Class / Patent application number | Description | Number of patent applications / Date published |
342357690 | Code related (IPC) | 25 |
20100265134 | POSITION CALCULATING METHOD AND POSITION CALCULATING DEVICE - A position calculating method includes: estimating a reception frequency and a code phase related to reception of a positioning signal from a positioning satellite as an estimated measurement; acquiring a reception frequency and a code phase on the basis of the positioning signal received from the positioning satellite; setting a value of an error parameter as an observed measurement, which is used in position calculation using a Kalman filter, on the basis of a difference between the observed measurement and the estimated measurement; and calculating a position by performing the position calculation using the error parameter value. | 10-21-2010 |
20110006946 | NAVIGATION SYSTEM WITH A SIGNAL PROCESSOR - A signal processor for processing multiple satellite signals is disclosed. The signal processor includes multiple acquisition channels operable for capturing tracking information from a first plurality of satellite signals synchronously according to multiple correlations between multiple reference coarse acquisition (C/A) codes and the first plurality of satellite signals. The signal processor further includes multiple code generators coupled to the acquisition channels and operable for generating the reference C/A codes to the acquisition channels | 01-13-2011 |
20110006947 | System And/Or Method For Reducing Ambiguities In Received SPS Signals - The subject matter disclosed herein relates to systems, apparatuses, and/or methods for resolving ambiguities associated with signals received from space vehicles (SVs) in a satellite navigation system. For example, certain methods include receiving a first SV signal from a first satellite positioning system (SPS), and reducing a bit edge ambiguity of a data signal modulating a second SV signal received from a second SPS based, at least in part, on information in the received first SV signal. | 01-13-2011 |
20110156954 | Position and Velocity Uncertainty Metrics in GNSS Receivers - A GNSS navigation system and navigation method for determining user position, user velocity, and improved uncertainty metrics for position and velocity. A measurement engine in an applications processor of the system determines pseudorange and delta range values over each time period for each received satellite signal, and also determines measurement noise variances for both pseudorange and delta range for the individual signals. The satellite-specific pseudorange and delta range measurement variances are used to determine the position and velocity uncertainties by a position engine, either by way of a least-squares linearization or by way of an enhanced Kalman filter. The uncertainties may be communicated to the system user, or used in generating an integrated position and velocity result from both the GNSS navigation function and an inertial navigation system result. | 06-30-2011 |
20110241937 | APPARATUS AND METHOD FOR SIGNAL ACQUISITION IN GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER - An apparatus for signal acquisition of a Global Navigation Satellite System (GNSS) receiver may downsample digitalized satellite signals based on a code resolution, correlate the downsampled satellite signals and oversampled pseudo-random noise (PRN) codes using a block unit based on a size of a matching filter, and may perform FFT of a value output as a correlation result by employing, as M points, a number of blocks used for the matching filter. Also, the signal acquisition apparatus may estimate a coarse Doppler and a code phase of the satellite signals by comparing a power value, calculated based on the M-point fast Fourier transformed value, with a threshold value, and may estimate a fine Doppler using zero-padding based FFT when the satellite signals are successfully acquired. | 10-06-2011 |
20120169538 | ENHANCING SEARCH CAPACITY OF GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) RECEIVERS - Enhancing search capacity of Global Navigation Satellite System (GNSS) receivers. A method for searching satellite signals in a receiver includes performing a plurality of searches sequentially. The method also includes storing a result from each search of the plurality of searches in a consecutive section of a memory. Further, the method includes detecting free sections in the memory. The method also includes concatenating the free sections in the memory to yield a concatenated free section. Moreover, the method includes allocating the concatenated free section for performing an additional search. | 07-05-2012 |
20120218148 | SATELLITE RADIO RECEIVER - A satellite radio receiver includes: an acquisition unit for setting one reception frequency in turn at a first frequency interval over a first frequency range, allowing a processor to acquire a signal having the reception frequency as digital data having a first bit number, and detecting the satellite signals based on a result of predetermined processes with the digital data; and a specifying unit for, in response to detection of satellite signals by the acquisition unit, concurrently setting predetermined number of reception frequencies in turn at a second frequency interval narrower than the first frequency interval, allowing the processor to acquire the respective signals having the reception frequencies as digital data having a second bit number smaller than the first bit number, and specifying reception frequencies of the satellite signals based on the result of the predetermined processes concurrently executed with the predetermined number of digital data. | 08-30-2012 |
20120268323 | METHODS AND APPARATUSES FOR REQUESTING/PROVIDING CODE PHASE RELATED INFORMATION ASSOCIATED WITH VARIOUS SATELLITE POSITIONING SYSTEMS IN WIRELESS COMMUNICATION NETWORKS - Methods and apparatuses are provided that may be used by one or more devices within in wireless communication network to request and/or provide code phase related information signals associated with various Satellite Positioning Systems (SPSs). | 10-25-2012 |
20120274512 | Signal Processing Method, Device and System - An aspect of the invention is a signal processing method for correlating an N-bit received signal with an N-bit code word signal, wherein the method comprises steps of preprocessing said N-bit received signal and said N-bit code word signal, performing a Fourier transform ( | 11-01-2012 |
20120319899 | DYNAMIC SWITCHING TO BIT-SYNCHRONOUS INTEGRATION TO IMPROVE GPS SIGNAL DETECTION - A method includes determining a bit edge associated with information transmitted through a satellite during a detection operation of a receiver through a processor associated therewith. The method also includes dynamically switching, through the processor, a mode of a signal acquisition of the receiver from a current integration mode of operation of a measurement to a bit-synchronous integration mode of operation of the measurement using a processor when the bit edge is determined. | 12-20-2012 |
20130016010 | APPARATUSES, SYSTEMS AND METHODS FOR DETECTING SATELLITE SIGNALSAANM Nayyar; Jasbir SinghAACI PunjabAACO INAAGP Nayyar; Jasbir Singh Punjab INAANM Tangudu; JawaharlalAACI BangaloreAACO INAAGP Tangudu; Jawaharlal Bangalore INAANM Ramasubramanian; KarthikAACI BangaloreAACO INAAGP Ramasubramanian; Karthik Bangalore IN - A GNSS receiver includes at least one buffer and at least one correlator block. The at least one buffer stores a plurality of samples corresponding to a received signal. The at least one correlator block includes a Doppler derotation block configured to perform Doppler derotation corresponding to at least one Doppler frequency on the plurality of samples, a register array configured to be loaded with the plurality of samples on Doppler derotation corresponding to a Doppler frequency of the at least one Doppler frequency, and a correlator engine configured to generate correlation results by correlating the plurality of samples in the register array with a plurality of code phases for at least one GNSS satellite. A presence of at least one GNSS satellite signal may be detected based on coherent accumulation and a non-coherent accumulation of the correlation results. | 01-17-2013 |
20130069824 | Global Navigation System Signal Tracking and Decoding - Disclosed are various embodiments of global navigation system tracking and decoding. In one embodiment a method includes obtaining a navigation signal including a sequence of navigation strings. Each navigation string includes symbol encoded navigation data symbols and a time mark sequence (TMS). A location of a TMS within the navigation signal is determined and the TMS and the symbol encoding is removed from a subsequent navigation string based upon the determined location of the TMS to provide a stripped navigation signal. In another embodiment, a global navigation receiver includes a RF front end that obtains a navigation signal including a sequence of navigation strings. The global navigation receiver determines a location of a TMS within the navigation signal and removes the TMS and symbol encoding from a subsequent navigation string based upon the determined location of the TMS to provide a stripped navigation signal. | 03-21-2013 |
20130169480 | METHOD OF ACQUIRING CDMA-MODULATED SATELLITE SIGNALS AND RECEIVING APPARATUS IMPLEMENTING THE METHOD - 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. | 07-04-2013 |
20130257653 | System and Method for Fast Code Phase and Carrier Frequency Acquisition in GPS Receiver - A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths. | 10-03-2013 |
20130265194 | Navigation Bit Boundary Determination Apparatus and a Method Therefor - A navigation bit boundary determination apparatus and a method therefor. The navigation bit boundary determination apparatus includes a Beidou satellite signal receiving module, a position receiving and clock calibration module, a calculation module, and a determination module. The Beidou satellite signal receiving module receives a Beidou Geostationary Earth Orbit (GEO) satellite signal, determines and records a local receiving time of the Beidou GEO satellite signal. The position receiving and clock calibration module receives a GPS time signal and a position of the navigation bit boundary determination apparatus. The calculation module calculates a transmitting time for the Beidou GEO satellite signal. The determination module determines a navigation bit boundary of the Beidou GEO satellite signal. | 10-10-2013 |
20140015713 | Reduced Sampling Low Power GPS - Some implementations provide low power reduced sampling of global positioning system (GPS) locations. A server may be configured to assist a mobile device in determining a location from a plurality of GPS signal samples and corresponding time stamps provided by the mobile device, such as by identifying a set of possible reference locations, which may be used to calculate a location of the mobile device. In another example, the mobile device may sample GPS signals using a GPS receiver, compress the samples, and provide the compressed samples to the server for processing. | 01-16-2014 |
20140152500 | SATELLITE POSITIONING METHOD, SATELLITE PESUDORANGE CALCULATION APPARATUS AND SATELLITE PESUDORANGE CALCULATION METHOD - A satellite positioning method, a satellite pesudorange calculation apparatus and a satellite pesudorange calculation method thereof are provided. The satellite pesudorange calculation apparatus is used for calculating a pesudorange between a satellite and a satellite positioning receiving device, wherein the pesudorange includes an integer code value and a decimal code value. The satellite pesudorange calculation apparatus comprises a receiver and a processor electrically connected with the receiver. The receiver is configured to receive a code phase from a satellite signal acquisition unit, and the processor is configured to calculate the decimal code value according to the code phase. The receiver is further configured to define an approximation position and calculate the integer code value according to the approximate position and the decimal code value. The satellite positioning method is used for positioning the satellite positioning receiving device. | 06-05-2014 |
20140232597 | METHOD AND APPARATUS TRACKING GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) SIGNAL, AND GNSS RECEIVER - Provided are a method and apparatus tracking a global navigation satellite system signal. The method includes generating respective replica codes including an E code, P code, L code, first code and second code, calculating correlation values for a received satellite signal and the replica codes, discriminating between gradients of a plurality of slopes derived from correlation points respectively corresponding to the replica codes, and detecting a time delay due to multipath signal components according to a discrimination result. | 08-21-2014 |
20140300514 | METHOD AND APPARATUS FOR ACQUIRING SIGNAL OF GLOBAL NAVIGATION SATELLITE SYSTEM - 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. | 10-09-2014 |
20140340258 | GNSS SIGNAL PROCESSING METHOD, POSITIONING METHOD, GNSS SIGNAL PROCESSING PROGRAM, POSITIONING PROGRAM, GNSS SIGNAL PROCESSING DEVICE, POSITIONING APPARATUS AND MOBILE TERMINAL - A demodulation unit for a GNSS signal processing device includes an operator that uses a first error detecting method when one of a first selection criterion in which an early late differential value is higher than a first threshold (positive value) and an early differential value is lower than a third threshold (negative value), and a second selection criterion in which the early late differential value is lower than a second threshold (negative value) and a late differential value is lower than a fourth threshold (negative value) is satisfied, and the operator uses a second error detecting method when neither criterion is satisfied. A code phase range where an error detection value is not 0 is wide with the first error detecting method, and the code phase range where the error detection value is not 0 is narrow with the second error detecting method. | 11-20-2014 |
20140347221 | GNSS SIGNAL PROCESSING METHOD, POSITIONING METHOD, GNSS SIGNAL PROCESSING PROGRAM, POSITIONING PROGRAM, GNSS SIGNAL PROCESSING DEVICE, POSITIONING APPARATUS AND MOBILE TERMINAL - A demodulation unit for a GNSS signal processing device includes an operator that selects an error detecting method based on signs of early and late differential values and calculates an error detection value. A code phase range where an error detection value is not 0 is wide with a first error detecting method, and is narrow with a second. Immediately after capturing a GNSS signal, a code phase difference between the GNSS signal and a prompt replica signal is large, and signs of the early differential value and the late differential value are different from each other. In this case, the first method is used. As the code phase is driven, the code phase difference between the GNSS signal and the prompt replica signal becomes smaller, and the signs of the early differential value and the late differential value become the same. In this case, the second method is used. | 11-27-2014 |
20150061934 | CLOUD-OFFLOADED GLOBAL SATELLITE POSITIONING - Some implementations provide low power reduced sampling of global positioning system (GPS) locations. A server may be configured to assist a mobile device in determining a location from a plurality of small GPS signal chunks and corresponding time stamps. For instance, the server may identify a set of satellites from each of the GPS signal chunks and by comparing the set of satellites for each of the GPS signal chunks to each other to determine a second set of satellites. The server may then estimate a location of the mobile based on the second set of satellites. | 03-05-2015 |
20150091754 | UNAMBIGUOUS CODE TRACKING SYSTEM FOR GLOBAL NAVIGATION SATELLITE SYSTEMS - A method of tracking a code phase includes configuring local correlators with a first de-spreading local function; de-spreading an incoming signal with the first de-spreading local function to generate a first correlation output; determining a range estimate based on the first de-spreading local function; reconfiguring the local correlators with a second de-spreading local function when a delay-locked loop has locked to a correct correlation peak of the first correlation output; de-spreading the incoming signal with the second de-spreading local function to generate a second correlation output; determining a range estimate based on the second de-spreading local function that has a higher resolution than the range estimate based on the first de-spreading local function; and determining if the delay-locked loop has lost a lock to the correct correlation peak of the second correlation output to determine that the local correlators need to be reconfigured with the first de-spreading local function. | 04-02-2015 |
20150097729 | METHOD AND APPARATUS FOR GNSS SIGNAL TRACKING - A GNSS receiver to track low power GNSS satellite signals. The GNSS receiver includes a frequency locked loop (FLL) that measures a current doppler frequency of the satellite signal. A delay locked loop (DLL) measures a current code phase delay of the satellite signal. A current operating point corresponds to the current doppler frequency and the current code phase delay of the satellite signal. A grid monitor receives the satellite signal and the current operating point, and measures a satellite signal strength at a plurality of predefined offset points from the current operating point. The FLL and the DLL are centered at the current operating point. A peak detector is coupled to the grid monitor and processes the satellite signal strengths at the plurality of predefined offset points and re-centers the FLL and the DLL to a predefined offset point with the satellite signal strength above a predefined threshold. | 04-09-2015 |
20150116151 | HIGH-SENSITIVITY GPS DEVICE WITH DIRECTIONAL ANTENNA - The effective use of weak GPS signals that are present in various environments enables an electronic device to pinpoint its location in such environments. The electronic device uses an antenna to perform sequential scanning in multiple directions for global positioning system (GPS) signals. The electronic device further analyzes GPS signals obtained from scanning the multiple directions to determine a number of acquired GPS satellites that provided the GPS signals. The GPS signals include code phases of the acquired GPS satellites. The electronic device then computes a location of the electronic device based on the code phases of the acquired GPS satellites when the number of acquired GPS satellites meets a threshold. | 04-30-2015 |