Patents Examined by Gregory C. Issing
  • Patent number: 11125889
    Abstract: The present invention discloses methods of accuracy improving for code measurements in GLONASS GNSS receivers. One component of error budget in code measurements of GLONASS receivers is caused by a difference in signal delays arising in the receiver analog Front End and antenna filter on different channel frequencies specific to GLONASS satellites. Methods to compensate for differences in delays for different GLONASS channel frequencies have been proposed using data collected from a GLONASS signals simulator.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: September 21, 2021
    Assignee: Topcon Positioning Systems, Inc.
    Inventors: Vladimir Victorovich Veitsel, Andrey Vladimirovich Veitsel, Konstantin Vladimirovich Chereshnev
  • Patent number: 11125890
    Abstract: The invention relates to a method carried out by a navigation satellite system (NSS) receiver or a processing entity receiving data therefrom, for estimating parameters useful to determine a position. The NSS receiver observes NSS signals from NSS satellites over multiple epochs. A filter, called “precise estimator”, is operated, which uses state variables, makes use of NSS signals observed by the NSS receiver, and computes its state variable values based on observations that are not derived from NSS signals observed by the NSS receiver. Seeding information is obtained, and a constrained solution, called “seeding- and ambiguity-constrained solution”, is computed by constraining the ambiguities of the precise estimator by the seeding information, by resolving the resulting ambiguities, and by constraining at least one of the other state variables of the precise estimator by the resolved ambiguities. A corresponding system is also disclosed.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: September 21, 2021
    Assignee: Trimble Inc.
    Inventors: Xiaoming Chen, Nico Reussner, Stephan Seeger
  • Patent number: 11092695
    Abstract: A method for improved position estimation. The method includes: receiving first position information from a first GNSS receiver of a vehicle dashboard camera, receiving second position information from a second GNSS receiver of a mobile device carried by a user and proximate the first GNSS receiver, and, when it is determined that the vehicle dashboard camera and the mobile device share the same inertial reference frame and are within the first distance and that the accuracy of either the first position information or the second position information falls beneath the threshold and that the predicted course of either the vehicle dashboard camera and the mobile device is calculated to pass through the region of poor satellite reception, time synchronizing the second position information with the first position information, and combining the first position information with the second position information to determine third position information.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: August 17, 2021
    Assignee: Faraday & Future Inc.
    Inventor: Xiufeng Song
  • Patent number: 11092693
    Abstract: A system and method provide automatic RF path gain calibration independent of RF interference levels to preserve solution trust capabilities. After a system is powered ON, or a new antenna is attached (hot swap), a smart antenna assembly combined with a jammer power estimator within an RF receiver functions to autonomously measure internal gains within the RF path, calibrate the new antenna installation, and thereby measure a level of interference associated with the external environment from that point forward. A controller commands the antenna calibration retrieving antenna details and RF path gain calibration while measuring local jamming at the receiver input. Should the controller determine a level of jamming effectiveness is present, it offers a user a display of the local jamming levels enabling the user accurate theater decision making regarding the accuracy and availability of desirable signal.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: August 17, 2021
    Assignee: Rockwell Collins, Inc.
    Inventors: Karl W. Ulmer, Troy V. Mundt, Gary L. Bachman
  • Patent number: 11086021
    Abstract: A duplicate peak detector acquires and tracks a first correlation peak for a data sequence associated with a navigation satellite in a satellite navigation signal. During tracking of the first correlation peak, a second correlation peak is acquired and tracked for the same data sequence. Respective values of at least one tracking variable of the two correlation peaks are analyzed, and based on the analysis it is determined whether the first and second correlation peaks are associated with the same navigation signal or different navigation signals. If the first correlation peak and the second correlation peak are associated with the same navigation signal, tracking of one of the correlation peaks is discontinued.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: August 10, 2021
    Assignee: Regulus Cyber Ltd.
    Inventors: Avner Zangvil, Gal Cohen, Stanislav Gutliansky, David Ramati, Yoav Zangvil
  • Patent number: 11061103
    Abstract: A system, device and method that enables at least two unsynchronized units with known locations and an unsynchronized unit having an unknown location to communicate with each other and to be a part of enabling navigation by the unit having the unknown location by determining time difference of arrivals of signals between the units.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: July 13, 2021
    Assignee: iSeeLoc, Inc.
    Inventor: Avi Zohar
  • Patent number: 11038268
    Abstract: A signal generator for a phased array antenna comprises a laser light source arranged to provide an optical spectrum comprising a plurality of spaced wavelengths. The signal generator further comprises a dispersion unit arranged to introduce a delay to a plurality of spectral components of the optical spectrum associated with the spaced wavelengths. The delay is dependent on the wavelength of the spectral components of the optical spectrum. The signal generator further comprises a heterodyning device configured to generate a signal for the phased array antenna by heterodyning the spectral components associated with different ones of the spaced wavelengths of the laser light source.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: June 15, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Paolo Ghelfi, Antonella Bogoni, Francesco Laghezza, Sergio Pinna, Filippo Scotti, Giovanni Serafino
  • Patent number: 11029413
    Abstract: A method of determining coordinates, including receiving GNSS (global navigation satellite system) signals from at least five satellites, wherein at least two of the five satellites belong to one constellation, and the remaining satellites belong to at least one other constellation; processing the GNSS signals to measure code and phase measurements for each of the satellites and each of the GNSS signals; selecting a subset of the GNSS signals as an optimal set for coordinate calculation, where the selecting is based on Semi-Definite Programming (SDP) relaxation as applied to an optimization of a PDOP (positional dilution of precision) criterion; calculating coordinates of a receiver based on the code and phase measurements of the selected subset; and outputting the calculated coordinates. The total number of signals in the optimal set should not exceed the predefined number of m signals.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 8, 2021
    Assignee: Topcon Positioning Systems, Inc.
    Inventor: Lev Borisovich Rapoport
  • Patent number: 11022700
    Abstract: The present application provides a method for navigation and positioning of a receiver, including: receiving basic broadcast messages and correction parameters of a plurality of satellites, and establishing a pseudorange observation equation and a carrier-phase observation equation corresponding to each of satellites respectively; correcting the pseudorange observation equation and the carrier-phase observation equation using the received correction parameters to obtain the corrected pseudorange observation equation and the corrected carrier-phase observation equation; constructing a first observation according to the corrected pseudorange observation equation and the corrected carrier-phase observation equation; constructing a second observation according to the corrected pseudorange observation equation and the corrected carrier-phase observation equation; and jointly solving the obtained first observations and second observations of the plurality of satellites to obtain anoperation result of user positioni
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: June 1, 2021
    Assignees: Shanghai Astronomical Observatory, Chinese Academy, ComNav Technology Ltd.
    Inventors: Junping Chen, Jianhua Zhou, Yongquan Wang, He Zhao
  • Patent number: 11009581
    Abstract: Systems, methods, and devices are disclosed herein for Doppler based position estimation. Systems may include an antenna configured to receive a radio frequency (RF) signal from an emitter, and configured to generate an output signal based on the received RF signal. Systems may also include a receiver configured to receive the output signal from the antenna. The receiver may include one or more processors configured to identify a plurality of initial conditions for a plurality of state variables associated with the emitter, obtain a measurement of the RF signal from the emitter and an estimate of an uncertainty associated with the measurement, and generate an output based, at least in part, on an updated estimate of the plurality of state variables, the output identifying a position, velocity, and carrier frequency of the emitter. Systems may also include a communications interface configured to communicatively couple the antenna with the receiver.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: May 18, 2021
    Assignee: The Boeing Company
    Inventors: Sean F. Bentley, Michael J. Greenfield, Randall L. Mosten
  • Patent number: 11009362
    Abstract: Generating trail network maps, including: receiving a plurality of GPS recorded activities; identifying a subset of the plurality of GPS recorded activities that is associated with a trail network region; and generating a trail network map corresponding to the trail network region based at least in part on the subset of the plurality of GPS recorded activities.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 18, 2021
    Assignee: Strava, Inc.
    Inventor: Davis Kitchel
  • Patent number: 10976446
    Abstract: A method for applying GPS UAV attitude estimation to accelerate computer vision. The UAV has a plurality of GPS receivers mounted at fixed locations on the UAV. The method includes receiving GPS signals from each GPS satellite in view of the UAV, the GPS measurements comprising pseudo-range and carrier phase data representing the distance between each GPS receiver and each GPS satellite. Carrier phase and pseudo-range measurements are determined for each GPS receiver based on the pseudo-range and carrier phase data. The GPS carrier phase and pseudo-range measurements are compared pair-wise for each pair of GPS receiver and satellite. An attitude of the UAV is determined based on the relative distance measurements. A 3D camera pose rotation matrix is determined based on the attitude of the UAV. Computer vision image search computations are performed for analyzing the image data received from the UAV in real time using the 3D camera pose rotation matrix.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: April 13, 2021
    Assignee: International Business Machines Corporation
    Inventors: Mahanth K. Gowda, Justin G. Manweiler, Justin D. Weisz
  • Patent number: 10948609
    Abstract: Systems and methods of heading determination with global navigation satellite system (GNSS) signal measurements are provided herein. A pair of antennas may be separated by a known baseline length and mounted on a vehicle. A GNSS receiver may obtain pseudorange and carrier phase measurements for GNSS satellites within view. An LRU may estimate carrier phase ambiguities and a two-dimensional vector, using the known baseline length and a linearized measurement model. The LRU may determine integer ambiguities using the estimated carrier phase ambiguities. The LRU may determine assumed wrong fixes of the integer ambiguities and a probability of almost fixed value. The LRU may store the set of integer ambiguities. The LRU may determine, from accumulated data over measurement epochs, updated integer ambiguities. The LRU may correct the carrier phase measurements using the updated integer ambiguities. The LRU may compute the heading using the corrected carrier phase measurements.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: March 16, 2021
    Assignee: Rockwell Collins, Inc.
    Inventors: Bernard A. Schnaufer, Huan Phan
  • Patent number: 10910709
    Abstract: Systems and methods relate to an electronically scanned antenna array. A beamforming circuit includes a first input, a first output, a second input, a second output and an antenna interface. The antenna interface is coupled to the electronically scanned antenna array. A first control circuit is coupled to the first input and the first output and is configured to provide first beamforming data to the beamforming circuit via the first input. A second control circuit is coupled to the second input and the second output and is configured to provide second beamforming data to the beam forming circuit via the second input.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: February 2, 2021
    Assignee: Rockwell Collins, Inc.
    Inventors: Adrian A. Hill, Thomas B. Campbell
  • Patent number: 10901093
    Abstract: In one implementation, a method includes receiving versions of a message from a first satellite-based receiver and a second satellite-based receiver that both received a radio frequency (“RF”) transmission of the message, the message comprising a self-reported position of a transmitter of the message. The method also includes determining a time difference between a first arrival time of the RF transmission of the message at the first satellite-based receiver and a second arrival time of the RF transmission of the message at the second satellite-based receiver. The method further includes determining a measure of the likelihood that the self-reported position of the transmitter is valid based on the time difference between the first and second arrival times. The method still further includes transmitting an indication of the measure of the likelihood that the self-reported position is valid.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: January 26, 2021
    Assignee: AIREON LLC
    Inventors: Michael A. Garcia, John Dolan
  • Patent number: 10895647
    Abstract: A Global Navigation Satellite System (GNSS) receiver at a client device receives first correction data from a first correction system that includes, but is not limited to, a first orbit correction value, a first clock correction value, and a first code or phase bias correction value. The GNSS receiver also receives second correction data from a second correction system that includes, but is not limited to, a second orbit correction value, a second clock correction value, a second code or phase bias correction value, and an atmospheric correction value. The GNSS receiver determines a difference between a sum of the first correction data and a sum of the second correction data to calculate a difference value that is utilized to adjust the atmospheric correction value received from the second correction system. The adjusted correction value may be utilized with the first correction data to determine position while mitigating errors.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: January 19, 2021
    Assignee: NovAtel Inc.
    Inventor: Altti Samuli Jokinen
  • Patent number: 10866324
    Abstract: A GNSS receiver and the associated method, for calculating an unbiased position and time measurement from a plurality of satellite positioning signals, the receiver comprising: a plurality of circuits configured to receive positioning signals from a plurality of satellites in GNSS constellations, a plurality of first and second signal processing channels configured for processing a first selection of said positioning signals and determining associated first pseudo ranges, a computer logic, wherein: the computer logic is configured to calculate the unbiased position and time measurement from pseudo ranges being determined from positioning signals originating from distinct satellites. A GNSS receiver further comprising a second computer logic configured to calculate a second unbiased position and time from the first position and time, and the second signal processing signals.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: December 15, 2020
    Assignee: CENTRE NATIONAL D'ETUDES SPATIALES
    Inventors: Nabil Jardak, Willy Vigneau, François-Xavier Marmet, Lionel Ries
  • Patent number: 10859711
    Abstract: A railway positioning method, based on the movement of a train determined by a signal receiver of a satellite navigation system embedded onboard the train, and on the movement of the train determined by an odometer embedded onboard the train, and a map of the railway tracks, by determination of the ionospheric propagation bias corresponding to a propagation bias of the signal carrier phase of the satellite navigation system, comprises the steps of, by line of sight of the satellites of the navigation system: estimating the biased ionospheric drift by difference between an integrated Doppler term determined by the receiver and a biased estimation of the movement of the train by the odometer; estimating the odometer drift bias and the drift bias of the local clock of the receiver, by least squares resolution of the speed determined by the satellite navigation system, of the drift bias of the local clock of the receiver, and of the odometer drift bias; correcting the estimation of the ionospheric drift, by subtr
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 8, 2020
    Assignee: THALES
    Inventor: Marc Revol
  • Patent number: 10862207
    Abstract: Devices, methods and systems are disclosed relating to RF signals. A device may comprise a clock input terminal, a variable delay circuit coupled to the clock input terminal and a test terminal as well as a reference signal generator coupled to the variable delay circuit.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 8, 2020
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Samo Vehovc, Ivan Tsvelykh
  • Patent number: 10830862
    Abstract: A position measuring system includes s server and radio wave emitting stations positioned at different locations across a position measuring area. A storage device stores, for each of the plurality of radio wave emitting stations, a beacon identifier that uniquely identifies the radio wave emitting station and a first threshold time. A processor receives, from a portable device, reception information including a reception time indicating when the portable device received a signal from one of the radio wave emitting stations. The processor determines, based on the received signal strength identifier, a position of the reception station in the position measuring area. The processor determines an operation state of the radio wave emitting station corresponding to the received signal. A display device displays information indicating the determined operation state of each of the plurality of radio wave emitting stations.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: November 10, 2020
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Shigeo Uchida, Akihiko Fujiwara, Kenji Ito