Synchronous Satellite Patents (Class 342/356)
  • Patent number: 10277306
    Abstract: A system includes a ground hub and a mobile airborne platform hovering over or close to a coverage area on or near the earth surface. The mobile airborne platform comprises a bistatic radar receiver including an antenna system to capture first radiofrequency signals originated from a first satellite and second radiofrequency signals originated from a second satellite, via direct paths and via reflected paths from the coverage area. The mobile airborne platform transmits the captured first and second radiofrequency signals to a ground hub via a feeder link. The ground hub includes a remote beam forming network to remotely form receiving beams for the antenna system of the bistatic radar receiver to capture the first and second radiofrequency signals, and a remote radar processing center to transform the captured first and second radiofrequency signals into a first and a second two-dimensional radiofrequency image, respectively.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: April 30, 2019
    Assignee: SPATIAL DIGITAL SYSTEMS, INC.
    Inventor: Donald C. D. Chang
  • Patent number: 10263331
    Abstract: Techniques and mechanisms to transmit signals with an antenna array. In an embodiment, a first signal is received at a first input of the first antenna while a second signal is received at a second input of the second antenna. A difference in phase differentials—the phase differentials each between the first signal and the second signal—results from propagation of the first signal and the second signal in the antenna array and from a difference between respective configurations of the first antenna and the second antenna. Each of the first antenna and the second antenna has respective emitters distributed along the length thereof. In another embodiment, the first antenna and the second antenna have different respective dielectric structures or different respective distributions of emitters.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: April 16, 2019
    Assignee: KYMETA CORPORATION
    Inventors: Nathan Kundtz, Bruce Rothaar
  • Patent number: 10243769
    Abstract: A communication apparatus has a receiver that is capable of receiving an alternating phase signal and a tuned circuit whose input is adjusted to be capable of receiving the alternating phase signal. The communication apparatus can be used with both wireless and wired communication links and provide enable faster data rates, greater immunity to noise, increased bandwidth/spectrum efficiency and/or other benefits. Applications include but are not limited to: cell phones, smartphones (e.g., iPhone, BlackBerry, etc.), wireless Internet, local area networks (e.g., WiFi type applications), wide area networks (e.g., WiMAX type applications), personal digital assistants, computers, Internet service providers and communications satellites.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: March 26, 2019
    Assignee: Falcon Nano, Inc.
    Inventors: William A. Hastings, III, James Horn
  • Patent number: 10135520
    Abstract: A hub terminal and remote client communicate via a target satellite in an inclined geosynchronous orbit. As the target satellite ascends or descends away from the geostationary arc, the signal strength of the uplink channel is increased without increasing the level of interference with geostationary satellites. The increased angular separation from geostationary satellites also decreases downlink interference. The resulting increase in signal strength permits adjustment of the modulation and coding parameters to increase spectral efficiency. The antenna gain pattern is modeled based on antenna characteristics and the model may be supplemented with measurements of a signal relayed by other satellites. The method permits intermittent communication with an inclined satellite sharing a geostationary slot with a station-kept satellite, or from locations where the geostationary arc is blocked, or while using disadvantaged antennas that would be impractical for use with geostationary satellites.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: November 20, 2018
    Inventor: Peter Lemme
  • Patent number: 10026311
    Abstract: A method of movement mode determination comprising measurement of vehicle's position and orientation and calculation of movement parameters, a compass on the vehicle, is azimuthally oriented along the prevailing and is mostly used movement direction (“forward” direction), a movement vector measurement unit, is used for measuring the azimuth of movement vector. A calculation unit being used for measuring an angle between vehicle movement vector azimuth measured by the movement vector measurement unit and vehicle azimuth measured by the compass fixed on the vehicle; movement is regarded as “backward” if the calculated angle is greater than 90 degrees, and “forward” if the calculated angle is smaller than 90 degrees. Also, an apparatus for movement direction determination includes a compass and a computation unit and further comprises a movement vector measurement unit for determining vehicle movement azimuth and connected through a signal connection to the computation unit.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: July 17, 2018
    Assignee: Topcon Positioning Sytems, Inc.
    Inventors: Alexey V. Zhdanov, Eugene I. Zintsov
  • Patent number: 9897701
    Abstract: Methods and apparatuses for a receiver of signals from one or more satellite navigational systems to detect and/or eliminate impaired satellites from the set of estimated/acquired satellites in view are described. One method includes acquiring coarse position, time, and frequency values for each of a plurality of satellites from one or more satellite navigational systems, the plurality of satellites being those currently estimated to be in view of the receiver; determining whether one or more of the acquired coarse values are within a minimum range; and if it is determined that the one or more acquired coarse values are within the minimum range: determining a pseudo-true peak of a position domain correlogram comprising Line of Sight (LOS) vectors of each of the plurality of satellites; and identifying any satellite whose cross-correlation peak is beyond a maximum distance from the pseudo-true peak as an impaired satellite.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: February 20, 2018
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Phanikrishna Sagiraju
  • Patent number: 9742927
    Abstract: The invention relates to an online charging method for always on IP connectivity in a communication system, the method comprises a Diameter router receiving an online charging request from a Diameter client, wherein the online charging request includes subscriber information; the Diameter router finding a corresponding online charging system in a subscriber index database based on the subscriber information; sending a successful acknowledge to the Diameter client and generating a ticket file when the corresponding online charging system does not exist in the subscriber index database or the corresponding online charging system is not available, wherein the successful acknowledge includes a dummy quota specified by the Diameter router; and the ticket file processor reading the ticket file based on a scheduled timing and generating a first online charging event request and sending the first online charging event request to the Diameter router when the corresponding online charging system exists in the subscribe
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 22, 2017
    Assignee: Alcatel Lucent
    Inventor: Xiangyang Li
  • Patent number: 9735785
    Abstract: Various embodiments implement apparatuses and methods for conversion of radio frequency (RF) signals to intermediate frequency (IF) signals. More particularly, some embodiments are directed toward down conversion of RF signals to IF signals in a multi-band radio receiver, such as a satellite receiver, using a single oscillator for different frequency bands. For example, some of the apparatuses and methods presented are suitable for integration into monolithic RF integrated circuits in low-cost satellite receivers for home entertainment use.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: August 15, 2017
    Assignee: Entropic Communications, LLC.
    Inventors: Jeremy Goldblatt, Branislav Petrovic, Wing Fat Lau, Martin Alderton
  • Patent number: 9534898
    Abstract: A method of movement mode determination comprising measurement of vehicle's position and orientation and calculation of movement parameters, a compass on the vehicle, is azimuthally oriented along the prevailing and is mostly used movement direction (“forward” direction), a movement vector measurement unit, is used for measuring the azimuth of movement vector. A calculation unit being used for measuring an angle between vehicle movement vector azimuth measured by the movement vector measurement unit and vehicle azimuth measured by the compass fixed on the vehicle; movement is regarded as ‘backward” if the calculated angle is greater than 90 degrees, and “forward” if the calculated angle is smaller than 90 degrees. Also, an apparatus for movement direction determination includes a compass and a computation unit and further comprises a movement vector measurement unit for determining vehicle movement azimuth and connected through a signal connection to the computation unit.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: January 3, 2017
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Alexey V. Zhdanov, Eugene I. Zintsov
  • Patent number: 9351313
    Abstract: Some demonstrative embodiments include devices, systems and/or methods of communicating during a Contention-Based-Access-Period (CBAP). For example, a device may include a wireless communication station to transmit a wireless communication transmission over a wireless communication medium upon determining that the wireless communication medium is idle for a predefined time period within a contention-based-access period (CBAP), if a scheduling element allocating the CBAP includes an indication of an identity of the wireless communication station in a predefined field.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: May 24, 2016
    Assignee: INTEL CORPORATION
    Inventors: Solomon B. Trainin, Carlos Cordeiro
  • Patent number: 9045239
    Abstract: Spacecraft payload orientation steering is provided for an orbiting spacecraft in motion along an orbit track around a celestial body, the orbit track having a nominal inclination with respect to an equatorial orbit, a substantial eccentricity, and a drift angle with respect to the nominal inclination. Coordinates of an optimal payload target location as a function of a spacecraft position along the orbit track are determined, the target location being on the surface of the celestial body and having a substantial motion with respect to the surface and with respect to a spacecraft nadir. A payload of the spacecraft is substantially aligned with the determined coordinates by steering the satellite body to correct for at least one of the inclination drift angle, and the eccentricity, thereby adjusting the spacecraft orientation as a function of the spacecraft position along the orbit track.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: June 2, 2015
    Assignee: Space Systems/Loral, LLC
    Inventors: Saghir Munir, Xen Price, Matthew Machlis
  • Publication number: 20140266872
    Abstract: A conical region in space with a base at a geosynchronous distance from the earth and the apex of the cone at a point on the ground may be termed a space needle. A multiplicity of small satellites in elliptical orbits located within such a space needle may establish timing of their radio frequency (RF) transmissions forming what may be termed a needle beam downlink having an apparent origin that may be thousands of kilometers to the North or South of a Kepler geosynchronous satellite parking orbit. A noise-like RF signal may be transmitted synchronously from multiple transmitters in space forming a spatially distributed spread spectrum RF needle beam. Applying the method of space-based needle beams to a multiplicity of transmitters on the ground, a network of ground stations may form a ground-based needle beam uplink that may be pointed a given satellite at a given time.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventor: Joseph Mitola, III
  • Patent number: 8714458
    Abstract: Disclosed herein is a tracking system configured to track a product and/or an activity. The tracking system comprises a tracing device and a verification server. The tracing device is coupled with the verification server by means of communication means configured to allow exchange of data between the tracing device and the verification server. The tracing device is coupled with a first satellite localization receiver which is configured to receive signals from a satellite localization system, process the received signals to obtain satellite localization observables, and compute locations based on the satellite localization observables. The tracing device is configured to acquire from the first satellite localization receiver positioning data. The tracing device is further configured to provide the verification server with the positioning data and the satellite localization observable acquired from the satellite localization receiver.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: May 6, 2014
    Assignee: Telespazio S.p.A.
    Inventor: Mario Musmeci
  • Patent number: 8655578
    Abstract: An electronic device 1 receives ephemeris information from a GPS satellite at intermittent timings TE1, TE2, and TE3 and stores the received information in its memory. In addition, the electronic device 1 receives time information at intermittent timings TC1, TC2, TC3, and TC4, and corrects a clocked time based on the received time information. Then, at positioning timing T1, the electronic device 1 captures a transmission signal from the GPS satellite while synchronizing timing with the GPS satellite based on the clocked time, and performs positioning based on the captured transmission signal and the ephemeris information stored in the memory.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 18, 2014
    Assignee: Casio Computer Co., Ltd
    Inventor: Masao Sambongi
  • Patent number: 8600292
    Abstract: A satellite communication system designed to communicate with wireless communication devices (WCDs) by use of a mosaic pattern of signal beams uses multiple beams to augment the communication with individual WCDs. In addition to communication with a WCD through a primary beam for that WCD, adjacent beams are used, but with signals utilizing circuit parameters assigned to the primary beam. The signals from a given WCD are relayed in a backhaul, either as an aggregate signal processed by the satellite, or as backhaul communication signals to be combined or separated on the ground.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 3, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Ahmad Jalali
  • Patent number: 8462044
    Abstract: The present invention provides a method and apparatus for determining the transmit location of an emitter using a single geostationary satellite. In an embodiment, a signal is received at a ground station from the emitter and relayed by the geostationary satellite. The signal is received at the ground station at a plurality of time instances and has a plurality of observed frequencies, one for each time instance. A plurality of lines of position are determining based on the plurality of observed frequencies. The transmit location of the emitter is determined based on at least one intersection among the plurality of lines of position.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: June 11, 2013
    Assignee: Glowlink Communications Technology, Inc.
    Inventors: Dominic K. C. Ho, Jeffrey C. Chu, Michael L. Downey
  • Patent number: 8457885
    Abstract: Technology is generally described for computing paths between geographical localities. The technology can receive a request for a path between two or more geographical localities, and compute a path based at least on a popularity rating of intermediate geographical localities.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: June 4, 2013
    Assignee: Empire Technology Development LLC
    Inventor: Arvind Vijay Keerthi
  • Patent number: 8339309
    Abstract: A global communication satellite system includes at least three communication satellites. Each communication satellite is disposed in a geostationary orbit about the Earth. Each communication satellite also includes a feed horn array having at least 4,000 feed horns with each feed horn capable of transmitting at least one radio frequency (RF) signal. The feed horn array produces a plurality of spot beams with each spot beam corresponding to a spot beam area on the surface of the Earth. Each spot beam area has a generally circular shape with a diameter less than 150 miles. Furthermore, each spot beam area overlaps with a plurality of other spot beams areas such that plurality of spot beams provide saturation coverage of all populated land areas of the Earth.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: December 25, 2012
    Inventor: Brian McCandliss
  • Patent number: 8315202
    Abstract: A system includes a central controller to transmit a plurality of synchronization codes through a transmission medium and a plurality of satellite controllers, each satellite controller configured to recognize one or more synchronization codes of the plurality of synchronization codes, each satellite controller comprising a synchronous clock signal generator to generate a synchronous clock signal each time the satellite controller recognizes the one or more synchronization codes of the plurality of synchronization codes.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: November 20, 2012
    Assignee: Ruction Capital Limited Liability Company
    Inventor: Mark Francis
  • Patent number: 8170082
    Abstract: Embodiments related to cross-talk mitigation are described and depicted.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: May 1, 2012
    Assignee: Infineon Technologies AG
    Inventor: Andreas Schmid
  • Patent number: 8106815
    Abstract: Disclosed is a system for positioning a terrestrial user. The system includes navigation satellites placed in medium altitude orbits, management satellites placed in high orbits, able to manage the navigation satellites and communicate with the Earth. The management satellites can include a set of at least three management satellites each placed in a high orbit, having a plane that is inclined with respect to the plane of the terrestrial equator and cuts the equator along a diametral straight intersection line with respect to the Earth. Two external diametral straight intersection lines can form an angle of longitude of at least 90 degrees.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: January 31, 2012
    Assignee: Astrium SAS
    Inventor: Robert Laine
  • Patent number: 8060108
    Abstract: A method and apparatus for providing a sequence of location data points to a mapping device. A cellular mobile station uses GPS satellite signals to compute its varying location over time and outputs the location as data points in a sequence to the mapping device. If the mobile station loses satellite communication, it transitions the output sequence to a static state in which the location data points are a substantial repetition of the last location that the mobile station determined from satellite signals. Further, when the mobile station detects that it has entered into a new cellular coverage area, it obtains satellite assistance data from its cellular carrier network and uses the data to renew satellite communication. The mobile station may then transition the sequence back to a dynamic state, with location data points determined over time based on received satellite signals.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: November 15, 2011
    Assignee: Sprint Spectrum L.P.
    Inventors: Terry G. Rayburn, Michael P. McMullen
  • Publication number: 20110068972
    Abstract: A global communication satellite system includes at least three communication satellites. Each communication satellite is disposed in a geostationary orbit about the Earth. Each communication satellite also includes a feed horn array having at least 4,000 feed horns with each feed horn capable of transmitting at least one radio frequency (RF) signal. The feed horn array produces a plurality of spot beams with each spot beam corresponding to a spot beam area on the surface of the Earth. Each spot beam area has a generally circular shape with a diameter less than 150 miles. Furthermore, each spot beam area overlaps with a plurality of other spot beams areas such that plurality of spot beams provide saturation coverage of all populated land areas of the Earth.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 24, 2011
    Inventor: Brian McCandliss
  • Patent number: 7904243
    Abstract: Data from GPS satellites within the field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed-forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Iridium and data aiding thus provides a means for extending GPS performance under a variety of data-impaired conditions because it can provide certain aiding information over its data link in real time.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: March 8, 2011
    Assignee: The Boeing Company
    Inventors: Clark Cohen, Bart Ferrell, Greg Gutt, David Whelan
  • Publication number: 20100182192
    Abstract: According to the invention, navigation satellites (1) are at least partially managed by at least three management satellites (3.1 to 3.3) positioned on high orbits inclined in relation to the equator (E). Said high orbits intersect the equatorial plane along intersecting diametrical straight lines (5.1 to 5.3), such that the two outer intersecting diametrical lines (5.2, 5.3) form therebetween an angle of longitude (2?) that is at least equal to 90°.
    Type: Application
    Filed: June 19, 2008
    Publication date: July 22, 2010
    Applicant: Astrium SAS
    Inventor: Robert Laine
  • Patent number: 7710313
    Abstract: A method of using a bistatic passive radar system for tracking a plurality of targets utilizing transmitted radar signals from at least one satellite platform in a geosynchronous orbit with the earth, a radar receiver capturing signals from a reflection of the transmitted radar signals from each target, tracking a position of each target over time, and a processing method for computation of a fire control solution of each target.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: May 4, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Sam Ghaleb, Floyd A. Kinder
  • Patent number: 7633998
    Abstract: A system for receiving a satellite digital radio signal, the system comprising: a repeater having a unibody housing and an antenna disposed within the housing, the antenna being configured for receiving the satellite digital radio signal; a repeater circuit for receiving the satellite digital radio signal of the antenna, the repeater circuit being configured to condition and re-transmit the satellite digital radio signal as a first signal containing audio data capable of being transmitted through electrical wiring; a satellite digital radio signal receiver having a receiver circuit being configured to receive the first signal; and wherein the receiver circuit receives the first signal from a power cable of the satellite digital radio signal receiver.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: December 15, 2009
    Assignee: Delphi Technologies, Inc.
    Inventors: Joseph R. Dockemeyer, Daniel W. Farrow, William R. Livengood, Daniel G. Morris, Korkut Yegin
  • Publication number: 20090295628
    Abstract: A satellite system for broadband communication with a plurality of remote locations in a geography is described. The satellite system utilizes a plurality of service spot beams distributed over the geography in a fixed pattern and a plurality of return spot beams distributed over the geography, wherein the service spot beams and the return spot beams use overlapping frequencies.
    Type: Application
    Filed: March 26, 2009
    Publication date: December 3, 2009
    Applicant: ViaSat, Inc.
    Inventors: Robert Wilson, Mark D. Dankberg
  • Patent number: 7555297
    Abstract: A communication system for supporting communications with a target market area. The system includes one or more solar-powered aircraft maintained in, or successively passing through, flight stations or flight patterns around the market area. Each of the aircraft targets limited beamwidth communication antennas on a substantial portion of the target market area. The control system is configured to fly selective flight patterns depending on the aircraft characteristics and the flight conditions. The flight patterns may emphasize high-power-generation patterns such as flying away from the sun for aircraft with wing-mounted solar cells.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: June 30, 2009
    Assignee: Aerovironment Inc.
    Inventors: Bart D. Hibbs, Earl C. Cox
  • Patent number: 7545764
    Abstract: A system includes a central controller to transmit a plurality of synchronization codes through a transmission medium and a plurality of satellite controllers, each satellite controller configured to recognize one or more synchronization codes of the plurality of synchronization codes, each satellite controller comprising a synchronous clock signal generator to generate a synchronous clock signal each time the satellite controller recognizes the one or more synchronization codes of the plurality of synchronization codes.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: June 9, 2009
    Assignee: Cypress Semiconductor Corporation
    Inventor: Mark Francis
  • Patent number: 7486224
    Abstract: 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 for receiving radar signals from a reflection from each target, means for tracking a position of each target over time, and means for computation of a fire control solution of each target.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: February 3, 2009
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Sam Ghaleb, Floyd A. Kinder
  • Patent number: 7466264
    Abstract: A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit devices is disclosed. A positioning-unit device observes the time and frequency of received Global Navigation Satellite System (GNSS) signals relative to the synchronized network of positioning-unit devices. These time and frequency observations are modulated, as assistance data, onto the positioning signals that are broadcast by the positioning-unit devices. A position receiver demodulates the assistance data and analyzes the positioning signals. The position receiver then searches for Global Navigation Satellite System (GNSS) signals in a range responsive to the assistance data and the analysis of the received positioning signals.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: December 16, 2008
    Inventors: James Lamance, David Small
  • Patent number: 7454272
    Abstract: According to one embodiment of the invention, a stationkeeping method for a geostationary satellite includes determining a gravitational force of the sun on the satellite at a beginning of a stationkeeping operation and a gravitational force of the moon on the satellite at the beginning of the stationkeeping operation. An initial inclination vector of the satellite is determined at the beginning of the stationkeeping operation that accounts for a first set of one or more perturbations affecting the orbit of the satellite. A maneuver strategy is determined to correct for a second set of one or more perturbations affecting the orbit of the satellite without accounting for the first set of one or more perturbations affecting the orbit of the satellite. Finally, a maneuver is performed on the satellite according to the maneuver strategy.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: November 18, 2008
    Assignee: Raytheon Company
    Inventor: Jeffrey S. Burgess
  • Patent number: 7432852
    Abstract: The present invention relates to a method of synchronizing base stations of a terrestrial cellular communication system using a satellite component.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: October 7, 2008
    Assignee: Alcatel Lucent
    Inventors: Michel Monnerat, Arnaud Masson
  • Patent number: 7428405
    Abstract: Provided are an automatic operation system for automating satellite control operation, a method thereof, and an automatic satellite ground control system using the same. The object of the present research is to provide an automatic operation system that can reduce operation manpower and cost by automatically operating an entire satellite ground control system, which requires a plurality of operators to be properly operated, all the times, a method thereof, and an automatic satellite ground control system using the same. The satellite ground control system of the present research includes: a mission timeline receiving unit, an operation procedure editing unit, an operation procedure analyzing and code transforming unit, an operation procedure executing unit, a subsystem process state monitoring unit, and an access managing unit for providing interface with each of the subsystems.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: September 23, 2008
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In-Jun Kim, Jae-Hoon Kim
  • Patent number: 7391677
    Abstract: A positioning device has a reception unit for receiving navigation messages transmitted continuously in a time series from positioning information satellites orbiting the Earth and determines the location of the positioning device based on the navigation messages received by the transmission unit. Each navigation message is segmented into a plurality of data transmission blocks that are transmitted sequentially, a portion of the data transmission blocks carry almanac data containing orbital information for all positioning information satellites including the positioning information satellite transmitting the received navigation message, and the data transmission blocks carrying the almanac data are transmitted non-contiguously. The positioning device also has signal discrimination unit for identifying the start of receiving a data transmission block containing the non-contiguously transmitted almanac data, and identifying the end of receiving the data transmission block containing the almanac data.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: June 24, 2008
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Urano, Teruhiko Fujisawa, Katsuyuki Honda, Jun Matsuzaki
  • Patent number: 7369847
    Abstract: A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same communication resource is provided. Preferably, cells having the same resource are separated. The antenna is shaped to suppress interference with locations having the same resource. The areas not having the same resource are not suppressed to allow the system to have maximum capacity and allow a smaller antenna aperture.
    Type: Grant
    Filed: September 14, 2000
    Date of Patent: May 6, 2008
    Assignee: The DIRECTV Group, Inc.
    Inventors: Harold Rosen, Ying Feria, Parthasarathy Ramanujam
  • Patent number: 7317895
    Abstract: A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system into one or several geographical areas; positioning one or several timing units in at least one geographical area; determining which of the satellites of the satellite communication system are visible in each particular geographical area; controlling the timing unit with a control unit, in order to minimize the time difference within the system, to listen to one or several satellites visible in each particular geographical area, the signals received from the satellites by the timing unit fulfilling a predetermined condition; synchronizing a predetermined number of geographical areas with each other by means of the control unit of the system such that the time difference within the system is minimized in a predetermined combination area of geographical areas.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: January 8, 2008
    Assignee: Nokia Corporation
    Inventors: Mikko Weckström, Jarko Niemenmaa, Risto Martikkala
  • Patent number: 7200414
    Abstract: A cellphone system comprises a GPS reference station located with a telephone cell site. Such GPS reference station tracks the GPS satellites visible to its local area and estimates the Doppler for each such GPS satellite. The system also includes mobile GPS receivers and cellphones that move around and through the operational area of the cell site. It is assumed that the satellite Dopplers seen by the GPS reference station will have insubstantial differences with the true Dopplers observed by other GPS receivers operating within the cell site's service area. The Doppler estimates are thus routinely communicated over a wireless telephone channel to the mobile GPS receivers and cellphones that register locally. Such mobile GPS receivers then can confidently adopt the surrogate Doppler estimates as a center starting point for their initialization frequency searches. The time required for such mobile GPS receivers and cellphones to initialize and provide a first fix is thereby substantially reduced.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: April 3, 2007
    Assignees: Seiko Epson Corporation, eRide, Inc.
    Inventors: Paul W. McBurney, William J. Morrison
  • Patent number: 7142154
    Abstract: Method and apparatus for providing accurately synchronized timing signals at mutually distant locations employs a GPS or similar receiver at each location. These receivers are interconnected by a communications network, and exchange data over the network to agree a common timing reference.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: November 28, 2006
    Assignee: Roke Manor Research Limited
    Inventors: Timothy John Quilter, David Sherry, Robert John Weedon
  • Patent number: 7123186
    Abstract: A satellite positioning device is disclosed for determining position based on received satellite navigation signals and a received non-satellite signal. A local clock controls the epoch period of a satellite signal processor. Correction signals are applied to the local clock in order to improve the synchronization between the satellite signal processor and the non-satellite signal processor.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: October 17, 2006
    Assignee: Topcon GPS, LLC
    Inventors: Vernon Joseph Brabec, Sergei B. Yudanov, Alexey Vladislavovich Zhdanov
  • Patent number: 7065348
    Abstract: A method for providing location information. In the method a demand of providing location information of a terminal of a second user is accepted from a terminal of a first user. An approval of the location information provided to a terminal of the second user is requested, which depends on a request of providing the location information. A reply for approving providing the location information is received from the second terminal. Map information of the first and the second user which includes each other's location information is then generated, the location information which was provided from the first and second user's terminal is synthesized, and map data chosen based on the location information from the data base, when providing the location information, is approved. The generated map information is displayed at least on the first user's terminal.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: June 20, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hidehiko Aoki
  • Patent number: 6954613
    Abstract: Shows orbit-constellation of satellites that appears virtually geosynchronous.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: October 11, 2005
    Assignee: Virtual Geosatellite Holdings, Inc.
    Inventors: David Castiel, Jack Anderson, John E. Draim
  • Patent number: 6944450
    Abstract: This disclosure provides a communications system using a span-loaded flying wing, traveling at relatively slow speeds, that can remain airborne for long periods of time. The communications system uses the airplane as a long term high altitude platform that can serve at lest one of a number of potential functions. One function is to link to a ground station using radio wave signals and a satellite using optical signals. Another function is to serve as a relay station between ground communication nodes and individual end-users. Because the aircraft can tightly hold a station, the end-user's antennas do not need to be continuously adjustable. For such a system, a large number of aircraft can be used, with the end-user antennas being configured for a narrow beamwidth so as to allow frequency reuse for different communication links.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: September 13, 2005
    Assignee: Aerovironment, Inc.
    Inventor: Earl C. Cox
  • Patent number: 6853894
    Abstract: The present invention relates to a global network based vehicle safety and security system and method. In this regard, a global network based data processing resource can wirelessly data communicate with an in-vehicle device to control and monitor vehicle safety and security. In addition, data communicated between the vehicle and global network based data processing resources can control, monitor, and track the vehicle as well as data communicate command and control functions, such as disabling vehicle operation. Furthermore, alarm and alerting functions can effectuate the notification of other data processing resources and or other agency or emergency resources. Vehicle and in-vehicle device data, including safety and security data gathered at data processing resources can be utilized to effectuate a wide variety of data dissemination. Such data dissemination can include warning, alarm, safety, or security determinations, and or other reporting or analysis related to vehicle safety and or security.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: February 8, 2005
    Assignee: USA Technologies, Inc.
    Inventor: H. Brock Kolls
  • Patent number: 6824107
    Abstract: A transmission or communication system, wherein plural individual elliptical orbits are so defined that an individual right ascension of a north-bound node is established with a designated angle. An artificial satellite is travels on a respective ones of the plural individual elliptical orbit and a group of artificial satellites arranged on respective ones of the plural individual elliptical orbits are used so that at least one of the artificial satellites having a communication system is always viewable within a pre-defined range of operational elevational angle in a zenith direction from a service area. The group of artificial satellites are on respective orbits obtained by combining an inclination angle and an eccentricity squared of the individual elliptical orbit so that a right ascension of north-bound node is a designated angle and a time period during which respective ones of the group of artificial satellites is viewable from ground is substantially identical.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: November 30, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Toshihide Maeda, Nobuo Hamano, Shigeki Nakamura, Tomiharu Yoshida, Masataka Owada, Masahiko Ikeda, Takashi Yabutani, Masahiro Ito
  • Patent number: 6795687
    Abstract: 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 satellite is virtually geosynchronous during its apogee portion, over the region of interest. When it leaves the apogee portion, the satellite goes to another of the regions of interest, and acts virtually geosynchronous over that region.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: September 21, 2004
    Assignee: Virtual Geosatellite LLC
    Inventors: David Castiel, John Draim, Kenneth F. Manning
  • Patent number: 6795771
    Abstract: A method and apparatus for correlating a satellite signal with a reference code is described. In an example, samples of a satellite signal having a repeating code are received. At least one fast convolution between the samples and the pseudorandom reference code is performed. A correlation peak is detected within a result of the at least one fast convolution. A code phase of the repeating code relative to the pseudorandom reference code is estimated at the correlation peak. The samples are then correlated with the pseudorandom reference code using the code phase as an initial value.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: September 21, 2004
    Assignee: Global Locate, Inc.
    Inventors: Donald L. Fuchs, Charles Abraham, Frank van Diggelen
  • Patent number: 6781968
    Abstract: 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 topology for the geographic area. The atmospheric platform carries a payload that comprises communications equipment. The system further includes a plurality of user equipment units located within the geographic area and at least one ground station or gateway for providing an information pathway between the user equipment units. The gateway has network processing and switching equipment for routing the information between the users. A wireless trunkline carries signals between the gateway and the atmospheric platform. The apparatus and method comprise gateway and payload uplink portions and downlink portions. The downlink portions aggregates and de-aggregates user generated information from the platform to the gateway.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: August 24, 2004
    Inventors: Nicholas J. Colella, George G. Chadwick
  • Patent number: 6683565
    Abstract: A method of determining the position of geostationary satellites by means of signals of at least one navigation satellite. A determination is made of data concerning the transit times of the signals from the at least one navigation satellite to the geostationary satellite by a device of the geostationary satellite, and a determination is made of navigation data of the at least one navigation satellite by an independent navigation device. A determination is made of data concerning the system time of the at least one navigation satellite by an independent navigation device, and a data exchange occurs between the geostationary satellite and the navigation device in order to determine position data of the geostationary satellite from the transit times, the navigation data as well as the system time of the at least one navigation satellite.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: January 27, 2004
    Assignee: Astrium GmbH
    Inventors: Walter Fichter, Mark Hartrampf