Multimode Operation In Different Systems Which Transmit Time-stamped Messages; E.g., Gps/glonass (ipc) Patents (Class 342/357.73)
  • Patent number: 10101461
    Abstract: The present invention relates to a radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal. The radio frequency circuit structure comprises a channel dividing function module, a plurality of frequency converting function modules, a plurality of local oscillator signal modules, and a plurality of analog-to-digital convertor modules. The channel dividing function module is used for dividing a satellite signal of the global navigation satellite system received by an antenna into satellite signals in a plurality of channels. Each of the frequency converting function modules is used for performing frequency conversion on the satellite signals in the corresponding channels to form near zero-frequency signals. Each of the local oscillator signal module is used for generating a local oscillator signal and outputting the local oscillator signal to the frequency converting function module.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: October 16, 2018
    Assignee: COMNAV TECHNOLOGY LTD.
    Inventors: Jie Liu, Yongquan Wang, Yang Song
  • Patent number: 10097219
    Abstract: A waveform generator circuit provides low spurious output signal and includes a primary DDS for generating a RF signal at a first frequency. A DAC receives an output signal from the primary DDS and converts the digital DDS output to an analog output. A spectrum analyzer identifies spurious signals in the DAC output determining the amplitude and frequency characteristics of the spurious signals. The waveform generator includes at least one cancellation DDS configured to generate a pre-distortion signal corresponding to frequencies where spurious signals are expected due to non-linearities in the DAC circuitry. The pre-distortion signals are phase offset from the determined spurious signals to cancel the spurious signals. The pre-distortion signals are combined with the output of the primary DDS. The combined signal contains the primary DDS output signal and pre-distortion signals to produce an analog output signal which cancels out the expected spurious signals.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: October 9, 2018
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Peter L. Delos, Douglas A. Leonard, Jr.
  • Patent number: 9952329
    Abstract: A device comprising a reception unit for automatically receiving two radiofrequency signals originating from different satellite-based positioning and date-stamping systems, a data processing unit for automatically processing each of the radiofrequency signals so as to deduce time data therefrom, each time datum comprising at least one number of weeks, a calculation unit for automatically calculating a UTC date which is compatible with these time data, and a data transmission unit for automatically providing this UTC date to at least one user system.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: April 24, 2018
    Assignee: AIRBUS OPERATIONS SAS
    Inventor: Francois Tranchet
  • Patent number: 9645244
    Abstract: Techniques are provided to quickly estimate a temporal shift of a GPS signal based on an analysis of a GLONASS signal. The shift can be a result of applied leap-second adjustments affecting GLONASS signals but not GPS signals. By identifying this shift, GPS and GLONASS signals can be considered together in order to estimate locations. The temporal shift can be determined, e.g., by estimating a separation between a GPS-signal frame feature (e.g., frame onset) and a GLONASS-signal frame feature (e.g., frame onset), or identifying coinciding frame features (e.g., a GPS-signal subframe coinciding with a GLONASS-signal string number). The techniques allow the temporal shift to be estimated based on an analysis of just a portion of the GPS-signal and GLONASS-signal frames, such that a speed of location estimations can be improved.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: May 9, 2017
    Assignee: QUALCOMM Incorporated
    Inventor: Tong Lin
  • Patent number: 9571978
    Abstract: The systems and methods of the disclosure relate to estimating the location of a remote device, e.g., a mobile phone or other user equipment (“UE”), that is in communication with equipment aboard a high altitude platform (“HAP”). Because the HAP is in motion, the location of the equipment aboard the HAP is not at a fixed location. While this breaks some forms of traditional UE location positioning techniques, it creates new information that can be used instead. Thus, when traditional GPS or ground-station based location services are unavailable, a remote device in communication with equipment aboard a HAP can still be positioned.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: February 14, 2017
    Assignee: Google Inc.
    Inventor: Sharath Ananth
  • Patent number: 9261600
    Abstract: A combined GPS and GLONASS receiver receives GPS signals and GLONASS signals. A calibration signal is generated utilizing the received GPS signals and/or the received GLONASS signals to offset group delay errors in the received GLONASS signals. The generated calibration signal is filtered through Kalman filters to estimate group delay variations in the received GLONASS signals. The estimated group error delay variations are combined with the received GLONASS signals to calibrate the received GLONASS signals by offsetting the estimated group error delay variations. When GPS signals are not available for use, the combined GPS and GLONASS receiver obtains group delay errors stored or in the received GLONASS signals to estimate calibration coefficients. The estimate calibration coefficients are updated utilizing received GPS and/or GLONASS signals.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: February 16, 2016
    Assignee: Broadcom Corporation
    Inventor: Charles Abraham
  • Patent number: 9134398
    Abstract: A wireless location system is disclosed having one or more location centers for locating mobile stations (MS) based on, e.g., WIFI, CDMA, AMPS, NAMPS, TDMA, GPRS, and GSM. MS location requests can be processed via, e.g., Internet communication between a network of location centers. A plurality of MS locating technologies may be used, including those based on: two-way TOA and TDOA; pattern recognition; distributed antennas; and reduced coverage base stations. The system includes strategies for: automatically adapting and calibrating system performance according to environmental and geographical changes; automatically capturing location signal data for enhancing a historical data base retaining predictive location signal data; evaluating MS locations according to heuristics and constraints related to, e.g., terrain, MS velocity and path; and adjusting likely MS locations adaptively and statistically.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: September 15, 2015
    Assignee: TracBeam LLC
    Inventors: Dennis J. Dupray, Charles L. Karr, Sheldon F. Goldberg
  • Patent number: 9097794
    Abstract: An ultrasound Doppler detection method with Golay-encoded excitation is used to obtain the flow information of a moving object. A first Golay code is transmitted to the moving object for a reflection signal of the first Golay code and a second Golay code is transmitted to the moving object for a reflection signal of the second Golay code after waiting for a pulse repetition interval. The received reflection signals are match-filtered to generate a first and a second wave. The above steps are repeated several times. Then, a slow-time filter in the Doppler frequency domain whose low-pass cut-off frequency is a quarter of the pulse repetition frequency is used to filter out the first sidelobes of the first waves and the second sidelobes of the second waves. Finally, the ultrasound Doppler detection is formed according to the first mainlobes of the first waves and the second mainlobes of the second waves.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: August 4, 2015
    Assignee: National Taiwan University
    Inventor: Che-Chou Shen
  • 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: 8990009
    Abstract: Methods, systems, and portable devices which reduce the power used by a portable device to receive/process satellite navigational system signals and/or to compute the portable device's position using satellite navigational system signals are provided. A method includes retrieving information concerning power usage characteristics based on aggregate data corresponding to a current location of the portable device; and selecting a power saving mode based on the retrieved power usage information from the aggregate data, where each of the plurality of power saving modes reduces power usage in at least one of receiving the satellite navigational system signals, processing the satellite navigational system signals, and computing the portable device's position using the satellite navigational system signals.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: March 24, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Gary Lennen, Andy Milota
  • Publication number: 20150054686
    Abstract: Systems, methods, and apparatuses are provided for compensating for ionospheric delay in multi constellation Global Navigation Satellite Systems (GNSSs). In one method, a single Radio Frequency (RF) path receiver receives a first signal at a first frequency from a first satellite in a first GNSS constellation, receives a second signal at a second frequency from a second satellite in a second GNSS constellation, and calculates the ionospheric delay using the received first signal and the received second signal.
    Type: Application
    Filed: March 17, 2014
    Publication date: February 26, 2015
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Phanikrishna SAGIRAJU, William NOLTE
  • Patent number: 8948238
    Abstract: Apparatus, the apparatus having at least one processor and at least one memory having computer-readable code stored thereon which when executed controls the at least one processor to perform a method comprising: obtaining in-phase and quadrature samples of a received radio signal at least first and second discrete instances in time; processing the samples to provide information relating to the amplitude and/or phase of the received radio signal at the first and second instances in time; using the amplitude and/or phase information of the received radio signal at the first and second instances in time to determine whether interference is present on the received radio signal; forwarding the complex signal parameters for processing if interference is determined not to be present; and discarding the complex signal parameters without forwarding them for processing if interference is determined to be present.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 3, 2015
    Assignee: Nokia Corporation
    Inventors: Ville Valtteri Ranki, Antti Paavo TapaniKainulainen, Fabio Belloni
  • Publication number: 20140368379
    Abstract: A method, receiver, and mobile terminal for simultaneously receiving and processing signals of multiple satellites from a plurality of navigational satellite system constellations are described. In the method, satellite signals from a plurality of navigational satellite systems are translated into an intermediate frequency and converted from analog to digital together, but then are separated out according to each navigational satellite system in the digital domain.
    Type: Application
    Filed: August 28, 2013
    Publication date: December 18, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Gary LENNEN
  • 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: 8878723
    Abstract: For supporting a satellite based positioning of a mobile arrangement (30, 40) with assistance data, a communication network converts parameters of a dedicated orbit model describing a movement of a satellite (50, 60), which dedicated orbit model is defined for a particular satellite based positioning system, into parameters of a common orbit model describing a movement of a satellite (50, 60). Alternatively or in addition, the network replaces a reference value that is based on a satellite based positioning system time in available parameters of an orbit model by a reference value that is based on a communication system time. After the parameter conversion and/or the reference value replacement, the parameters are provided as a part of assistance data for the satellite based positioning.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: November 4, 2014
    Assignee: Nokia Corporation
    Inventor: Jari Syrjarinne
  • Patent number: 8866671
    Abstract: Methods and apparatuses are provided that may be implemented in various electronic devices to possibly reduce a first-time-to-fix and/or otherwise increase the performance or efficiency of a device by using portions of system time identifiers from different systems to determine at least one navigation system time.
    Type: Grant
    Filed: November 4, 2009
    Date of Patent: October 21, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: William James Morrison
  • Patent number: 8860610
    Abstract: Methods and apparatuses are disclosed for enabling a satellite-based navigation signal receiver to support multiple types of global navigation satellite systems (GNSS). A legacy GNSS receiver can support a plurality of GNSS types by software upgrade and with a new/modified radio frequency (RF) chip. There is no need to completely redesign a navigation host chip to support the multiple GNSS types. This invention offers a cost-efficient multi-GNSS solution without sacrificing the navigation performance. A GNSS baseband controller controls synchronization of measurement time for digitized data along a first signal processing path for a legacy GNSS signal and a second signal processing path for a non-legacy GNSS signal.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: October 14, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventors: Daming Hang, Zongde Qiu, Rui Tang, Daniel Babitch
  • Publication number: 20140266886
    Abstract: A global navigation satellite system (GNSS) receiver includes at least one GNSS antenna configured to receive input signaling from at least a first GNSS source and a second GNSS source; an in-phase/quadrature (I/Q) mixer coupled to the at least one GNSS antenna and configured to process the input signaling to obtain complex intermediate signaling; a first complex filter coupled to the I/Q mixer and configured to filter the complex intermediate signaling with respect to a first frequency range to obtain first real output signaling; a second complex filter coupled to the I/Q mixer and configured to filter the complex intermediate signaling with respect to a second frequency range to obtain second real output signaling; and a signal combiner coupled to the first and second complex filters and configured to generate combined real output signaling by combining the first real output signaling and the second real output signaling.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: Cheng-Han Wang, Hong Sun Kim, Liang Zhao, Jin-Su Ko
  • Patent number: 8803734
    Abstract: Methods and devices may request and provide assistance data from an assistance server to a receiver in a global navigation satellite system. A request for assistance data may include a preference list of navigation models suitable for the requesting receiver. Multiple preference lists for different navigation model types (e.g., orbit model, clock model, almanac model) may be included in a single list and/or data structure, or as multiple lists and/or data structures. An assistance server may receive and process the preference list, for example, by parsing and traversing the ordered list(s) for different navigation model types, in order to provide satellite navigation data to the receiver in accordance with suitable navigation models that are available at both the receiver and the assistance server.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: August 12, 2014
    Assignee: Nokia Corporation
    Inventors: Lauri Aarne Johannes Wirola, Ismo Kullervo Halivaara, Tommi Antero Laine
  • 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: 8760345
    Abstract: A satellite signal receiver 40 comprises a measurement component 43 adapted to perform measurements on received satellite signals. In order to enable an enhanced handling of the measurements, the receiver further comprises a first processing unit 44 adapted to run a software 45 for controlling the measurement component 43 based on received control parameters. In addition, it comprises a first interface component 46 adapted to receive control parameters via another interface component 34 from another processing unit 35, adapted to provide the control parameters to the first processing unit 44 and adapted to forward measurement results from the measurement component 43 via the other interface component 34 to the other processing unit 35.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: June 24, 2014
    Assignee: Nokia Corporation
    Inventors: Jari Syrjärinne, Harri Valio, Kimmo Alanen, Samuli Pietilä, Tuomo Honkanen
  • Publication number: 20140091967
    Abstract: Described herein are various embodiments of methods and corresponding hardware and software that are configured to permit a seismic data acquisition module to switch between GNSS systems according to which system at a given time is determined to provide the best signal characteristics for acquiring accurate positional and timing data regarding the precise geographic location of the seismic data acquisition module when it is deployed in the field, and the corresponding times at which seismic data are acquired and recorded thereby.
    Type: Application
    Filed: March 14, 2013
    Publication date: April 3, 2014
    Applicant: Global Geophysical Services, Inc.
    Inventors: Ralph Buckley Muse, JR., Graham Michael Scott, Caroline M. Branch
  • Patent number: 8681045
    Abstract: A hybrid satellite positioning receiver architecture is provided with a first receive path and a second receive path. The first receive path downconverts received satellite positioning signals of a first type to an intermediate frequency range, and the second receive path downconverts received satellite positioning signals of a second type to the same intermediate frequency range.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: March 25, 2014
    Assignee: Intel Mobile Communications GmbH
    Inventors: Markus Hammes, Christian Kranz, Andre′ Neubauer
  • Publication number: 20140062783
    Abstract: A method and a receiver for receiving positioning signals are disclosed. The positioning signals are received from a plurality of first sources in a first frequency range and from a plurality of second sources in a second frequency range different from the first frequency range. The receiver is switched between the first and second frequency ranges to receive the positioning signals, and the receiver obtains time offset information about a time taken to switch the receiver between the first and second frequency ranges, by obtaining a solution to a set of simultaneous equations based on combined navigation data for the first and second sources.
    Type: Application
    Filed: February 7, 2013
    Publication date: March 6, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Samsung Electronics Co., Ltd.
  • Publication number: 20140062782
    Abstract: A combined GPS and GLONASS receiver receives GPS signals and GLONASS signals. A calibration signal is generated utilizing the received GPS signals and/or the received GLONASS signals to offset group delay errors in the received GLONASS signals. The generated calibration signal is filtered through Kalman filters to estimate group delay variations in the received GLONASS signals. The estimated group error delay variations are combined with the received GLONASS signals to calibrate the received GLONASS signals by offsetting the estimated group error delay variations. When GPS signals are not available for use, the combined GPS and GLONASS receiver obtains group delay errors stored or in the received GLONASS signals to estimate calibration coefficients. The estimate calibration coefficients are updated utilizing received GPS and/or GLONASS signals.
    Type: Application
    Filed: February 4, 2013
    Publication date: March 6, 2014
    Applicant: Broadcom Corporation
    Inventor: Broadcom Corporation
  • Publication number: 20140028498
    Abstract: Techniques are provided to quickly estimate a temporal shift of a GPS signal based on an analysis of a GLONASS signal. The shift can be a result of applied leap-second adjustments affecting GLONASS signals but not GPS signals. By identifying this shift, GPS and GLONASS signals can be considered together in order to estimate locations. The temporal shift can be determined, e.g., by estimating a separation between a GPS-signal frame feature (e.g., frame onset) and a GLONASS-signal frame feature (e.g., frame onset), or identifying coinciding frame features (e.g., a GPS-signal subframe coinciding with a GLONASS-signal string number). The techniques allow the temporal shift to be estimated based on an analysis of just a portion of the GPS-signal and GLONASS-signal frames, such that a speed of location estimations can be improved.
    Type: Application
    Filed: July 24, 2012
    Publication date: January 30, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventor: Tong Lin
  • Publication number: 20140028499
    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: Application
    Filed: January 11, 2013
    Publication date: January 30, 2014
    Applicant: QUALCOMM Incorporated
    Inventor: Qualcomm Incorporated
  • Patent number: 8630805
    Abstract: A method of mapping a space using a combination of radar scanning and optical imaging. The method includes steps of providing a measurement vehicle having a radar system and an image acquisition system attached thereto; aligning a field of view of the radar system with a field of view of the image acquisition system; obtaining at least one radar scan of a space using the radar scanning system; obtaining at least one image of the space using the image acquisition system; and combining the at least one radar scan with the at least one image to construct a map of the space.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: January 14, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Jan Becker, Oliver Schwindt
  • Patent number: 8624778
    Abstract: A set of parameters for a plurality of satellites belonging to at least two different satellite systems is assembled. Further, a definition of a data structure is provided, the data structure including at least one section for parameters for a plurality of satellites belonging to at least two different satellite systems.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: January 7, 2014
    Assignee: Nokia Corporation
    Inventors: Jari Tapani Syrjarinne, Lauri Aarne Johannes Wirola
  • Patent number: 8614642
    Abstract: Methods and apparatus are provided for processing a set of GNSS signal data derived from signals of a first set of satellites having at least three carriers and signals of a second set of satellites having two carriers. A geometry filter uses a geometry filter combination to obtain an array of geometry-filter ambiguity estimates for the geometry filter combination and associated statistical information. Ionosphere filters use a two-frequency ionospheric combination to obtain an array of ionosphere-filter ambiguity estimates for the two-frequency ionospheric combinations and associated statistical information. Each two-frequency ionospheric combination comprises a geometry-free two-frequency ionospheric residual carrier-phase combination of observations of a first frequency and observations of a second frequency.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: December 24, 2013
    Assignee: Trimble Navigation Limited
    Inventors: Nicholas Charles Talbot, Ulrich Vollath
  • Publication number: 20130328719
    Abstract: Spoofing of a satellite positioning system is detected by receiving position location data from multiple sources. The received data is compared and inconsistent data is marked. A position location is estimated based on the received position location data, while accounting for the marked inconsistent data.
    Type: Application
    Filed: August 13, 2013
    Publication date: December 12, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Arnold Jason Gum, Douglas Neal Rowitch
  • Patent number: 8604974
    Abstract: An electronic circuit separates frequency-overlapped GLONASS and GPS overlapped in an approximately 4 MHz passband. The circuit uses a multiple-path analog-to-digital converter circuit (ADC). A sampling rate circuit is coupled to concurrently operate the analog-to-digital converter circuit at a sampling rate between about 60 Msps and about 80 Msps. A digital processing circuit includes storage defining complex de-rotation and low pass filtering. The digital processing circuit is fed by the analog-to-digital converter circuit and is operable A) to establish an access rate and respective distinct phase increments for the complex de-rotation, B) to execute the complex de-rotation by combinations of trigonometric multiplications using the distinct phase increments approximately concurrently and C) to execute the low pass filtering on the complex de-rotation resulting at the access rate and respective distinct phase increments, thus delivering GPS and Glonass signals separated from each other.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: December 10, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Publication number: 20130307724
    Abstract: Disclosed therein is an apparatus for generating a GPS (Global Positioning System) time that includes: a storing portion for storing a first GPS time corresponding to a 1PPS (Pulse Per Second) signal generated from a GPS receiver for synchronization with an INS (Inertial Navigation System); and a GPS time calculating portion for, upon reception of the 1PPS signal from the GPS receiver, adding a previous first GPS time stored in the storing portion and a period of the 1PPS signal to compute a second GPS time, and storing the first GPS time corresponding to the received 1PPS signal in the storing portion, thereby generating an accurate GPS time at a generation point of the 1PPS signal.
    Type: Application
    Filed: January 11, 2012
    Publication date: November 21, 2013
    Inventors: Cheonjoong Kim, Heongwon Park, Hyunseok Kim
  • Patent number: 8582693
    Abstract: Wireless receiver for receiving a plurality of co-existing wireless signals respectively from different positioning systems, includes an analog frontend and an analog-to-digital converting unit. The analog frontend is arranged to convert bands of the co-existing wireless signals into a plurality of corresponding intermediate bands by a local frequency and to provide an intermediate signal including the intermediate bands. The analog-to-digital converting unit is coupled to the analog frontend, and is arranged to convert the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: November 12, 2013
    Assignee: Mediatek Singapore PTE. Ltd.
    Inventors: Chun-Geik Tan, Wei-Min Shu, Chi-Hsueh Wang
  • Patent number: 8531332
    Abstract: Spoofing of a satellite positioning system is detected by receiving position location data from multiple sources. The received data is compared and inconsistent data is marked. A position location is estimated based on the received position location data, while accounting for the marked inconsistent data.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: September 10, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Arnold J. Gum, Douglas Neal Rowitch
  • Publication number: 20130229306
    Abstract: A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
    Type: Application
    Filed: March 26, 2013
    Publication date: September 5, 2013
    Applicant: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Publication number: 20130141277
    Abstract: Methods and apparatuses are disclosed for enabling a satellite-based navigation signal receiver to support multiple types of global navigation satellite systems (GNSS). A legacy GNSS receiver can support a plurality of GNSS types by software upgrade and with a new/modified radio frequency (RF) chip. There is no need to completely redesign a navigation host chip to support the multiple GNSS types. This invention offers a cost-efficient multi-GNSS solution without sacrificing the navigation performance. A GNSS baseband controller controls synchronization of measurement time for digitized data along a first signal processing path for a legacy GNSS signal and a second signal processing path for a non-legacy GNSS signal.
    Type: Application
    Filed: December 6, 2011
    Publication date: June 6, 2013
    Inventors: Daming Hang, Zongde Qiu, Rui Tang, Daniel Babitch
  • Publication number: 20130106655
    Abstract: This document describes a method of processing data which consists in detecting and storing in a device the stream of navigation messages and the physical parameters of the signals received in a receiver originating from the satellite-based or terrestrial navigation systems and its comparison with the original data transmitted by the navigation system with respect to a time reference common for all the signals. The stream recorded generates a signature which is unique for each instant and each position over the whole service area (Earth or other planet or celestial body). The result of the processing of the data for a particular point of the Earth serves to validate and authenticate the position and the time reference that are delivered by the navigation receiver as well as the quality and authenticity of the signal received.
    Type: Application
    Filed: June 30, 2011
    Publication date: May 2, 2013
    Inventor: Antonio Pujante Cuadrupani
  • Patent number: 8427366
    Abstract: A wireless receiver for multiple frequency bands reception includes a single receive radio frequency (RF) circuit (160, 170) having an RF bandpass substantially confined to encompass at least two non-overlapped such frequency bands at RF, a single in-phase and quadrature (approximately I, Q) pair of intermediate frequency (IF) sections (120I, 120Q) having an IF passband, and a mixer circuit (110) including an in-phase and quadrature (I,Q) pair of mixers (110I, 110Q) fed by said RF circuit (160, 170) and having a local oscillator (100) with in-phase and quadrature outputs coupled to said mixers (110I, 110Q) respectively, said mixer circuit (110) operable to inject and substantially overlap the at least two non-overlapped frequency bands with each other into the IQ IF sections (120I, 120Q) in the IF passband, the IF passband substantially confined to a bandwidth encompassing the thereby-overlapped frequency bands.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: April 23, 2013
    Assignee: Texas Instruments Incorporated
    Inventors: Saravana Kumar Ganeshan, Bijoy Bhukania, Anand Kannan
  • Patent number: 8410979
    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: April 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Qinfang Sun, Justin Huang, Wen-Chang Yeh
  • Patent number: 8405546
    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: March 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Wen-Chang Yeh, Hao Zhou, Qinfang Sun
  • Patent number: 8400354
    Abstract: A combined GPS and GLONASS receiver receives GPS signals and GLONASS signals. A calibration signal is generated utilizing the received GPS signals and/or the received GLONASS signals to offset group delay errors in the received GLONASS signals. The generated calibration signal is filtered through Kalman filters to estimate group delay variations in the received GLONASS signals. The estimated group error delay variations are combined with the received GLONASS signals to calibrate the received GLONASS signals by offsetting the estimated group error delay variations. When GPS signals are not available for use, the combined GPS and GLONASS receiver obtains group delay errors stored or in the received GLONASS signals to estimate calibration coefficients. The estimate calibration coefficients are updated utilizing received GPS and/or GLONASS signals.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: March 19, 2013
    Assignee: Broadcom Corporation
    Inventor: Charles Abraham
  • Patent number: 8391340
    Abstract: A low-cost GPS/GNSS receiver receives a satellite signal at an RF frequency (fRF). The GPS/GNSS receiver includes a front end section for receiving the satellite signal and generating a digital complex signal having a first bandwidth, the received satellite signal being converted into a complex signal before digitizing, a signal capturing section for searching for and acquiring the satellite signal, the signal capturing section including a capture memory, a baseband processor for tracking the acquired satellite signal, and a signal splitter coupled to the front end section. The signal splitter splits the digital complex signal into two bandwidths, by generating a narrowband digital complex signal having a second bandwidth substantially smaller than the first bandwidth. The signal splitter provides the narrowband digital signal to the capture memory and the wider first bandwidth digital complex signal to the baseband processor.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: March 5, 2013
    Assignee: Magellan Systems Japan, Inc.
    Inventor: Lawrence R. Weill
  • Publication number: 20130033398
    Abstract: Method, arrangement and system for improving a combined use of a plurality of different satellite navigation systems, in which each of the plurality of different satellite navigation systems includes a constellation of at least one satellite. The method includes broadcasting from each satellite of the constellation of a first satellite navigation system the clock models for all satellites of the constellation of a second satellite navigation system.
    Type: Application
    Filed: June 15, 2012
    Publication date: February 7, 2013
    Applicant: ASTRIUM GMBH
    Inventor: Hans L. TRAUTENBERG
  • Patent number: 8358243
    Abstract: Methods and apparatuses are provided for use by devices within a wireless communication network to request and/or provide sensitivity assistance information signals associated with one or more Satellite Positioning Systems (SPSs).
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: January 22, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Ie-Hong Lin, Douglas Neal Rowitch, Sven Fischer
  • Patent number: 8334807
    Abstract: Each of a first and a second navigation satellite system (NSS) are adapted to operate according to a first and a second specification, respectively, and each includes a first and a second plurality of satellite vehicles (SV), respectively. Each of the first and the second plurality of SVs are adapted to be identified by a first and a second plurality of unique corresponding identifications (IDs), respectively. A processor is adapted to receive and identify a first plurality of corresponding signals transmitted from the first plurality of SVs in response to the first plurality of unique corresponding IDs. The processor is adapted to receive and identify a second plurality of corresponding signals transmitted from the second plurality of SVs in response to the second plurality of unique corresponding IDs. The processor is adapted to determine position location information in response to receiving and identifying the first plurality of corresponding signals and the second plurality of corresponding signals.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: December 18, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Peter Gaal, Sven Fischer, Stephen W. Edge
  • Patent number: 8305268
    Abstract: A system and method capable of mitigating the migration from the current GPS system to the Galileo system and allow a single satellite system positioning receiver to process both GPS signals and Galileo signals.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: November 6, 2012
    Assignee: CSR Technology Inc.
    Inventor: Gary Lennen
  • Publication number: 20120268320
    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.
    Type: Application
    Filed: July 2, 2012
    Publication date: October 25, 2012
    Applicant: Global Locate, Inc.
    Inventor: Frank van DIGGELEN
  • Patent number: 8248301
    Abstract: The present invention is related to location positioning systems, and more particularly, to a method and apparatus for using satellite state information from two or more different satellite systems in navigation processing. According to one aspect, it makes use of GPS extended ephemeris functionality to produce satellite state vector estimates for GLONASS satellites. These satellite state vector estimates can be used alone or in combination with GPS satellite vectors to provide updates to the receiver's navigation processing. According to further aspects, the GLONASS satellite position and trajectory information is extrapolated with a GPS gravity model rather than the GLONASS model, thereby allowing it to be extrapolated more accurately and for longer periods of time than the GLONASS model allows.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: August 21, 2012
    Assignee: CSR Technology Holdings Inc.
    Inventors: Mangesh Chansarkar, Keith Brodie, Makarand Phatak, William Kerry Keal