Patents Examined by Dao L. Phan
  • Patent number: 10295674
    Abstract: Disclosed is a system for determining a protection level. The system includes a receiver configured to receive an error augmentation for a satellite orbit and clock error, an error augmentation for an ionospheric error, an error augmentation for noise and multi-path between a receiver and a satellite, and an error augmentation for a tropospheric error, a first calculator configured to calculate a first adjustment coefficient to be applied to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error, and a second calculator configured to calculate a protection level by applying the first adjustment coefficient.
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: May 21, 2019
    Assignee: Korea Aerospace Research Institute
    Inventors: Young Sun Yun, Eun Sung Lee, Moon Beom Heo, Gi Wook Nam
  • Patent number: 10295676
    Abstract: The present disclosure relates to a receiving device and a receiving method that can receive both signals of a GNSS signal and a wireless LAN at lower cost and more compactly. A selecting unit selects either a received GNSS signal or wireless LAN signal. By multiplying the signal selected in the selecting unit by a local oscillation signal generated in a local oscillation circuit, a converting unit converts the selected signal into an IF signal with lower intermediate frequency. A control unit controls the selecting unit, and performs control so that the GNSS signal and the wireless LAN signal are processed in a time-sharing manner in the converting unit. The technology of the present disclosure can be applied to a receiving device that receives a signal from a GPS satellite, for example.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: May 21, 2019
    Inventor: Katsuyuki Tanaka
  • Patent number: 10297915
    Abstract: Signals are received from antenna elements in an antenna array, and respective phase shifts are applied to the received signals. The respective phase shifts are relative to a channel phase shift associated with each antenna element, and correspond to side angles from a current antenna beam direction of the antenna array. Control signals based on the phase shifted signals are generated to control the channel phase shifts, to provide beamforming tracking.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: May 21, 2019
    Inventors: Ming Jian, Taiwen Tang, Wenyao Zhai
  • Patent number: 10290939
    Abstract: Systems and methods are provided for regulating heat for a Phased Array Antenna (PAA). The system includes a PAA, which includes array elements to handle Radio Frequency (RF) signals. The PAA also includes a circuit. The circuit includes an amplifier that operates on a current to amplify signals for the PAA, and a sensor that measures temperature at the MMIC. The PAA also includes an array controller that adjusts the current for the amplifier based on a temperature measured by the sensor.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 14, 2019
    Inventors: Rodney K. Bonebright, Mark William Steeds, Gary Wilsey, Jacob C. Killens
  • Patent number: 10288716
    Abstract: The concepts, systems and method described herein provide direction finding (DF) methods based on a minimum distance (MINDIST) search to principal components. In an embodiment, the method includes capturing samples of data from one or more array elements. The samples may be samples of a signal received at the array elements. The method includes generating a spatial sample covariance matrix (SCM) using the samples of data, extracting principal components from the SCM and generating a principal component table using angle and frequency measurement for each of the principal components. The method further includes determining a distance between a test point and each value in the principal component table and identifying a minimum distance point corresponding to a direction of the received signal. The minimum distance point may correspond to direction of arrival of a signal on the one or more array elements.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 14, 2019
    Assignee: Raytheon Company
    Inventor: James M. Bowden
  • Patent number: 10288746
    Abstract: Disclosed are an error estimation method capable of reducing a processing load, and estimating errors of indexes indicating a state of a moving object with high accuracy by using a signal from a positioning satellite.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: May 14, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Yimei Ding, Daisuke Sugiya
  • Patent number: 10288715
    Abstract: In an array antenna having a plurality of subarrays, a direction finding system and technique includes receiving signals at an array antenna and capturing data with a plurality of groups of subarrays. Each group of subarrays may capture data during a selected one of a plurality of different dwell times. The method further includes generating a plurality of dwell spatial sample covariance matrices (SCMs) using data corresponding to one or more of the plurality of groups of subarrays and combining the plurality of dwell spatial SCMs in complex form to generate an aggregate covariance matrix (ACM). The ACM may then be used in subsequent processing with MINDIST technique to estimate a direction of a received signal based on the combined data.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 14, 2019
    Assignee: Raytheon Company
    Inventor: James M. Bowden
  • Patent number: 10281590
    Abstract: Location of a device within a monitored environment with compromised communication with ranging communication nodes. Specifically, an intermediate device previously located by communication with ranging communication nodes is provided to provide a ranging signal to a device to be located. The device to be located may in turn use a ranging signal received from communication with the previously located device and one or more ranging communication nodes to resolve a location.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: May 7, 2019
    Assignee: iPosi, Inc.
    Inventors: Richard M. Lee, Christopher Neil Kurby, Eric Derbez
  • Patent number: 10281585
    Abstract: A Geostationary Earth Orbit (GEO) satellite belonging to a constellation of satellites of a BeiDou navigation system is acquired at a GNSS receiver. Conducting the acquisition includes finding the edge of a data bit in a signal carrying a data stream of a given satellite in order to start a locked tracking phase and demodulating the data stream of the GEO satellite. Detecting the edge of the data bit includes performing, at the GNSS receiver, a coherent power accumulation over a constant data cycle, starting from two respective possible initial positions in the sequence of data. Detecting the edge of the data bit also includes computing a tracking ratio parameter as the ratio of the two coherent power accumulations multiplied by a constant value.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: May 7, 2019
    Inventor: Domenico Digrazia
  • Patent number: 10274604
    Abstract: Aspects of the disclosure include a method of prioritizing generation of predicted ephemeris data. The method includes receiving, by a device through a data network, first ephemeris seed data of a subset of a plurality of satellites, identifying a first satellite and a second satellite of the plurality of satellites, the first satellite being potentially detectable by the device at an estimated position at a given time, and the second satellite being potentially undetectable by the device at the estimated position at the given time, and prioritizing generation of first predicted ephemeris data that represent a first orbit of the first satellite before generation of second predicted ephemeris data that represent a second orbit of the second satellite. The generation of the first predicted ephemeris is based on the first ephemeris seed data.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 30, 2019
    Inventors: BoChih Liu, Zhike Jia, Jinfeng Liu, Zhicui Lu, Juhong Xing
  • Patent number: 10270507
    Abstract: A system substantially updates all the phase shifter values of a phased array antenna by using two “global writes” to update these parameters to all phased-array transformation circuits simultaneously via a serial bus. Antenna elements, each controlled by a phased-array transformation circuit, are individually configured to transform phase and gain according to a register array. The register array has a local register group and a central register group, the local registers physically placed close in proximity to RF chains which each correspond to an element of array antenna, whereby each set of local registers control an individual antenna element and a central register controlling overall beam steering function. Gain values are hierarchically distributed. The apparatus is configured to efficiently elaborate phase shift weights into a submodule of a phase array antenna system with low noise and bandwidth.
    Type: Grant
    Filed: July 23, 2016
    Date of Patent: April 23, 2019
    Inventors: James Wang, Chak Chie
  • Patent number: 10256528
    Abstract: A portable device for wireless communication is disclosed. The portable device comprises an antenna array having N array elements distributed on and conforming to the surfaces of the portable device, N being an integer greater than 1. The N array elements output N signals to a frontend unit. The frontend unit receives the N signals and generates N digital signals. A digital beam forming network, coupled to the frontend unit, processes M digital signals selected from the N digital signals, M being an integer less than or equal to N, and generates K beams based on the M digital signals, K being an integer greater than 1. A controlling unit, coupled to the digital beam forming network, computes dynamically a beam weight vector for each of the K beams based on data on orientation and position of the portable device and data on geometry of the antenna array and hub directions. A position information unit, coupled to the controlling unit, generates the data on position and orientation of the portable device.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: April 9, 2019
    Inventor: Donald C. D. Chang
  • Patent number: 10241187
    Abstract: A sensor includes a reception antenna, a parasitic antenna terminating in a variable load, a controller, a transmitter transmitting a transmission signal, a receiver, a memory, and a processor. The controller sets an impedance value of the variable load. The receiver receives a first signal formed of signals received by the antennas and derived from the transmission signal, and the signal received by the parasitic antenna corresponding to the impedance value. The memory stores a first signal strength value of the first signal corresponding to the impedance value. The processor sets candidates of a complex propagation channel, calculates second signal strength values of a second signal respectively corresponding to the candidates, estimates a target complex propagation channel by selecting a candidate corresponding to a minimum difference among differences between the first signal strength value and the second signal strength values, and estimates a direction of arrival of the first signal.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: March 26, 2019
    Inventors: Naoki Honma, Takeshi Nakayama, Takashi Morimoto
  • Patent number: 10234537
    Abstract: A beacon includes a housing, multiple directional radio frequency antennas, a multiplexer, and a signal source that produces a signal output. The directional radio frequency antennas are attached to the housing such that each directional radio frequency antenna points out radially from an axis of the housing in a direction different than the other directional radio frequency antennas. The multiplexer is electrically connected to each of the directional radio frequency antennas and to the signal source. The multiplexer is configured to sequentially conduct the radio signal output from the signal source to each of the directional radio frequency antennas to produce a wireless signal, wherein the signal output is only conducted to one of the directional radio frequency antennas at any given time and includes a unique identifier identifying the antenna it is currently being transmitted from. The beacon may also include electrical hardware for performing time of flight measurements.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: March 19, 2019
    Assignee: Otter Products, LLC
    Inventor: Christopher R. Langlois
  • Patent number: 10224629
    Abstract: In one aspect, the inventive concepts disclosed herein are directed to an antenna array system employing a current sheet array (CSA) wavelength scaled aperture. The CSA wavelength scaled aperture can include a first frequency region associated with a first operating frequency band and a second frequency region associated with a second operating frequency band. The first operating frequency band can include one or more current sheet sub-arrays having a respective plurality of first unit cells scaled to support the first operating frequency band. The second operating frequency band can include one or more current sheet sub-arrays having a respective plurality of second unit cells scaled to support the second operating frequency band. The CSA wavelength scaled aperture can include one or more capacitors each of which coupled to a respective first unit cell of the first frequency region and a respective second unit cell of the second frequency region.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: March 5, 2019
    Inventor: James B. West
  • Patent number: 10222448
    Abstract: Improvements in fingerprint based localization methods of mobile devices using precomputed reference maps with time series of fingerprints taken along some physical path, involving dynamic benchmarking of arbitrary paths within the map, generation of fingerprint points, location estimates, and creation of heat maps.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: March 5, 2019
    Assignee: GmbH
    Inventors: Thomas Burgess, Markus Krainz
  • Patent number: 10218068
    Abstract: Various embodiments presented herein relate to determining mutual coupling between a pair of antennas in an array antenna. Various operations presented herein enable comparison between a magnitude and phase of a signal transmitted from a first feed network (via a first antenna) and a magnitude and phase of a portion of the signal received at a second feed network (via a second antenna). Electrical effects engendered by any of the first feed network, a first switch, a first local circuit, the second feed network, a second switch, and a second local circuit can also be determined and their effects mathematically removed. Based upon the foregoing, a mutual coupling between the pair of antenna is determined.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: February 26, 2019
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Hung Loui, Thomas Edward Christian, Jr.
  • Patent number: 10211527
    Abstract: A method and apparatus for calibrating a phased antenna array. The antennas are excited using several excitation patterns, each changing the state of the antennas by a specific amplitude and phase. The phases correspond to phase values of a basis function of a two-dimensional discrete Fourier transform, and each excitation pattern corresponds to a different basis function. Using a calibration antenna, e.g. at a fixed point inside the system, the phase and amplitude of the radiated field due to each excitation patterns is measured sequentially. From this data, the phase and amplitude of the radiated field for each element at the location of the calibration antenna is obtained and used to adjust the phase shifters and amplifiers. For calibrated systems, the spectral domain representation of radiated fields can be sparse. Taking advantage of this property and a spectrally compressed sensing technique, recalibration can involve fewer measurements to mitigate service interruptions.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: February 19, 2019
    Assignee: C-COM Satellite Systems Inc.
    Inventors: Safieddin Safavi-Naeini, Mohammad Haghtalab
  • Patent number: 10203418
    Abstract: Method for estimating the position of a portable device which includes: a first estimation step (11), in which is estimated the position and the extension of a first spatial region (100) where the portable device is located and; a second estimation step (12), in which is estimated the position of the portable device by the selection of the position where the portable device is located among the positions included in the first spatial region (100).
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: February 12, 2019
    Assignee: GIPSTECH S.R.L.
    Inventor: Gaetano D'Aquila
  • Patent number: 10199725
    Abstract: Systems and related methods for reducing passive intermodulation (PIM) include a combination of an antenna control unit (ACU) and a remote electrical tilt (RET) system. The ACU may be used to generate rotational motion of an output drive shaft in response to an input tilt control signal. The RET system couples to the output drive shaft of the ACU and may be used to convert the rotational motion into translational motion for modifying a phase shift of an antenna beam. PIM may be substantially eliminated by providing electrical isolation between the ACU and RET system in the form of a non-conductive connector that engages the draft shaft of the ACU.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: February 5, 2019
    Inventors: Asaad R. Elsaadani, Timothy Bernhardt, Peter A. Casey, Chenguang Zhou, Peng Cui, Gaetan G. F. Fauquert, Eric Callec