Abstract: A wireless ranging system (700) estimates a distance (703) between wireless devices (701, 702) by calibrating the devices through exchanging calibration packets (512, 524) to adjust transceiver settings for performing phase measurements at the wireless devices, and then transmitting a measurement packet (704) from a first wireless device to a second wireless device to synchronize the first and second wireless devices and to perform a two-way IQ data capture sequence at different carrier frequencies during processing of the measurement packet so that the first and second wireless devices each measure phase values for each of the plurality of different carrier frequencies, where the phase values at each of the first and second wireless devices are processed to generate a combined phase offset vector which is processed to determine a first estimated distance between the first and second wireless devices.

Abstract: A system and method of determining the angle of arrival or departure using a neural network is disclosed. The system collects a plurality of I and Q samples as a packet containing a constant tone extension is being received. The I and Q samples are used to form I and Q arrays, which are used as the input to the neural network. The neural network produces a first output representative of the azimuth angle and a second output representative of the elevation angle. In certain embodiments, the neural network is capable of detecting a plurality of angles, where, for each angle, there are three outputs, a first output representative of the azimuth angle, a second output representative of the elevation angle and a third output representative of the relative amplitude. In some embodiments, the neural network is configured to determine the carrier frequency offset of an incoming signal as well.

Abstract: Accurate estimation of the trajectory of a vehicle by selecting optimal number of GPS data points and a shortest path technique applied for estimation is important and crucial. Method and system for estimating a trajectory from GPS data points is described. The method disclosed utilizes a plurality of GPS data points of a vehicle, an existing road map and a set of equal time intervals obtained by dividing an elapsed time during movement of the vehicle. Each GPS data point is associated to a time interval and a set of candidate points are mapped to each GPS data point correspondingly. A set of possible paths are determined between the set of candidate points in each time interval to estimate the trajectory of the vehicle using one of a shortest path technique and an edit distance technique.

Abstract: In order to achieve the object described above, a communication management system includes: a surveying instrument including a survey unit, a GPS device, a control unit, and a communication unit; a management server capable of communicating with the surveying instrument; and a remote terminal capable of communicating with the management server, wherein the remote terminal sets a usable range of the surveying instrument, and sets determination on entrance and exit of the surveying instrument into and from the usable range, and an operation responsive to results of the determination, and makes the management server store these, the surveying instrument transmits own GPS information to the management server, and the management server compares entrance and exit of the surveying instrument into and from the usable range with the GPS information and executes the determination, and executes the operation based on results of the determination.

Abstract: The present invention relates to a device (DISP) for identifying a position (PosB) of a secondary electronic unit (BA) on a motor vehicle (V), comprising: —a central electronic unit (PE) suitable for managing the power supply to a plurality of secondary electronic units (BA) and having: —a switching device (DC) for switching the power supply to all the secondary electronic units (BA); —a main timer (CPTA) suitable for being triggered in a time-correlated manner with the activation of the power supply to said secondary electronic units (BA) by said switching device (DC); —and said plurality of secondary electronic units (BA); wherein each of said secondary electronic units (BA) comprises a secondary timer (CPTB) suitable for being triggered in a time-correlated manner with the power supply to said secondary electronic unit (BA); and is suitable for performing internally at least one measurement of a voltage (VH, VL) when it is powered, said at least one measurement of a voltage (VH, VL) representing the positi

Abstract: A system configured for rough localization of moveable cooperative targets. The system includes at least one laser tracker, having a moveable upper part connected to a base part, an optical target rough location detector automatically detecting a rough location of a cooperative target, a target fine position detector automatically detecting a fine position of a cooperative target within a fine position field of view, motors for changing an orientation of the moveable upper part, a motor controller, and a computer, a first and a second radio frequency telegram (RFT) transceiver (RFTT) anchor-module, wherein each RFTT anchor-module's position is referenced to the laser tracker, a cooperative target associated with a RFTT tag-module and each of the RFTT tag- and anchor-modules an evaluation unit configured for determining a RFT-transmission specific parameter based on the transmission of RFTs between the RFTT anchor- and tag-modules and providing said RFT-transmission specific parameter to the computer.

Abstract: A GNSS hostile environment simulator for accurate real-time processor & hardware in the loop (PHIL) simulations of a multiple antenna GNSSR/AJ system models antenna effects over the entire signal bandwidth allowing direct injection of the RF into the GNSSR. Computational efficiency is achieved by applying the antenna patterns in the frequency domain. To preserve the integrity of the antenna signals, the transmitter signals are generated over an extended period to push any residual ringing outside the update window. Efficiency is further enhanced by using a combination of single-precision and double-precision floating-point units to generate the samples of the transmitter signals with single-precision floating-point. All subsequent calculations are then computed in single-precision.

Abstract: The present disclosure relates to a method for enhancing sematic features of SAR image oriented small set of samples, comprising: acquiring a sample set of an SAR target image, and performing transfer learning and training on the sample set to obtain a initialized deep neural network of an SAR target image, the sample set comprising an SAR target image and an SAR target virtual image; performing network optimization on the deep neural network by an activation function, and extracting features of the SAR target image by the optimized deep neural network to obtain a feature map; and mapping, by an auto-encoder, the feature map between a feature space and a semantic space to obtain a deep visual feature with an enhanced semantic feature.

Abstract: Mechanisms compressive sampling to detect direction of arrival (DoA) of a signal of interest (SoI), comprising: in each of a plurality of receiver paths, receiving the SoI and producing a received signal using an antenna; and using a modulator to: receive a modulator input signal (MIS) based on the received signal produced by the antenna in the path; modulate the MIS at multiple points in time (MPIT) based on different ones of a plurality of pseudo-random numbers; and produce a plurality of modulated output signals in response to the modulating of the MIS at the MPIT; summing across the receiver paths the one of the modulated output signals produced by each of the receiver paths for each of the MPIT, to produce a plurality of sum signals each corresponding to one of the MPIT; and performing a compressed sensing recovery algorithm to recover the DoA of the SoI.

Abstract: A radar apparatus includes: a receiving unit including plural receiving antennas including an antenna element, and configured to receive incoming waves whose arrival directions are known; and a calculating unit configured to calculate a correction value for correcting an error component included in a received signal of the incoming waves received by the receiving unit based on the received signal, the correction value being depending on an azimuth of the antenna element.

Abstract: A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.

Abstract: A local error estimation unit (515) of a local error generation device (500) estimates and generates local errors (?T, ?I) based on global errors (?o, ?t, ?b) included in positioning augmentation information (81) produced in an electronic reference point network (120) and observed data (61) generated by receivers on electronic reference points (611, 612) not belonging to the electronic reference point network (120). The local errors (?T, ?I) are errors that influence positioning accuracy in a region where the electronic reference points (611, 612) exist and that depend on the region where the electronic reference points (611, 612) exist.

Abstract: A method for aligning an earth station antenna with a satellite antenna includes sending an uplink signal from the earth station antenna to the satellite antenna; measuring at least a strength of the uplink signal received by the satellite antenna; sending by telemetry the measured signal strength to a telemetry station; adjusting the orientation of the earth station antenna in order to maximize the measured signal strength.

Abstract: Systems, apparatus, and related methods for distributing power associated with radars are disclosed. A disclosed bus bar assembly for a radar power distribution system includes a first vertical bus and first horizontal buses electrically coupled to the first vertical bus. The bus bar assembly also includes a second vertical bus and second horizontal buses electrically coupled to the second vertical bus. The bus bar assembly also includes first blind mate connectors coupled to the first horizontal buses whereby each of the first horizontal buses includes a pair of the first blind mate connectors configured to removably connect to an LRU. The bus bar assembly also includes second blind mate connectors coupled to the second horizontal busses whereby each of the second horizontal buses includes a pair of the second blind mate connectors configured to removably connect to an LRU.

Abstract: Systems, methods, and computer-readable media are described for compact radar systems. In some examples, a compact radar system can include a first set of transmit antennas, a second set of receive antennas, one or more processors, and at least one computer-readable storage medium storing computer-executable instructions which, when executed by the one or more processors, cause the radar system to coordinate digital beam steering of the first set of transmit antennas and the second set of receive antennas, and coordinate digital beam forming with one or more of the second set of receive antennas to detect one or more objects within a distance of the radar system.

Abstract: Provided are computer-implemented methods that include receiving one or more messages from a device in a transmit state, including: a first message received at a first power level, the first message including data associated with a power level at which the first message was transmitted by the device in the transmit state, and a second message received at a second power level, the second message including data associated with a power level at which the second message was transmitted by the device in the transmit state; and determining a heading toward the device in the transmit state based on the first message and the second message. In some non-limiting embodiments or aspects, the method may include outputting data associated with an indication of the heading toward the device in the transmit state. Systems and computer program products are also provided.

Abstract: A system for tracking a state of a GNSS receiver uses a subset of the measurements of satellite signals selected to avoid the need for intermediate integers ambiguity estimate. The system selects the subset of measurements for the state tracking such that each measurement in the selected subset of measurements is formed by a weighted combination of multiple different measurements from the set of measurements. The system uses a probabilistic state estimator that tracks the state of the GNSS receiver using a probabilistic motion model subject to noise and a probabilistic measurement model relating the selected subset of the measurements of satellite signals to the current state of the receiver.

Abstract: Integrated circuit devices are disclosed. The integrated circuit device includes a focus detection pixel and a lens. The focus detection pixel includes a photosensitive unit and a photo-insensitive unit in a substrate. The lens is disposed over the focus detection pixel, wherein the photosensitive unit and the photo-insensitive unit are disposed opposite to each other with respect to an optical axis of the lens, and a light beam passing through the lens is simultaneously incident into the photosensitive unit and the photo-insensitive unit.

Abstract: A method for fabricating a semiconductor structure is provided. The method includes forming a semiconductor chip; providing a printed circuit board; and forming an adhesive layer between a connection surface of the semiconductor chip and the printed circuit board to bond the semiconductor chip with the printed circuit board. The semiconductor chip includes a plurality of cutting tracks intersected with each other to enclose an area having corner regions. The connection surface of the semiconductor chip includes a plurality of conductive bumps and a plurality of first openings are formed in each of the corner regions.

Abstract: A radar fill level measurement device includes an arrangement having at least one radar chip which has a plurality of transmitting channels and a plurality of receiving channels. In addition, the device includes an antenna arrangement having a plurality of transmitting elements and receiving elements. The device has more transmitting channels than transmitting elements and/or more receiving channels than receiving elements.