Abstract: Some embodiments of the invention pertain to methods carried out by a navigation satellite system (NSS) receiver for estimating parameters useful to determine a position. The receiver observes signals from satellites. Delta carrier phase observables are computed by subtracting observables of different epochs. An estimator uses state variables and computes their values based on the computed delta carrier phase observables. A synthetic carrier phase observable for an anchor epoch is generated, for each carrier phase observable of a terminus epoch for which one of the following applies: (i) a change in phase ambiguity occurred with respect to the corresponding carrier phase observable of the anchor epoch, and (ii) no corresponding carrier phase observable was tracked at the anchor epoch. Generated synthetic carrier phase observables are used to compute delta carrier phase observables between the anchor epoch and an epoch subsequent to the terminus epoch. Systems and vehicles are also disclosed.

Abstract: An inter-node ranging method includes a first node that sends a plurality of first sequences to a second node; the first node receives a plurality of second delayed sequences from the second node; the first node determines a first phase difference between the first sequences and the second delayed sequences; and the first node determines a distance between the first node and the second node based on the first phase difference.

Abstract: Provided are a communication method, a terminal device and a network device. The terminal device receives configuration information sent by a network device, the configuration information being used for indicating one or more conditions for the terminal device to report random access-related information. The terminal device sends a successful handover report that does not contain the random access-related information to the network device in response to a random access of the terminal device not satisfying the one or more conditions for reporting the random access-related information.

Abstract: Systems and methods for monitoring life signs in a subject a radar unit comprising generates raw data and a processor unit receives raw data and identifies oscillating signals in a series of frames of complex values representing radiation reflected from each voxel of a target region during a given time segment. A processor may collate a series of complex values for each voxel representing reflected radiation for the associated voxel in multiple frames and generate therefrom a real signal sample for each voxel. Neural networks may be used to select the voxel with the best waveform.

Abstract: A method for mapping a surface using signals transmitted from a single transmitter comprises: receiving signals transmitted from the single transmitter, where each signal has a different propagation path; determining a motion of an antenna of the receiver; generating phasor sequences, where each phasor sequence represents a hypothesis based on antenna motion and a direction of arrival estimate for each received signal; compensating the received signals, local signals, or correlation results from correlating the received signals with the local signals using the phasor sequences based on the hypotheses to generate compensated correlation results; determining a preferred hypothesis in the hypotheses for each received signal that optimizes each correlation result; identifying a direction of arrival for each received signal using the determined hypothesis; determining a point of reflection from the direction of arrival of each received signal; and combining the points of reflection into one or more reflective surf

Abstract: Techniques are provided for mitigating interferometric angle ambiguity.

Abstract: A system for estimating position information with respect to at least one target node including for example two static nodes, at least one reference node, the at least one target node, and at least one processing unit. In this context, at least two of the at least two static nodes are configured each as a source for wirelessly transmitting at least signal fragments. Furthermore, at least two of the at least one reference node and the at least one target node are configured each as a receiver for wirelessly receiving the signal fragments from the at least two sources. In addition to this, the at least two receivers are configured to measure the phases of a set of common signal fragments from the at least two sources and to estimate position information with respect to the at least one target node on the basis of the phase measurements.

Abstract: A beamforming IC operates in a transmit mode or a receive mode to respectively transmit and receive signals at different times. To that end, the beamforming IC has an element interface, a transmit branch configured to produce an output transmit signal through the element interface when in the transmit mode, and a receive branch configured to receive an input signal through the element interface when in the receive mode. The beamforming circuit also has a sampling circuit with an electrical coupling with the transmit branch. The sampling circuit is configured to sample the output transmit signal with the electrical coupling to produce a sample signal. The sampling circuit also is configured to direct the sample signal through the receive branch, which is configured to modify the phase of the sample signal to produce a modified sample signal. This modified sample signal can be used to manage the IC transmission.

Abstract: A system for insitu AESA calibration includes a radar receiver/excitor (XR). The calibrated XR functions as a precision multi-channel relative amplitude and phase microwave frequency measurement device that executes a known AESA calibration methodology. An integrated RF sensor system-level built in test (BIT) is utilized for prognostic health monitoring and self-healing calibration. During calibration, quadrants of the AESA are iteratively calibrated via measurements by the XR. I/Q values are balanced for each quadrant relative to each other without the need for a separately calibrated measurement device for absolute calibration. A near field probe may be disposed for radiative loopback measurements. A T/R calibration circuit receives the loopback measurements and data from a Tx channel.

Abstract: Disclosed herein is an apparatus including a transmitter configured to transmit a signal through a transmission antenna, a receiver configured to receive a signal reflected from a target through a reception antenna and output the received signal as a digital signal, and a signal processor electrically connected to the transmitter and the receiver, wherein the signal processor generates a virtual antenna signal based on an original signal received from the receiver and suppress a side lobe of the original signal based on the virtual antenna signal.

Abstract: A clock error prediction method includes: obtaining historical satellite clock error data of a preset time period which includes broadcast ephemeris clock error data and precise ephemeris clock error data; obtaining corrected precise ephemeris clock error data based on the broadcast ephemeris clock error data; obtaining a single-day clock speed of each satellite through fitting based on single-day clock error data in the corrected precise ephemeris clock error data of each satellite; obtaining a clock speed time sequence of each satellite based on the single-day clock speed of each satellite; obtaining a clock speed change rate of each satellite through fitting based on the clock speed time sequence of each satellite; and obtaining a predicted clock error of each satellite in a preset future time period based on an initial clock error value, a clock speed, and the clock speed change rate of each satellite.

Abstract: An aircraft-based system for providing forward-looking terrain profiling and downward-looking altimetry via a single active electronically scanned array (AESA) orients the AESA through a sequence of desired directions, e.g., according to a predetermined scan pattern. At each desired direction, the AESA scans for ground-based targets, determining a range and Doppler velocity to each detected target. The AESA additionally orients downward, e.g., during a dedicated altimetry frame and with the assistance of inertial sensors to determine the orientation of the AESA, to scan terrain directly below the aircraft and provide a precise estimate of the altitude of the aircraft. Based on the determined ranges and velocities, the radar system determines a pointing angle and vertical/horizontal distances between the aircraft and each identified ground-based target.

Abstract: An information processing apparatus includes a generation unit that generates a calibration parameter on the basis of a phase difference vector and a reference phase difference vector that is a reference, where the phase difference vector is calculated on the basis of a sensing result, the sensing result is measured by a distance measurement sensor, the distance measurement sensor includes a plurality of first reception antennas and one or more transmission antennas, the plurality of first reception antennas includes a reference reception antenna and one or more second reception antennas, and the phase difference vector is a phase difference vector between the reference reception antenna and each of the one or more second reception antennas.

Abstract: The present disclosure relates to an automatic interference/jamming detection system for use with a GNSS receiver or a GNSS receiver and off-the-shelf jamming detector. The automatic jamming detection system utilizes one of the following two techniques: using a jamming detector in conjunction with a GNSS receiver in order to analyze received data for key data indicators for suspicious interference/jamming activities such as signal-to-noise ratio, phase or maximum power, or using a trained jamming detection algorithm to convert received/stored GNSS data into spectrograms to visually highlight anomalies or potential interference/jamming events and then further using the Box-Cox transform to train the algorithm in order to transform data into a normal distribution for comparison against user tunable thresholds to further highlight potential interference/jamming events.

Abstract: According to an example embodiment, a client device is configured to receive a first positioning reference signal; identify an orientation of a polarisation of the first positioning reference signal based on the received first positioning reference signal; estimate an orientation of the client device based on at least the identified orientation of the polarisation of the first positioning reference signal; and provide the orientation estimate to a network node device, Devices, methods, and computer programs are disclosed.

Abstract: An apparatus comprising an interface and a processor. The interface may be configured to present a probe signal and receive raw radar data generated in response to a reflection of the probe signal. The processor may be configured to generate a plurality of profile configurations, interleave the plurality of profile configurations into the probe signal, and reconstruct a radar output based on the plurality of profile configurations in response to the raw radar data. Interleaving the profile configurations into the probe signal may enable the raw radar data to be received comprising information about an environment corresponding to each of the profile configurations at one time frame. Interleaving the profile configurations may enable the processor to extract the information about the environment corresponding to each of the profile configurations independent from each other. The radar output may comprise the information about the environment.

Abstract: An auxiliary installation tool for a vehicle radar includes an angle ruler. The angle ruler includes a first reference section, a second reference section, and a radar installation section. The first reference section and the second reference section are connected and intersect at a right angle, wherein during measurement, the first reference section is configured for aligning with a vehicle body horizontal line, the second reference section is configured for aligning with or parallel to a vehicle rear horizontal line, the vehicle body horizontal line and the vehicle rear horizontal line respectively extend along the body and the rear of a vehicle and intersect at a corner of the vehicle. The radar installation section is correspondingly located at the corner of the vehicle, and the radar installation section and the second reference section are connected and intersect at a radar installation angle.

Abstract: A radar signal processing device includes: a forming unit to form beams by using reception signals; a compensation unit to compensate for a phase within a range frequency; a generation unit to generate an image of each beam by applying Fourier transform in an azimuth direction to the beams (with phases compensated; an identification unit to identify a position of a target object based on the image; a calculation unit to calculate power of each beam represented by the image of each beam at a position of the target object; a computing unit to compute an antenna gain of each beam at a position of the target object; and an angle measurement unit to measure angle on the target object by performing maximum likelihood estimation of comparing the power of each beam with the antenna gain of each beam at the position of the target object.

Abstract: Disclosed are exemplary embodiments of patterned electromagnetic interference (EMI) mitigation materials (e.g., EMI absorbers, thermally-conductive EMI absorbers, etc.) including carbon nanotubes. The carbon nanotubes may comprise single-walled carbon nanotubes, multi-walled carbon nanotubes, and/or carbon nanostructures comprising a branched network of crosslinked carbon nanotube structures. For example, an EMI mitigation material may comprise a filled dielectric including a pattern of EMI absorbers. The filled dielectric comprises carbon nanotubes.

Abstract: A transmitting device location estimation device and a transmitting device location estimation method for estimating the location of a transmitting device under water are disclosed. A transmitting device location estimation device, in a transmitting device location estimation device for estimating the location of a transmitting device under water, is characterized by comprising: a distance location estimation unit that estimates the distance and location of the transmitting device based on the time taken to receive the transmission signal transmitted by the transmitting device and the speed of the transmission signal; a direction estimation unit that estimates the direction of the transmitting device; and an estimated location confirmation unit that confirms the estimated location of the transmitting device based on the estimated distance and location of the transmitting device and the estimated direction of the transmitting device.