The learning device learns a tracking model used for a radar device. A first acquisition unit acquires, from a radar device, a target detection information indicating a position of a target detected based on a received wave, and a track of the target calculated based on the target detection information. A second acquisition unit acquires a target position information indicating a position of the target. A learning data generation unit generates learning data using the target detection information, the track, and the target position information. A learning processing unit learns a tracking model for performing tracking processing of the target based on the target detection information, using the learning data.

A method of determining a position of an object, the method including: receiving a first signal reflected from the object using a first device, the first device a peer to peer wireless communication device, interrogating a native communication protocol on the first device to output a first angle of arrival corresponding to the angle of arrival of the first signal at the first device, using a second device remote from the first device to receive a second signal reflected from the object, the second device a peer to peer wireless communication device, interrogating a native communication protocol on the second device to output a second angle of arrival corresponding to the angle of arrival of the second signal at the second device, calculating the position of the object based on the first and second angles of arrival, wherein the first and second devices are isolated from each other.

In accordance with a first aspect of the present disclosure, a system is provided for facilitating detecting an external object, the system comprising: at least one first communication unit configured to transmit and receive one or more first signals; at least one second communication unit configured to transmit and receive one or more second signals; a controller configured to control the first communication unit and the second communication unit, wherein the controller is configured to cause the first communication unit and the second communication unit to operate concurrently and to use the first signals received by the first communication unit and the second signals received by the second communication unit while said first communication unit and second communication unit are operating concurrently for detecting the external object. In accordance with other aspects of the present disclosure, a corresponding method for facilitating detecting an external object is conceived, as well as a computer program for carrying out said method.

A method for signal evaluation in a locating system that includes multiple radar sensors whose locating ranges overlap one another. The method includes evaluating the signal of a first of the radar sensors and identifying distance cells that are not empty, for at least one of these distance cells: selecting a second of the radar sensors and determining a distance range in which the objects situated in the distance cell would have to be situated from the viewpoint of the second radar sensor, and classifying the object configuration in the distance range, based on the signal of the second radar sensor.

An aircraft includes a vessel checker, an image generator, an appearance determining unit, and an information transmitter. The vessel checker identifies a suspicious vessel candidate by comparing a marine vessel detected by a marine search radar with a marine vessel transmitting data with an automatic identification system. The image generator generates an image by photographing the suspicious vessel candidate after the aircraft approaches the suspicious vessel candidate in accordance with a route for approaching the suspicious vessel candidate. The appearance determining unit determines whether the suspicious vessel candidate in the image has an appearance characteristic of a suspicious vessel. The information transmitter transmits, to an external apparatus, information indicating that the suspicious vessel candidate has the appearance characteristic of the suspicious vessel if the suspicious vessel candidate has the appearance characteristic of the suspicious vessel.

This document describes techniques and components of a radar system with a sparse primary array and a dense auxiliary array. Even with fewer antenna elements than a traditional radar system, an example radar system has a comparable angular resolution at a lower cost, lower complexity level, and without aliasing. The radar system includes a processor and antenna arrays that can receive electromagnetic energy reflected by one or more objects. The antenna arrays include a primary subarray and an auxiliary subarray. The auxiliary subarray includes multiple antenna elements with a smaller spacing than the antenna elements of the primary subarray. The processor can determine, using the received electromagnetic energy, first and second potential angles associated with the one or more objects. The processor then associates, using the first and second potential angles, respective angles associated with each of the one or more objects.

Aspects of the present disclosure include methods, systems, and non-transitory computer readable media for transmitting at least one incident radar signal, receiving at least one reflected radar signal in response to the at least one incident radar signal reflected from a person associated with the RFID tag, determining a first movement vector of the person based on the reflected radar signal, transmitting at least one incident RFID signal, receiving at least one backscattered RFID signal from the RFID tag, determining a second movement vector of the RFID tag based on at least one phase measurement of the at least one backscattered RFID signal, and determining whether the RFID tag is associated with the person based on the first movement vector and the second movement vector.

A transponder, able to equip a cooperative target facing a Doppler radar, includes at least one receiving antenna able to receive a signal transmitted by said radar and a transmitting antenna able to retransmit a signal. The signal received by the receiving antenna is amplitude-modulated before being retransmitted by the transmitting antenna to produce a variation of the radar cross-section of the target, the variation triggering a frequency shift between the signal transmitted and the signal received by the radar comparable to a Doppler echo. The transponder applies notably to the field of radars, more particularly for collaborative systems also operating at low velocity or nil velocity. It applies for example to assisted take-off, landing and deck-landing of drones, in particular rotary-wing drones, as well as manned helicopters.

A radar is equipped with a main antenna having three radiation patterns, sum, difference and control, corresponding to the antenna, the radar comprises an auxiliary antennal device, composed of an antenna and of a rear radiating element which is situated at the rear of the antenna, fixed above the antenna and coupling means, the auxiliary antennal device: having three radiation patterns, sum, difference and control, the control pattern ensured for the direction opposite to the antenna by the rear radiating element; the antenna inclined to guarantee a maximum gain of its sum pattern in the elevational domain (60°-90°).

A system and method for a multi-panel multi-function active electronically scanned array (AESA) radar operation receives radar commands from individual aircraft systems and segments a plurality of AESA panels fixed (at variable azimuth/elevation about the aircraft) into a plurality of subarrays to carry out each individual function commanded by the individual aircraft system. Dependent on aircraft status and phase of flight, the and individual AESA are designated for use and the subarrays are sized based on desired radar function at the specific phase of flight and specific threat associated with the phase. The system dynamically shifts the designated AESA, subarray size, beam characteristics, power settings, and function to enable multiple simultaneous function of the suite of AESA panels.