Abstract: A wrist-worn electronic device comprises a housing, a bezel, a location determining element, a communication element, and four antennas. The housing includes a bottom wall contacting a wearer's wrist and a side wall coupled to the bottom wall. The bezel is formed at least partially from electrically conductive material and positioned along an upper edge of the side wall. Two antennas receive a first global navigation satellite system (GNSS) location signals at a first frequency and a second frequency that are used by the location determining element, each antenna including a radiating element formed by a portion of the circumference of the bezel. Two antennas transmit or receive communication protocol wireless signals at a third frequency and a fourth frequency output by or communicated to the communication element, each antenna including a radiating element formed by a portion of the circumference of the bezel.

Abstract: A wrist-worn electronic device comprises a housing, a bezel, a first frequency band antenna, a second frequency band antenna, and a location determining element. The housing includes a bottom wall contacting a wearer's wrist and a side wall coupled to the bottom wall. The bezel is formed at least partially from electrically conductive material and positioned along an upper edge of the side wall. The first frequency band antenna receives a first global navigation satellite system (GNSS) location signal at a first frequency and includes a radiating element formed by a first portion of a circumference of the bezel. The second frequency band antenna receives a second GNSS location signal at a second frequency and includes a radiating element formed by a second portion of the circumference of the bezel. The location determining element determines a current geolocation of the wrist-worn electronic device based on the first and second GNSS location signals.

Abstract: A multisystem radio-frequency unit of navigational satellite receivers usable for simultaneous reception of any combination of navigation satellite signals from multiple navigation systems. The unit includes four identical independently configurable reception channels, an automatic intermediate frequency filter band calibration system and two heterodyne frequency synthesizers, forming heterodyne signals for quadrature mixers of reception channels and clock signals for a correlator. Each reception channel includes a two-stage automatic gain control system. During operation, a heterodyne frequency synthesizer is capable of generating any heterodyne frequency using any reference frequency, wherein heterodyne frequency, located either symmetrically or asymmetrically between spectra of received global navigation satellite signals.

Abstract: 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.

Abstract: Described herein are systems, devices, and methods for a multi-standard radio switchable multiplexer that is configured to process wireless local area network (WLAN) signals and cellular signals in the same module without the use of cascaded filters. The disclosed systems use intelligent switching to direct cellular frequency bands along targeted paths and to direct WLAN signals along different paths, such as to a dedicated WLAN module for further processing. By removing notch filters coupled to cellular band filters and/or cascaded filters, insertion losses are reduced.

Abstract: Disclosed herein are system, method, and computer program product embodiments for a GNSS interference and spoofing fast detection and mitigation system. A RF signal associated with a PNT device, such as a GNSS receiver, is received. The received RF signal is split into a plurality of sub-data signals. The received RF signal is re-routed by sending each of the plurality of sub-data signals to at least one of a processing module and a switching module. An anomaly associated with a second sub-data signal is detected. The anomaly is detected during a capture period of an adversarial attack on the PNT device, prior to corruption of any associated system depending on outputs from the PNT device. An output of a first sub-data signal of the plurality of sub-data signals is terminated based on the anomaly detected with the second sub-data signal.

Abstract: Described herein are systems, devices, and methods for a multi-standard radio switchable multiplexer that is configured to process wireless local area network (WLAN) signals and cellular signals in the same module. A front end module can be configured to support concurrent operation of WLAN signals and cellular signals using switching networks as described herein. In general, the described systems and methods can be configured to concurrently operate different radio systems (e.g., cellular, BLUETOOTH, WLAN, GPS, etc.) without the use of cascaded filters.

Abstract: A computerized method of improving position measurement of an indoor positioning system (IPS), comprising: gathering a plurality of position samples of a mobile device measured by an indoor wireless device, each of the position samples is indicative of a measured position and a measurement time; receiving a current position sample of the mobile device; for each of the plurality of position samples and the current position sample, determining a time weight, the time weight is higher for samples measured at a later time; for each of the plurality of position samples and the current position sample, determining a signal weight, the signal weight is higher for measured with stronger signal; and estimating a current position of the mobile device by weighting at least some of the position samples with the respective weights.

Abstract: A dual-band GPS receiver and method and apparatus for downconversion of dual-band GPS signals. A dual-band GPS receiver in accordance with the present invention comprises an antenna, a Radio Frequency (RF) section, coupled to the antenna, and a baseband section, coupled to the RF section, wherein the RF section comprises a receiver, the receiver receiving signals from a first GPS frequency band and a second GPS frequency band, a local oscillator having a local oscillator frequency, and a mixer, coupled to the receiver and the local oscillator, for selectively mixing the local oscillator frequency with the first GPS frequency band and a second GPS frequency band, wherein the local oscillator frequency downconverts the first GPS frequency band and the second GPS frequency band into a common downconversion frequency band.

Abstract: Dual-frequency receiver for satellite-based positioning, comprising a main measurement channel and a secondary channel for a calculation for correction of ionospheric propagation robust to differential errors linked to the local reception environment of the signals. Each channel comprises a code generator, a carrier phase generator, integrators, phase and code discriminators, a code phase numerically-controlled oscillator, a carrier phase numerically-controlled oscillator, carrier phase loop matched filtering means, and code phase loop matched filtering means. The receiver further including: means for determining the respective phase errors in the main and secondary channels comprising means of interspectral correlation of the signals of the main and secondary channels already correlated by the local code, after frequency compensation of the relative Doppler shifts of the signals; and respective feedback loops for the code and carrier phase errors in the main and secondary channels.

Abstract: A database provides base station almanac information pertaining to more than one network mode of communication. A wireless device accesses this database through a centralized server or network, or via the base station, base station controller or the like, with which it is currently communicating.

Abstract: To provide an art that can improve a performance of a GNSS receiver. A GNSS receiver 100 includes a receiver 1, a navigation message acquiring unit 3, a navigation message processor 5, and a calculator 6. The receiver 1 receives signals from satellites. The navigation message acquiring unit 3 acquires predetermined information in navigation messages contained in the signals received by the receiver. The navigation message processor 5 outputs either one of the same kind of information in the plural different kinds of navigation messages, which is acquired by the navigation message acquiring unit 3. The calculator 6 performs a calculation based on the information outputted from the navigation message processor 5.

Abstract: The invention relates to a network element comprising a controlling element for forming assistance data relating to two or more signals transmitted by a reference station of at least one navigation system; and a transmitter for transmitting the assistance data via a communications network to a device. The device comprises a positioning receiver for performing positioning on the basis of two or more signals transmitted by a reference station of the at least one satellite navigation system; a receiver for receiving the assistance data from the network element; and an examining element configured to examine the received assistance data to find out information relating to the status of the two or more signals. The information comprises indication on the reference station the signal relates to, and the status indicates the usability of the signal.

Abstract: A database provides base station almanac information pertaining to more than one network mode of communication. A wireless device accesses this database through a centralized server or network, or via the base station, base station controller or the like, with which it is currently communicating.

Abstract: A Global Positioning System (GPS) commercial receiver includes programmable logic that utilizes P-code modulated L1 and L2 GPS signals to derive estimates of in-phase and quadrature-phase components of both L1 and L2 signals, a programmable processor that calculates pseudoranges and pseudo-Doppler phases, and derives navigation solutions. A resulting complex accumulated L2 signal comprises near-ML estimates of desired L2 amplitude and pseudo-Doppler phase.

Abstract: A method of mapping a space using a combination of radar scanning and optical imaging. The method includes steps of providing a measurement vehicle having a radar system and an image acquisition system attached thereto; aligning a field of view of the radar system with a field of view of the image acquisition system; obtaining at least one radar scan of a space using the radar scanning system; obtaining at least one image of the space using the image acquisition system; and combining the at least one radar scan with the at least one image to construct a map of the space.

Abstract: Embodiments provide a satellite navigation receiver. The satellite navigation receiver has a receiver unit and a transmitter or a controller. The receiver unit is configured to receive and process a satellite navigation signal from a satellite navigation system at the certain time, to obtain a received signal, the received signal having a first component in a digital form, wherein the first component in the digital form is encrypted. The transmitter is configured to transmit the first component in the digital form together with an identification of a user of the satellite navigation receiver at the certain time. The controller is configured to store the first component in the digital form on a non-volatile storage medium in association with other data representing an information from a location, at which the satellite navigation receiver was located at the certain time.

Abstract: Methods and systems for using W-code to extend anti-spoof capability to civilian GPS receivers for verifying locations of mobile terminals are disclosed. A system for verifying a reported location of a mobile terminal includes a receiver of the mobile terminal and a verification processor. The receiver processes the radio ranging signals to generate measured quantities related to the W-code to the verification processor. The receiver also provides the reported location of the mobile terminal to the verification processor. The verification processor generates expected quantities related to the W-code based on the reported location of the mobile terminal. The verification processor further compares the measured quantities related to the W-code to the expected quantities related to the W-code to verify the reported location of the mobile terminal.

Abstract: A signal processing system for processing satellite positioning signals is described. The system comprises at least one processor and a signal processor operating under a number of operational modes. The signal processor includes at least one of a signal processing subsystem, a fast Fourier transform (FFT) subsystem, and a memory subsystem that are each dynamically and independently configurable in response to the operational modes. Further, the system includes a controller that couples to control transfer of data among the signal processing subsystem and the FFT subsystem via the memory subsystem. Configurability of the memory subsystem includes configuring the memory subsystem into regions according to the operational modes where each region is accessible in one of a number of manners according to the operational modes.

Abstract: A timekeeping device has a reception unit that receives a satellite signal transmitted from a positioning information satellite, a time information generating unit that generates time information based on the received satellite signal, a time display unit that displays the time information, and a reception control unit that controls the reception unit. The reception control unit includes a signal condition detection unit that detects a signal condition of the received satellite signal, and a reception setting unit that sets the reception unit to a single satellite mode or a multi-satellite mode based on the detected signal condition.

Abstract: Dual-frequency (L1, L2) receiver for satellite-based positioning, comprising a main measurement channel (L1) and a secondary channel (L2) for a calculation for correction of ionospheric propagation robust to differential errors linked to the local reception environment of the signals, each channel comprising a code generator, a carrier phase generator, integrators, phase and code discriminators, a code phase numerically-controlled oscillator (NCOC), a carrier phase numerically-controlled oscillator (NCOP), carrier phase loop matched filtering means, and code phase loop matched filtering means, comprising, furthermore: means for determining the respective phase errors in the main and secondary channels comprising means of interspectral correlation (INT3, M3) of the signals of the main and secondary channels (L1, L2) already correlated by the local code, after frequency compensation of the relative Doppler shifts of the said signals; and respective feedback loops (B1, B2) for the code and carrier phase error

Abstract: A Global Positioning System (GPS) commercial receiver includes programmable logic that utilizes P-code modulated L1 and L2 GPS signals to derive estimates of in-phase and quadrature-phase components of both L1 and L2 signals, a programmable processor that calculates pseudoranges and pseudo-Doppler phases, and derives navigation solutions. A resulting complex accumulated L2 signal comprises near-ML estimates of desired L2 amplitude and pseudo- Doppler phase.

Abstract: A signal processing system for processing satellite positioning signals is described. The system comprises at least one processor and a signal processor operating under a number of operational modes. The signal processor includes at least one of a signal processing subsystem, a fast Fourier transform (FFT) subsystem, and a memory subsystem that are each dynamically and independently configurable in response to the operational modes. Further, the system includes a controller that couples to control transfer of data among the signal processing subsystem and the FFT subsystem via the memory subsystem. Configurability of the memory subsystem includes configuring the memory subsystem into regions according to the operational modes where each region is accessible in one of a number of manners according to the operational modes.

Abstract: Embodiments provided herein recite methods and systems for an accuracy estimator for a position fix. In one embodiment, a solution receiver for receiving a code solution and at least one additional solution from a different solution technique is utilized. In addition, a table of metric values comprising an associated accuracy estimate for at least one characteristic of each of the code solution and the at least one additional solution is also utilized. A comparator compares the code solution and the at least one additional solution with the table of metric values. In addition, a solution orderer orders the at least one additional solution above or below the code solution dependent on whether the at least one additional solution is within a pre-defined offset distance threshold. If the at least one additional solution is outside of the distance threshold, the code solution is chosen as the final solution.

Abstract: The present invention relates to a method for computing autonomous horizontal and vertical Protection Levels for least squares-based GNSS positioning, based on navigation residuals and an isotropic confidence ratio.

Abstract: To provide an art that can improve a performance of a GNSS receiver. A GNSS receiver 100 includes a receiver 1, a navigation message acquiring unit 3, a navigation message processor 5, and a calculator 6. The receiver 1 receives signals from satellites. The navigation message acquiring unit 3 acquires predetermined information in navigation messages contained in the signals received by the receiver. The navigation message processor 5 outputs either one of the same kind of information in the plural different kinds of navigation messages, which is acquired by the navigation message acquiring unit 3. The calculator 6 performs a calculation based on the information outputted from the navigation message processor 5.

Abstract: A timekeeping device has a reception unit that captures a positioning information satellite and receives satellite signals transmitted from the captured positioning information satellite, a time information generating unit that generates time information based on the satellite signal received by the reception unit, a time display unit that displays time information, and a reception control unit that controls the reception unit.

Abstract: A method for processing a set of navigation signals of a global navigation satellite system with at least three carrier signals is disclosed in which the processing of the navigation signals is based on a linear combination of the carrier signals to a combined signal. The weighting coefficients are selected such that the combined phase signal is free from geometry and free from frequency-independent disturbance variables.

Abstract: A method of locating a first GPS receiver relative to a second GPS receiver. The method includes the steps of: providing a first and second GPS receiver, the first and second GPS receiver spaced apart by a distance D along a baseline; receiving a finite number of observables from a plurality of GPS satellites in a finite period of time; performing in a batch mode the following series of calculations on the finite number of observables: calculating a least squares estimate position for each of the first GPS receiver and the second GPS receiver; calculating a plurality of single difference residuals; calculating a plurality of double difference residuals; calculating an estimate of a geometry free solution; applying geometric annihilation to the geometry free solution; and calculating a least squares solution to provide a measurement of the distance D. A batch processing mode differential GPS apparatus is also described.

Abstract: A receiver that receives a plurality of signals that are modulated with a common carrier, where each signal of said signals originates at a different source and experiences a transit delay and Doppler frequency shift before reaching the receiver, and where the transit delay and Doppler frequency shift are related to position and movement of each of the respective sources. The receiver includes means, such as a directional antenna, to ensure that the received signals are bona fide, or at least not subject to the same bogus signal or signals to which a second receiver may be subjected.

Abstract: The subject matter disclosed herein relates to a system and method for processing multiple navigation signal components received from multiple global navigation satellite systems (GNSS'). In a particular implementation, a code phase in a first navigation signal component may be detected based, at least in part, on information in a second navigation signal component.

Abstract: Methods and apparatus are provided for processing a set of GNSS signal data derived from signals of a first set of satellites having at least three carriers and signals of a second set of satellites having two carriers. A geometry filter uses a geometry filter combination to obtain an array of geometry-filter ambiguity estimates for the geometry filter combination and associated statistical information. Ionosphere filters use a two-frequency ionospheric combination to obtain an array of ionosphere-filter ambiguity estimates for the two-frequency ionospheric combinations and associated statistical information. Each two-frequency ionospheric combination comprises a geometry-free two-frequency ionospheric residual carrier-phase combination of observations of a first frequency and observations of a second frequency.

Abstract: A positioning receiver in which the circuit configuration of the receiving system corresponding to a plurality of positioning systems can be simplified and the current consumption and circuit size of which can be reduced. A positioning receiver (100) comprises first low-pass filters (111, 121) which limit outputs of a first signal mixer (103) and a second signal mixer (104) to a first bandwidth, and second low-pass filters (112, 122) which are provided on the output side of the first low-pass filters (111, 121) and limit the outputs of the first low-pass filters (111, 121) to a second bandwidth narrower than the first bandwidth and sets the filter bandwidth of the first low-pass filters (111, 121) greater than that of the second low-pass filters (112, 122).

Abstract: A shared memory device for a receiver system is disclosed. The receiver system is configured to have a first functional stage and a second functional stage for processing information carried by signals from a first transmitter system and a second transmitter system respectively. The shared memory device has a memory space, allocated to be commonly shared by the first functional stage and the second functional stage, for buffering processing data generated from the first functional stage or the second functional stage.

Abstract: Methods and apparatus for processing of data from GNSS receivers are presented. (1) A real-time GNSS rover-engine, a long distance multi baseline averaging (MBA) method, and a stochastic post-processed accuracy predictor are described. (2) The real-time GNSS rover-engine provides high accuracy position determination (decimeter-level) with short occupation time (2 Minutes) for GIS applications. The long distance multi baseline averaging (MBA) method improves differential-correction accuracy by averaging the position results from several different baselines. This technique provides a higher accuracy than any single baseline solution. It was found, that for long baselines (more than about 250 km), the usage of non-iono-free observables (e.g. L1-only or wide-lane) leads to a higher accuracy with MBA compared to the commonly used iono-free (LC) combination, because of the less noisy observables and the cancellation of the residual ionospheric errors.

Abstract: A method for estimating satellite-satellite single difference biases is described. The method uses an ionosphere-free mixed code-carrier combination of maximum ambiguities discrimination defined at the ration between wavelength and noise standard deviation. The accuracy of the biases estimation is further improved by an additional ionosphere-free mixed code-carrier combination of time-difference measurement that is uncorrelated with the first combination. Finally, an alternative method is based on a combination of carrier signals in a common frequency band which allows estimating the biases individually.

Abstract: A multifrequency receiver comprises a first receiving subsystem comprising: means for receiving at least a first and a second distinct frequency at least one of which comprises a signal containing information relating to the position of a satellite, the said receiving means comprising: a first amplification stage delivering a first filtered signal based on the signal received by the receiver; a second stage for processing each of the received frequencies; a third stage comprising a mixer and at least one local oscillator; and a fourth amplification and filtering stage making it possible to amplify the filtered signal at the output of the mixer. The second stage comprises: a first switch; means for amplifying the signals of the two channels; and a second switch making it possible to deliver the signal to the third stage.

Abstract: A dual-band GPS receiver and method and apparatus for downconversion of dual-band GPS signals. A dual-band GPS receiver in accordance with the present invention comprises an antenna, a Radio Frequency (RF) section, coupled to the antenna, and a baseband section, coupled to the RF section, wherein the RF section comprises a receiver, the receiver receiving signals from a first GPS frequency band and a second GPS frequency band, a local oscillator having a local oscillator frequency, and a mixer, coupled to the receiver and the local oscillator, for selectively mixing the local oscillator frequency with the first GPS frequency band and a second GPS frequency band, wherein the local oscillator frequency downconverts the first GPS frequency band and the second GPS frequency band into a common downconversion frequency band.

Abstract: The positioning apparatus and position apparatus control method are able to efficiently receive useful signals without special circuitry.

Abstract: Methods and Apparatuses are provided for selectively specifying a mode of operation of a navigation radio within a device based, at least in part, on at least one operative condition associated with at least one other radio within the device.

Abstract: A navigation signal generator on a framework that provides a standardized object-oriented means for developing and managing signal processing functions. The framework provides the ability to dynamically reallocate functions allowing numerous communications, signals intelligence, and information warfare missions that may be required under a single platform and co-exist with other frameworks. In one embodiment the system is a software defined navigation augmentation using the software defined radio architecture.

Abstract: A temporal nuller for removing or minimizing narrow band interference/jamming power from a global positioning system (GPS) receiver's input includes a first signal path having a first input and a first output, at least one time delay device and an adjustable phase shift device located within the first signal path, and a second signal path having a second input and a second output. The first signal input is connected to the second signal input, and the first signal output is connected to the second signal output. Further, the at least one time delay device is operative to introduce a time delay between a signal at an output of the at least one time delay device relative to a signal at an input of the at least one time delay device.