Testing, Monitoring, Correcting Or Calibrating Of A Receiver Element (ipc) Patents (Class 342/357.62)
  • Patent number: 10389008
    Abstract: Technique for improving efficiency of on-chip antennas, comprising placing each antenna on an individual area on the chip, defined by channels provided in the chip before or after placing the antenna(s). The channels may be metallized. Frequency of a radiating antenna element may be locked by wireless injection locking using a locked subharmonic frequency.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: August 20, 2019
    Assignee: RAMOT AT TEL-AVIV UNIVERSITY LTD.
    Inventors: Eran Socher, Eliezer Halpern, Samuel Jameson
  • Patent number: 10386495
    Abstract: Methods, systems, and apparatus for detecting poor Doppler measurements results in GNSS navigation, in one aspect, a method including: calculating a first Doppler shift value, wherein the first Doppler shift value is based on movement of a Global Navigation Satellite System (GNSS) receiver and calculated according to a Doppler measurement result; calculating a second Doppler shift value, wherein the second Doppler shift value is based on movement of the GNSS receiver and calculated according to a projection of velocity of the GNSS receiver on a line of sight (LOS) vector; comparing the first Doppler shift value with the second Doppler shift value to check an accuracy of the Doppler measurement result; and determining at least a direction of movement of the GNSS receiver in accordance with the checked accuracy of the Doppler measurement result.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: August 20, 2019
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Qiufang Zhu, Jiangping Deng, Zhike Jia
  • Patent number: 10330772
    Abstract: Described herein are techniques for determining a location of a device. In an example, a group of access points may be selected. Time-of-flight (ToF) measurements relative to the device may be received from each of the access points in the group. A respective distance of the device from each access point may be determined using the ToF measurements and a baseToF value. Location coordinates of the device and a new baseToF value may be determined based on the determined distances and the location coordinates of each access point in the group.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 25, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Souvik Sen, Dongho Kim
  • Patent number: 10281584
    Abstract: A received Direct Sequence Spread Spectrum DSSS signal is processed by performing DSSS acquisition to obtain estimates of a frequency offset and a spreading code phase, sequentially obtaining, for each one of a plurality of segments of a received DSSS signal, a correlation function between the DSSS signal segment and a replica of a spreading code by using a Time and Frequency Transform based correlation method, the estimated frequency and the spreading code phase, and performing DSSS carrier tracking by tracking the phase of a correlation peak in the obtained correlation functions, and applying phase corrections to the obtained correlation functions to provide fine Doppler compensation. The time and frequency transform based correlation method involves, for each segment of the received DSSS signal, obtaining a plurality of samples and transforming the samples from the time domain to the frequency domain.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: May 7, 2019
    Assignee: AIRBUS DEFENCE AND SPACE LIMITED
    Inventors: Michael Turner, Kwok Mak
  • Patent number: 10281613
    Abstract: A wireless seismic data acquisition unit with a wireless receiver providing access to a common remote time reference shared by wireless seismic data acquisition units in a seismic system. The receiver can replicate local version of remote time epoch to which a seismic sensor analog-to-digital converter is synchronized. The receiver can replicate local version of remote common time reference to time stamp local node events. The receiver can be placed in a low power, non-operational state over periods of time during which the unit continues to record seismic data, thus conserving unit battery power. The system corrects the local time clock based on intermittent access to the common remote time reference. The system corrects the local time clock via a voltage controlled oscillator to account for environmentally induced timing errors. The system provides a more stable method of correcting drift in the local time clock.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: May 7, 2019
    Assignee: MAGSEIS FF LLC
    Inventors: Clifford H. Ray, Glenn D. Fisseler, William Guyton
  • Patent number: 10237101
    Abstract: A receiving device according to the present invention includes: a search range control unit that determines, for a reception signal including a plurality of wireless signals partially overlapping on at least one of a time axis and a frequency axis and received by a moving object, a search range for the plurality of wireless signals in a search space including the time axis and the frequency axis based on information on position and velocity of the moving object; a time frequency detection unit that generates information on time and frequency at which a wireless frame included in each of the plurality of wireless signals is received in the search range for the reception signal determined by the search range control unit; and a detection unit that demodulates the reception signal to acquire the wireless frame based on the information on time and frequency generated by the time frequency detection unit.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: March 19, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Yasunori Noda
  • Patent number: 10212540
    Abstract: Accurate position capability can be quickly provided using a Wireless Local Area Network (WLAN). When associated with a WLAN, a wireless device can quickly determine its relative and/or coordinate position based on information provided by an access point in the WLAN. Before a wireless device disassociates with the access point, the WLAN can periodically provide time, location, and decoded GPS data to the wireless device. In this manner, the wireless device can significantly reduce the time to acquire the necessary GPS satellite data (i.e. on the order if seconds instead of minutes) to determine its coordinate position.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: February 19, 2019
    Assignee: QUALCOMM Incorporated
    Inventor: Yi-Hsiu Wang
  • Patent number: 10200814
    Abstract: Methods and apparatuses for providing a k-nearest neighbor for location based services are provided. A method can include querying a database to detect a plurality of interest points within a predetermined distance of the user device using a kNN algorithm, organizing the interest points within a Voronoi tree, and continuously return a position specific result of relevant interest points.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: February 5, 2019
    Assignee: The Florida International University Board of Trustees
    Inventors: Mingjin Zhang, Naphtali Rishe, Weitong Liu, Jahkell Lazarre
  • Patent number: 10171184
    Abstract: An automatic system level testing (ASLT) system for testing smart devices is disclosed. The system comprises a system controller coupled to a smart device in an enclosure, wherein the system controller comprises a memory comprising test logic and a processor. The enclosure comprises a plurality of components, wherein the processor is configured to automatically control the smart device and the plurality of components in accordance with the test logic. The plurality of components comprises: (a) a robotic arm comprising a stylus affixed thereto; and (b) a platform comprising a device holder affixed thereto, wherein the smart device is inserted into the device holder; and (c) a wireless access point. The processor is further configured to: (a) control the smart device to activate wireless mode; (b) receive wireless signals from the wireless access point using the smart device; (c) retrieve wireless scan results from the smart device; and (d) analyze the wireless scan results.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 1, 2019
    Assignee: W2BI, INC.
    Inventors: Derek Diperna, Ira Leventhal, Keith Schaub, Artun Kutchuk
  • Patent number: 10159041
    Abstract: A communication apparatus includes a memory that stores instructions, and a processor that executes the instructions. The instructions are executed to transmit to another communication apparatus a notification for requesting a predetermined type of packet which is used by the communication apparatus for changing an operation mode of the communication apparatus from a first operation mode to a second operation mode higher than the first operation mode in power consumption, and to determine, in a case where the predetermined type of packet is received from the another communication apparatus during a test time period according to the notification, the first operation mode as an operation mode of the communication apparatus after the test time period. The operation mode of the communication apparatus is set to the first operation mode according to such a determination.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: December 18, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoya Sakai, Kazuya Taniguchi, Kensuke Yasuma
  • Patent number: 10159055
    Abstract: A system and method for time-aiding an autonomous Global Positioning System device over a Bluetooth connection allows for a faster time to fix by allowing faster acquisition of time and ephemeris data. The time-aiding information may be distributed in a one-to-one manner or in a manner that allows for the synchronization of multiple devices.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: December 18, 2018
    Assignee: Google Technology Holdings LLC
    Inventors: Timothy M. McCune, Michael E. Russell
  • Patent number: 9983314
    Abstract: The invention proposes a system for excluding a failure of a satellite suitable for a hybrid navigation system and which operates even in case of degraded geometry of the constellation of satellites. The hybrid system according to the invention comprises a plurality M of hybridization filters (SFH1, . . . SFHM) each receiving at least one satellite positioning measurement (MPS) carried out on the signals received from all the satellites in visibility of the said system and an inertial positioning measurement (MPI) and delivering a corrected positioning measurement, the so-called hybrid measurement (MHS1, . . . MHSM), the hybridization filters being updated, at a constant temporal rate, successively at periodically shifted temporal instants.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 29, 2018
    Assignee: Thales
    Inventor: Nicolas Vercier
  • Patent number: 9860294
    Abstract: Technology for receiving streaming media content is disclosed. A media presentation description (MPD) for the streaming media content can be received at a user equipment (UE). A streaming interval can be selected for the streaming media content. A power consumption level can be calculated for receiving the streaming media content at each of a plurality of media content representations that are described in the MPD. A media content representation can be selected from the plurality of media content representations based on: the power consumption level associated with receiving the streamed media content at the media content representation; and power status information for the UE, using the one or more processors of the UE. The streaming media content can be received at the selected media content representation, at the UE, in accordance with the streaming interval. The streaming media content can be played at the UE.
    Type: Grant
    Filed: December 24, 2014
    Date of Patent: January 2, 2018
    Assignee: Intel Corporation
    Inventors: Mohamed M. Rehan, Hassnaa Moustafa, Yomna Hassan, Mohamed Badawi, Yiting Liao, Jeffrey R. Foerster
  • Patent number: 9843350
    Abstract: A receiver and a receiving method of the receiver such that monolithic integration of multiple receiving channels can be implemented. The receiver includes a zero intermediate frequency channel, performing in-phase/quadrature (IQ) down conversion on a radio frequency signal at a first frequency band using a frequency division or frequency multiplication signal of a first oscillation signal, and a superheterodyne channel, performing down conversion on a radio frequency signal at a second frequency band using the frequency division or frequency multiplication signal of the first oscillation signal, where the first frequency band is different from the second frequency band. The zero intermediate frequency channel and the superheterodyne channel use a same oscillation signal or a same frequency division or frequency multiplication signal of the oscillation signal, thereby monolithic integration of multiple receiving channels can be implemented.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: December 12, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhuobiao He, Jianfeng Wu, Zhengxiang Ma
  • Patent number: 9794335
    Abstract: A method may comprise communicating by a first computer with a second computer over a network during a first frame having a first frame duration; transmitting a first synchronization signal from the first computer to the second computer; receiving by the first computer during the first frame a second synchronization signal from the second computer; determining by the first computer a first elapsed time between a time when the first synchronization signal was transmitted by the first computer and a time when the second synchronization signal was received by the first computer; and determining by the first computer a duration for a second frame based at least in part on the first elapsed time.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: October 17, 2017
    Assignee: The Boeing Company
    Inventor: Dennis Walter Gvillo
  • Patent number: 9712229
    Abstract: A system and method for time-aiding an autonomous Global Positioning System device over a Bluetooth connection allows for a faster time to fix by allowing faster acquisition of time and ephemeris data. The time-aiding information may be distributed in a one-to-one manner or in a manner that allows for the synchronization of multiple devices.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: July 18, 2017
    Assignee: GOOGLE TECHNOLOGY HOLDINGS LLC
    Inventors: Timothy M. McCune, Michael E. Russell
  • Patent number: 9651675
    Abstract: A GNSS enabled device that is communicatively coupled to a network, receives time stamps via the network. The time stamps are generated based on reference clock signals within the network. GNSS receiver clock signal frequency may be adjusted based on the time stamps. When GNSS satellite signals and/or SRN signals are not available, the time stamps enable synchronization with GNSS satellites. Network clock signals and/or time stamps may be generated by an access point, a DSL modem, a cable modem and/or a primary reference clock within the network. A series of time stamps may be utilized for adjusting frequencies. Clock signals may be generated for adjusting frequencies based on a comparison between time stamps and oscillator or mixer output. Clock signals are generated for baseband, intermediate and/or RF frequency signal processing. GNSS satellite signals may be demodulated, correlated with a pseudonoise code sequence and/or synchronized based on the time stamps.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: May 16, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Jeyhan Karaoguz, Charles Abraham, Mark Buer, David Garrett, David Albert Lundgren, David Murray
  • Patent number: 9612338
    Abstract: A method of acquiring a satellite signal in a GNSS receiver includes multiplying a received signal with a hypothesized doppler frequency signal to generate a frequency shifted signal. A PN code sequence signal is multiplied with the frequency shifted signal to generate a PN wiped signal. A windowing function signal is multiplied with the PN wiped signal to generate a windowed signal. The windowed signal is integrated coherently for a first predefined time to generate a coherent accumulated data.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 4, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthik Subburaj, Karthik Ramasubramanian, Jawaharlal Tangudu
  • Patent number: 9573651
    Abstract: In a method for detecting a maintenance situation on a two-wheeled vehicle having a motor provided in order to assist forward motion of the two-wheeled vehicle at least at times, a maintenance situation is detected by sensing the position of the two-wheeled vehicle by way of a first sensor variable. Control is then applied to the motor either as a reduction in the applied drive power output, e.g. in the form of the motor speed or torque, or as a complete shutoff or immobilization of the motor.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: February 21, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Daniel Baumgaertner, Jakob Kleinbach
  • Patent number: 9426769
    Abstract: An approach is provided to process communication information for determining a possible correction-offset to location information of a user. A location verification platform may process and/or facilitate a processing of communication information associated with at least one user device. The location verification platform may also determine a current geo-location of the at least one user device based, at least in part, on the communication information. Further, the location verification platform may determine an accuracy of the current geo-location based, at least in part, on a comparison of the current geo-location with contextual location information associated with the current geo-location. Furthermore, the location verification platform may determine a correction-offset to the current geo-location based, at least in part, on an accuracy threshold.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: August 23, 2016
    Assignee: HERE GLOBAL B.V.
    Inventor: Antonio Haro
  • Patent number: 9357344
    Abstract: Disclosed are a time calibration method and device. The method includes: a mobile terminal determines the local time where the mobile terminal is located according to the time data in a received GPS navigation message and time zone information about the mobile terminal (S102); and the mobile terminal performing time calibration on itself according to the local time where it is located (S104). The embodiments of the present disclosure can solve the problem that a mobile terminal cannot precisely adjust the time automatically if there is no accurate reference time or if there is no network coverage.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: May 31, 2016
    Assignee: ZTE CORPORATION
    Inventor: Pucha Chen
  • Patent number: 9322922
    Abstract: Apparatus for calculating the position of a receiver in dependence on the time it takes signalling events to travel from a plurality of satellites to the receiver, obtains an indication of a transit time for a signalling event to travel from each satellite to the receiver, and forms an indication of an expected transit time for a signalling event to travel from the satellite to the receiver. The obtained indication of the transit time and the indication of the expected transit time for each non-reference satellite are compared with the obtained indication of the transit time and the indication of the expected transit time for the reference satellite to form residuals that are representative of a combined error in those indications of expected transit time; and the position of the receiver is calculate without calculating the integer ambiguities in the obtained transit times, in dependence on the residuals.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: April 26, 2016
    Assignee: QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.
    Inventors: Anthony Richard Pratt, Murray Robert Jarvis
  • Patent number: 9151845
    Abstract: The present system relates to a GNSS receiver that includes a processor. The processor is configured to receive a temperature signal from a temperature sensor indicating an operating temperature of an resonator. The processor is also configured to compute a frequency and a frequency correction data of the resonator based on the temperature and a frequency model of the resonator. The processor then transmits the frequency correction data to an RF receiver which utilizes the frequency correction data and the resonator to receive and RF signal.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: October 6, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Daniel Babitch, Steven A. Gronemeyer
  • Patent number: 9103912
    Abstract: Dynamic inter-channel bias calibration of a navigational receiver is provided. A reference signal is propagated through front-end circuitry of the receiver. A delay caused by the propagation of the reference signal through the front-end circuitry is measured. The inter-channel bias of the navigational receiver is reduced using the measured delay associated with the front-end circuitry of the receiver.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: August 11, 2015
    Assignee: Javad GNSS, Inc.
    Inventors: Sergey Yudanov, Vyacheslav Varyukhin, Nikolay Shurygin, Javad Ashjaee
  • Publication number: 20150097726
    Abstract: Methods, systems, and devices for monitoring a Real Time Clock (RTC) oscillator using Digital Signal Processing (DSP), where a resistance/capacitance (RC) oscillator is configured to output a digital pulse signal and a digital RTC Monitor Integrated Circuit (IC) is configured to monitor the RTC oscillator timing signal using the RC oscillator signal. In one aspect, the RTC Monitor IC includes an RTC input configured to receive the RTC oscillator timing signal; an RC input configured to receive the RC oscillator digital pulse signal; and an RTC reset output configured to output an RTC reset signal when a comparison of the RTC and RC oscillator inputs show the RTC oscillator has missed one or more clock cycles. A single wire input/output for both reset and interrupt signals between circuits is also described.
    Type: Application
    Filed: July 10, 2014
    Publication date: April 9, 2015
    Inventors: Daniel Babitch, Steven A. GRONEMEYER, Nicolas VANTALON
  • Patent number: 8996311
    Abstract: A navigation system for use with moving vehicles includes target points proximate to a rendezvous site located on a first moving vehicle. One or more transmitters associated with the target points broadcast time-tagged target point positioning information. A navigation unit on a second moving vehicle utilizes a camera with known properties to capture images that include the target points. The navigation unit processes the image that corresponds in time to the positioning information, to determine the relative position and orientation of the rendezvous site at the second vehicle. The navigation unit utilizes the relative position and orientation and an absolute position and orientation of the rendezvous site calculated from the target position information and calculates an absolute position and orientation corresponding to the second vehicle.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: March 31, 2015
    Assignee: NovAtel Inc.
    Inventors: Kristian Morin, Michael Bobye, Sandy Kennedy
  • Patent number: 8976065
    Abstract: An apparatus and a method, the apparatus comprising: a temperature compensated oscillator; satellite positioning circuitry; and a temperature sensor configured to provide a first control output to the temperature compensated oscillator and to provide a second control output to the satellite positioning circuitry.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: March 10, 2015
    Assignee: Nokia Corporation
    Inventor: Philip Geoffrey Eade
  • Patent number: 8970431
    Abstract: The present invention is related to location positioning systems, and more particularly, to a method and apparatus of synchronizing to data bits in a positioning system signal. According to a first aspect, the present invention speeds up data bit sync by allowing high Pfa in the overall bit sync computation (e.g. 10?2) for coarse aided case. According to another aspect, the present invention combines and aligns signals from satellites for use in the bit sync computation (e.g. for improved sensitivity and speed).
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: March 3, 2015
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Gary Lennen
  • Publication number: 20150035698
    Abstract: A satellite positioning subsystem includes a frequency converter that applies a downshift in frequency to a received signal that should contain a satellite signal that has been spread and modulated on a carrier signal. A non-crystal oscillator produces an output signal whose frequency acts as a controlling reference for the frequency converter. A crystal oscillator is coupled to a controller that develops a control signal for controlling the frequency of the output signal of the non-crystal oscillator. A processor intermittently corrects the crystal oscillator such that its output frequency experiences jumps. A filter filters the control signal to limit the rate of change of frequency that the control signal demands of the output signal of the non-crystal oscillator such that a phase rotation of ? cannot occur in the output signal of the non-crystal oscillator in the time that would be taken to despread a sample of the satellite signal.
    Type: Application
    Filed: October 20, 2014
    Publication date: February 5, 2015
    Inventors: James Digby Yarlett Collier, Tim Newton, Per-Ludvig Normark, Thomas Renstrom
  • Patent number: 8912956
    Abstract: A mobile communication device includes a global navigation satellite system (GNSS) receiver for receiving GNSS signals, a radio frequency (RF) receiver for receiving RF signals and a voltage controlled oscillator supplying an oscillator signal to the GNSS receiver and the RF receiver. The GNSS receiver and the RF receiver use the oscillator signal to receive the GNSS signals and the RF signals. The mobile communication device also includes a processor for initializing and/or adjusting a model of a frequency behavior of the voltage controlled oscillator, and uses the model to track the GNSS signals when computing a location of the mobile communication device.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: December 16, 2014
    Assignee: CSR Technology Inc.
    Inventor: Daniel Babitch
  • Patent number: 8912955
    Abstract: Systems and methods for extracting synchronization information from ambient signals, such as broadcast television signals, and using the synchronization information as a reference for correcting the local time base so that a GNSS positioning receiver system maintains relative time base accuracy with respect to a GNSS time.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: December 16, 2014
    Assignee: MaxLinear, Inc.
    Inventors: Curtis Ling, Anand Anandakumar
  • Patent number: 8902104
    Abstract: Method and apparatus for processing satellite signals from a first satellite navigation system and a second satellite navigation system is described. In one example, at least one first pseudorange between a satellite signal receiver and at least one satellite of the first satellite navigation system is measured. At least one second pseudorange between the satellite signal receiver and at least one satellite of the second satellite navigation system is measured. A difference between a first time reference frame of the first satellite navigation system and a second time reference frame of the second satellite navigation system, is obtained. The at least one first pseudorange and the at least one second pseudorange are combined using the difference in time references.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: December 2, 2014
    Assignee: Global Locate, Inc.
    Inventor: Frank van Diggelen
  • Patent number: 8884818
    Abstract: A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: November 11, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Qinfang Sun, Hao Zhou
  • Patent number: 8884816
    Abstract: A temperature compensating device for providing active bias for an amplifier includes a voltage source, a plurality of loads, and a current generator for generating a current for the amplifier according to voltages provided by the voltage source and the plurality of loads, wherein a first load of the plurality of loads is a thermistor utilized for keeping the current within a specified range under a plurality of ambient temperatures.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: November 11, 2014
    Assignee: Wistron NeWeb Corporation
    Inventors: Chen-Chia Huang, Chun-Ching Wang, Cho-Hsuan Wu
  • Patent number: 8854260
    Abstract: The problem of simulating movement of multiple GNSS or regional navigational satellite system satellites across the sky within a test environment is solved by the technology disclosed using a test chamber with a plurality of zones bounded by azimuth and elevation limits, positioning at least one directional antenna in each zone, driving each antenna individually with a GNSS simulator capable of producing multiple positioning signals for a plurality of satellite sources in a single zone, and coordinating among GNSS simulators a simulated orbital movement of the satellite sources from one zone to an adjoining zone to produce changing angles of arrival for the positioning signals during a test. Both methods and systems implement this technology.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: October 7, 2014
    Assignee: Spirent Communications, Inc.
    Inventor: Peter Boulton
  • Patent number: 8847819
    Abstract: Navigation system receiver, and test circuits and methods for determining drift profile of a receiver clock in the navigation system receiver are disclosed. In an embodiment, the navigation system receiver includes a clock source configured to generate a receiver clock for the navigation system receiver and a test circuit. The test circuit is configured to facilitate determination of a drift profile associated with the receiver clock based on detection and tracking of a test signal received by the test circuit, where the test signal comprises at least one continuous wave (CW) signal.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 30, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Karthik Ramasubramanian, Jawaharlal Tangudu
  • Patent number: 8816903
    Abstract: A method and apparatus for faster global positioning system (GPS) location using pre-computed spatial location data are described. In one embodiment, a method includes acquiring a pre-computed spatial location of a mobile platform device (MPD) that is computed when a GPS receiver is disabled due to the spatial location of the MPD. In one embodiment, the pre-computed spatial location is determined by a non-GPS based spatial location technology when a receiver is disabled due to the spatial location of the MPD. During the periodic computation of spatial location data, the GPS receiver may be monitored. In one embodiment, in response to activation of the GPS receiver, the pre-computed spatial location data is provided to the GPS receiver for identification and lock onto a predetermined number of visible satellites to reduce a time to first fix (TTFF) a current spatial location of the MPD. Other embodiments are described and claimed.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: August 26, 2014
    Assignee: Intel Corporation
    Inventors: Uttam Sengupta, Sanjay Bakshi, Shriharsha Hedge
  • Publication number: 20140232596
    Abstract: An apparatus for performing calibration of an antenna array having a plurality of antennas including at least a first antenna and a second antenna. The apparatus includes a global navigation satellite system receiver configured to measure a first phase of a first signal received by the first antenna from a satellite and a second phase of a second signal received by the second antenna from the satellite. The apparatus also includes at least one processor configured to receive the first phase and the second phase from the global navigation satellite system receiver and to operate in a calibration mode to determine a difference between the first and second phases.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 21, 2014
    Applicant: Lockheed Martin Corporation
    Inventors: Charles Apker, Mark Bullock, Steven Pratt, David D. Schmidt, Matthew Stafford, Scott O. Sorber
  • Publication number: 20140225774
    Abstract: The problem of simulating movement of multiple GNSS or regional navigational satellite system satellites across the sky within a test environment is solved by the technology disclosed using a test chamber with a plurality of zones bounded by azimuth and elevation limits, positioning at least one directional antenna in each zone, driving each antenna individually with a GNSS simulator capable of producing multiple positioning signals for a plurality of satellite sources in a single zone, and coordinating among GNSS simulators a simulated orbital movement of the satellite sources from one zone to an adjoining zone to produce changing angles of arrival for the positioning signals during a test. Both methods and systems implement this technology.
    Type: Application
    Filed: May 20, 2013
    Publication date: August 14, 2014
    Applicant: SPIRENT COMMUNICATIONS, INC.
    Inventor: Peter Boulton
  • Publication number: 20140225773
    Abstract: The problem of simulating movement of multiple GNSS or regional navigational satellite system satellites across the sky within a test environment is solved by the technology disclosed using a test chamber with a plurality of zones bounded by azimuth and elevation limits, positioning at least one directional antenna in each zone, driving each antenna individually with a GNSS simulator capable of producing multiple positioning signals for a plurality of satellite sources in a single zone, and coordinating among GNSS simulators a simulated orbital movement of the satellite sources from one zone to an adjoining zone to produce changing angles of arrival for the positioning signals during a test. Both methods and systems implement this technology.
    Type: Application
    Filed: February 13, 2013
    Publication date: August 14, 2014
    Applicant: SPIRENT COMMUNICATIONS, INC.
    Inventor: Peter George Boulton
  • Patent number: 8803736
    Abstract: A primary phase measurement device measures a first carrier phase and a second carrier phase of carrier signals received by the location-determining receiver. A secondary phase measurement device measures the third carrier phase and the fourth carrier phase of other carrier signals. A real time kinematic engine estimates a first integer ambiguity set associated with the measured first carrier phase and a second integer ambiguity set associated with the measured second carrier phase. The real time kinematic engine estimates a third ambiguity set associated with the measured third carrier phase and a fourth ambiguity set associated with the measured fourth carrier phase. A compensator is capable of compensating for the inter-channel bias in at least one of the third ambiguity set and the fourth ambiguity set by modeling a predictive filter in accordance with various inputs or states of the filter estimated by an estimator.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: August 12, 2014
    Assignee: Navcom Technology, Inc.
    Inventors: Liwen Dai, Chaochao Wang
  • Patent number: 8712360
    Abstract: A system includes a first clock module, a global positioning system (GPS) module, a phase-locked loop (PLL) module, a cellular transceiver, and a baseband module. The first clock module generates a first clock reference. The GPS module operates in response to the first clock reference. The WLAN module operates in response to the first clock reference. The PLL module generates a second clock reference by performing automatic frequency correction (AFC) on the first clock reference in response to an AFC signal. The cellular transceiver receives radio frequency signals from a wireless medium and generates baseband signals in response to the received radio frequency signals. The baseband module receives the baseband signals, operates in response to a selected one of the first clock reference and the second clock reference, and generates the AFC signal in response to the baseband signals.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: April 29, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Gregory Uehara, Alexander Zaslavsky, Brian T. Brunn
  • Patent number: 8688297
    Abstract: Methods and systems for continually measuring the length of a train operating in a positive train control environment are provided. Particularly, the methods and systems provided herein equate repetitive line of sight ranging measurements from the head end to the rear end of a train with the physically draped length of the train along a mapped track with various horizontal and vertical curvature characteristics.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: April 1, 2014
    Assignee: Lockheed Martin Corporation
    Inventor: Charles W. Morris
  • Patent number: 8681043
    Abstract: A global navigation satellite system (GNSS) enabled mobile device comprising a crystal oscillator and an automatic frequency correction (AFC) circuit may be operable to share the crystal oscillator between processing of cellular radio signals and processing of GNSS data messages. The GNSS enabled mobile device may be operable to enforce an AFC correction when the crystal oscillator drifts beyond a specific frequency error. The AFC correction may be allowed during time intervals corresponding to GNSS words at which decoding of these words is not required. The GNSS enabled mobile device may be operable to disable the AFC correction during time intervals associated with decoding of words while the crystal oscillator may drift within the specific frequency error range. After the decoding of one or more of words is completed, the AFC correction may be allowed during the time intervals corresponding to these words.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: March 25, 2014
    Assignee: Broadcom Corporation
    Inventors: Charles Abraham, John Walley
  • Publication number: 20140070990
    Abstract: A communications device includes a housing, an antenna carried by the housing, an oscillator carried by the housing to generate a reference signal, and an RF receiver carried by the housing, and coupled to the antenna and the oscillator, the RF receiver demodulating a received signal from the antenna based upon the reference signal. The communications device also includes a GPS receiver carried by the housing to generate a calibration signal, a temperature sensor carried by the housing to generate a sensed temperature value, and a processor carried by the housing and coupled to the oscillator, the RF receiver, the GPS receiver, and the temperature sensor. The processor may enter an oscillator calibration mode based upon the sensed temperature value for selectively calibrating the oscillator based upon the calibration signal.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 13, 2014
    Applicant: HARRIS CORPORATION
    Inventors: Brent JOSEFIAK, Brian PADALINO
  • Patent number: 8665148
    Abstract: An electronic device such as a cellular telephone may include transceiver circuitry for handling wireless communications. The transceiver circuitry may include a transceiver such as a cellular telephone transceiver or a wireless local area network receiver and may include a satellite positioning system receiver. Radio-frequency circuitry may be used to couple the transceiver circuitry to antenna structures. When operating the transceiver in different modes of operation, the radio-frequency circuitry may be adjusted to optimize performance. Adjustments to the radio-frequency circuitry may impose phase offsets on satellite positioning system signals that are received through the antenna structures and radio-frequency circuitry. These phase offsets which would otherwise cause degradation in the satellite positioning system receiver can be compensated by applying stored compensating phase offset values to the satellite positioning system receiver during operation.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: March 4, 2014
    Assignee: Apple Inc.
    Inventors: Joseph Hakim, Matt A. Mow
  • Patent number: 8660586
    Abstract: A method in a mobile terminal for estimating a position of the mobile terminal includes: receiving an expected measurement map indicative of an expected measurement of a parameter by the mobile terminal; receiving parameters of a matrix corresponding to the expected measurement map; capturing, by the mobile terminal, actual measurements of the parameter for a plurality of communication devices; and utilizing the received parameters and actual measurements to estimate the position of the mobile terminal, where each of the actual measurements and the expected measurement map comprise values indicative of a delay in a communication path between the mobile terminal and one or more of the plurality of communication devices.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 25, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Ravi Palanki, Ayman Fawzy Naguib
  • Patent number: 8643542
    Abstract: A method for self-calibration of frequency offsets in a measurement equipment of an interference monitoring system is provided. The method involves sampling I/Q data using the interference monitoring system measurement equipment and acquiring satellite navigation signals from the I/Q data. A carrier frequency of the satellite navigation signal is estimated and an expected carrier frequency of the satellite navigation signal is calculated. The expected carrier frequency of the satellite navigation signal is compared with the estimated carrier frequency of the satellite navigation signal and a frequency offset value is calculated as the difference between the expected and estimated carrier frequencies of the satellite navigation signal. The frequency offset value is stored in a memory and used to compensate the frequency offset of at least one subsequent measurement.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: February 4, 2014
    Assignee: Astrium GmbH
    Inventor: Jan Wendel
  • Patent number: 8593342
    Abstract: The present invention provides methods of performing GNSS receivers' satellite signal acquisition and TTFF while taking advantage of SBAS signals. Due to a SBAS satellite's geostationary position and typically strong signal, the SBAS satellite signal can be acquired more quickly than a GPS satellite signal. Once a SBAS satellite signal is acquired the Doppler frequency search uncertainty may be reduced for remaining GNSS satellites which are to be acquired. Furthermore, a satellite search list may be optimized to search for satellites close to the line of sight (LOS) of the SBAS satellite for which a signal has been acquired, in receiver “warm” and “hot” start modes. Moreover, since a SBAS signal sub-frame is only one second long, which is shorter than six seconds for a GPS signal sub-frame, synchronization of the SBAS signal sub-frame may be achieved faster than for GPS signals. With aided time information, a receiver may compute the absolute time of week (TOW) from a sub-frame synchronized SBAS signal.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: November 26, 2013
    Assignee: CSR Technology Holdings Inc.
    Inventors: Mangesh Chansarkar, Gang Xie, Gengsheng Zhang
  • Patent number: 8593343
    Abstract: Embodiments of the invention provide a method of adjusting a bandwidth of receivers. A plurality of outputs from a correlator engine are combined. User dynamics are sensed. Bandwidth of one or more receivers are adjusted. By detecting when the user is stationary, the Doppler frequency estimation can be corrected or the SNR can be boosted more both of which lead to improved performance. The embodiments allow a receiver to process signals in when the signal level would otherwise be too low—for example indoors. The embodiments can improve performance when one or more satellites are temporarily blocked but one or more satellites are still being tracked.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: November 26, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Deric W. Waters, June Chul Roh, Sandeep Rao