A radio beacon system configured to assist autonomous flight of one or more unmanned aerial vehicles (UAVs), wherein the radio beacon system comprises:a drone device (200), configured to be installed on an UAV and including a radio transceiver, anda radio beacon device (100), configured to be installed on ground and including N antenna arrays (110, 120) with N2, one or more radio transceivers configured to communicate with the radio transceiver of the drone device (200), and at least one processing unit (130), wherein each antenna array (110, 120) has M antenna elements (115, 125) with M2 associated to respective beamforming electronic weights w(n, m), with n ranging from 1 to N and m ranging from 1 to M, wherein said at least one processing unit (130) is configured to perform an adaptive beamforming method for assisting autonomous flight of the UAV.

The invention relates to a method and a system for aircraft navigation along a predetermined airway, including an on-board navigation system supplying a positioning integrity of the aircraft during flight relative to said airway respecting an expected position precision performance level, and at least one on-board radio receiver on the aircraft suitable for communicating with at least one land-based radio beacon suitable for supplying a distance of the aircraft relative to said radio beacon. The system includes a module configured to obtain, from a current position of the aircraft and stored data, a tuple of radio beacons to be used, a module configured to obtain a distance measurement of the aircraft relative to each of the N radio beacons of said tuple, a module configured to compute an integrity position from distance measurements obtained by a predetermined computing method, and a module configured to use the computed integrity position as current integrity position.

A method for determining the relative angular direction between a target and a transmitter. A generation of one or more light beams at the transmitter comprises diffracting broadband light in such a way that different optical frequency wavelengths are diffracted differently and a relative angular direction is detected by reading the optical frequency wavelength. A system is provided for determining the relative angular direction between a target and a transmitter and a system is provided for determining a relative position between a target and a transmitter in an area, wherein relative position is defined by the parameters: relative angular direction (1, 2), and distance.

The disclosure is directed to systems and methods for collision avoidance of aerial vehicles. More particularly, the disclosure is directed to systems and methods for avoiding collisions between manned aerial vehicles and unmanned aerial vehicles. The unmanned aerial vehicle includes a low power RF beacon which transmits signals over a predefined frequency monitored by manned aerial vehicles.

The disclosure is directed to systems and methods for collision avoidance of aerial vehicles. More particularly, the disclosure is directed to systems and methods for avoiding collisions between manned aerial vehicles and unmanned aerial vehicles. The unmanned aerial vehicle includes a low power RF beacon which transmits signals over a predefined frequency monitored by manned aerial vehicles.

A system and method for deterring animals, such as pets, from entering, getting onto, or being in certain defined zones/locations created by a user. The pet monitoring system includes a smart collar configured to communicate with a plurality of powered transceivers/transmitters, particularly Bluetooth transmitters and transceivers. Each of the transceivers or transmitters has a unique ID associated with it. The smart collar, a smartphone or other wireless communicating device can read and record the signal strength of each of the transmitters at various locations and use that information to create prohibited zones that can be downloaded onto the smart collar. The smart collar can also contain a stimulus emitter for providing a warning to the animal and a communication device configured to alert the owner.

The present disclosure generally pertains to systems and methods for autonomously detecting and correcting anomalies in position information provided to aircraft using radio-frequency signals. By enabling autonomously detecting and correcting for anomalies in the operation of a ground-based solution entirely independent of GPS, systems of the present disclosure can make the provided position information more accurate and robust, thereby enhancing the effectiveness and safety of navigation systems using the provided position information. More precisely, systems of the present disclosure may employ a series of ground-based beacon transmitters to provide radio-frequency (RF) signal pulse with a highly regular frequency. A locating receiver can detect the arrival times of these pulses and use this information to detect and report certain anomalies. These reports may then be used to autonomously correct the detected anomalies.

The present disclosure generally pertains to systems and methods for autonomously detecting and correcting anomalies in position information provided to aircraft using radio-frequency signals. By enabling autonomously detecting and correcting for anomalies in the operation of a ground-based solution entirely independent of GPS, systems of the present disclosure can make the provided position information more accurate and robust, thereby enhancing the effectiveness and safety of navigation systems using the provided position information. More precisely, systems of the present disclosure may employ a series of ground-based beacon transmitters to provide radio-frequency (RF) signal pulse with a highly regular frequency. A locating receiver can detect the arrival times of these pulses and use this information to detect and report certain anomalies. These reports may then be used to autonomously correct the detected anomalies.

A method of validating ADS-B is described herein. The method includes receiving, from time synchronized vehicles, ADS-B data (identifier, horizontal position information, and altitude information for a first vehicle) with a timestamp (defining a time of reception of the ADS-B message). The method includes receiving, from each vehicle, a determined position at the time of reception of the ADS-B message. The method includes determining differences in time of arrival for the ADS-B message to each vehicle, extracting altitude information from the ADS-B data, and determining an estimated horizontal position of the first vehicle based on the differences in time of arrival, the determined positions received from each vehicle, and the extracted altitude information. The method includes determining whether the horizontal position information in the ADS-B message is valid based on a comparison of the estimated horizontal position of the first vehicle and the horizontal position information in the ADS-B message.