Entries |
Document | Title | Date |
20100283680 | SYSTEM AND METHOD FOR DYNAMIC VOLTAGE SCALING IN A GPS RECEIVER - Systems and methods are disclosed herein to dynamically vary supply voltages and clock frequencies, also known as dynamic voltage scaling (DVS), in GPS receivers to minimize receiver power consumption while meeting performance requirements. For the baseband circuitry performing satellite acquisition and tracking, supply voltages and clock frequencies to the baseband circuitry are dynamically adjusted as a function of signal processing requirements and operating conditions for reducing baseband power consumption. Similarly, the supply voltage and clock frequency to the processor running navigation software and event processing are dynamically adjusted as a function of navigation performance requirements and event occurrences to reduce processor power consumption. | 11-11-2010 |
20110001666 | CARRIER PHASE PROCESSING IN DISCONTINUOUS SATELLITE POSITIONING SYSTEM TRACKING - Disclosed is an apparatus, system and method for location determination following a search discontinuity utilizing early sampling of a satellite positioning system signal to determine a common code phase offset, pseudorange rate and mode of location calculation. | 01-06-2011 |
20110037650 | METHOD AND APPARATUS FOR REDUCING POWER CONSUMPTION IN GNSS RECEIVERS - Systems and methods are disclosed herein to use what is referred to as adaptive continuous tracking (ACT) to reduce the power consumption of GNSS receivers. In GNSS receivers, performance as measured by position accuracy is a function of the observation time of the satellites. A longer observation time translates into more reliable range measurements and demodulated data, and ultimately into better positioning accuracy of the receivers. However, a longer observation time also means more power consumption. ACT allows satellite observation time to be tuned to the desired positioning performance by dynamically adjusting the on time period of the receivers while maintaining a minimum performance metric. The performance metric may be formed from a combination of the estimated position error, the horizontal dilution of precision (HDOP), the data collection state, and the receiver operating environment as characterized by the carrier to noise ratio (CN0). ACT cyclically switches on/off the radio frequency (RF) front-end and also cyclically enables/disables the baseband hardware of the receivers to reduce power consumption while allowing the receivers to meet the minimum performance metric and ensuring continuous satellite tracking, continuous positioning fix operation, multiplexed GNSS operation, and continuous data collection. | 02-17-2011 |
20110080321 | Signal processing techniques for improving the sensitivity of GPS receivers - The use of multiple GPS sensors provides the conceptual framework for novel techniques for reducing the minimum signal strength required by a GPS assistance system to acquire and accurately track GPS satellites at or near the horizon. A strong signal attenuation system for synthesizing GPS satellite-specific I/F signals, enabling more efficient and effective acquisition of GPS satellites, is disclosed, comprising N+1 reference GPS sensors, each with an omni-directional antenna and front end, for down converting composite GPS satellite signals, and strong signal suppression (SSS) means for synthesizing, from the I/F signals produced by the N+1 reference GPS sensors, a set of one or more I/F signals (corresponding to a set of designated satellites), each with at least N of the strongest potentially-interfering satellite signals suppressed. | 04-07-2011 |
20110169694 | POSITIONING DEVICE, ELECTRONIC INSTRUMENT, AND STORAGE MEDIUM STORING PROGRAM - A slice set for a specific period of time is acquired from a storage area of a memory which is a ring buffer while changing the read position, and the signal strength total value of each slice set is calculated. The signal strengths of the slices included in the maximum strength slice set and the signal strengths of the slices preceding or subsequent to the maximum strength slice set are calculated, and the final signal read position is determined based on a read offset of the maximum strength slice. A GPS satellite signal is acquired and tracked based on the slice read from the determined signal read position, and a specific positioning process is performed. | 07-14-2011 |
20110298662 | SYSTEM AND/OR METHOD FOR ACQUISITION OF GNSS SIGNALS - The subject matter disclosed herein relates to a system and method for acquiring signal received from space vehicles (SVs) in a satellite navigation system. In one example, although claimed subject matter is not so limited, information processed in acquiring a signal from a first SV may be used in acquiring a signal from a second SV. | 12-08-2011 |
20110316740 | Reacquiring Satellite Signals Quickly - Embodiments of the invention provide a method of reacquiring satellite signals quickly. A pseudorange of at least one satellite is estimated. A user's position is also estimated. Then a signal from at one or more satellites may be received. By detecting when the user is stationary, the Doppler frequency estimation can be corrected or the SNR can be boosted more both of which lead to improved performance. The embodiments allow a GNSS receiver to process signals in when the signal level would otherwise be too low—for example indoors. The embodiments can improve performance when one or more satellites are temporarily blocked but one or more satellites are still being tracked. | 12-29-2011 |
20120001798 | METHOD AND SYSTEM FOR INTER-DELAY PRODUCT TEST FOR SIGNAL DEGRADATION DETECTION IN A GNSS RECEIVER - A GNSS enabled communication device receives GNSS signals from GNSS satellites. The resulting GNSS baseband signals may be concurrently correlated with GNSS acquisition codes. Inter-delay products for the received GNSS signals may be generated utilizing the correlation IQ samples. The inter-delay products are utilized to calculate either an open loop or a close-loop estimate for inter-delay phase coherence of the received GNSS signals. A test statistic, generated from the inter-delay products, may be compared with a preset or dynamically determined threshold value in order to detect or declare signal degradation effects in the received GNSS signals. The early and late delays for the inter-delay phase coherence may be generalized to two or more delays. In this regard, the correlation IQ samples may be utilized to generate a correlation matrix. Variations derived from the correlation matrix may be utilized to declare or detect signal degradation effects in the received GNSS signals. | 01-05-2012 |
20120032845 | METHOD AND DEVICE TO DETERMINE OUT OF COVERAGE FOR MOBILE DEVICES - A method and a mobile device configured to obtain position information from a position broadcast system, the position broadcast system comprising a plurality of transmitters that each broadcast a respective signal containing position information for the respective transmitter. The method comprising: measuring signal strengths of signals from a plurality of the transmitters of the position broadcast system; and determining that the mobile device is out of range of the position broadcast system if the measured signals strengths satisfy at least one out of range criterion. | 02-09-2012 |
20120075143 | SATELLITE RADIOWAVE RECEIVER AND SATELLITE RADIOWAVE RECEIVING METHOD - Disclosed is a satellite radiowave receiver which obtains a satellite signal transmitted from a positioning satellite including a receiving unit which receives a radiowave in a frequency range which is set in advance, the frequency range including a frequency transmitted by the positioning satellite transmit, a capture unit which detects the satellite signal from a received signal based on the radiowave received by the receiving unit and a calculation unit which calculates a mean frequency of a plurality of the satellite signals which are detected, based on receiving frequencies of the plurality of the satellite signal detected by the capture unit, and the capture unit detects the satellite signal according to the mean frequency. | 03-29-2012 |
20120086600 | Chip cards providing trusted time references - The subject innovation relates to a chip card to be inserted in terminals. An exemplary embodiment of the chip card includes a clock unit to provide a time reference and an internal power source to at least run the clock unit in case of absence of an external power source. The exemplary chip card also includes a signal receiver to receive a satellite navigation signal comprising a satellite time signal, the signal receiver being connected to the clock unit in order to synchronize the clock unit with the satellite time signal to enable the clock unit to provide the time reference as a trusted absolute time reference independently from a position of the chip card. | 04-12-2012 |
20120169537 | METHOD AND APPARATUS FOR DETECTING POSITIONING SYSTEM ANTENNA CONNECTION CHANGE - Through use of the method and circuits disclosed herein, connection and disconnection of positioning system antenna to a positioning system enabled mobile device is automatically detected. Upon detection of a connection or disconnection of the active positioning antenna, a low noise amplifier is disabled (or enabled) and the gain of the receive chain is readjusted. | 07-05-2012 |
20120182183 | DIFFERENTIALLY COHERENT STROBE CORRELATOR - A GPS receiver for tracking a GPS signal. The receiver generates a mixed GPS signal by mixing the GPS signal with an oscillator signal, generates a first correlation signal by correlating the mixed GPS signal with a reference signal, and generates a filtered GPS signal from the GPS signal. The receiver also generates a filtered reference signal from the reference signal, generates a second correlation signal by correlating the filtered GPS signal with the filtered reference signal, and a generates a combined correlation signal by combining the first correlation signal with the second correlation signal. The receiver tracks the GPS signal by adjusting the phase of the oscillator signal based on the combined correlation signal. | 07-19-2012 |
20120188123 | Satellite Signal Receiving Device, Method of Controlling Satellite Signal Receiving Device, and Electronic Device - A solar cell, a charge state detection circuit and a voltage detection circuit as a generating state detection circuit that detects the generating state of the solar cell, and a control circuit are provided. The control circuit operates a GPS receiver circuit when a detection value detected by the voltage detection circuit is greater than or equal to a preset threshold value, and resets the threshold value if satellite signal reception by the GPS receiver circuit fails, or if the detection value detected by the voltage detection circuit remains less than the threshold value for a preset generating state detection time or longer. | 07-26-2012 |
20120218146 | Dynamic Sleep Time Calculation for GNSS Receiver - A GNSS receiver includes a sensing element for detecting an environmental condition, a control unit for dynamically calculating a sleep time duration in response to the environmental condition, and a digital processing unit that operates in a first mode or in a second mode based on the calculated sleep time duration and the environmental condition. The environmental condition may include a receiver signal strength indicator, a receiver velocity, the stability and precision of a local reference clock, a recent almanac, an ephemeris data, and the like. The first operation mode may include a tracking of satellite signals, and the second operation mode may include an acquisition operation, a tracking operation, or a combination of acquisition and tracking operations of satellite signals. | 08-30-2012 |
20120218147 | Precise Absolute Time Transfer From A Satellite System - Various techniques are provided for obtaining a precise absolute time using a satellite system. In one example, a method of transferring precise absolute time from a satellite to a device includes receiving data from a messaging channel, wherein the data has a frame structure. The method also includes using the data to identify the satellite and a position of the satellite, correcting for signal time of flight using the satellite identity and the position, and using the data as a time reference to align a receiver clock to the frame structure. The method also includes, with the receiver clock aligned to the frame structure, receiving a precision time signal from the satellite, wherein the precision time signal comprises a periodic repeating code. The method also includes determining a timing phase of the code and using the timing phase to determine a precise absolute time. | 08-30-2012 |
20120223859 | High Sensitivity GLONASS/GPS Automatic Frequency Control - Updates to an AFC loop can be performed to provide high-sensitivity tracking. A 20 ms update interval and PDI=10 ms is used for every other update. A setting is used for each update between the 20 ms updates. Notably, the setting uses PDI=5 ms. The setting can include first, second, and third cross-dot pairs associated with a first bit, a second bit, and a cross-bit boundary between the first and second bits, respectively. A sum of these pairs can be scaled down when the signal strength is below a predetermined threshold. In another embodiment, the setting can include a first cross-dot pair associated with a first bit and a second cross-dot pair associated with a second bit. A sum of these pairs can also be scaled down when signal strength is below a predetermined threshold. | 09-06-2012 |
20120223860 | Use of Motion or Accelerometer Sensors in Low Power Positioning System - A power-saving GNSS includes a sensor for detecting a motion of the receiver, an RF front-end for receiving satellite signals, and a central processing unit coupled to the front-end for acquiring a set of the received satellite signals if the motion is detected. The receiver further include a signal strength evaluator for evaluating a signal strength of the acquired set of the received signals and a counter to count a time period for which the signal strength is below a predetermined value. The receiver also includes a control unit for setting the receiver into an intermittent operating mode if the signal strength exceeds the predetermined value sets the receiver into a power-saving mode if the signal strength is below the predetermined value for the time period determined by the counter. The receiver may also be set into the power-saving mode if it remains stationary for a given time interval. | 09-06-2012 |
20130088388 | SATELLITE RADIOWAVE RECEIVING DEVICE - A satellite radiowave receiving device includes: a receiving unit which receives a radiowave signal; a conversion unit which converts the radiowave signal into digital data; a detection/arithmetic operation unit which detects the satellite signal; a capturing unit which searches a reception frequency; a setting unit which sets a second bit number, and the number of parallel processing in which the predetermined arithmetic operation can be executed in parallel; and a specifying unit which specifies the reception frequency of the satellite signal, and the detection/arithmetic operation unit executes the predetermined arithmetic operation in parallel for the input signal data related to reception frequencies of which number is equal to or less than a predetermined number of maximum parallel processing, and the number of parallel processing is determined so that a total bit number is equal to or less than the maximum bit number/the number of maximum processing. | 04-11-2013 |
20130120189 | DIFFERENTIALLY COHERENT STROBE CORRELATOR - A GPS receiver for tracking a GPS signal. The receiver generates a mixed GPS signal by mixing the GPS signal with an oscillator signal, generates a first correlation signal by correlating the mixed GPS signal with a reference signal, and generates a filtered GPS signal from the GPS signal. The receiver also generates a filtered reference signal from the reference signal, generates a second correlation signal by correlating the filtered GPS signal with the filtered reference signal, and a generates a combined correlation signal by combining the first correlation signal with the second correlation signal. The receiver tracks the GPS signal by adjusting the phase of the oscillator signal based on the combined correlation signal. | 05-16-2013 |
20130127664 | SPS Authentication - Method and apparatus for SPS authentication, for example for use with GPS, are disclosed. The method may include receiving a first set of Y codes from a plurality of satellites, generating authentication decisions using W code estimates extracted from the first set of Y codes for satellite channels corresponding to the plurality of satellites, and generating an authentication response according to authentication decisions generated for the satellite channels. | 05-23-2013 |
20130141279 | POSITIONING SATELLITE SIGNAL RECEIVER, POSITIONING SATELLITE SIGNAL RECEIVING METHOD, AND COMPUTER READABLE STORAGE MEDIUM - A positioning signal receiver is disclosed. The receiver stores a correction table indicating a correspondence between a predetermined temperature and a drift amount of a frequency of a reference signal outputted from an oscillator unmounted in the receiver when the oscillator unmounted in the receiver has the predetermined temperature. The receiver further stores a specified frequency that is the frequency of the reference signal outputted from the oscillator incorporated into the receiver and having a specified temperature. The receiver estimates a drift amount of the frequency of the reference signal outputted from the oscillator incorporated into the receiver, based on a temperature data detected with a temperature sensor, the stored correction table and the stored specified frequency. | 06-06-2013 |
20130207840 | SYSTEM AND METHOD FOR ESTIMATING INDOOR LOCATION USING SATELLITE SIGNAL GENERATION DEVICE - A system for estimating an indoor location of using a satellite signal generation device, including a reception antenna for receiving satellite signals; a central control device for calculating and renewing real-time satellite information of all existing satellites, for extracting and synchronizing satellite time from the satellite signal received from the reception antenna, and selecting at least four satellite numbers that can be used for estimating the location from the all existing satellites, based on the satellite time information; and at least one satellite signal generation device for being allocated the satellite number from the central control device and generating the satellite signal corresponding to the allocated satellite number, wherein an environment is provided for a user of an indoors satellite signal receiving terminal to estimate the location of oneself, based on the satellite signal that corresponds to the at least four satellite numbers, transmitted from the satellite signal generation device. | 08-15-2013 |
20130222181 | 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. | 08-29-2013 |
20130229305 | SYSTEMS AND METHODS FOR DETECTING SATELLITE SIGNALS - A GNSS receiver configured to detect a presence of at least one GNSS satellite signal in a received signal is provided. The GNSS receiver includes a buffer loaded with sample sets corresponding to the received signal and a Doppler derotation block configured to perform a Doppler derotation corresponding to at least one Doppler frequency on a sample set received from the buffer. The GNSS receiver further includes an accumulator block configured to perform a coherent accumulation of a plurality of sample sets upon or subsequent to the Doppler derotation corresponding to a Doppler frequency, and, a first memory configured to store the results of the coherent accumulation. A register array is configured to be loaded with the results stored in the first memory and a correlator engine is configured to generate correlation results by correlating the results in the register array with a plurality of code phases of GNSS satellites. | 09-05-2013 |
20130257651 | NAVIGATION BIT BOUNDARY DETERMINATION APPARATUS AND A METHOD THEREFOR - A navigation bit boundary determination apparatus and a method therefor. In one example, the navigation bit boundary determination apparatus includes a satellite signal receiving module, a position receiving and clock calibration module, a detection module, a first calculation module, a second calculation module, and a determination module. The satellite signal receiving module is configured to receive a satellite signal from a satellite and record a local receiving time of the satellite signal. The position receiving and clock calibration module is configured to receive a time signal and a position of the navigation bit boundary determination apparatus. The detection module is configured to detect if ephemeris information of the satellite is available. The first calculation module is configured to calculate a coordinate of the satellite. The second calculation module is configured to calculate a transmitting time for the satellite signal. The determination module is configured to determine a navigation bit boundary of the satellite signal. | 10-03-2013 |
20130257652 | APPARATUS AND METHOD - Apparatus comprises: a first correlator configured to correlate a first signal component with a first code to provide a first output, said first signal component having a carrier frequency and data; a second correlator configured to correlate a second signal component with a second code to provide a second output, said second signal component having the same carrier frequency as the first signal component and the same data as the first signal component, said data on the second signal component being delayed with respect to the data on the first signal component; and a processor configured to process the first and second outputs, said data on said first output being aligned with the second output to provide frequency information about said carrier. | 10-03-2013 |
20140028498 | UTC Time Offset Estimation at a GNSS Receiver - 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. | 01-30-2014 |
20140062779 | FAST TRANSFORM BASED OFFSET DETERMINATION - An offset estimator (e.g., a time delay, a spatial image offset, etc.) makes use of a transform approach (e.g., using Fast Fourier Transforms). The sparse nature of a cross-correlation is exploited by limiting the computation required in either or both of the forward and inverse transforms. For example, only a subset of the transform values (e.g., a regular subsampling of the values) is used. In some examples, an inverse transform yields a time aliased version of the cross-correlation. Further processing then identifies the most likely offset of the original signals by considering offsets that are consistent with the aliased output. | 03-06-2014 |
20140062780 | Method and Apparatus for Synchronizing Navigation Data - Method, apparatus, and programs for synchronizing navigation data. First synchronization information is obtained from a receiver. The first synchronization information was used for synchronizing first navigation data received by the receiver from a navigation device. A sending time of second navigation data sent from the navigation device is then determined based on the first synchronization information. Second synchronization information is computed based on the sending time of the navigation data. The second synchronization information is used for synchronizing the second navigation data. | 03-06-2014 |
20140070991 | ESTIMATING AND PREDICTING STRUCTURES PROXIMATE TO A MOBILE DEVICE - The description relates to mobile device location. One example can identify global navigation satellite system (GNSS) satellites expected to be in line-of-sight of a mobile device. This example can detect differences between received GNSS data signals and expected GNSS data signals from the expected GNSS satellites. The example can also determine a direction from the mobile device of an obstruction that is causing at least some of the detected differences. | 03-13-2014 |
20140159953 | SYSTEM AND METHODS FOR REDUCING GNSS RECEIVER POWER USAGE BY LEVERAGING SIGNALS OF OPPORTUNITY TO PREDICT GNSS AVAILABILITY - 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. The tracking of the GNSS signal is reconfigured at the portable electronic device, if the expected GNSS signal-strength-change indicates the expected GNSS signal attenuation is greater than the signal attenuation threshold. | 06-12-2014 |
20140218235 | INTERMITTENT TRACKING FOR GNSS - A GNSS system operates intermittently and has adaptive activity and sleep time in order to reduce power consumption. The GNSS system provides an enhanced estimate of its position in the absence of GNSS signals of sufficient strength. The user's activity and behavior is modeled and used to improve performance, response time, and power consumption of the GNSS system. The user model is based, in part, on the received GNSS signals, a history of the user's positions, velocity, time, and inputs from other sensors disposed in the GNSS system, as well as data related to the network. During each activity time, the GNSS receiver performs either tracking, or acquisition followed by tracking The GNSS receiver supports both normal acquisition as well as low-power acquisition. | 08-07-2014 |
20140266883 | ENERGY CONSERVATION APPARATUS FOR GEOFENCE APPLICATIONS - Methods, systems and devices are provided for operating a GPS engine in an active geofence monitoring state for no more than a first QoS period to obtain a first GPS fix. The GPS engine may also be set to operate in the active geofence monitoring state for no more than a second lower QoS period to obtain a second GPS fix in response to determining the first GPS fix was not obtained. The method may determine whether a geofence breach is detected in response to determining the GPS engine obtained the first GPS fix. The GPS engine may be set to operate in the active geofence monitoring state for no more than the second QoS period to obtain the second GPS fix in response to determining the geofence breach is not detected. The GPS engine may thus operate in the active geofence monitoring state to obtain the second GPS fix. | 09-18-2014 |
20140266884 | SYSTEMS AND METHODS FOR MAINTAINING TIME SYNCHRONIZATION - Described are systems and methods for time synching to a network in an environment that contains obstructions disposed between a receiver component and a transmitting device of the network. In particular, an adaptive masking approach and an outage approach may be used to maintain time synchronization to the network. The adaptive masking approach may be used to track satellites above predefined elevation angles that correspond to the obstructions. The outage approach may be used to maintain time synchronization when the transmitting device of the network is not in view of the receiver component. | 09-18-2014 |
20140266885 | SYSTEMS AND METHODS FOR MAINTAINING TIME SYNCHRONIZATION - Described are systems and methods for time synching. | 09-18-2014 |
20140313078 | Time to First Fix, TTFF, Sensitivity and Accuracy For a Global Navigation Satellite System Positioning Device - 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 ( | 10-23-2014 |
20140327575 | Navigation Data Configuration For Optimal Time To First Fix - 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. | 11-06-2014 |
20140347218 | APPARATUS AND METHODS FOR DETERMINING STATUS OF A TRACKING LOOP - 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. | 11-27-2014 |
20140347219 | RECEIVERS AND METHODS FOR MULTI-MODE NAVIGATION - 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. | 11-27-2014 |
20150015438 | METHOD TO IMPROVE SATELLITE SIGNAL DETECTION - 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. | 01-15-2015 |
20150015439 | Common Coordinate-Quartz Loop for Reducing the Impact of Shock and Vibration on Global Navigation Satellite System Measurements - A navigation receiver operably coupled to an antenna can determine location by receiving and processing radiofrequency navigation signals from global navigation satellites. | 01-15-2015 |
20150022397 | LOW POWER ASYNCHRONOUS GPS BASEBAND PROCESSOR - 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. | 01-22-2015 |
20150091752 | SATELLITE SIGNAL SEARCHING METHOD - 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. | 04-02-2015 |
20150097727 | LOW COST CABLELESS GROUND STATION ANTENNA FOR MEDIUM EARTH ORBIT SATELLITE COMMUNICATION SYSTEMS - 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. | 04-09-2015 |
20150097728 | CONTROL AND FEATURES FOR SATELLLITE POSITIONING SYSTEM RECEIVERS - 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. | 04-09-2015 |
20150301186 | Method For Improving the Tracking of a Data Transmission Signal of a Satellite Navigation System - A method for improving tracking of a data transmission signal emitted to a receiver of a satellite navigation system in addition to navigation signals emitted by satellites to a satellite positioning receiver, comprises: transmission to the receiver, during a improvement period, and by an improvement signal emitted in coherence with said data transmission signal, of data Ni or other data Nai to predict said data, said data transmitted to the receiver by the data transmission signal during a transmission period starting after the improvement period, reception, by the receiver, of said data Ni or other data Nai which are transmitted by the improvement signal, generating the symbols serving to modulate the data transmission signal during said transmission period by said data Ni received or other data Nai received, tracking the data transmission signal while removing the effect of the modulation of said data transmission signal by the symbols generated. | 10-22-2015 |
20150338521 | METHOD AND SYSTEM FOR PROCESSING POSITIONING SIGNALS BASED ON PREDETERMINED MESSAGE DATA SEGMENT - A method and system for determining a geolocation of an object includes collecting a positioning signal including a predetermined message data segment. A time of arrival of the predetermined message data segment may be determined in the positioning signal. Information based on the time of arrival may be provided for determination of a geolocation of an object. The time of arrival of the predetermined message data segment may be determined based on a time search for the predetermined message data segment in the positioning signal. | 11-26-2015 |
20150346347 | GNSS RECEIVER AND METHOD FOR DETERMINING WHETHER TO SWITCH FROM ONE OPERATION STATE TO ANOTHER OPERATION STATE ACCORDING TO STATE SWITCHING CRITERION AND POSITIONING INFORMATION - A method for controlling a GNSS receiver includes: providing a state switching criterion; obtaining at least one positioning information; determining whether to switch from a first operation state to a second operation state according to the obtained positioning information and the state switching criterion, a power consumption of GNSS receiver operating under the first operation state and the second operation state is different; the obtained positioning information includes at least one of a speed value of GNSS receiver, a satellite distribution value of GNSS receiver, a satellite signal strength value of GNSS receiver, a location identification of GNSS receiver, instant motion information from a motion sensor, or location information from a WLAN device, a Bluetooth device or a UV light sensor. | 12-03-2015 |
20150378026 | POSITIONING APPARATUS, POSITIONING METHOD, AND RECORDING MEDIUM - Provided is a positioning apparatus for determining positions including: a distance acquisition unit configured to acquire pseudo-range information pieces indicating pseudo-ranges from the positioning apparatus to three positioning satellites; an altitude acquisition unit configured to acquire the altitude of the position of the positioning apparatus based on map information; a setting unit configured to set the altitude acquired by the altitude acquisition unit as a tentative altitude at the position of the positioning apparatus; and a positioning unit configured to perform a positioning process in a two-dimensional positioning method based on the pseudo-range information acquired by the distance acquisition unit, and the tentative altitude. | 12-31-2015 |
20150378027 | POSITIONING SYSTEM, POSITIONING APPARATUS, STORAGE APPARATUS, AND POSITIONING METHOD - Provided is a positioning system including: a storage apparatus configured to store orbit information indicating the position of a positioning satellite; and a positioning apparatus configured to perform a positioning process based on the orbit information, wherein the positioning apparatus includes an acquisition unit configured to acquire state-related information related to the state of the positioning apparatus, and a transmission unit configured to transmit, to the storage apparatus, the state-related information acquired by the acquisition unit, and the storage apparatus includes a receiving unit configured to receive the state-related information transmitted from the transmission unit, and an adjustment unit configured to adjust the content of the orbit information to be transmitted to the positioning apparatus, based on the state-related information received by the receiving unit. | 12-31-2015 |
20160011316 | POSITIONING SIGNAL RECEIVING METHOD AND POSITIONING SIGNAL RECEIVING DEVICE | 01-14-2016 |
20160018529 | ALL BAND GNSS RECEIVER - One embodiment of the present invention provides a signal-recording system. During operation, the system receives a plurality of radio frequency (RF) signals, separates the RF signals to obtain a first group of RF signals in a first RF band and a second group of RF signals in a second RF band, and simultaneously down-converts the first group of RF signals to a first group of low intermediate-frequency (low-IF) signals in a first IF band and the second group of RF signals to a second group of low-IF signals in a second IF band. The system further converts the first group of low-IF signals and the second group of low-IF signals to the digital domain, and simultaneously processes all of the converted low-IF signals. | 01-21-2016 |
20160091611 | METHOD AND INTEGRITY VERIFICATION DEVICE LOCATION INFORMATION OBTAINED BY AT LEAST TWO SATELLITE GEOLOCATION DEVICES - The invention relates to a method and a device for verifying the integrity of position vector information obtained by at least two satellite geolocation devices, each of the geolocation devices being able to receive a plurality of wireless signals from a plurality of separate satellites, and to use the received wireless signals to compute a position vector of said geolocation device, including position coordinates computed in a predetermined spatial reference at a given moment in time, each of the geolocation devices being independent of the other geolocation devices, the satellites used being able to be different from one geolocation device to the next. The method includes, for at least one considered pair of geolocation devices made up of a first geolocation device (G | 03-31-2016 |
20160377695 | Bearing Calculation - There is provided an apparatus comprising a location receiver to receive a signal indicative of a location of the location receiver. A movement mechanism rotates the location receiver about an axis and provides an angle of the location receiver about the axis from a known point. Calculation circuitry produces an output value indicative of an absolute bearing of the known point about the axis, based on a plurality of given angles of the location receiver about the axis from the known point, and a plurality of associated locations of the location receiver indicated by the signal received when the location receiver is at each of the given angles. | 12-29-2016 |