reflecting the update status of each of the plurality of remote units. The control center establishes contact with each of the plurality of remote units and sends an update when communication has been established. The update database is periodically updated to reflect the completion of the update for each mobile unit based on a completion message from each of the remote units that has successfully installed the update. | 10-11-2012 |
| 20120190298 | METHOD AND APPARATUS FOR PROVIDING BROADBAND SIGNALS TO A PORTABLE USER DEVICE - A method and apparatus for providing broadband signals to a portable user device is disclosed. Broadband signals, such as satellite radio signals, are received at a base station having a plurality of antennas. The content of the broadband signals are then encoded using space time coding (STC), and the STC encoded broadband content is transmitted from the plurality of antennas via a first wireless network protocol. The STC encoded broadband content can be received at a portable user device having a plurality of antennas or at a wireless access point having a plurality of antennas, which then transmit the broadband signals via a second wireless network protocol. | 07-26-2012 |
| 20120190297 | METHOD AND SYSTEM FOR IMPROVING THE SPECTRAL EFFICIENCY OF A DATA COMMUNICATION LINK - An apparatus for communicating between a mobile device, and a plurality of transceivers. The apparatus includes a first transceiver which transmits to the mobile device on any one of a plurality of channels. The apparatus further includes a second transceiver which transmits to the mobile device on any one of the plurality of channels. | 07-26-2012 |
| 20120238203 | NON-INTERFERING UTILIZATION OF NON-GEOSTATIONARY SATELLITE FREQUENCY BAND FOR GEOSTATIONARY SATELLITE COMMUNICATION - A method, satellite and system utilizes non-geostationary satellite orbit (NGSO) frequency spectrum in geostationary satellite orbit (GSO) satellite communication in a non-interfering manner. A ground station transmits signals to a GSO satellite using a GSO frequency band and an extended frequency spectrum including the NGSO frequency band whenever a noninterference situation exists, i.e., when an NGSO satellite is not in-line between the earth terminal and the GSO satellite or when the NGSO satellite is not utilizing the NGSO band of interest. A command module is provided to instruct the ground station to transmit signals to the GSO satellite using the GSO frequency band and the extended frequency spectrum. | 09-20-2012 |
| 20100022185 | System and method of satellite communication that reduces the doppler frequency shift of the satellite signals - A system and method of communicating signals is provided. The system includes a plurality of satellites, at least one receiver, and at least one satellite uplink station. The plurality of satellites include at least one active satellite. The at least one receiver is in communication with the plurality of satellites, and receives a signal from the at least one active satellite. The at least one satellite uplink station is in communication with the plurality of satellites, and transmits the signal and alters a frequency of the signal based upon a location of the at least one active satellite to reduce a Doppler frequency shift when activating and deactivating the plurality of satellites. | 01-28-2010 |
| 20080207118 | UPLINK FREQUENCY MULTIPLEXING SYSTEM - A satellite-borne transponder for two or more uplink service areas, includes uplink antennae, a low noise amplifier and a converter for each uplink antenna, input filters, amplification chains, each amplification chain including a channel amplifier, a high power amplifier, and an output filter, and a downlink antenna for an associated downlink service area. The transponder associates uplink antennae to an uplink service area, the number of antennae being determined by a preset Figure of Merit for each uplink service area. The transponder also includes at least one input multiplexer including a passband filter for each reception chains, each reception chain including an uplink antenna, a low noise amplifier, and a converter linked to the multiplexer. | 08-28-2008 |
| 20120094593 | Broadband Satellite with Dual Frequency Conversion and Bandwidth Aggregation - A broadband satellite having a payload subsystem configured to provide dual frequency conversion and bandwidth aggregation is communicatively coupled (i) to at least one gateway by a feeder link operating at a first frequency band; and (ii) to a plurality of user terminals by user links operating at a second frequency band. The payload subsystem has a first and a second frequency converter a satellite feeder link antenna feed, and a satellite user link antenna feed. The first frequency converter down converts, to a third frequency band, as an aggregated block, signals received at the satellite feeder link antenna feed from the gateway via the feeder link. The third frequency band is substantially lower than both the first and second frequency band. The down converted signals are routed to the second frequency converter for up converting to the second frequency band for transmission over the user link to the user terminals. | 04-19-2012 |
| 20100203828 | SYSTEMS, METHODS AND TRANSCEIVERS FOR WIRELESS COMMUNICATIONS OVER DISCONTIGUOUS SPECTRUM SEGMENTS - Methods of transmitting a plurality of communications signals over a plurality of discontiguous bandwidth segments in a frequency band include defining a plurality (N | 08-12-2010 |
| 20100203827 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN A SATELLITE SIGNAL RECEIVER - A method and apparatus for mitigating interference in a satellite signal receiver is described. The satellite signal receiver receives satellite signals from a plurality of satellites. In one example, data transmission of a wireless transceiver operating in proximity to the satellite signal receiver is monitored. A control signal is transmitted to the satellite signal receiver upon occurrence of data transmission from the wireless transceiver. Signal integration within the satellite signal receiver is then gated is response to the control signal. In another example, one or more values of satellite signal samples are selected from a plurality of possible values. A percentage of satellite signal samples having the one or more selected values is monitored over a predefined period. Signal integration within the satellite signal receiver is gated in response to the percentage exceeding a predefined threshold. In yet another example, a gain setting of an automatic gain control circuit within the satellite signal receiver is adjusted in response to detection of interference. | 08-12-2010 |
| 20110263199 | SPECTRUM SHARING BETWEEN AN AIRCRAFT-BASED AIR-TO-GROUND COMMUNICATION SYSTEM AND EXISTING GEOSTATIONARY SATELLITE SERVICES - The present Spectrum Sharing System implements spectrum reuse between aircraft-based Air-To-Ground (ATG) communication systems and Geostationary Satellite Service systems. This is accomplished by managing the radio frequency transmissions in the volume of space in which the aircraft operates, with interference between the Spectrum Sharing System and the Geostationary Satellite Service system being reduced by implementing reversed uplink and downlink radio frequency paths in the common spectrum. The Spectrum Sharing System also avoids interfering with Geostationary Satellite Services' earth stations which are pointed towards the satellites' orbital arc by relying upon a combination of the earth stations' highly directive antenna patterns and the Spectrum Sharing System ground station antenna pattern, and to avoid interfering with satellites in their orbital arc by assuring that power levels radiated in that direction by the Spectrum Sharing System ground stations are below the level that would create interference. | 10-27-2011 |
| 20100022186 | Downstream Channel Bonding - A satellite system for broadband communication with a plurality of remote locations is described. The satellite system comprises service spot beams from a satellite. Forward channels may be transported on carriers of the service spot beams. A plurality of forward sub-channels may be passed on the forward channels. A plurality of logical downstreams may correspond one-to-one with the plurality of forward sub-channels. The satellite system may further include a satellite modem with a channel bonding unit that combines a plurality of logical downstreams into a downstream group and processes the downstream group to provide information to customer premises equipment. | 01-28-2010 |
| 20130017778 | CAPACITY MAXIMIZATION FOR A UNICAST SPOT BEAM SYSTEM - Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N. | 01-17-2013 |
| 20130023205 | Satellite-Based SAR Services - A satellite-based SAR system having a space segment with a plurality of satellites and a ground segment with one or a plurality of ground stations is provided. A satellite receives a position report from an emergency transmitter in its service area and forwards it to a ground station. The ground segment stores the position of the emergency transmitter, received with the last position report, in a management system for emergency transmitters. The emergency transmitter sends position reports to the satellite such that the reception of position reports at the satellite is coordinated such that at any time only position reports arrive which differ with regard to their signal parameters such that simultaneous reception is possible. A rescue operation is initiated for the emergency transmitter if no deactivation message has been received from the emergency transmitter and no position report is received from the emergency transmitter within a specified period. | 01-24-2013 |
