Abstract: A method for determining a position of a unit by satellite navigation, wherein the position is determined solely by Doppler measurements. Further, an associated control module and an associated data storage medium are disclosed.

Abstract: A multi sensor detection and disabling lock system includes detector cases for holding interchangeable detectors that sample for chemical, biological and radiological compounds, agents and elements, with each detector case disposed in or upon the monitored product. The detector case transmits detection information to a monitoring computer terminal and transmits a signal to a lock disabler engaged to the product to lock or disable the product's lock thereby preventing untrained, unauthorized and unequipped individuals from gaining access and entry to the product, and also preventing further contamination of the area. The detection system can be interconnected to surveillance towers scanning detector cases disposed at seaport docks, freight depots and rail terminals for monitoring containers being prepared for shipment or sitting on docks for long periods of time.

Abstract: Systems and methods are described for management of data transmitted between computing devices in a communication network. An administrative component can configure one or more devices in the communication path of messages to be exchanged by devices to interpret codes embedded in the communication messages. A receiving device can review incoming messages for one or more processing codes or instructions that are embedded in the portion of the communication typically utilized solely to identify the subject matter of the communication, generally referred to as the topic portion of the communication. The receiving devices can then process the embedded codes to determine how the communication message will be routed or otherwise processed.

Abstract: A method of determining a location, using bilateration, of an electronic device that is spaced from transmitting devices is disclosed. The electronic device receives first and second signals of the same or different signal type from first and second transmitting devices, respectively, with an antenna. The electronic device determines a signal quality of each signal based on: 1) a received signal strength indicator (RSSI) or a received signal power and a received signal gain, and 2) signal propagation characteristics specific for the transmitting devices. The signals with the two highest signal qualities are used for location determination. The distance from the transmitting devices can be determined based on one or more of: a received signal power and signal gain for both signals, a transmitted power and signal gain of both signals, or location information associated with the transmitting devices.

Abstract: A method and apparatus is disclosed herein for wireless transceiver calibration. In one embodiment, the method for relative calibration of multiple transceiver units for their use for joint transmission from groups of transceiver units to at least one other wireless entity, wherein each transceiver unit includes an antenna element, comprises: exchanging pilots using multiple signaling resource slots, using at least two non-overlapping groups of transceiver units; and performing calibration of transceiver units in the first and second groups of transceiver units, including choosing relative calibration parameters to control calibration and using a metric to assess calibration, where the metric is based on at least one combination of calibration parameters and the observations of each transceiver group in at least two groups of transceiver units based the simultaneous pilot broadcast and subsequent reception between transceiver units in pairs of groups of transceiver units.

Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for synchronizing playback of audiovisual content with a dumb speaker. In some embodiments, a display device transmits a spread spectrum signal to a dumb speaker over a data channel using a spread spectrum code. The display device then receives the spread spectrum signal from the dumb speaker over an audio data channel. The display device despreads the spread spectrum signal based on the spreading code. The display device determines a time of receipt of the spread spectrum signal. The display device calculates an audiovisual output path delay for the dumb speaker based on the time of receipt and a time of transmission. The display device then synchronizes the playback of the audiovisual content at the dumb speaker and a smart speaker based on the audiovisual output path delay.

Abstract: The invention relates to systems and methods for obtaining phase information and/or localization of tag devices. In particular, the invention relates to a system for the localization of at least one tag device, the system including: the at least one tag device configured to transmit a tag signal which is a frequency-hopping signal; at least one known position device configured to transmit a reference signal; and a localization device configured to localize the at least one tag device based on the phase difference of arrival, PDoA, of the tag signal and the reference signal.

Abstract: Methods and systems are described for determining the shortest RF path in a multi-path environment. In an aspect a signal is transmitted by a transmitter. Multiple copies of the signal are received by a multi-directional receiver based on antenna elements that have a unique antenna pattern for each copy of the signal and where the copies are phase correlated and time synchronized. The copies are deconstructed into components of the reflected and line-of-sight waves of the transmitted signal. The shortest path is selected from among the reflected and line-of-sight waves using the deconstruction.

Abstract: A system includes a host processor and at least one storage device coupled to the host processor. The host processor is configured to execute instructions of an instruction set, the instruction set comprising a first move instruction for moving data identified by at least one operand of the first move instruction into each of multiple distinct storage locations. The host processor, in executing the first move instruction, is configured to store the data in a first one of the storage locations identified by one or more additional operands of the first move instruction, and to store the data in a second one of the storage locations identified based at least in part on the first storage location. The instruction set in some embodiments further comprises a second move instruction for moving the data from the multiple distinct storage locations to another storage location.

Abstract: A construction site status monitoring device is provided including processing circuitry configured to receive construction device location data associated with a construction device, receive worker location data associated with a worker, and determine a safety condition based on the construction device location data and the worker location data.

Abstract: Multivariate position estimation can be performed to provide a position estimate of a moving object. The multivariate position estimation approach can employ multiple types of information including time of arrival (or time difference of arrival), angle of arrival, Doppler, and/or prior location information in an iterative process to calculate a location estimate that is highly accurate. In particular, the multivariate position estimation approach can employ the statistical quality of each of these types of information to quickly arrive at a highly accurate position estimate within a 3D coordinate system. The multivariate position estimation approach can be implemented in environments where a single receiver is available as well as in environments where multiple receivers exist.

Abstract: A shovel includes a lower traveling body that runs, an upper rotating body that is rotatably mounted on the lower traveling body, a plurality of hydraulic actuators that are operated by hydraulic oil discharged by a hydraulic pump driven by an engine, a determining unit that determines a type of work, and a control unit that controls the hydraulic actuators based on the type of work determined by the determining unit.

Abstract: Systems, methods, and apparatus for location determination of an emitter using frequency-of-arrival (FOA) measured from a single moving platform are disclosed. In one or more embodiments, a disclosed system allows for location determination of stationary, pulsed radio frequency (RF) emitters from a moving platform by using coherent frequency of arrival (CFOA) Doppler history measurements. The term “coherent” is used to indicate that the process requires a RF-coherent pulse train, such as that generated by modern radar. In one or more embodiments, the disclosed system employs one of two disclosed CFOA measurement methods (Method 1: CFOA linear regression of phase (LRP), and Method 2: CFOA cross-correlated frequency spectra (CCFS)). The disclosed system also enables geo-discrimination (GeoD) of emitters at known locations, or alternatively geo-location of emitters at unknown locations.

Abstract: An exemplary information-processing system includes: an execution unit configured to execute an application program; a prompting unit configured to prompt a user to post to a service for sharing posted information, in response to a predetermined condition being satisfied a predetermined number of times in the application program executed by the execution unit; and a posting unit configured to post posted information corresponding to the predetermined condition to the service in accordance with a user input with respect to the prompting unit.

Abstract: In one example embodiment, an analysis application implements a technique for measuring a property of interest of an input dataset of location samples. The analysis application may process the input dataset in one or more multi-stage pipelines to produce values that measure a metric for the input dataset. The values that measure the metric for the input dataset may be compared with values that measure the metric for one or more labeled datasets that are generated by the analysis application, for example, using a feedback loop and sampling from a plurality of delta data sets. Each labeled datasets may have different values that measure the metric and corresponding measures of the property of interest. Based on the comparison, the analysis application may determine the measure of the property of interest for the input dataset and such measure may be returned, for example, to a remote device.

Abstract: The present disclosure provides a method implemented in a wireless communication device for determining an Angle of Arrival (AOA) of a wireless signal received at the wireless communication device. The method comprises estimating the AOA of the wireless signal, determining that the estimated AOA is ambiguous and acquiring signal strength measurements for the wireless signal received at two other wireless communication devices, which are located substantively symmetrically about a normal of the wireless communication device's antenna array. The method further comprises disambiguating the estimated AOA based on a comparison of the acquired signal strength measurements. The present disclosure also provides the wireless communication device as well as a Radio Base Station (RBS) comprising the wireless communication device.

Abstract: UE location determined by collecting and preprocessing signal data at a detector and sending extracted data to a remote locate server. The detector buffers samples from signals provided by receive channels, detects known reference signals from receive channels based on reference signal parameters, isolates symbols carrying the reference signal from frames, extracts data from symbols, and sends extracted data to locate server. The locate server receives the extracted data, estimates locate observables based on the extracted data and calculates the UE location based on the estimated locate observables, the reference signal parameters and the extracted data. The detector and/or the server may also generate correlation coefficients between reference signals carrying spectrum received from a serving cell and utilize the correlation coefficients to cancel a serving cell signal in symbols that include known in advance reference signals from the serving cell and one or more neighboring cells of the wireless system.

Abstract: UE location determined by collecting and preprocessing signal data at a detector and sending extracted data to a remote locate server. The detector buffers samples from signals provided by receive channels, detects known reference signals from receive channels based on reference signal parameters, isolates symbols carrying the reference signal from frames, extracts data from symbols, and sends extracted data to locate server. The locate server receives the extracted data, estimates locate observables based on the extracted data and calculates the UE location based on the estimated locate observables, the reference signal parameters and the extracted data. The detector and/or the server may also generate correlation coefficients between reference signals carrying spectrum received from a serving cell and utilize the correlation coefficients to cancel a serving cell signal in symbols that include known in advance reference signals from the serving cell and one or more neighboring cells of the wireless system.

Abstract: A communication system for a vehicle includes a transceiver and a telematics control module. The transceiver receives data from a network device using first antennas disposed external to a vehicle and second antennas disposed internal to the vehicle. The transceiver receives the data using a first antenna combination including two antennas, which include one or more of the first antennas or one or more of the second antennas. The telematics control module: reads channel state information including reference signal received power (RSRP) and rank indicator (RI) values; determines if the RSRP value is greater than a threshold value and the RI value is less than a minimum number of antennas being used to transfer the data; and based on the first RSRP value being greater than the threshold value and the RI value being less than the number of antennas, switches from the first to a second antenna combination.

Abstract: The invention comprises a system of using small, hidden, machine-to-machine (M2M) chips to track automobiles through the radio emissions of the chips, and to use M2M chips as a defense against theft generally, by tracking potentially stolen items through the radio emissions of M2M chips. Users can monitor potential theft of the different parts of an automobile because the chips embedded into the automobile components will be constantly communicating with each other. Spacecraft and other near-earth objects, and drones, can also be tracked by M2M chips, that can be designed in a manner that makes them extremely difficult to find. The M2M chips can be designed in numerous different shapes, and use very little power. Some of the M2M chips are silicon wafer chips with small logic gates.

Abstract: A method in a user equipment for updating a timing of a first cell is provided. The timing is the arrival time of a signal sent from a base station in the first cell relative to a clock in the user equipment in a wireless communication network. The user equipment measures a timing offset for the first cell and respective one or more second cells. When a quality of the timing offset measurement of the first cell is below a first threshold, the user equipment computes a timing offset estimate for the first cell based on the measured timing offset for the respective one or more second cells. The user equipment then updates the timing of the first cell based on the computed timing offset estimate.

Abstract: A network system, such as a transport management system, efficiently allocates resources by monitoring the geospatial and topological locations of a rider responsive to receiving a trip request. A trip management module matches a rider with an available driver based in part on an comparison of the estimated times of arrival of the rider and the driver at the pickup location. A client positioning module monitors the rider's progress through nodes and edges in a topological graph associated with the origin location based on radio signatures received at the rider client device. A client ETA module calculates a rider ETA based on the rider's rate of travel through the origin location represented by nodes in the topological graph. Responsive to determining that the rider ETA and the driver ETA vary by over a threshold amount of time, the trip management module matches the rider with a second available driver.

Abstract: A system and method for using wireless location of mobile communication units for identifying and allocating resources for access by users of such mobile communication units via bringing the user and such a resource together. Such a user may be routed to such a resource even though the resource cannot be reserved for user access. A resource allocation priority between users mitigates a user not being able to access the user's allocated resource, e.g., due to another user accessing the resource. The resources can be, e.g., a parking space, public transportation (e.g., bus, train, taxi), seating at an open admission event, accessing a theme park ride, and the like. By wirelessly locating the user's mobile communication unit, the user may be navigated to such a user allocated resource.

Abstract: A Geo-spatial Enterprise Mapping System (GEMS) application may be utilized for determining a cost associated with providing a service to a point of interest by utilizing data from a web-based mapping service application in conjunction with data from a service provider database. Maps may be utilized with polylines representing fiber and coax spans, and markers to display device, customer, and prospect information to provide a user with a quick overview of a potential profitability of a particular area or point of interest. A proximity of customers and groups of customers to a service provider network may be displayed and visible to a user in an intuitive manner. A serviceability and profitability of potential customers may be determined, as well as locating prospective customers.

Abstract: A split architecture is disclosed for determining the location of a wireless device in a heterogeneous wireless communications environment. A detector within the device or another component of the environment receives signals including parameters for a localization signal of the device. The parameters describe known in advance signals within the signals. Additional metadata including each frame start of the signals and assistance data and auxiliary information are also received. The known in advance signals are detected based on the parameters of the localization signal. Samples extracted from the known in advance signals are then processed and compressed and sent with other collect data to a locate server remote from the detector. The location server uses that information as well as similar information about the environment to calculate the location of the device, as well as perform tracking and navigation of the device, and report such results to the environment.

Abstract: A computer implemented method for determining the location of a target device is disclosed. A locate request is received for the target device. The locate request is forwarded. A locate for the target device in response to the locate request is received, the locate including a location and a location accuracy. The received location accuracy is compared with an accuracy threshold, and a calculated location of the target device is forwarded when the received location accuracy is not within the accuracy threshold.

Abstract: Processing video and sensor data associated with a vehicle Apparatus (5) is configured to: obtain first data corresponding to video data from a video camera (6) associated with a vehicle; obtain second data corresponding to sensor data from one or more sensors (8) associated with the vehicle; form a data structure including metadata and the first and second data, wherein first timing information for the first data is included in the metadata and second timing information for the second data is included in the second data, wherein the first and second timing information enable the first and second data to be temporally related.

Abstract: A vehicle seat haptic system in a vehicle includes a vehicle seat, the vehicle seat including a plurality of actuators configured to generate a haptic output. The vehicle seat haptic system also includes a controller communicatively coupled to the plurality of actuators. The controller is configured to determine an unauthorized entry event has occurred at the vehicle, detect the vehicle is operating, and control said plurality of actuators, in response to determining the unauthorized entry event has occurred, to generate an anti-theft haptic output across the vehicle seat. The anti-theft haptic output has at least one of a magnitude, distribution, and frequency that causes physical discomfort to a user of the vehicle seat.

Abstract: A relative positioning module applies a real-time kinematic (RTK) algorithm to provide relative position vector between reference receiver and rover receiver and to provide recovery data. At the rover, the precise positioning module applies the relative position vector, the aiding data, recovery data, and correction data as inputs, constraints, or both for convergence of one or more predictive filters on wide-lane and narrow-lane ambiguities (e.g., in accordance with a precise positioning algorithm). At the rover, the precise positioning module or the navigation positioning estimator estimates a precise position of the rover based on the converged or fixed narrow-lane ambiguities and wide-lane ambiguities.

Abstract: A system and method for providing security to a network may include monitoring, by a processor, traffic on a first and second network portions of an in-vehicle communication network; determining whether or not a first message detected on the first network portion is anomalous based on at least one of: an attribute of a second message detected on the second network portion and an absence of a second message from the second network portion over a predefined time period; and, if it is determined the first message is anomalous then performing at least one action.

Abstract: The location of a mobile device may be determined based on information that includes the signal strength of nearby radiation sources. The system may disregard information associated with radiation sources that are determined to be mobile.

Abstract: The present disclosure relates to a sensor network, Machine Type Communication (MTC), Machine-to-Machine (M2M) communication, and technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the above technologies, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A device for measuring a distance, according to one embodiment of the present invention, includes a transceiver configured to transmit, to another device, a signal and receive, from the another device, another signal according to the signal, and a controller configured to determine a first interval based on the signal and the another signal and determine a distance between the device and the another device based on the first interval, a second interval regarding the another device, and a delay regarding an internal circuit of the device.

Abstract: A method and system for presenting location information on mobile devices is discussed. The method includes tracking, at a mobile device associated with a user, mobile device locations of additional mobile devices associated with additional users. Each of the mobile device locations can be determined based on data indicating location data transmissions of respective additional mobile devices. The method includes providing an interactive map interface on a device display on the mobile device, the interactive map interface indicating, based on the tracking, location representations of locations and user representations of the additional users. The interactive map interface indicates a geofence generated using a location selected by the user. The method also includes displaying, responsive to a determination based on the tracking that one of the mobile devices has entered an area of the geofence, an alert on the device display.

Abstract: A vehicle location tracking system comprises a plurality of transceivers, a coordinator, and a plurality of identification tags. The plurality of identification tags are coupled to a fleet of vehicles to be tracked. The transceivers measure the strength of a signal emitted by an identification tag coupled to a vehicle and communicate the measured signal strength to the coordinator. The indoor vehicle location tracking system estimates the location of the vehicle based on the measured signal strength.

Abstract: A processing module for a receiver device. The processor module comprises a channel estimate generation component arranged to output channel estimate information for a received signal, and a timestamping module arranged to determine a ToA measurement for a marker within a packet of the received signal based at least partly on the channel estimate information for the received signal generated by the channel estimate generation component. The channel estimate generation component comprises a validation component arranged to derive a validation pattern for the packet within the received signal for which a ToA measurement is to be determined, identify a section of the packet containing a validation sequence, and perform cross-correlation between at least a part of the validation sequence within the packet and at least a part of the generated validation pattern to generate channel estimate validation information.

Abstract: A system and method determines a geographic position of a mobile device in communication with an IP-based wireless telecommunications network. A wireless connection between the mobile device and the IP-based wireless telecommunications network is established when the mobile device registers with a network controller (NC) through an access point (AP). When a geographical position is needed for the mobile device (e.g., a 911 call), messages are exchanged between the NC and the SMLC where the SMLC retrieves information from a database that is used to identify the geographic position of the mobile device. The database can store a variety of information related to mobile devices such as: last known position, IP address, MAC address, device or subscriber identifier, last CGI, etc. The geographical position is communicated back to the NC, which can then forward the position information to a switch for processing such as for 911 calls.

Abstract: A travel smart collision avoidance warning system is provided, comprising a plurality of mobile devices and a positioning device. Each mobile device is provided with an application program downloaded by a corresponding user. The positioning device is coupled to the application so as to store location information of the mobile devices. Each mobile device comprises a processing unit for the corresponding user to pre-set a detection range of the mobile device and an indicating unit. The processing unit is coupled to the positioning device and calculates whether the other mobile devices will be encountered in a pre-set time according to location information, detection range, and traveling speed of the mobile device. If any of the other mobile devices enter a warning range within the pre-set time, the indicating unit is triggered to provide a warning signal so as to make travel much more brilliant and safe.

Abstract: An approach is provided for determining at least one distribution of a plurality of current values for at least one dynamic content parameter associated with a plurality of points of interest within a predetermined proximity to at least one target point of interest. The approach involves determining at least one distribution mean and at least one distribution standard deviation for the at least one distribution of the plurality of current values. The approach also involves determining at least one set of historical values for the at least one dynamic content parameter for the at least one target point of interest. The approach further involves determining at least one estimated current value for the at least one dynamic content parameter associated with the at least one target point of interest based, at least in part, on the at least one set of historical values, the at least one distribution mean, and the at least one distribution standard deviation.

Abstract: A computer-implemented method and a system for providing passenger information performing the tasks of sending, from a passenger electronic device (110), personal data, device geolocation and device time-stamp information; obtaining the passenger itinerary and confirming passenger identity, by a managing unit (206), based upon a match between the personal data, passenger electronic device geolocation and time-stamp; information contained in the obtained passenger itinerary; accessing to updated air traffic information relevant to the passenger upon confirming the passenger identity and sending, by the managing unit (206), a passenger report comprising flight status information for display on the passenger electronic device (110).

Abstract: Determining a signal emitter location involves receiving a signal of interest (SOI) at detection devices, generating a time stamp corresponding to the arrival of the SOI at each detection device, and communicating digital data samples and the time stamp to a time-difference of arrival (TDOA) computer system. The TDOA computer system determines a TDOA of the SOI at the detection devices relative to an arrival time at a first one of the detection devices having an earliest time stamp. It determines a first solution to identify the emitter location in accordance with a first TDOA solution method. It evaluates the reliability of the first solution and selectively uses a second solution if the first solution is insufficiently reliable.

Abstract: A location system is disclosed for commercial wireless telecommunication infrastructures. The system is an end-to-end solution having one or more location centers for outputting requested locations of commercially available handsets or mobile stations (MS) based on, e.g., CDMA, AMPS, NAMPS or TDMA communication standards, for processing both local MS location requests and more global MS location requests via, e.g., Internet communication between a distributed network of location centers. The system uses a plurality of MS locating technologies including those based on: (1) two-way TOA and TDOA; (2) pattern recognition; (3) distributed antenna provisioning; (5) GPS signals, (6) angle of arrival, (7) super resolution enhancements, and (8) supplemental information from various types of very low cost non-infrastructure base stations for communicating via a typical commercial wireless base station infrastructure or a public telephone switching network.

Abstract: Exemplary embodiments include methods and/or procedures for receiving, in a time-multiplexed manner, a plurality of optical signals (e.g., infrared signals) having substantially similar wavelengths. These embodiments can include emitting a first optical signal having a first wavelength and comprising a plurality of intermittent active and inactive durations. These embodiments can also include receiving, during one or more of the active durations, a reflected version of the first optical signal and performing a time-of-flight measurement based on the first optical signal and the reflected version. These embodiments can also include receiving, only during one or more of the inactive durations of the first optical signal, a second optical signal having a second wavelength substantially similar to the first wavelength of the first optical signal.

Abstract: Systems and apparatuses for determining locations of wireless nodes in a network architecture are disclosed herein. In one example, an asynchronous system includes first and second wireless nodes each having a wireless device with one or more processing units and RF circuitry for transmitting and receiving communications in the wireless network architecture. The system also includes a third wireless node having an unknown location and a wireless device with a transmitter and a receiver to enable communications with the first and second wireless nodes in the wireless network architecture.

Abstract: An exemplary method includes a monitoring system identifying a time period during which a vehicle equipped with a tracking device travels at least a threshold distance, determining that the tracking device fails to acquire a desired signal for a predetermined amount of time during the time period, and determining, based on the determining that the tracking device fails to acquire the desired signal for the predetermined amount of time during the time period, that the tracking device is potentially being interfered with during the time period. Corresponding systems and methods are also described.

Abstract: Estimating range bias in a timing-based radio positioning network. Systems and methods estimate range bias, and use the estimated bias to adjust an estimated range measurement for use in estimating a position of a receiver. Estimated range bias may be based on surveyed range errors associated with locations near the position of the receiver, or may alternatively be based on comparisons of different range measurements.

Abstract: A method of an automated motor vehicle for optimized communication from a server of localization reference data for a defined location includes a sensor of the motor vehicle capturing driving environment data, linking the captured driving environment data to location information, based on the linking, localizing the motor vehicle at an achieved localization accuracy, identifying a setpoint localization accuracy at which an operation of the motor vehicle is to be performed, signaling to the server the achieved localization accuracy, and transmitting to the server a request for the localization reference data at the setpoint localization accuracy based on the signaled achieved localization accuracy.

Abstract: In an approach for identifying a location of a mobile device a processor receives a first set of Global Positioning System (GPS) data at a time, wherein the time is specified by the mobile device. A processor synchronizes the time with Coordinated Universal Time (UTC). A processor retrieves offset values, wherein the offset values comprise one or more values to adjust one or more location coordinates based on the synchronized time, and wherein the offset values are determined by comparing a known set of location coordinates to a set of location coordinates calculated using another set of GPS data. A processor calculates location coordinates of the mobile device using the first set of GPS data and the offset values. A processor stores at least the location coordinates of the mobile device and the synchronized time.

Abstract: A method for detecting useful signals in an overall signal. Each useful signal may be affected with a frequency drift. In the detection phase, frequency spectra for detecting the overall signal for multiple detection time windows are calculated and useful signals according to the detection frequency spectra are detected. In the estimation phase, for each useful signal detected: the frequency of the overall signal for multiple frequency drift values is reset. In the estimation phase, for each useful signal detected, a frequency spectrum is calculated for the estimation of the overall signal for each frequency drift value over an estimation time window having the useful signal detected and of a duration higher than the detection time window. In the estimation phase, for each useful signal detected, the frequency drift is estimated affecting the useful signal detected according to the estimation frequency spectra.

Abstract: Method for the directional determination of an earth fault in an electric power distribution network, characterised in that it comprises the steps of: Determining (E2) a residual current phasor and a residual voltage phasor, Determining (E3) an active current, Comparing (E7) the residual voltage phasor module with a threshold (SVR), and as long as the residual voltage phasor module remains higher than the threshold (SVR) or a fraction of the threshold (SVR), and for a predetermined number of iterations: Determining (E9, E12) the integral of the active current and of its sign, Determining the number of times when the residual current phasor module is greater than a predetermined threshold (SIR), during the predetermined number of iterations, If the residual current phasor module is greater than the predetermined threshold (SIR) at least one time, during the predetermined number of iterations, Determining (E16) the location upstream or downstream of the fault according to the number of times when the sign of

Abstract: A method for enhancing GPS location accuracy includes providing a base station receiver having a known surveyed location, and a roving receiver at a location distinct from the base station receiver. The method further includes receiving single-frequency code and carrier-phase measurements from the base station, and translating the single-frequency code and carrier-phase measurements to a Kalman filter-predicted location of the roving receiver. The translated single frequency code and carrier phase measurements are used to generate a local replica of the Kalman filter-predicted location signals for each channel of the roving receiver. The method further includes correlating the local replicas with an incoming signal of the roving receiver to generate a plurality of tracking error estimates. The plurality of tracking error estimates are used to update navigation states and clock update states thereof.