Abstract: A navigation method based on satellite positioning data and non-satellite positioning data includes the following steps of: computing a first reference navigation that is hybridised on the basis of non-satellite positioning data and satellite positioning data, the first reference navigation being reset on the satellite positioning data; performing a statistical analysis of the positional corrections provided by the first reference navigation and deducing therefrom the existence or the absence of a deception operation of the satellite signal receiver. A navigation system for implementing this method is disclosed.

Abstract: Disclosed is a method including: determining a location of each of a plurality of cellular base stations; receiving, at a vehicle, a first signal transmitted by a first cellular base station; receiving a second signal transmitted by a second cellular base station; determining a first angle of arrival of the first signal and a second angle of arrival of the second signal; demodulating the first signal to determine a first identity of the first cellular base station; demodulating the second signal to determine a second identity of the second cellular base station; determining a first location of the first cellular base station based on the first identity; determining a second location of the second cellular base station based on the second identity; and determining a position and velocity of the vehicle from the first location, the first angle of arrival, the second location and the second angle of arrival.

Abstract: A method and apparatus for performing motion compensated signal processing without using traditional IMU data from a full complement of traditional IMU sensors. In some embodiments, the method may include: receiving, at a receiver, a first signal from a remote source in a first direction; providing a first local signal; determining, using first data, and without using data derived from an accelerometer, a movement of the receiver; providing a correlation signal by correlating the local signal with the received signal; providing motion compensation of at least one of the local signal, the received signal, and the correlation signal, based on the determined movement in the first direction to provide preferential gain for a signal received along the first direction and processing the received first signal based on the said correlation.

Abstract: A radio-determined environment sensing system includes: (a) a first transmitter configured to transmit a pilot radio signal; (b) at least one receiver configured to receive a mixture of signals including the pilot signal and reflections thereof; and (c) at least one control unit configured to receive the mixture of signals from the UE modules and process them to generate channel estimates and therefrom to extract the taps contained. The first transmitter and the at least one receiver are static over a certain time period. The control unit is configured to operate a processing procedure to generate at least one power delay profile (PDP) tap from the channel estimate, and evaluate changes in the environment from information contained in a calculated measurement vector zk.

Abstract: Provided are a system and method of an advanced dynamic multi lead technology utilizing Ultra Wideband and other sensors to improve position accuracy and data sharing among devices. The system and method use a high calculation process to enhance the position and sharing technology, focusing on representative devices as lead devices. The remaining devices act passively to locate their coordinate positions using the lead devices as a reference and as a medium to share resources.

Abstract: There is provided a technique of operating a real-time locating system (RTLS) in an indoor environment. The technique comprises: obtaining from a UD a timestamped dataset informative of ID of a tagged object registered by the UD in its proximity, of ID of the UD and of ambiguous sample electromagnetic pattern (SEP) registered by the UD; and defining a location of the tagged object at a point-in-time in accordance with the location of the UD, the point-in-time corresponding to a timestamp of the dataset. The location of the UD is defined using a SEP map informative of associations, at point-in-time, between the SEPs and locations thereof. The SEP map is continuously generated by processing timestamped “UD reports” continuously received from a plurality of UDs, each “UD report” comprising data informative of a respectively registered SEP and a unique identification of a reported UD (IDUD).

Abstract: A method for determining a protection level of a position estimate using a single epoch of GNSS measurements, the method includes: specifying a prior probability density P(x) of a state x; specifying a system model h(x) that relates the state x to observables z of the measurements; quantifying quality metrics q associated with the measurements; specifying a non-Gaussian residual error probability density model ƒ(r|?, q) and fitting model parameters ? using a set of experimental data; and defining a posterior probability density P(x|z, q, ?); estimating the state x; and computing the protection level by integrating the posterior probability density P(x|z, q, ?) over the state x.

Abstract: This present disclosure is directed to a positioning, navigation, timing, ranging, or beacon receiver system. The system includes originating or relay transmitters on one or more platforms; corresponding receivers on one or more other platforms; and multiple-hop timing marker pathways with each timing marker pathway extending from one of the one or more originating transmitters to one of the one or more corresponding receivers. The originating or relay transmitters are configured to place timing markers on transmission signals, where at least one of the timing markers is a virtual timing marker. The virtual timing marker indicates the location of a first selected target timing marker position on the transmission signals and comprises a message containing a transmitter-side determined displacement or time offset of the first selected target timing marker position from a second indicated position of a second timing marker.

Abstract: A method is disclosed for determining a signal's time of arrival at a receiver device, the signal being transmitted by a transmitter device to the receiver device. The method comprises correlating the signal as transmitted by the transmitter device and the signal as received by the receiver device with each other. The signal comprises in its frequency spectrum a first signal component spanning a first frequency range, a second signal component spanning a second frequency range and a third signal component spanning a third frequency range. The first frequency range and second frequency range are separated by a first intermediate frequency range that does not contain a signal component of the signal. The second frequency range and third frequency range are separated by a second intermediate frequency range that does not contain a signal component of the signal. The method further comprises, based on the performed correlation, determining said time of arrival.

Abstract: A device implementing a system for device orientation initialization includes at least one processor configured to determine that the device is within or coupled to a vehicle in motion. The at least one processor is configured to employ, in response to the determining, a first position estimation model to estimate a position of the device, and detect occurrence of a predefined condition with respect to employing the first position estimation model. The at least one processor is further configured to switch, in response to detecting occurrence of the predefined condition, from employing the first position estimation model to employing a second position estimation model to estimate the position of the device. The first and second position estimation model apply different respective error state metrics in estimating the position of the device.

Abstract: A interference detection device performing the following actions: receiving individual position data from mobile terminals which individual position data indicates an area in which individual ones of the mobile terminals are located based on positioning signals received by the mobile terminals; identifying if individual position data may have been affected by one or more interfering signals transmitted by interfering device and interfering with the positioning signals; (A) identifying if a number of mobile terminals in a first area is higher than a maximum threshold number, and, if so, determining that individual position data of the number of mobile terminals may have been affected by the interfering signals; or (B) identifying if a number of the mobile terminals in a second area is lower than a minimum threshold number; and, if so, determining that individual position data of the number of mobile terminals may have been affected by interfering signals; or (C) receiving further individual position data which

Abstract: Techniques for direction finding and geolocation of a GPS spoofer. A methodology implementing the techniques according to an embodiment includes steering a beam in a direction selected from a search constellation and measuring a first signal power received through the steered beam. The method also includes steering a null in the selected direction and measuring a second signal power received through the steered null. The method further includes calculating a difference between the first signal power and the second signal power and estimating an angle of arrival (AOA) of the GPS spoofer signal as the selected direction if the calculated difference exceeds a threshold power value. In some such examples, the method includes accumulating signals having four similar estimated AOAs, associated with unique pseudo-random noise codes, and employing a GPS receiver to calculate a candidate position of a source of the GPS spoofer signals based on the accumulated signals.

Abstract: A method for determining a distance between two objects with the involvement of a third object. The first object can be an authorization means, such as a key fob or a mobile telephone. In the method, a first object transmits one or more first-object signals with different first-object frequencies and at least one third object transmits at least one third-object signal. A second object receives the first-object signal and the third-object signal, and on the basis thereof the distance between the first object and the second object is determined. The second object and the third object are clock- and/or time-synchronized. The method includes the feature that the third object and/or the first object switches between at least two frequencies such that phase coherence is maintained or such that the phase jump is known.

Abstract: A method comprising receiving, at a receiver, a plurality of signals from at least one remote source and selecting at least one selected signal in the plurality of signals. The method determines, using the at least one selected signal, a position of the receiver and receives correction data for improving the position of the receiver to a sub-wavelength accuracy. The method further determines motion of the receiver, generates, from the at least one selected signal, a motion-compensated correlation signal based on the determined motion of the receiver and uses the motion-compensated correlation signal to either (1) select the at least one selected signal to be used to determine the position of the receiver, (2) correct at least one of motion sensor errors or clock errors, or (3) both (1) and (2). Embodiments include a positioning system for performing the method.

Abstract: A preprocessing method of a data preprocessing device is provided. The preprocessing method includes dividing a region, where the target object is located, into coarse grids and generating first sample data including a similarity value between a virtual sensor measurement value and a real sensor measurement value measured in each of the coarse grids, dividing each coarse grid into fine grids and generating second sample data including a similarity value between a virtual sensor measurement value and a real sensor measurement value measured in each of the fine grids, dividing each fine grid into finer grids and generating third sample data including a similarity value between a virtual sensor measurement value and a real sensor measurement value measured in each of the finer grids, and inputting the training data, including the first to third sample data, to the deep learning model.

Abstract: Techniques are provided for power management of a global positioning system (GPS) receiver. A methodology implementing the techniques according to an embodiment includes calculating a pedestal ionospheric delay based on a phase difference between a first GPS signal at a first center frequency and a second GPS signal at a second center frequency. The method also includes powering off a processing chain configured to provide the second GPS signal. The method further includes calculating, at periodic intervals, a secondary ionospheric delay based on a phase difference between an upper sideband and a lower sideband of the first GPS signal and accumulating differences between consecutively calculated secondary ionospheric delays. The method further includes, in response to the accumulated differences exceeding a threshold value, powering on the processing chain configured to provide the second GPS signal and recalculating the pedestal ionospheric delay.

Abstract: A system for obfuscating locations of mobile devices and for simultaneously determining and reporting both actual locations and obfuscated locations of the mobile devices operating in a wireless communications network includes a receive section in wireless communication with a mobile device over the network, and in communication with geo-position satellites (GPS), the receive section including GPS receive antennae coupled by a corresponding cable to corresponding ones of GPS repeaters. The system further includes a monitoring section in communication with the mobile device. The monitoring section includes a processor that accesses a mapping table relating an actual GPS repeater location to an obfuscated GPS repeater location in which the mobile device obfuscated location is the obfuscated location of a nearest GPS repeater and the actual location of the mobile device is the obfuscated location of the GPS repeater minus an obfuscation offset. The processor reports mobile device actual and obfuscated locations.

Abstract: The present disclosure is directed to a location tracking system and device that uses spline coefficients, a timing parameter, and a number n of spatial positions to be interpolated in a location message payload rather than the actual satellite coordinates.

Abstract: A system to detect spoofing or jamming of GNSS signals comprises a GNSS receiver onboard a vehicle; an onboard INS and an IMU for producing vehicle inertial measurements; and an onboard processor that receives data outputs from the GNSS receiver and INS.

Abstract: Disclosed in the present invention is a method for estimating a direction of arrival of a sub-array partition type L-shaped coprime array based on fourth-order sampling covariance tensor denoising. The implementation steps are as follows: constructing an L-shaped coprime array partitioned with linear sub-arrays; modeling a receiving signal of the L-shaped coprime array and deriving a second-order cross-correlation matrix thereof; deriving a fourth-order covariance tensor based on the cross-correlation matrix; realizing fourth-order sampling covariance tensor denoising based on kernel tensor thresholding; deriving a fourth-order virtual domain signal based on denoised sampling covariance tensor; constructing a denoised structured virtual domain tensor; obtaining a direction of arrival estimation result by decomposing the structured virtual domain tensor.