Class / Patent application number | Description | Number of patent applications / Date published |
342357680 | Carrier related (IPC) | 26 |
20110037652 | Cross-PRN Phase Correction for GPS Processing - Methods and systems are provided for accessing GPS signals in faded environments. Means are provided for predicting the nonlinear phase induced by the receiver's own clock, when there is at least one GPS satellite link strong enough to calculate a phase profile. In an embodiment, GPS signals are accessed in faded environments by increasing the sensitivity of a GPS receiver by increasing the processing gain of received GPS signals through increased integration time. Matching a near-baseband signal requires removing a nonlinear part of the phase which may arise from several sources, including: the phase drift of the GPS satellite's atomic clock, the phase drift due to the motion of the GPS receiver, the phase drift due to the motion of the GPS satellite, and the phase drift due to the GPS receiver's clock. | 02-17-2011 |
20110109506 | Simulating Phase-Coherent GNSS Signals - A method and apparatus for simulating radio-frequency Global Navigation Satellite System (GNSS) signals that are carrier-phase and code-phase aligned with ambient GNSS signals at a user-specified location in the vicinity of the simulator. Such phase alignment allows the synthesized signals to be made to appear substantially the same as the authentic signals to a target receiver, allowing the target receiver to transition seamlessly between authentic and simulated signals. The method is embodied in a device, a phase-coherent GNSS signal simulator, which can be implemented on a digital signal processor for embedded applications. | 05-12-2011 |
20110181466 | RECEIVER AND METHOD FOR AUTHENTICATING SATELLITE SIGNALS - A receiver is configured to authenticate received satellite signals having a carrier wave carrying positioning data. The receiver includes a processor arrangement configured to analyze the carrier wave to determine an apparent acceleration between the satellite and receiver. The processor arrangement is also configured to compare the apparent acceleration between the satellite and receiver with a threshold value to determine if the satellite signal is authentic. | 07-28-2011 |
20110260916 | METHOD FOR BUILDING A VIBRATION-RESISTANT NAVIGATIONAL SATELLITE SIGNALS RECEIVER AND A DEVICE FOR RECEIVING AND PROCESS NGNAVIGATION SIGNALS - The effects of shock and vibration on a navigation receiver processing satellite signals received from global navigation satellites are reduced by controlling the frequency and the phase of the individual numerically controlled oscillator in each individual satellite channel. The frequency is controlled by an individual frequency control signal based on individual correlation signals generated in an individual satellite channel. The phase is controlled by a common phase control signal or a combination of a common phase control signal and an individual phase control signal. The common phase control signal is based on all the correlation signals generated in all the satellite channels processed by a separate common broadband quartz loop (SCBQL). An individual phase control signal is based on the individual correlation signals generated in an individual satellite channel. | 10-27-2011 |
20110285588 | DEVICE FOR DISCRIMINATING THE PHASE AND THE PHASE VARIATION OF A SIGNAL - In a phase discriminator device for receiving, as input, a complex signal whose argument represents a phase error, and for producing, as output, an estimate of the phase error for each signal sample Z | 11-24-2011 |
20120026038 | GNSS Signal Processing Methods and Apparatus - Methods and apparatus are provided for processing a set of GNSS signal data derived from observations of GNSS signals of multiple transmitters over multiple epochs, the GNSS signals having a first signal and a second signal in a first band which can be tracked as a single wide-band signal and each of which can be tracked separately, comprising: obtaining carrier-phase observations of the first signal, obtaining carrier-phase observations of the second signal, obtaining code observations of the wide-band signal, and estimating from a set of observables comprising the carrier-phase observations of the first signal, the carrier-phase observations of the second signal and the code observations of the wide-band signal values for a set of parameters comprising: position of a receiver of the GNSS signals, clock error of a receiver of the GNSS signals, and an array of ambiguities comprising an ambiguity for each transmitter from which carrier-phase observations of the first signal are obtained and an ambiguity for each transmitter from which carrier-phase observations of the second signal are obtained. | 02-02-2012 |
20120188125 | METHOD AND SYSTEM FOR USE OF GPS DISCIPLINED OSCILLATORS FOR COHERENT TIMING REFERENCE IN DISTRIBUTED RADAR SYSTEMS - An active electronically scanned array radar system and method uses a coherent, stable timing reference to transmit phase synchronized radar signals from a plurality of receiver/exciter elements. A global positioning system (GPS) carrier phase disciplined oscillator receives the GPS carrier signal at a GPS receiver. The GPS carrier contains phase and timing information to phase synchronize the local clock with the GPS carrier to produce a reference clock signal. The reference clock signal is used to synchronize a frequency synthesizer oscillator clock and generate a stable timing reference signal at a frequency significantly greater than the reference clock frequency. The stable timing reference is used to transmit radar signals in a receiver/exciter pair, the radar signals phase synchronized with the GPS carrier signal. Each receiver/exciter element generates its own stable timing reference based on a common GPS carrier. The radar signals from the plurality of receiver/exciter elements use a common clock without need of a physical distribution mechanism. | 07-26-2012 |
20120188126 | Synthetic Aperture Antenna Device for Transmitting Signals of a Satellite Navigation System Comprising a Carrier and Means for Determining its Trajectory - A synthetic aperture antenna device for transmitting signals of a system includes a carrier and means for determining its trajectory, and, for each signal respectively associated with a spatial direction, processing means suitable for generating a stationary phase signal over a time window corresponding to the distance traveled by the device throughout the period of coherent integration, before modulation of the received signal, the processing means comprising correction means suitable for correcting the carrier phase of the signal. | 07-26-2012 |
20120293367 | GNSS Signal Processing with Regional Augmentation Network - Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospheric delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections. The correction data comprises at least one code bias per satellite, a fixed-nature MW bias per satellite and/or values from which a fixed-nature MW bias per satellite is derivable, and an ionospheric delay per satellite for each of multiple regional network stations and/or non-ionospheric corrections. Methods and apparatus for encoding and decoding the correction messages containing correction data are also presented, in which network messages include network elements related to substantially all stations of the network and cluster messages include cluster elements related to subsets of the network. | 11-22-2012 |
20120326926 | HIGH SENSITIVITY GPS/GNSS RECEIVER - The GPS/GNSS receiver and method disclosed herein improves the GPS/GNSS receiver tracking sensitivity for detecting low signal-to-noise (SNR) GPS/GNSS signals through improved vector tracking, multibit correlation, improved extended range code-phase discrimination, and discrimination and navigation filter measurement via Probabilistic Data Association, individually or in combination. The solution is achieved without any external data aiding, such as from an inertial measurement unit, other wireless infrastructure source, or communication of GPS/GNSS satellite vehicle (SV) subframe data to the GPS/GNSS receiver over a data link. | 12-27-2012 |
20130093621 | RECEIVING DEVICE, RECEIVING METHOD AND MOBILE TERMINAL - Provided is a receiving device, including a receiving unit that receives a signal from a satellite in a GPS, a frequency converting unit that converts a frequency of a reception signal received by the receiving unit into a predetermined IF, a synchronization acquiring unit that performs synchronization acquisition for detecting a phase of a spread code in the IF signal and detects a carrier frequency in the IF signal, a synchronization holding unit that assigns and sets the phase of the spread code and the carrier frequency detected by the synchronization acquiring unit to a plurality of channels, holds synchronization of the spread code and a carrier using the set phase of the spread code and the carrier frequency, and demodulates a message included in the IF signal, and a control unit that executes operation control including a positioning calculation using the message demodulated by the synchronization holding unit. | 04-18-2013 |
20130099970 | POSITIONING APPARATUS AND SIGNAL PROCESSING METHOD THEREOF - A signal processing method of a positioning apparatus includes the following steps. A satellite signal is received to provide at least a distance information. A correction value of a phase measurement time is generated according to the distance information and phase data of the satellite signal are corrected in sequence accordingly. The phase data are received and when a quantity of the phase data is equal to a preset quantity, a first low order polynomial fitting and a first Chi-square test are performed to generate an estimated parameter. A next phase data of the satellite signal is estimated to generate an estimated phase data according to the estimation parameter. An actual phase data is obtained. A detection and a compensation of a cycle slip are performed according the estimated phase data and the actual phase data to output a corrected phase observation value. | 04-25-2013 |
20130169479 | Method and Apparatus for Managing Tracking Loops For Enhanced Sensitivity Tracking of GNSS Signals - The present invention is related to location positioning systems, and more particularly, to a method and apparatus for making accuracy improvements to a GPS receiver's navigation calculations. According to a first aspect, the invention includes extreme sensitivity GNSS tracking loops. In embodiments, the tracking loops are self-bandwidth normalizing and the loop bandwidths automatically narrow with reduced CNO. | 07-04-2013 |
20130249735 | DEVICE FOR RECEIVING RADIO-NAVIGATION SIGNALS WITH MULTIPLE ANTENNAS AND COMMON SYNCHRONIZATION SLAVING - The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier, in demodulating the signals received by each antenna separately and then in combining the various demodulated signals, thereby amounting to effecting a beam forming in an equivalent antenna pattern. The invention then requires only a single synchronization slaving for the set of demodulation pathways. | 09-26-2013 |
20140055301 | Method and System for Adjusting a Measurement Cycle in a Wireless Receiver - A method for adjusting a frequency of a measurement cycle in a wireless receiver is described. The method includes adjusting a measurement cycle in a wireless receiver by computing a position state comprising at least one of a velocity and a heading of the satellite signal receiver, detecting a change in the position state, and automatically adjusting a frequency of said measurement cycle in response to the change in the position state. | 02-27-2014 |
20140091966 | MULTI-ANTENNA RADIO-NAVIGATION SIGNALS RECEPTION DEVICE - The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier and in demodulating the signals received by each antenna separately. The diversity of the demodulation chains is utilized to compensate the signal loss on one of the chains when the corresponding antenna experiences a signal loss due to the masking of the satellite by the carrier. | 04-03-2014 |
20140125522 | METHOD OF GENERATING CORRELATION FUNCTION WITH NO SIDE-PEAK AND SYSTEM FOR TRACKING BINARY OFFSET CARRIER SIGNAL - Disclosed herein are a method of generating a correlation function with no side-peak and a system for tracking a BOC signal in order to synchronize the BOC signal. The method of generating a correlation function includes step S | 05-08-2014 |
20140191903 | Radionavigation signal tracking device - A radionavigation signal tracking device comprises a first and a second tracking stage for radionavigation signals. The first tracking stage comprises a first carrier phase-locked loop. The latter produces a first error signal arising from a phase difference between the first carrier and its replica. The phase of the replica of the first carrier is adjusted with the first error signal. The second tracking stage comprises a second carrier phase-locked loop. The latter produces a second error signal arising from a difference between the first phase difference and a phase difference between the second carrier and the replica thereof. The phase of the replica of the second carrier is adjusted with the first and second error signals. | 07-10-2014 |
20140313079 | GPS ANTENNA DIVERSITY AND NOISE MITIGATION - 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. | 10-23-2014 |
20140347220 | SATELLITE RECEIVER AND METHOD FOR ASSESSING TRACKING LOOP QUALITY OF SATELLITE RECEIVER - A method for assessing tracking loop quality of a satellite receiver is disclosed. The method includes obtaining a carrier-to-noise power density ratio (CN0) of a tracking loop which tracks a satellite signal; generating a statistical value associated with the CN0 based on output values from a discriminator of the tracking loop; and assessing a quality of the tracking loop based on the CN0 and the statistical value. | 11-27-2014 |
20150022398 | METHOD AND PROGRAM OF DETECTING POSITIONING SIGNALS, POSITIONING SIGNAL RECEPTION DEVICE, POSITIONING APPARATUS AND INFORMATION EQUIPMENT TERMINAL - Whether received positioning signals are target positioning signals is determined accurately. A first code phase difference of a first replica code signal of a positioning signal St | 01-22-2015 |
20150138016 | METHOD FOR GENERATING UNAMBIGUOUS CORRELATION FUNCTION FOR CBOC (6,1,1/11) SIGNAL BASED ON PARTIAL CORRELATION FUNCTIONS, APPARATUS FOR TRACKING CBOC SIGNALS AND SATELLITE NAVIGATION SIGNAL RECEIVER SYSTEM - A method of generating a correlation function for a CBOC(6,1,1/11) signal according to the present invention includes generating a delayed signal delayed based on a phase delay, with respect to a signal pulse train of a CBOC(6,1,1/11)-modulated received signal, generating first to twelfth partial correlation functions by performing an autocorrelation operation of the received signal and the delayed signal with respect to a total time, generating a basic intermediate correlation function by performing an elimination operation on sixth and seventh partial correlation functions, acquiring first to fifth and eighth to twelfth additional intermediate correlation functions by performing an elimination operation on each of partial correlation functions, excluding the sixth and seventh partial correlation functions from the first to twelfth partial correlation functions, and a basic intermediate correlation function, and acquiring the main correlation function by simply summing the basic intermediate correlation function and the first to fifth and eighth to twelfth additional intermediate correlation functions. | 05-21-2015 |
20150301188 | VECTOR TRACKING LOOP OPERABILITY THROUGH OSCILLATOR MICRO-JUMP EVENT - A navigation system comprises a GNSS receiver that receives GNSS signals on multiple tracking channels, an INS that generates inertial data, and a processor. A micro jump detection and correction module comprises an oscillator micro jump detector that monitors estimates of C/N | 10-22-2015 |
20160061959 | POSITIONING METHOD FOR A POSITIONING DEVICE OF A SATELLITE POSITIONING SYSTEM AND POSITIONING DEVICE - A positioning device and a positioning method are provided for a satellite positioning system. The positioning device for the satellite positioning system includes: a Radio Frequency (RF) signal processor configured to perform processing on received RF signals transmitted by satellites, to obtain corresponding Intermediate Frequency (IF) signals and feed the IF signals to a capturer; a capturer configured to perform baseband processing on the received IF signals to capture parameters for tracking the satellites, and feed the parameters to a tracker and a sharer; a tracker configured to perform satellite tracking by utilizing the captured parameters for tracking the satellites; and a sharer configured to share the parameters for tracking the satellites with another positioning device. | 03-03-2016 |
20160116599 | RECEIVER AND METHOD FOR DIRECT SEQUENCE SPREAD SPECTRUM SIGNALS - 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. | 04-28-2016 |
20170234987 | METHOD AND APPARATUS FOR JOINT DATA-PILOT TRACKING OF NAVIGATION SIGNAL | 08-17-2017 |