Abstract: The present invention discloses a radar target spherical projection method for maritime formation. The method comprises the steps of converting the height of a radar target into an altitude and converting the position of the radar target into a spherical position, can be used for pre-processing radar data, supports multi-platform composite tracking based on a data chain, and contribute to generating a sharable single integrated picture (SIP) among formation members. The present invention can be widely applied to oceanic area formation operations such as coastguard patrol, sea escort, deep sea far sighting and maritime formation fight.

Abstract: A method of operating a vertical incidence sounder. The sounder transmits a random modulated sounder signal, and receives a return signal, comprising a directwave component and a reflected component. A first cross-ambiguity process between the transmitted signal and the return signal is used to time and frequency align the return signal with the transmitted signal. The direct wave signal is removed, thereby producing a processed return signal. A second cross-ambiguity process between the transmitted signal and the processed return signal is performed to determine a time offset, which is used to estimate an ionospheric height.

Abstract: In one embodiment, a method includes causing a radar antenna to transmit a plurality of radar signals at a plurality of sweep angles and, for each of one or more the radar signals reflected back to the radar antenna, calculating a radial-velocity component. The method also includes identifying one of the radial-velocity components, identifying one of the plurality of sweep angles corresponding to the identified radial-velocity components, and calculating an offset of an electrical boresight of the radar antenna based at least in part on the identified sweep angle corresponding to the identified radial-velocity component.

Abstract: The present disclosure is directed toward a method and system for checking a vehicle height and radar aim of a vehicle. The method includes estimating, by a forward imaging system disposed in a vehicle, a vehicle height, and determining whether the estimated vehicle height is within a predefined height tolerance. The method further includes performing, by a radar system disposed in the vehicle, a radar alignment test to determine whether a radar device of the radar system is aligned within a predefined angular range, and adjusting the alignment of the radar device in response to the vehicle height being within the predefined height tolerance and the radar device being misaligned.

Abstract: A determination of a spatial position of a transmitter which emits a wireless signal is provided. A receiver which moves relative to the transmitter receives the wireless signal and analyses a Doppler shift in the received signal. Information is generated for specifying possible spatial positions of the transmitter based on a point of time when a sign in the Doppler shift changes. In this way, a very simple and efficient determination of possible locations of the transmitter can be achieved.

Abstract: A method for localization and monitoring of living being targets in an environment comprise: transmitting (302) a sequence of radio frequency waveforms, the waveforms being a continuous-wave waveform modulated in frequency and/or phase; detecting (304) a sequence of reflected waveforms being reflected by a target and Doppler-shifted due to a movement of the target, forming (306) a sequence of waveform transforms, wherein the waveform transform comprises discretized information in a plurality of range bins, and wherein the information in a single range bin corresponds to reflections occurring at a specific sector in the environment; analyzing (308) information for a single specific sector in a sub-sequence of the sequence of waveform transforms, and determining (310) movement of a target in the specific sector based on the waveform transform information for that specific sector during a time period corresponding to the sub-sequence.

Abstract: A system and method that can determine the direction of origin within 360 degrees around an antenna array for an emitted signal with a high degree of accuracy, even when the array is installed in a corrupted or “unclean” environment. Further, the provided system and method can provide a more accurate indication of direction despite polarization of the detected signal. Finally, the provided system and method can provide accurate results from phase measurements, amplitude measurements, or both phase and amplitude measurements, from an emitted signal where a phase network can be used to tailor the amplitude and phase variations versus spatial angle to best match the receiver measurement accuracies.

Abstract: Time of Flight ranging using double-sided two-way ranging (DS-TWR) is a conventional method of ranging with ultra-wideband (UWB) radios and has been shown to have ranging accuracies on the order of tens of centimeters. This approach requires several transmissions for each range measurement, which does not scale well for multi-agent robotics because of the bandwidth needed for ranging measurements. This disclosure proposes a latent model for clock frequencies using a factor graph that enables greater consistency of clock synchronization and increases the rate of useful range measurements. This model is an effective and robust improvement to conventional DS-TWR that can leverage shared information from a network of robots. An increase in the rate of range measurements of 232% was obtained as compared to DS-TWR with the same hardware and transmission rate, and with a mean square error of range measurements of 20 cm.

Abstract: Provided are a method and device for designing and optimizing a multi-degree-of-freedom frequency-modulation (FM) signal, and a computer storage medium. The method includes that: a time domain function of the multi-degree-of-freedom FM signal is determined; the constraint condition and the objective function of multi-degree-of-freedom FM signal optimization are established; an algorithm model of augmented Lagrangian genetic algorithm is determined based on the constraint condition and the objective function; characteristic parameters of the first iteration of the algorithm model are initialized, where the characteristic parameters of the first iteration at least include the Lagrange multiplier of the first iteration and the offset of the first iteration; initialization signal of the multi-degree-of-freedom FM signal is acquired, and initialization frequency control points of the initialization signal are determined based on the initialization signal.

Abstract: An altimeter apparatus for an aircraft includes an altimeter circuit and can use a method of determining altitude. The method includes receiving a first signal in a first band via a first receive antenna, and receiving a second signal in a second band via a second receive antenna. The first band is a C-Band and the second band is at least one of a W-Band, Ku-Band, Ka-Band, V-band, or K-Band. The method also includes providing an altitude in response to the first signal or the second signal.

Abstract: A processor-implemented method in a vehicle for detecting objects from radar data includes: retrieving radar measurements taken at different periodic time increments; organizing the radar measurements into appropriate time windows; building a sequence cluster of radar measurements wherein the sequence cluster comprises a sliding window the latest time windows of radar measurements; removing noise from the sequence cluster of radar measurements by removing a cluster of radar measurements from the sequence cluster of radar measurements that is contradictory to a road topology map for an area in which the first object is estimated to be situated; and outputting the sequence cluster of radar measurements after removal of contradictory radar measurements as a new cluster of radar measurements.

Abstract: An automotive radar system comprises: a master module, a first radar module, a second radar module, and an optical waveguide arrangement operably coupling the master module to the first and second radar modules. The master module comprises an electro-optical interface device having an electrical domain side and an optical domain side. The optical domain side is operably coupled to the optical waveguide arrangement. The master module comprises a digital clock signal generator operably coupled to the electrical domain side of the electro-optical interface device.

Abstract: A wireless ranging system generates, at a first device, a first plurality of counts, each of the first plurality of counts indicative of a transmit time of a corresponding packet, and further generates a second plurality of counts, each of the second plurality of counts indicative of a receive time of a corresponding packet. In response to a number of samples of the first plurality of counts exceeding a threshold, the system generates a plurality of timestamps based on the first plurality of counts and the second plurality of counts and generates a plurality of time-of-flight values based on the plurality of timestamps. Based on a combination of the plurality of the time-of-flight values, the wireless ranging system generates an effective time-of-flight value and identifies a distance between the first device and as second device based on the effective time-of-flight value.

Abstract: A method and device for identifying radar emission modes are provided.

Abstract: A rotorcraft includes a flight control computer (FCC), a GPS receiver configured to calculate a groundspeed based on a first carrier signal, and an attitude and heading reference system (AHRS) configured to determine an acceleration of the rotorcraft. The AHRS is operable to receive an indication of the groundspeed from the GPS receiver and to calculate a velocity of the rotorcraft based on the indication of the groundspeed and the acceleration. The FCC is operable to receive an indication of the velocity from the AHRS, to generate the flight control device control signal according to the indication of velocity, and to send a flight control device control signal to one or more flight control devices.

Abstract: A satellite Automatic Identification System (AIS) for tracking maritime vessels includes a constellation of Low-Earth Orbit (LEO) satellites. Each LEO satellite includes an AIS payload for receiving AIS messages from the maritime vessels and determining therefrom reported vessel position data and satellite-based observation data. The system also includes an AIS reporting system configured to obtain the reported maritime vessel position data and satellite-based observation data from the LEO satellites over time. In addition, the AIS reporting system is configured to filter the reported maritime vessel position data and satellite-based observation data to recursively produce estimated maritime vessel positions and update the estimated maritime vessel positions for the maritime vessels.

Abstract: A detection apparatus includes: a transmitter transmitting an electric wave toward an inside of a vehicle; a receiver receiving the transmitted electric wave each time the transmitter transmits the electric wave, and performing output in accordance with reception strength of the received electric wave; and a determination portion, based on the reception strength of the electric wave received by the receiver, comparing a change mode of the electric wave received by the receiver changing over time to a predetermined reference mode and determining whether a person is present between the receiver and the transmitter.

Abstract: A radar signal processing device capable of performing a highly accurate object identification is obtained. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block, is made identical in time series in a data storage processing block; a second feature quantity is extracted by a second feature quantity extraction block; one in which an instant score is accumulated in a cycle direction to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block is calculated as an accumulation score by an accumulation/instant score calculation block; and a category of the object is determined by an object determination block on the basis of the accumulation score calculated by the accumulation/instant score calculation block.

Abstract: Disclosed herein is an antenna device that includes a substrate, an IC chip mounted on the substrate, a first antenna element including a plurality of patch antenna conductors that is supplied with power from the IC chip and that radiates a beam in a direction substantially perpendicular to the substrate, and a second antenna element that is supplied with power from the IC chip and that radiates a beam in a first horizontal direction substantially parallel to the substrate.

Abstract: A multi-mode radar antenna apparatus is provided. The apparatus includes a transmitting antenna section comprising a first plurality of transmitting antennas configured to a transmit a steerable mode signal, a second plurality of transmitting antennas configured to a transmit an imaging mode signal, and a third plurality of transmitting antennas configured to a transmit an imaging mode signal and a steerable mode signal, and a receiving antenna section comprising a plurality of receiving antennas.