A directive direction finding apparatus may comprise: a directivity-enabled antenna array in which a constituent antenna or antenna subarray has directivity in the same direction; an RF/IF receiver connected to the directivity-enabled antenna array; a digital receiver connected to the RF/IF receiver; a direction finder connected to the digital receiver; a directivity control unit to control an operation of the directivity-enabled antenna array; and a transport/control interface connected to the direction finder and to manage control and operation of the directivity-enabled antenna array, the RF/IF receiver, the digital receiver, the direction finder and the directive control unit.

An antenna includes a core, a first loop antenna comprising a first conductive loop formed around the core, a second loop antenna comprising a second conductive loop formed around the core at a first angle relative to the first conductive loop, and a third loop antenna comprising a third conductive loop formed around the core at a second angle relative to the first conductive loop.

A method for activating a vehicle function, by an activation device including a transceiver to communicate with hands-free access equipment. The transceiver is equipped with a gyroscope and a magnetometer and two receiving antennas that have a coefficient of electromagnetic coupling between them that is below a threshold. The method includes the following steps for at least two consecutive footsteps: transmission of a signal comprising data of the gyroscope and the magnetometer of the hands-free equipment to the vehicle; comparison of the data with representative values of the gyroscope and the magnetometer of the transceiver; determination of a first direction of the user; determination of a second direction of the user based on an estimation of a first angle of arrival of the signal towards the transceiver; comparison of the first direction and the second direction; activation of the vehicle function on the basis of the result of the comparison.

A method for activating a vehicle function, by an activation device including a transceiver to communicate with hands-free access equipment. The transceiver is equipped with a gyroscope and a magnetometer and two receiving antennas that have a coefficient of electromagnetic coupling between them that is below a threshold. The method includes the following steps for at least two consecutive footsteps: transmission of a signal comprising data of the gyroscope and the magnetometer of the hands-free equipment to the vehicle; comparison of the data with representative values of the gyroscope and the magnetometer of the transceiver; determination of a first direction of the user; determination of a second direction of the user based on an estimation of a first angle of arrival of the signal towards the transceiver; comparison of the first direction and the second direction; activation of the vehicle function on the basis of the result of the comparison.

A portable multifunctional detection instrument is provided. The portable multifunctional detection instrument includes a housing. The housing is provided with a handheld part. A control circuit board is disposed in the housing. An infrared detector and a red light generator are disposed on the housing. Both the infrared detector and the red light generator are electrically connected to the control circuit board. The infrared detector is configured to detect red light emitted by a camera. The red light generator is configured to emit red light toward the camera. The control circuit board is further provided with a signal detection module to detect whether a communication signal exists around.

Systems and methods for automated unmanned aerial vehicle recognition. A multiplicity of receivers captures RF data and transmits the RF data to at least one node device. The at least one node device comprises a signal processing engine, a detection engine, a classification engine, and a direction finding engine. The at least one node device is configured with an artificial intelligence algorithm. The detection engine and classification engine are trained to detect and classify signals from unmanned vehicles and their controllers based on processed data from the signal processing engine. The direction finding engine is operable to provide lines of bearing for detected unmanned vehicles.

Systems and methods for automated unmanned aerial vehicle recognition. A multiplicity of receivers captures RF data and transmits the RF data to at least one node device. The at least one node device comprises a signal processing engine, a detection engine, a classification engine, and a direction finding engine. The at least one node device is configured with an artificial intelligence algorithm. The detection engine and classification engine are trained to detect and classify signals from unmanned vehicles and their controllers based on processed data from the signal processing engine. The direction finding engine is operable to provide lines of bearing for detected unmanned vehicles.

A node of a multi-node network includes a communications interface incorporating one or more paired antenna elements wherein a transmitter (Tx) element and receiver (Rx) element are oriented in opposing directions. The node discovers and/or links to other nodes of the network by orienting each paired antenna element to transmit to other nodes in one direction and receive in the opposing direction (e.g., through a transmit and receive region, the transmit region opposite the receive region). At subsequent time intervals (e.g., alternating with the first time interval or set thereof), the Tx antenna elements transmit in directions through the initial receive region, each transmit direction interleaved between two prior receive directions, while the Rx antenna elements simultaneously attempt to receive in opposing directions through the initial transmit region, each receive direction interleaved between two prior transmit directions.

A system comprises an array of antennas suitable for intercepting electromagnetic waves, one or more sensors, wherein said one or more sensors are configured to provide data informative of a position of each of a plurality of the antennas over time, wherein each of a plurality of the antennas is linked to a non-rigid portion, thereby undergoing displacement upon displacement of the non-rigid portion, wherein data informative of the electromagnetic waves intercepted by the array and data informative of the position of the plurality of antennas over time are usable for determining data informative of at least one of a position and a direction of at least one emitter of the electromagnetic waves.

Provided are a device and a method for estimating an angle of arrival (AoA) and an angle of departure (AoD) in a communication system having 1-bit quantization.