Acquisition Or Tracking Of Signals Transmitted By The System (ipc) Patents (Class 342/357.63)
  • Patent number: 10816674
    Abstract: GNSS receiver duty cycling is based on context awareness. Context awareness can be received signal quality, targeted navigation performance, and external information extracted from other sensors or being received from other sources such as cellular system, Wi-Fi, camera, LiDAR, and Bluetooth Low Energy (BLE).
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: October 27, 2020
    Assignee: Sony Corporation
    Inventor: Mohamed Youssef
  • Patent number: 10810521
    Abstract: An information system for an industrial vehicle comprises an electronic component on the industrial vehicle that is programmably configured to obtain data by communicating across a vehicle network bus of the industrial vehicle with at least one other component of the industrial vehicle. The information system also comprises memory that stores industrial vehicle information according to a mapping specified by a data object model. Moreover, a processor on the industrial vehicle is programmed to repeatedly perform a cyclically recurring operation that extracts at least a portion of the industrial vehicle information stored in the memory device as broadcast information, generates at least one broadcast message representing the extracted broadcast information, and transmits the generated at least one broadcast message on the vehicle network bus. Accordingly, the entire contents of the broadcast information are repeatedly transmitted across the vehicle network bus in a cyclically recurring manner.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: October 20, 2020
    Assignee: Crown Equipment Corporation
    Inventors: Timothy A. Wellman, Dean E. Winner
  • Patent number: 10739731
    Abstract: An electronic timepiece, including: a counter; a display section; a first processor; a second processor; and a power supply section which supplies electric power to each section from a battery, wherein when an output voltage from the power supply section decreases to less than a predetermined first reference voltage, the first processor stops a display operation by the display section, when the time information is acquired by the processing operation of the second processor, the first processor corrects the time counted by the counter based on the acquired time information and causes the display section to display the corrected time, and when the output voltage decreases to less than the first reference voltage following an acquisition operation of the time information by the second processor, the first processor does not stop a time display operation during a predetermined pending period.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: August 11, 2020
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Kosuke Hasegawa, Yohei Kawaguchi, Katsuhiko Obata, Mitsuaki Matsuo, Shimpei Matsuda
  • Patent number: 10728032
    Abstract: A system and methods for location authentication are presented. An estimated server signal is estimated based on a generated known code signal, and a client received satellite signal is received from a client device. The client received satellite signal is compared to the estimated server signal to provide a comparison result.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: July 28, 2020
    Assignee: The Boeing Company
    Inventors: Per K. Enge, David Lawrence, Michael L. O'Connor, Michael L. Eglington, Gregory M. Gutt, David A. Whelan
  • Patent number: 10594406
    Abstract: Pilot-aided digital coherent reception of high-order QAM signal detection using a continuous short pilot preamble and subsequent pilot symbols that are periodically distributed with payload data resulting in low-complexity and fast-convergence signal detection for continuous mode coherent reception of high-order QAM signals. A digital signal processor is configured to demodulate a transmitted data stream from digital stream of measurements of light mixtures produced in a receiver for coherent optical communications in response to receiving modulated optical carriers. The digital signal processor includes one circuit stage for providing corrections to the digital stream to compensate first effects on the light mixtures due to a frequency shift of a local optical oscillator of the receiver and another circuit stage for correcting the digital stream to compensate for second effects on the light mixtures due to polarization dependent channel modification of the modulated optical carriers.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: March 17, 2020
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Chen Zhu, Noriaki Kaneda
  • Patent number: 10560133
    Abstract: To provide a device for radio communication using a plurality of antennas, in which: an amplitude/phase adjuster (1) and an amplitude/phase controller (1) control the amplitude and the phase of signals input from at least two antennas such that a directivity, allowing a desired signal to be obtained; an amplitude/phase adjuster (2) and an amplitude/phase controller (2) control the amplitude and the phase of the signals input from the antennas such that an arrival direction of the desired signal becomes a null point and that a directivity, allowing a signal other than the desired signal to be obtained; a signal synthesizer (1) combines the signals; a signal synthesizer (2) combines the signals; and a desired signal generator removes a signal from the signal synthesizer (2) from a signal from the signal synthesizer (1).
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: February 11, 2020
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Koji Yotsumoto, Yoichi Kushioka, Mitsuhiro Takashima
  • Patent number: 10554317
    Abstract: Methods for tracking a signal origin by a spectrum analysis and management device are disclosed. Signal characteristics of other known emitters are used for obtaining a position of an emitter of a signal of interest. In one embodiment, frequency difference of arrival technique is implemented. In another embodiment, time difference of arrival technique is implemented.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: February 4, 2020
    Assignee: DIGITAL GLOBAL SYSTEMS, INC.
    Inventors: Gabriel R. Garcia, Daniel Carbajal
  • Patent number: 10551507
    Abstract: A global navigation satellite system (GNSS) receiver including a sequential chip mixed frequency correlator array system (SCMFCAS) is provided. The SCMFCAS includes P signal generators, each receiving N samples of intermediate frequency (IF) data of a GNSS signal. Each signal generator includes a primary mixer, a pseudo random noise code generator, and Q mixed frequency correlators (MFCs). Each MFC generates accumulated correlation components of the N samples of the IF data by processing the N samples of the IF data. Adders and subtractors operably connected to the SCMFCAS are time division multiplexed for generating correlation values of a positive frequency and a negative frequency of the N samples of the IF data by combining the accumulated correlation components. Time division multiplexing the adders and the subtractors across the SCMFCAS and generation of the correlation values reduce logic area of the SCMFCAS, thereby reducing power consumption of the GNSS receiver.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: February 4, 2020
    Assignee: Accord Ideation Private Limited
    Inventors: Gowdayyanadoddi Shivaiah Naveen, Smitha Shrinivasa Nayak, Varsha Bhupal Bavache
  • Patent number: 10436911
    Abstract: A method and a system for reducing time to first fix (TTFF) in a satellite navigation receiver generate a navigation data structure including three sub-frames. A first sub-frame and a second sub-frame accommodate selective ephemeris data. The third sub-frame accommodates a text message including almanac data optionally, ionospheric data, coordinated universal time (UTC) data, textual data optionally, and any combination thereof. A signal generation system (SGS) in the system selectively groups the almanac data, the ionospheric data, and the UTC data, and selectively transmits the navigation data with the almanac data or free of the almanac data in the navigation data structure to the satellite navigation receiver. The signal generation system also staggers the navigation data in each sub-frame into a first portion and a second portion for parallelly transmitting the navigation data over a first carrier frequency and a second carrier frequency in reduced time.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: October 8, 2019
    Inventors: Vyasaraj Guru Rao, Sashidharan Maa, Gerard Lachapelle
  • Patent number: 10386494
    Abstract: This determination method for determining a wrong synchronization including the steps of determining an ad hoc correlator corresponding to the value of correlation between the received signal and the local signal, and determining N additional correlators corresponding to the values of correlation between the received signal and an offset signal, each offset signal including a spreading code that is offset in relation to the local spreading code, and determining a value for the amount of inconsistency between the frequency of the local carrier wave and the frequency of the local spreading code; if the value of inconsistency is higher than a predetermined threshold value of inconsistency, determining a wrong synchronization; otherwise, determining an indicator of wrong synchronization as a function of the correlators determined, comparing the indicator of wrong synchronization with at least one threshold value, determining a wrong synchronization based on the result of the comparison.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: August 20, 2019
    Assignee: THALES
    Inventors: Nicolas Martin, Yves Clauzel
  • Patent number: 10263763
    Abstract: Exemplary systems and methods can be provided for measuring a parameter—e.g., channel impulse response and/or power delay profile—of a wideband, millimeter-wave (mmW) channel. The exemplary systems can include a receiver configured to receive a first signal from the channel, generate a second signal, and measure the parameter based on a comparison between the first and second signals; and a controller configured to determine first and second calibration of the system before and after measuring the parameter, and determine a correction for the parameter measurement based on the first and second calibrations. Exemplary methods can also be provided for calibrating a system for measuring the channel parameter. Such methods can be utilized for systems in which the TX and RX devices share a common frequency source and for systems in which the TX and RX devices have individual frequency sources that free-run during channel measurements.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: April 16, 2019
    Assignee: New York University
    Inventors: Theodore Rappaport, George R. MacCartney
  • Patent number: 10241210
    Abstract: A method and a system for reducing time to first fix (TTFF) in a satellite navigation receiver generate a navigation data structure including three sub-frames. A first sub-frame and a second sub-frame accommodate selective ephemeris data. The third sub-frame accommodates a text message including almanac data optionally, ionospheric data, coordinated universal time (UTC) data, textual data optionally, and any combination thereof. A signal generation system (SGS) in the system selectively groups the almanac data, the ionospheric data, and the UTC data, and selectively transmits the navigation data with the almanac data or free of the almanac data in the navigation data structure to the satellite navigation receiver. The signal generation system also staggers the navigation data in each sub-frame into a first portion and a second portion for parallelly transmitting the navigation data over a first carrier frequency and a second carrier frequency in reduced time.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: March 26, 2019
    Assignee: ACCORD SOFTWARE & SYSTEMS PVT. LTD.
    Inventors: Vyasaraj Guru Rao, Sashidharan Maa, Gerard Lachapelle
  • Patent number: 10170821
    Abstract: The present invention relates to a communication node arrangement comprising at least two antenna units. Each antenna unit comprises at least one signal port and at least one antenna element, where each signal port is connected to at least one corresponding antenna element. Each antenna unit comprises at least one sensor unit arranged to sense its orientation relative a predetermined reference extension. The communication node arrangement comprises at least one control unit and is arranged to feed a respective test signal into each of at least two different signal ports. For each such test signal, the communication node arrangement is arranged to receive the test signal via at least one other signal port. The communication node arrangement being arranged to determine relative positions of said antenna units based on the received test signals, and to determine relative orientations of said antenna units based on data received from the sensor units.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: January 1, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Lars Persson, Torbjörn Elfström
  • Patent number: 10126428
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: November 13, 2018
    Assignee: Cornell University
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Patent number: 9984341
    Abstract: Industrial vehicles communicate across a wireless environment and the wireless communication, data collection and/or processing capabilities of industrial vehicles are leveraged against robust software solutions to implement enterprise wide vehicle management functions, to integrate industrial vehicle data into existing enterprise workflows and/or to enable trusted third party integration into the enterprise for enhanced asset and/or workflow management. Still further, wireless communication, data collection and/or processing capabilities of industrial vehicles are leveraged with robust software solutions that aggregate and analyze data across multiple enterprises and/or promote the exchange of information between independent entities.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: May 29, 2018
    Assignee: Crown Equipment Corporation
    Inventors: Timothy A. Wellman, Dean E. Winner
  • Patent number: 9903955
    Abstract: The present invention relates to a method for improving Time To First Fix, TTFF, sensitivity and accuracy, wherein a Global Navigation Satellite System, GNSS, positioning device (15), communicates with a Core Service (11) in a User Equipment (16), U—the GNSS positioning device acquires (23) GNSS satellite signals and navigation data and based on said signals/data determines a position within TTFF,—the Core Service detects (24) user data indicating specific user behaviors and initiates said determination of position based on said user data. The present invention also relates to a Core Service, a Global Navigation Satellite System, GNSS, positioning device, a Radio Module and a User Equipment, UE, adapted for the same purpose.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: February 27, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Torbjorn Elfstrom, Lars Persson
  • Patent number: 9727030
    Abstract: An electronic timepiece comprises a receiver configured to receive satellite signals containing time information from positioning information satellites; an interface member; a timekeeping reception controller configured to execute a timekeeping reception process in response to a timekeeping reception operation of the interface member; and a positioning reception controller configured to execute a positioning reception process in response to a positioning reception operation of the interface member. The timekeeping reception controller starts the timekeeping reception process if the interface member is operated continuously for a first set time, and continues the timekeeping reception process if operation of the interface member is released before a second set time passes, the second set time being longer than the first set time, and operation switches from the timekeeping reception process to the positioning reception process if the interface member is operated for the second set time.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: August 8, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Teruhiko Fujisawa
  • Patent number: 9712207
    Abstract: According to the invention, a data stream with continuous, periodic transmitted, spread data signals of N chips each is split into two data streams of N chips each, which are shifted by N chips; for each of these data streams the correlation functions are calculated within every chip clock time and, in relation to their maxima, evaluated in order to separate user signals from extraneous signals and disturbing signals.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: July 18, 2017
    Inventor: Reinhart Rudershausen
  • Patent number: 9639067
    Abstract: A timepiece can acquire time information in a short time, reduce power consumption, and display the correct time. A timepiece comprises a receiver to receive a satellite signal, and a time information generator to generate internal time information. The receiver runs a first reception process that acquires first information including week information from the satellite signal, a second reception process that acquires second information including leap second information from the satellite signal, or a third reception process that acquires third information including hour, minute and second information from the satellite signal. In the first reception timing, after the internal time information is initialized, the receiver runs the first reception process and runs the second reception process after running the first. In a next reception timing, after the first reception timing, the receiver runs the third reception process if the first and second information are acquired in the first reception timing.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: May 2, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Norimitsu Baba
  • Patent number: 9510251
    Abstract: A continual learning process is applied to a class of risk estimate-based algorithms and associated risk thresholds used for deciding when to initiate a handoff between different types of network connections that are available to a mobile device having telephony functionality. The process is implemented as a virtuous loop providing ongoing tuning and adjustment to improve call handoff algorithms and risk thresholds so that handoffs can be performed with the goals of minimizing dropped calls and unacceptable degradation in call quality as well as avoiding premature handoffs. Device characteristics, environmental context, connection measurements, and outcomes of call handoff decisions are crowd-sourced from a population of mobile devices into a cloud-based handoff decision enabling service.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: November 29, 2016
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Gursharan S Sidhu, Thomas Kuehnel, Rao Salapaka, Vishal Soni, Ranveer Chandra, Mansoor Jafry, Anish Desai, Ruchir Astavans, Humayun Khan, John Mark Miller
  • Patent number: 9420547
    Abstract: A method and an apparatus for setting a working mode of power amplifier (PA) blanking are disclosed, which resolve a problem that, in the prior art, when a Global System for Mobile Communications (GSM) is working, because a PA blanking function cannot be configured flexibly to an enabled state or a disabled state, quality of a Global Positioning System (GPS) receiving signal is degraded. When a GPS is running, it is detected, at a preset interval, whether a GSM service is running. When the GSM service is running, a current quantity of timeslots occupied by the GSM service and a current power control level used by the GSM service are acquired.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: August 16, 2016
    Assignee: Huawei Device Co., Ltd.
    Inventors: Shan Gao, Tongbo Wang, Wenfeng Yao, Junjun Zhu
  • Patent number: 9322924
    Abstract: A frequency synthesizer in a GNSS receiver chip enables duty cycling operation of the frequency synthesizer. The frequency synthesizer is cycled on to generate required clock signals for the GNSS receiver chip, and cycled off during a measurement duty cycle comprising measurement available intervals and measurement unavailable intervals. A reference clock inputted to the frequency synthesizer is on during the measurement duty-cycle. During the measurement available intervals, the frequency synthesizer is cycled on to generate the required clock based on the reference clock. During the measurement unavailable intervals, the frequency synthesizer is cycled off and clock timing is maintained based on the reference clock. A number of elapsed clock cycles of the reference clock is captured for a measurement unavailable interval and transferred to a clock offset. The GNSS receiver chip processes signals received using the required clock and the clock offset in a following measurement available interval.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: April 26, 2016
    Assignee: Broadcom Corporation
    Inventor: Charles Abraham
  • Patent number: 9297905
    Abstract: A method of acquiring a satellite signal includes providing a CDMA-modulated signal, defining a first search frequency interval and a first reception sensitivity, and performing a first acquisition of the modulated signal according to the first sensitivity and the first frequency interval in order to provide an acquisition or failed acquisition result. In case of a failed acquisition, performing a second acquisition of the modulated signal as a function of a second search frequency interval, narrower than the first frequency interval, and a second reception sensitivity, greater than the first sensitivity and depending on a power of a side lobe of the modulated signal.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 29, 2016
    Assignee: STMicroelectronics S.r.l.
    Inventor: Domenico Di Grazia
  • Patent number: 9229435
    Abstract: A GPS wristwatch has a reception mode setting unit that sets a reception mode of a reception unit; and a locking level setting unit that sets a locking performance. The reception mode setting unit sets the reception mode to an automated timekeeping mode when an automated reception condition is met; sets the reception mode to a manual timekeeping mode when a first operation of an input unit is detected; and sets the reception mode to a positioning mode when a second operation of the input unit is detected. The locking level setting unit sets the locking performance to a high level when the reception mode is set to the manual timekeeping mode or the positioning mode, and sets the locking performance to a low level that is lower than the high level when the reception mode is set to the automated timekeeping mode.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: January 5, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Jun Matsuzaki
  • Patent number: 9207329
    Abstract: A satellite-based positioning system (SPS) signal processing technique re-samples a received series of PRN sequences from an SPS satellite to align them with a nominal sampling rate for a corresponding series of perfect reference PRN replica sequences.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: December 8, 2015
    Inventors: Farrokh Farrokhi, Edmund Gregory Lee, Dickson Wong
  • Patent number: 9176231
    Abstract: A system and methods for reducing navigation satellite receiver power usage are presented. A wireless signal is received at a portable electronic device in a signal environment. At signal characteristic of the wireless signal at the portable electronic device is measured in the signal environment. An estimated signal strength of the wireless signal in the signal environment is estimated based on the signal characteristic. The estimated signal strength is compared to an expected signal strength of the wireless signal to calculate an estimated signal-strength-change relative to the expected signal strength. A GNSS signal is tracked at the portable electronic device, if the estimated signal-strength-change indicates an expected GNSS signal attenuation is lower than a signal attenuation threshold.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: November 3, 2015
    Assignee: The Boeing Company
    Inventors: David A. Whelan, Gregory M. Gutt, Michael L. O'Connor
  • Patent number: 9170567
    Abstract: In a satellite radio-controlled wristwatch, a time to be spent on acquisition and tracking is reduced and also a reception success probability is increased.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: October 27, 2015
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Akira Kato
  • Patent number: 9121937
    Abstract: A method and chipset for tracking a global navigation satellite system (GNSS) within the constraints of an indoor facility. The method includes receiving assistance information on the GNSS on a mobile communication system; and sorting orbiting satellites within the GNSS by elevation angles. Additionally, lower elevation satellites are correlated within the GNSS prior to correlating higher elevation satellites.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: September 1, 2015
    Assignee: Google Technology Holdings LLC
    Inventors: Benjamin O. White, Jin D. Kim, Sang Eun Lee
  • Patent number: 9086477
    Abstract: An anti-jamming subsystem for jamming signals originating along the horizon includes a two-dimensional horizontal array of antennas that effectively has a horizontal circular reception pattern for receiving signals originating along the horizon and a antenna that has a half hemispherical reception pattern and an upward looking view of the sky. The subsystem utilizes associated phase information to actively combine the signals received by the respective antennas in the array, to produce one or more anti-jamming signals with narrow beams in the directions of the jammers. The subsystem combines the anti-jamming signals with the signals received by the reference antenna, to produce signals for further processing in which the interference from the jamming signals originating along the horizon is minimized without adversely affecting the signals received by the reference antenna from at least higher elevation satellites.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: July 21, 2015
    Assignee: NovAtel Inc.
    Inventor: Patrick C. Fenton
  • Patent number: 9084190
    Abstract: An apparatus and a method for inter-vehicle communication includes a communicator communicating with another vehicle and a position determiner verifying position information of a vehicle, A controller is configured to synchronize a time point of transmitting/receiving a message to/from the other vehicle through a signal from the position determiner, performing a phase control for transmitting message, and transmitting the message to the other vehicle at a determined time point of transmitting the message according to the phase control result.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: July 14, 2015
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Dong Gyu Noh, Jong Rok Park, Su Lyun Sung, Yong Tae Park, Byung Jo Kim, Seung Nam Yang, Ji Hun Ha, Sung Heon Lim, Hyo Gon Kim
  • Patent number: 9008243
    Abstract: An approach is provided for correcting a reference clock of a GPS receiver. The approach involves determining one or more frequency offset values. The approach also involves determining one or more codes associated with one or more satellites. The approach further involves determining a second code associated with the one or more satellites. The approach additionally involves determining one or more delay values between the second code and the one or more first codes. The approach also involves determining one or more proportional values based on the one or more delay values and a determined correlation. The approach further involves determining one or more correlation peak values and determining one or more estimated frequency offset error values based on the one or more correlation peak values. The approach additionally involves causing a calibrated reference clock frequency value to change to a recalibrated reference clock frequency value based on the estimated frequency offset error values.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: April 14, 2015
    Assignee: Intel Corporation
    Inventors: Anthony L. Chun, Yi Lin
  • Publication number: 20150097727
    Abstract: A ground station antenna including a torus shaped reflector having multiple feed points along a focal arc in front of the reflector. The ground station antenna includes transceiver feeds having their electrical phase centers located on the focal arc and supported by a rotating feed platform. The transceiver feeds are configured to simultaneously track rising and falling satellites when the platform rotates. The ground station antenna further includes a wireless power receiver coupled to the transceiver feeds to power the transceiver feeds. The ground station antenna further includes a wireless signal interface coupled to the transceiver feeds to communicate signals with a base unit to perform subsequent processing.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 9, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Ernest Tadashi Ozaki, William G. Ames, Ahmad Jalali
  • Publication number: 20150097728
    Abstract: Control and feature systems for processing signals from a satellite positioning system include an expert system receiver manager; a joint detection, carrier centring and bit sync acquisition subsystem; peak detection; a multi-dimensional measurement interpolation subsystem; a system for mode switching between a navigational signal; and power control module for receiver.
    Type: Application
    Filed: December 12, 2014
    Publication date: April 9, 2015
    Inventors: Mangesh Chansarkar, Sundar Raman, Charles P. Norman, Paul A. Underbrink, Henry D. Falk, James Brown, Robert Harvey, Peter Michali, William Higgins, Gensheng Zhang, Qingwen Zhang
  • Publication number: 20150091752
    Abstract: A satellite signal searching method includes: determining, based on transmitted signal information in which whether satellite signals are transmitted from positioning satellites is managed for each signal type, and characteristics of the signal types, the order of searching the satellite signals.
    Type: Application
    Filed: September 10, 2014
    Publication date: April 2, 2015
    Inventors: Kiyotaka MURAKI, Tomoyuki KURATA
  • 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: 20150022397
    Abstract: Asynchronous Global Positioning System (GPS) baseband processor architectures with a focus on minimizing power consumption. All subsystems run at their natural frequency without clocking and all signal processing is done on-the-fly.
    Type: Application
    Filed: February 25, 2013
    Publication date: January 22, 2015
    Inventors: Rajit Manohar, Benjamin Tang, Stephen Longfield, Sunil A. Bhave
  • Publication number: 20150015438
    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: Application
    Filed: September 25, 2013
    Publication date: January 15, 2015
    Applicant: Texas Instruments Incorporated
    Inventors: Karthik SUBBURAJ, Karthik Ramasubramanian, Jawaharlal Tangudu
  • Publication number: 20150015439
    Abstract: A navigation receiver operably coupled to an antenna can determine location by receiving and processing radiofrequency navigation signals from global navigation satellites. The navigation receiver includes a quartz crystal oscillator that serves as a reference frequency source for a local oscillator signal that is mixed with the radiofrequency navigation signals to generate intermediate signals at intermediate frequencies lower than the radiofrequencies. In particular applications, the quartz crystal oscillator and the antenna are subjected to vibration and shock. A shift in the frequency or phase of the intermediate signals can result, and performance of phase-lock loops can degrade. Performance is improved with a phase-lock loop that processes a combination of individual channel control signals and common control signals.
    Type: Application
    Filed: April 11, 2013
    Publication date: January 15, 2015
    Applicant: TOPCON POSITIONING SYSTEMS INC.
    Inventors: Andrey Vladimirovich Veitsel, Mark Isaakovich Zhodzishsky, Vladimir Victorovich Beloglazov, Dmitry Pavlovich Nikitin
  • Patent number: 8933838
    Abstract: A global navigation satellite system configured to operate in a noisy environment receives the same satellite signals in two separate channels. Each channel processes the signals independently according to different filtering constraints; one channel applies narrow filtering constraints while the other channel applies broader filtering constraints. Narrow filtering constraints allow the receiver to acquire a usable signal under certain conditions but not while moving rapidly. Broader filtering constraints allow the receiver to acquire a usable signal during rapid movement, but cannot overcome intense interference. A device implementing both constraint options is usable under a wider range of situations.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: January 13, 2015
    Assignee: Rockwell Collins, Inc.
    Inventor: Charles A. Popeck
  • 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: 8907843
    Abstract: A method of processing signals from a satellite positioning system, comprises receiving (50) recorded blocks of data samples of satellite broadcast, each block including one or more timestamps generated within a receiver at which the samples were recorded, and processing (52) the recorded blocks of data samples using a first set of processing parameters to identify satellite transmissions contained within the blocks. Based on the results of the processing (52), one of the blocks is selected (56,58). The selected block is processed (60) using a second set of processing parameters to derive at least position and satellite broadcast timing information. The timestamp of the selected block and the timing information obtained from the processing (60) of the selected block is used to assist in the processing (60) of the other blocks.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: December 9, 2014
    Assignee: U-Blox AG
    Inventors: Saul Robin Dooley, Andrew Thomas Yule
  • Publication number: 20140347219
    Abstract: A receiver for a multi-mode navigation system includes a base band unit and a calculation unit. The base band unit is configured for allocating resources to positioning satellites in each of one or more navigation system, and tracking the positioning satellites with the allocated resources to obtain satellite information of each of the positioning satellites. The satellite information includes one or more of pseudo-ranges, position coordinates, velocity information, and frequency information of the positioning satellites. The calculation unit is configured for receiving the satellite information from the base band unit, evaluating the positioning satellites in each navigation system, and determining a positioning parameter of the receiver. Determination of the positioning parameter includes calculating a position and a velocity of the receiver based on the satellite information according to a least square algorithm.
    Type: Application
    Filed: March 20, 2014
    Publication date: November 27, 2014
    Applicant: O2Micro Inc.
    Inventors: Juan Gou, Jinghua Zou, Weihua Zhang
  • Publication number: 20140347218
    Abstract: A receiver associated with a positioning system is provided. The receiver comprises a tracking loop and a signal strength calculating module. The tracking loop is configured for tracking a positioning signal and generating an in-phase signal and a quadrature signal based on the positioning signal. The signal strength calculating module is configured for calculating a first evaluation value and a second evaluation value related to the positioning signal based on the in-phase signal and the quadrature signal, respectively, and determining a status of the tracking loop based on at least one of the first evaluation value and the second evaluation value.
    Type: Application
    Filed: March 5, 2014
    Publication date: November 27, 2014
    Applicant: O2MICRO INC.
    Inventors: Ke GAO, Deyu TANG, Shenghong Lu
  • Publication number: 20140327575
    Abstract: A method and a system for reducing time to first fix (TTFF) in a satellite navigation receiver generate a navigation data structure including three sub-frames. A first sub-frame and a second sub-frame accommodate selective ephemeris data. The third sub-frame accommodates a text message including almanac data optionally, ionospheric data, coordinated universal time (UTC) data, textual data optionally, and any combination thereof. A signal generation system (SGS) in the system selectively groups the almanac data, the ionospheric data, and the UTC data, and selectively transmits the navigation data with the almanac data or free of the almanac data in the navigation data structure to the satellite navigation receiver. The signal generation system also staggers the navigation data in each sub-frame into a first portion and a second portion for parallelly transmitting the navigation data over a first carrier frequency and a second carrier frequency in reduced time.
    Type: Application
    Filed: September 5, 2013
    Publication date: November 6, 2014
    Applicant: Accord Software & Systems Pvt. Ltd.
    Inventor: Vyasaraj Guru Rao
  • Publication number: 20140313078
    Abstract: The present invention relates to a method for improving Time To First Fix, TTFF, sensitivity and accuracy, wherein a Global Navigation Satellite System, GNSS, positioning device (15), communicates with a Core Service (11) in a User Equipment (16), U—the GNSS positioning device acquires (23) GNSS satellite signals and navigation data and based on said signals/data determines a position within TTFF,—the Core Service detects (24) user data indicating specific user behaviours and initiates said determination of position based on said user data. The present invention also relates to a Core Service, a Global Navigation Satellite System, GNSS, positioning device, a Radio Module and a User Equipment, UE, adapted for the same purpose.
    Type: Application
    Filed: November 14, 2011
    Publication date: October 23, 2014
    Applicant: Telefonaktiebolaget L M Ericsson (pulb)
    Inventors: Torbjorn Elfstrom, Lars Persson
  • Publication number: 20140313079
    Abstract: A system and method for improving acquisition sensitivity and tracking performance of a GPS receiver using multiple antennas is provided. In an embodiment, the acquisition sensitivity can be improved by determining the correlation weight of each received path signal path associated with one antenna form a plurality of antennas and then combining the path signals based on their respective correlation weight. In another embodiment, carrier offset correction information of each path signal is individually determined and then summed together to be used for tracking the code phase in a code phase tracking loop. The code phase tracking loop generates an early code and a late code that are used to determine the code phase error. The system includes notch and bandpass filters to mitigate narrowband and broadband noises of a received GPS signal, wherein the digital adaptive filters are switched on periodically or by external events.
    Type: Application
    Filed: January 16, 2014
    Publication date: October 23, 2014
    Applicant: MaxLinear, Inc.
    Inventors: Anand K. ANANDAKUMAR, Maxime LeCLERCQ
  • Publication number: 20140300514
    Abstract: A method and an apparatus for acquiring a signal of a global navigation satellite system (GNSS) are provided. The method includes: performing a first satellite signal acquiring operation based on an initially set Doppler frequency search start value and an initially set Doppler frequency search interval value; and changing the initially set Doppler frequency search start value and performing a second satellite signal acquiring operation when a satellite signal is not found through the first satellite signal acquiring operation.
    Type: Application
    Filed: November 27, 2013
    Publication date: October 9, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jeong-sang LEE
  • Patent number: 8855171
    Abstract: A technique for reducing the dwell time in acquiring a satellite signal is provided. The technique minimizes the dwell time in searching for a satellite signal in cells of a search space by comparing the peak-power-to-average ratio (PAPR) to one or more thresholds at one or more intermediate points during the search in a code phase/Doppler frequency bin. The comparison is then used to determine whether to continue the search in a current code phase/Doppler frequency bin or to continue to the next code phase/Doppler frequency bin.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: October 7, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Chih-Yuan Chu, Hao Zhou, Hao-Jen Cheng, Qinfang Sun
  • Patent number: 8848490
    Abstract: A reception apparatus includes a first determination unit to determine whether a state exists in which timing information and six orbital elements information can be obtained from GPS signals transmitted by only two GPS satellites. When the state exists, a calculation unit calculates a trajectory line having a predetermined width on a surface of the earth, based on the GPS signals transmitted by the two satellites. A second determination unit determines whether the trajectory line traverses a district of use stored by the apparatus. A time correcting unit obtains a current time using the obtained timing information, by correcting the timing information based on a time zone corresponding to the district of use, when the trajectory line traverses the district of use. The time correcting unit does not obtain the current time using the obtained timing information when the trajectory line does not traverse the district of use.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: September 30, 2014
    Assignee: Casio Computer Co., Ltd.
    Inventor: Toshio Hanabusa
  • Publication number: 20140266885
    Abstract: Described are systems and methods for time synching.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: NextNav, LLC
    Inventors: Arun Raghupathy, Jagadish Venkataraman