Including A Satellite Patents (Class 342/352)
  • Patent number: 7889122
    Abstract: A method and system for taking direct measurements of GNSS signal's arrival angle to remotely measure the atmospheric variables used for weather prediction. More specifically, an improved method and system for obtaining and processing accurate information regarding the weather and other atmospheric changes by measuring the total refractive bending angle of the GNSS signal. For mobile platforms on which receivers are mounted, phased array receivers are used to allow precise measurements of GNSS arrival angles. By measuring the refractive bending angle, more accurate and cost-efficient measurements of atmospheric changes are obtained, thereby resulting in more accurate predictions of the weather.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: February 15, 2011
    Assignee: The Boeing Company
    Inventor: Brian J. Tillotson
  • Publication number: 20110018758
    Abstract: An antenna feed assembly is provided which includes at least two elongate feed chains lying adjacent one another. Each feed chain is adapted to transmit or receive electromagnetic radiation between itself and the antenna along a longitudinal feed axis thereof via a transmit/receive element. The feed chains are held in fixed lateral relationship to one another by first and second mountings spaced apart axially of the feed chains. The transmit/receive elements extend axially from the first mounting towards the antenna and the second mounting is positioned on a side of the first mounting remote from the antenna. The first mounting has a lower coefficient of thermal expansion in the lateral direction than the second mounting whereby translational movement of each transmit/receive element in the lateral direction owing to temperature change of the assembly will be reduced.
    Type: Application
    Filed: February 27, 2009
    Publication date: January 27, 2011
    Applicant: ASTRIUM LIMITED
    Inventor: Timothy John Ecclestone
  • Patent number: 7830982
    Abstract: An apparatus comprises a plurality of antenna elements, a plurality of digital signal processing devices for supplying phase-and-amplitude-weighted digital baseband signals, a beamforming processor for processing the weighted digital baseband signals to adaptively form a plurality of beam patterns for the antenna elements, a plurality of digital modulators for converting the digital baseband signals into intermediate frequency digital signals, and a modulator for modulating in-phase and quadrature components of the intermediate frequency digital signals to produce composite radio frequency output signals for the antenna elements. Receiving apparatus, and methods of transmitting and receiving a plurality of signals on a plurality of antenna elements are also provided.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: November 9, 2010
    Assignee: Northrop Grumman Systems Corporation
    Inventor: David Keith Mesecher
  • Publication number: 20100259443
    Abstract: The present invention relates to an antenna system mounted on a mobile vehicle. In the present invention, a power distributor and a part of a high-frequency module that includes a frequency converter are placed in an external fixed unit that is placed outside a radome. In addition, an active cooler/cooling fin, a heater, and an air circulation fan are placed at an internal bottom plane of the antenna system, and a cooling fin and cooling fan are placed at an external bottom plane of the antenna system.
    Type: Application
    Filed: August 21, 2008
    Publication date: October 14, 2010
    Applicant: Electronics and Telecommunications Research Instit ute
    Inventors: Chang Soo Kwak, In Bok Yom, Ho Jin Lee
  • Patent number: 7792639
    Abstract: Methods and systems consistent with the present invention provide a host based positioning system. The host based positioning system includes a tracker hardware interface that connects to a dedicated hardware space vehicle tracker. The tracker hardware interface receives positioning information from the space vehicle tracker. The host based positioning system also includes a memory that includes a GPS library having a user interface, a tracker interface, and an operating system interface. A processor runs functions provided by the interfaces.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: September 7, 2010
    Assignee: SiRF Technology Inc.
    Inventors: Clifford Yamamoto, Sebastian Nonis, Ashutosh Pande, Nikola Bulatovic, Stefan Witanis
  • Patent number: 7773942
    Abstract: According to one embodiment, a method for use in managing satellite communications includes: receiving, at a first earth-based gateway antenna system, one or more microwave communication signals from a substantially geostationary satellite; monitoring for a performance change in at least one signal from the satellite; and, in response to detecting a performance change in the at least one signal, transmitting instructions to the satellite to transmit at least a portion of the one or more microwave communication signals to a second earth-based gateway antenna system.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: August 10, 2010
    Assignee: Wildblue Communications, Inc.
    Inventors: Erwin C. Hudson, Remberto L. Martin
  • Publication number: 20100194639
    Abstract: This invention relates to the troposphere delay produced when the electromagnetic waves from a satellite or astronomical pass through the troposphere, in particular, it is related with the calculation method of a estimated value of the amount of zenith troposphere delay to real time, and troposphere delay of the satellite positioning signal in the case of positioning using the estimated value of this calculated amount of zenith troposphere delay is related with a correcting method.
    Type: Application
    Filed: December 28, 2007
    Publication date: August 5, 2010
    Inventors: Noboru Takeichi, Takeyasu Sakai, Sounosuke Fukushima, Ken Ito
  • Patent number: 7756490
    Abstract: A method of providing communications can be provided by at least one space-based and/or terrestrial component of a first system/operator transmitting/receiving information using spectrum allocated to a second system/operator at an aggregate interference level at a space-based component of the second system/operator that is less than or substantially equal to a predetermined threshold. Related other methods, systems, and radioterminals are also disclosed.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: July 13, 2010
    Assignee: ATC Technologies, LLC
    Inventor: Peter D. Karabinis
  • Publication number: 20100171652
    Abstract: Various techniques are provided for calibrating a frequency of a local clock using a satellite signal. In one example, a method of transferring frequency stability from a satellite to a device includes receiving a signal from the satellite. The method also includes determining a code phase from the satellite signal. The method further includes receiving aiding information. In addition, the method includes calibrating a frequency of a local clock of the device using the code phase and the aiding information to substantially synchronize the local clock frequency with a satellite clock frequency.
    Type: Application
    Filed: January 6, 2009
    Publication date: July 8, 2010
    Inventors: Gregory M. Gutt, David A. Whelan, Barton G. Ferrell, Robert W. Brumley, Christopher J. Martens, Anne T. Haddad
  • Patent number: 7751779
    Abstract: A payload (108) to be mounted onto a satellite (102) can include a first steerable antenna (302) providing a downlink to and an uplink from a first user terminal; a second steerable antenna (304) providing a downlink to and an uplink from a second user terminal; a switching network (306) coupling the first steerable antenna to the second steerable antenna; and a payload control unit (120) controlling the switching network to select one of the downlink to the first user terminal provided by the first steerable antenna and the downlink to the second user terminal provided by the second steerable antenna, and one of the uplink from the first user terminal provided by the first steerable antenna and the uplink from the second user terminal provided by the second steerable antenna.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: July 6, 2010
    Assignee: Northrop Grumman Space & Mission Systems Corp.
    Inventors: Hau H. Ho, Ethan A. Stein, Michael Fashano, Peter J. Hadinger, Gary Lehto
  • Patent number: 7746828
    Abstract: Aeronautical broadband communication is enhanced by providing an apparatus having a first antenna configured to communicate using a signal orientation corresponding to a first polarization, and a second antenna configured to communicate using a signal orientation corresponding to a second polarization, where the second polarization has at least one characteristic difference from the first polarization. Additional antennas may be used, where multiple antennas share one polarization, and multiple other antennas share a different polarization, and signals from like-polarized antennas are combined for beam-formation.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: June 29, 2010
    Assignee: QUALCOMM Incorporated
    Inventor: Ahmad Jalali
  • Publication number: 20100141526
    Abstract: A method, apparatus and system for aligning an antenna reflector with satellites in a satellite configuration. A method in accordance with the present invention comprises aligning the reflector in azimuth and elevation with a first signal transmitted by a first satellite in the satellite configuration, and aligning the reflector in tilt with a second signal transmitted by a second satellite in the satellite configuration, wherein aligning the reflector in azimuth and elevation with the first signal and in tilt with the second signal aligns the reflector with at least a third signal transmitted from a third satellite.
    Type: Application
    Filed: February 12, 2010
    Publication date: June 10, 2010
    Applicant: THE DIRECTV GROUP, INC.
    Inventors: John Norin, Kesse Ho, Mike A. Frye, Gustave Stroes
  • Patent number: 7725289
    Abstract: An uniaxial acceleration sensor senses an acceleration. An analog to digital (AD) converter converts the acceleration into a digital sensor value. A square-value calculating unit calculates a square value of the sensor value. A zero-point determining unit determines whether the square value is zero and every time the square value becomes zero, instructs an energy calculating unit to output energy. The energy calculating unit calculates the energy by integrating the square value. Upon receiving instructions to output the energy, the energy calculating unit outputs the stored energy to a threshold comparing unit. The threshold comparing unit compares the energy with a predetermined threshold. A tentative walking processing unit counts the number of times the energy is equal to or larger than the predetermined threshold. A step calculating unit calculates steps by dividing a counter value of the tentative walking processing unit by two.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: May 25, 2010
    Assignee: Fujitsu Limited
    Inventors: Fumio Nagashima, Yoshiro Hada
  • Publication number: 20100123620
    Abstract: Disclosed are a non geostationary satellite orbit (NGSO) communication apparatus that extends an operation time using an ancillary territory component (ATC) and reduces a number of satellites, and an ATC and an operating method thereof. The NGSO communication apparatus for extending an operation time using an ATC and reducing a number of satellites may include a first ATC that communicates with a mobile earth station (MES), and a second ATC that communicate with the first ATC to relay data between the MES and the satellite when the first ATC is unable to communication with the satellite revolving along an orbit.
    Type: Application
    Filed: April 21, 2009
    Publication date: May 20, 2010
    Inventors: Dae Sub OH, Do-Seob AHN, Ho Jin LEE
  • Publication number: 20100117893
    Abstract: A reflector antenna, in particular for the reception and/or transmission of signals from and/or to satellites. The reflector antenna according to the invention comprises a reflector arrangement for focusing antenna radiation in a focal plane together with an antenna array arranged in the focal plane, or in the vicinity of the focal plane, with a plurality of antenna elements. A control device is provided with a beamforming means. Through the control device, sub-arrays, comprising one or a plurality of antenna elements of the antenna array for the reception and/or transmission of antenna radiation, can be activated and deactivated. In the operation of the reflector antenna, a radiation lobe pattern is formed by means of the beamforming means for the reception and/or transmission of antenna radiation for a particular activated sub-array.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 13, 2010
    Inventors: Achim Dreher, Christoph Gunther
  • Publication number: 20100117903
    Abstract: Methods of operating a transceiver including an antenna having a plurality of antenna feed elements are presented. The methods include defining a plurality of antenna gain constraint values gk associated with K geographic constraint points within a geographic region, iteratively generating M antenna feed element weights wM that result in antenna response values fK at the K geographic constraint points based on the corresponding antenna gain constraint values gK, forming an antenna beam from the antenna to the geographic region using the antenna feed element weights wM, and communicating information over the antenna beam. Related transceivers, satellites, and satellite gateways are also disclosed.
    Type: Application
    Filed: October 22, 2009
    Publication date: May 13, 2010
    Inventor: Dunmin Zheng
  • Patent number: 7706975
    Abstract: A mobile station database of cellular identifications and associated position information is stored in mobile station memory. The mobile station uses the position information in the database to assist in determining a current position for the mobile based on an identifier, such as cell ID, base station BSIC, PSC, or carrier frequency. A satellite vehicle signal is searched in an uncertainty region that is a function of position information associated with the current identifier. The uncertainty region can be limited by assumed platform dynamics via predefined velocity and acceleration information. Time maintenance for the mobile station can also be achieved through known approximate position from the position database and measurement of a single satellite vehicle propagation delay. The mobile station can compare a position determination obtained through satellite vehicle signals with position database information to determine the validity of that position.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: April 27, 2010
    Assignee: Qualcomm Incorporated
    Inventors: Dominic Gerard Farmer, Suzanne Arcens
  • Patent number: 7702657
    Abstract: A portable information processor (10) includes a storage unit (11) that stores information; a connecting unit (12) that connects to one of the device (1 (or 2)); an information acquiring unit (13) that acquires information from the connected device (1 (or 2)); an operation information generating unit (14) supplied with a driving power from a power source of the connected device (1 (or 2)) and generating operation information relating to the predetermined operation executable by the connected device (1 (or 2)) based on device identification information and the acquired information acquired by the information acquiring unit (13), and the information stored in the storage unit (11); and a control unit (15) that controls the connected device (1 (or 2)) based on the operation information generated by the operation information generating unit (14).
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: April 20, 2010
    Assignee: Pioneer Corporation
    Inventors: Tsuyoshi Sato, Yoshiya Nonaka, Takeharu Arakawa, Masashi Tanabe, Hitoshi Ando, Tadahiro Miyoshi, Haruhiko Takagi, Motoyuki Yamashita, Kazuyuki Uchiyama
  • Publication number: 20100085247
    Abstract: A device can access scaled values and scaling factors, which are used to convert the scaled values into coefficients and residuals. The coefficients and residuals can in turn be used with time-dependent functions to reconstruct predicted ephemeris data, including clock correction data, for satellite navigation system satellites. Ephemeris data that is broadcast from any of the satellites can be used to update the calculated ephemeris data.
    Type: Application
    Filed: October 8, 2008
    Publication date: April 8, 2010
    Inventors: Sai VENKATRAMAN, Janne JARVENPAA, Qinfang SUN
  • Patent number: 7693659
    Abstract: A satellite navigation system using multiple antennas for providing the position of multiple fiduciary points on an object even when fewer than four satellites are visible to some or all the antennas. Satellite signals from the multiple antennas are fed into at least one receiver. The receiver or receivers utilize constraint information, which is independent of the satellite signals. These external constraints are used to augment the signals received from the satellites, to obtain the position solution for each antenna. In a preferred embodiment, a common reference clock is used to provide an external constraint. Examples of other external constraints that can be used in the current invention are distance between the antennas, inertial measurement of attitude, rotational or linear position sensors, etc.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: April 6, 2010
    Assignee: Novariant, Inc.
    Inventors: Kurt R. Zimmerman, Dave Lawrence, Michael L. O'Connor, Paul Montgomery
  • Patent number: 7679550
    Abstract: A method for propagating ephemeris data for a satellite in Earth orbit is provided. The method includes the steps of receiving orbital positional data for a first time period of a satellite's Earth orbit, propagating orbital positional data for the satellite's Earth orbit during a second time period extending beyond the first time period, fitting a Keplerian ephemeris model to the propagated orbital positional data to estimate model coefficients, and sending the estimated model coefficients to receivers for determination of receiver position at a time during the second time period.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: March 16, 2010
    Inventors: James L. Garrison, Brenda E. Eichel
  • Publication number: 20100045510
    Abstract: A system for accurate automatic satellite acquisition by a portable satellite terminal. The system includes a software program that coordinates inputs from several measurement aids to control antenna position. These aids include a GPS receiver, antenna azimuth, elevation and polarization angle sensors, and the terminal's modem, DVB receiver and spectrum analyzer, which contains a beacon detector also serving as Receive Signal Strength Indicator (RSSI). For satellite recognition, the spectral analysis and RSSI function are complemented by the lock/unlock indications provided by the modem and the DVB receiver. Under the control of the software program, the modem, DVB receiver and spectrum analyzer, in conjunction with an extensive database of satellites and their signal characteristics, provide the means for reliable validation of final alignment.
    Type: Application
    Filed: July 25, 2006
    Publication date: February 25, 2010
    Inventors: Jason Lopez, Glen Dwornik, Petrus Bezuidenhout, Michael Schefter, Stanislav Kouzmine, Sasa Trajkovic
  • 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
  • Publication number: 20090289839
    Abstract: 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 pass on the forward channels. They system further comprises a plurality of domains that are independently managed and a plurality of satellite modems with the service spot beams. The plurality of sub-channels may be divided among the plurality of domains. Each of the domains may correspond to a plurality of time slices. A scheduler may allocate forward channels among the plurality of domains. Each of the time slices corresponding to the plurality of domains may vary in size over time.
    Type: Application
    Filed: March 26, 2009
    Publication date: November 26, 2009
    Applicant: ViaSat, Inc
    Inventor: Jeffrey M. McDaniel
  • Patent number: 7616682
    Abstract: Chronologically synchronizing a unique positing signal generated by a positioning-unit device at a known location with a reference positioning signal generated by a reference transmitter at a known geometric distance. The positioning-unit device receives and interprets a reference positioning signal. It then generates and transmits a unique positioning signal, wherein the unique positioning signal is aligned with a frequency steerable clock. The positioning-unit device then receives the unique positioning signal. The positioning-unit device then adjusts the frequency of the frequency steerable clock by an amount derived from a measured frequency difference. The positioning-unit device then determines a reference positioning signal propagation delay between the reference transmitter and the positioning-unit device. At this stage, a time difference is measured between the received reference positioning signal and the received unique positioning signal.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: November 10, 2009
    Assignee: Locata Corporation Pty Ltd.
    Inventor: David Small
  • Patent number: 7606567
    Abstract: A method for allocating transmission channels to devices configured to communicate short data packets to a diversity of non geostationary satellites is disclosed hereby. The method suggests a dynamic cellular partitioning of the earth surface, based on the smallest intersections of overlapping satellite service areas (“footprints”), defined as mega-cells, and reusing channels in different mega-cells. In addition, a transmission cycle is defined and divided to time slots, synchronized at each device by GPS timing signals, and mega-cells served by more satellites are allocated with fewer time slots, in order to increase the chance of transmitters placed in mega-cells served by fewer satellites to be detected. Further, each mega-cell is divided to cells, and different channels and time slots are allocated to each cell, from those allocated to the corresponding mega-cell.
    Type: Grant
    Filed: May 1, 2008
    Date of Patent: October 20, 2009
    Inventor: Daniel A. Katz
  • Patent number: 7606531
    Abstract: A repeating station, a communication apparatus, and an antenna directivity control method are disclosed. The repeating station includes a first antenna group including at least one antenna element, a second antenna group that is different from the first antenna group, the second antenna group including two or more antenna elements adjusted so that radiation in the direction of the first antenna group is reduced, wherein the second antenna group is adjusted such that radiated power in the direction of the first antenna group is reduced.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: October 20, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takahiro Asai, Tatsuo Furuno, Tetsu Tanaka, Hirohito Suda
  • Publication number: 20090256741
    Abstract: A ground surface as an image acquiring object is acquired by a synthetic aperture radar mounted on an artificial satellite at a usual time before occurrence of a disaster and thereby radar image data are obtained. After the occurrence of the disaster, an image of the ground surface as the image acquiring object is acquired within days shorter than the number of orbit returning days and by comparing this radar image data with the radar image data acquired at the usual time so as to try to early grasp a damaged situation. At a recovering and rebuilding time after the occurrence of the disaster, images of the image acquiring object are periodically acquired so as to prepare a recovering and rebuilding plan and prevent secondary disasters.
    Type: Application
    Filed: August 3, 2007
    Publication date: October 15, 2009
    Inventors: Takashi Shibayama, Takashi Nonaka, Yoichi Sugimoto
  • Patent number: 7592955
    Abstract: A system and methods for calculating a range to a turbulent air region from an antenna platform is disclosed. The methods determine a correlation lag value corresponding to a time shift in receiving propagation of an interference pattern traveling along a path that is subject to the turbulent air region at antennas responsive to incident electromagnetic energy. Based upon the correlation lag value, the methods calculate the range to the turbulent air region from the antenna platform and issue a warning that indicate the range.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: September 22, 2009
    Assignee: The Boeing Company
    Inventors: Brian J. Tillotson, Marissa Singleton
  • Publication number: 20090231188
    Abstract: A system and method of providing a clock signal to a navigation satellite receiver in a device is disclosed. A clock signal generated by a voltage controlled temperature compensated crystal oscillator (VCTCXO) in a cellular engine of the same device is appropriated to clock a numerically controlled oscillator (NCO) programmed to generate an adjusted clock signal suitable for use in receiving signals from navigation satellites and to heterodyne them down to baseband or an intermediate frequency for processing. Preferably, if the cellular engine has an automatic frequency control (AFC) module for adjusting the voltage control input to the VCTCXO to compensate for a change in the operating environment of the cellular engine, the AFC module modifies the control word in the NCO to counteract such adjustment so that the adjusted clock signal provided to the navigation satellite receiver is not unduly impacted.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 17, 2009
    Inventors: Mamdouh YANNI, Sean SIMMONS
  • Publication number: 20090231186
    Abstract: A satellite antenna terminal includes a circuit board having first and second opposite surfaces. A plurality of antenna elements are disposed on the first surface of the circuit board and are operative to receive Radio Frequency (RF) signals from a satellite. One or more signal processing devices are disposed on the second surface of the circuit board and are coupled to process the RF signals received by the antenna elements.
    Type: Application
    Filed: February 3, 2009
    Publication date: September 17, 2009
    Inventors: Ilan Saul Barak, Mario Gachev, Victor Boyanov, Borislav Petkov Marinov, Vesselin Peshlov, Rossen Stoyanov
  • Publication number: 20090231187
    Abstract: Beamforming methods for operating a transceiver including an antenna having a plurality of antenna feed elements include defining a plurality of real valued antenna gain constraint values associated with a plurality of geographic constraint points within a geographic region, and generating complex valued antenna feed element weights that result in complex antenna gain values at the geographic constraint points based on the corresponding real valued antenna gain constraint values. An antenna beam is formed from the antenna to the geographic region using the complex valued antenna feed element weights, and information is transmitted over the antenna beam.
    Type: Application
    Filed: February 12, 2009
    Publication date: September 17, 2009
    Inventor: Gary G. Churan
  • Publication number: 20090195444
    Abstract: Techniques for monitoring transmission performance of a satellite communications systems are provided, including techniques for measuring the primary contributors to the end-to-end SNR, including the uplink SNR, the downlink SNR, and the C/I for each link in the network. These individual measurements are used to estimate satellite effective isotropic radiated power (EIRP), satellite antenna gain-to-noise-temperature (G/T), and loss due to an Earth Terminal pointing error. The EIRP, satellite antenna G/T and loss due to Earth terminal pointing error may then be used to determine operating parameters for the satellite communications network that enable the network to operate more efficiently.
    Type: Application
    Filed: January 28, 2009
    Publication date: August 6, 2009
    Applicant: ViaSat, Inc.
    Inventor: Mark J. Miller
  • Publication number: 20090195443
    Abstract: Authentication of a signal, signalA, that is provided as having been received from a source at a first global location by comparing it to a signal that is received from the source at a second global location, signalB, where signalB contains an unknown signal that is unique to the source, and determining, that signalA contains the same unknown signal that is contained in signalB.
    Type: Application
    Filed: February 2, 2008
    Publication date: August 6, 2009
    Inventors: Peter Levin, David S. De Lorenzo, Per K. Enge, Sherman C. Lo
  • Publication number: 20090160701
    Abstract: Provided is an apparatus and method for identifying a target satellite in a satellite communication antenna. The apparatus includes: a power splitting unit for splitting a signal inputted through the satellite communication antenna to more than two signals; a tuner unit for receiving the split signals from the power splitting unit and passing only signal of a predetermined channel frequency band; an analog-to-digital converting unit for converting each of signal intensities passed in the tuner unit to a digital value; and a controlling and identifying unit for determining whether a satellite traced by the satellite communication antenna is a target satellite using each of the signal intensities of the predetermined channel frequency band inputted from the A/D converting means, and controlling an orientation direction of the satellite communication antenna.
    Type: Application
    Filed: September 28, 2005
    Publication date: June 25, 2009
    Inventors: Seong-Ho Son, Ung-Hee Park, Soon-Young Eom, Soon-Ik Jeon
  • Patent number: 7551124
    Abstract: A method for optimizing at least one property of a satellite system. The system has a satellite provided with a transmitter for transmitting a satellite signal that represents data. The satellite further has a satellite receiver for receiving the satellite signal. The method involves receiving the satellite signal, via the satellite receiver; determining the data from the satellite signal so received; checking the data for data errors; and changing the at least one property of the satellite system if a result of the checking satisfies a predetermined criterion.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 23, 2009
    Assignee: Stichting ASTRON
    Inventor: Jacobus Adrianus Kegel
  • Publication number: 20090121928
    Abstract: The subject matter disclosed herein relates to suppressing the effects of multipath signals. For an example, a signal comprising at least one binary offset carrier (BOC) modulation signal is received. The BOC modulation signal is modulated with a pseudorandom noise sequence comprising a plurality of chips, wherein each of the chips has a set interval. The received signal is correlated with portions of the plurality of chips to provide a power signal and to remove at least a portion of a multipath component in the received signal from the power signal. The portions of the chips are less than the set interval.
    Type: Application
    Filed: November 12, 2007
    Publication date: May 14, 2009
    Inventor: Rayman Wai Pon
  • Publication number: 20090121931
    Abstract: The present invention discloses a wrist-worn wireless communication device coupled with an RF antenna configured to operate folded or coiled in the device, or extended along the arm from wrist to elbow. A typical embodiment of the invention relates to an emergency radio beacon, particularly for satellite based systems such as a Personal Locator Beacon (PLB) for the Cospas-Sarsat system.
    Type: Application
    Filed: November 12, 2007
    Publication date: May 14, 2009
    Inventor: Daniel A. Katz
  • Patent number: 7532860
    Abstract: A system and a methodology uses data provided from consumer terminals in a satellite system to reconfigure a satellite to thereby optimize the strength of signals transmitted by the satellite. The data from the consumer terminals may be used to provide diagnostic information about the reception of signals at various points in an area covered by a satellite broadcasting system and to compensate for attenuation of signals transmitted by the satellite due to weather storms, or other atmospheric conditions. Such use of consumer terminals eliminates the need to place expensive monitoring stations throughout an area covered by a satellite broadcasting system, resulting in substantial reduction in overall system cost. Additionally, given the widespread distribution of consumer terminals, greater monitoring coverage is achieved than with a limited number of monitoring stations.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: May 12, 2009
    Assignee: The DIRECTV Group, Inc.
    Inventor: Patrick J. Loner
  • Publication number: 20090103452
    Abstract: An ad-hoc secure communication network and methods of communicating with a fleet of vehicles using the ad-hoc communication network is provided. The method includes communicating relatively long range communication signals to a fleet router. The fleet router is a select one of the vehicles in the fleet. The method further includes forming an ad-hoc communication network between the fleet vehicles to communicate relatively short range communication signals between the vehicles in the fleet. Wherein each vehicle in the fleet uses surveillance information to determine the network topology and each vehicle routes messages based on the discovered network topology.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventor: John M. Horvath
  • Publication number: 20090102706
    Abstract: A satellite interference canceling system cancels the interference between two or more signals received by a satellite receiver. The signals can be two signals experiencing cross polarization interference or signals that experience interference from other satellite signals. Gain and phase are applied to the received signals and then combined with the other signals to result in cancellation by subtraction. The gain and phase values needed to cancel the interference are derived from measurements of carrier-to-noise ratio (C/N) as an indication of the interference level. The C/N can be measured in the set-top box indoor unit. Coherency restoration is performed in receivers that downconvert the signals before performing interference cancellation.
    Type: Application
    Filed: June 29, 2007
    Publication date: April 23, 2009
    Applicant: Entropic Communications Inc.
    Inventors: Jeremy Goldblatt, Keith Bargroff, Branislav Petrovic
  • Patent number: 7515874
    Abstract: The present invention provides a short-range wireless mobile communication system with a first terminal and a mobile terminal that are each adapted for transmitting and receiving an information carrying signal wave, whereby at least the first terminal or the mobile terminal comprise a directional signal wave converter for transmitting and/or receiving the information carrying signal wave with a directional characteristic and a control means for controlling the directional characteristic according to a position of the mobile terminal relative to the first terminal.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: April 7, 2009
    Assignee: Sony Deutschland GmbH
    Inventors: Vladimir Nikolajevic, Masahiro Uno
  • Publication number: 20090051588
    Abstract: A device (D) is dedicated to transmitting and/or receiving signals representative of data in a communication satellite (SAT) having a fixed frequency bandwidth. This device (D) comprises transmission and/or reception means (MER) responsible for sending and/or receiving signals in multiple beams, and control means (MC) responsible for defining a chosen number of cells of chosen dimensions and positions, and configuring the transmission and/or reception means (MER) so as to define beams each associated with at least one of the defined cells, with a chosen carrier frequency based on the requirements of each of the cells and taking into account the frequency bandwidth available on the satellite (SAT).
    Type: Application
    Filed: September 22, 2006
    Publication date: February 26, 2009
    Applicant: Thales
    Inventors: Jean-Didier Gayrard, Eric Belis
  • Publication number: 20090051589
    Abstract: A satellite communication system for providing communications between user terminals and gateways constituted with m primary satellites. In one embodiment, n back up satellites are also provided. Further, each satellite, primary or back-up, is equipped to project N/m beams onto and across an area in a loosely-packed array manner. M of the m primary and n back-up satellites collectively create N beam spots to cover the area. Moreover, each sub-area is covered by a beam spot separated from another sub-area covered by another beam spot by one beam width. Each satellite is also equipped to facilitate communication over 1 of m band of frequencies on one beam. AS a result, any of the m primary satellites may be efficiently replaced on demand by a selected one of the n back-up satellites. The gateways and user terminals are configured to communicate signals through or with both or either the primary and back-up satellites.
    Type: Application
    Filed: May 23, 2008
    Publication date: February 26, 2009
    Inventors: Leonard N. Schiff, David S. Miller
  • Patent number: 7492810
    Abstract: A method and an apparatus is disclosed for efficient cross correlation of a plurality of signal vectors. Incoming data is partitioned into several segments and processed according to an algorithm where data rotation is a function of post-correlation memory size.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: February 17, 2009
    Assignee: General Electric Company
    Inventor: Daniel D. Harrison
  • Publication number: 20090027260
    Abstract: A method for communicating with a satellite using a plurality of antennas is provided according to some embodiments of the disclosure. These methods may include receiving data from the satellite using a first antenna from the plurality of antennas and determining the signal strength of the signal detected from the first antenna. Data may be transmitted to the satellite using the first antenna. A second antenna adjacent to the first antenna may partially overlap with the first antenna in coverage. The signal strength of the signal detected from the second antenna may be monitored. If the signal strength of the signal detected from the second antenna is greater than the signal strength of the signal detected from the first antenna, then data is transmitted over the second antenna.
    Type: Application
    Filed: July 17, 2008
    Publication date: January 29, 2009
    Applicant: ViaSat, Inc.
    Inventors: Donald L. Runyon, Anthony Guy Hamel, Timothy J. Martin, William Joshua Sparks
  • Publication number: 20090021424
    Abstract: Systems and methods according to embodiment of the present invention prevent or otherwise mitigate data corruption and interference that may result when a communications on-the-move transmission is blocked by a radio relay link antenna transmitting on a shared frequency band. Harmful radiation that could affect persons blocking the line-of-sight of a COTM transmission is also prevented or mitigated. According to one embodiment of the present invention, if a building or other obstruction blocks the line-of-sight between a COTM antenna and a target satellite, the transmission will automatically cease, preventing or minimizing any potential interference that can occur, such as the interference to a radio relay link antenna operating atop a building. Similarly, persons who may have been in the line-of-sight will not be subjected to harmful radiation. COTM transmission remains offline until free line-of-sight is re-established.
    Type: Application
    Filed: July 17, 2007
    Publication date: January 22, 2009
    Inventors: Per Wahlberg, Kennet Lejnell
  • Publication number: 20090002233
    Abstract: Methods and apparatuses for searching for satellite signals are provided. One of the proposed methods of searching for satellite signals includes: searching for satellite signals according to measurement predictions; searching for satellite signals of a reference satellite without referring to the measurement predictions; determining if measurements derived from the reference satellite are consistent with the measurement predictions; and searching for satellite signals of other satellites without referring to the measurement predictions if the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions. If the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions, navigation information for use in the generation of the measurement predictions is determined to be stale.
    Type: Application
    Filed: June 27, 2007
    Publication date: January 1, 2009
    Inventors: Kung-Shuan Huang, Wen-Cheng Lai, Hsin-Chung Yeh
  • Publication number: 20080297406
    Abstract: A fast and efficient automated satellite constellation detection process can be implemented at least in part independent of in-band data in the satellite signal. The automated detection process iterates through a set of various predefined transponder settings to detect one or more accessible satellite constellations through each satellite dish connected directly or through a switch to a satellite receiver. The process determines whether the satellite receiver is able to lock onto a satellite signal at each transponder setting. Based on the combinations of which satellite constellations are available at each transponder setting, the process allocates a specific satellite constellation to each satellite dish. In one implementation, channel information can be used to further refine the detection and identification of accessible satellite constellations for each satellite dish.
    Type: Application
    Filed: June 1, 2007
    Publication date: December 4, 2008
    Applicant: Microsoft Corporation
    Inventors: Lucian Dragne, Rathe Hollingum, Gunther Logemann, Lorcan Mooney
  • Patent number: 7459984
    Abstract: The invention provides a method and apparatus to optimally estimate and adaptively compensate the temperature-induced frequency drift of a crystal oscillator in a navigational signal receiver. A Read-Write memory encodes two tables, one for looking up frequency drift values versus temperature readings and another one for valid data confirmation on the first table. The initially empty look-up table is gradually populated with frequency drift values while the receiver computes the frequency drift along with its position. During initial start of the receiver or re-acquisition of satellite signals, the stored frequency drift value corresponding to the current temperature is used. If no valid frequency drift value is available, the frequency drift value is computed based on the existing frequency drift values in the table. This invention reduces the Time-To-First-Fix (TTFF) of the receiver and enables the receiver to self-calibrate, thus no additional factory calibration would be necessary.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: December 2, 2008
    Assignee: Sirf Technology Holdings, Inc.
    Inventors: Chi-Shin Wang, Kudrethaya A. Shridhara, Jun Mo, Shaowei Han, Hansheng Wang