The present invention relates to a method and system of locating a wireless device using received signal strengths. The method comprising: determining a plurality of multiple sets of transmit beamforming weights corresponding to a plurality of access points (APs) associated with a plurality of time slots; transmitting a signal using said each of said plurality of multiple sets of transmit beamforming weights associated with said plurality of time slots by said each access point (AP) of said plurality of access points (APs); and generating a plurality of received signal strengths corresponding to said plurality of time slots associated with said each of said plurality of multiple sets of transmit beamforming weights by said each access point (AP) of said plurality of access points (APs) at any location.

A radio wave incoming direction estimation apparatus according to an aspect of the present invention estimates an incoming direction of an incoming radio wave reaching an array antenna apparatus including a plurality of antennas. The radio wave incoming direction estimation apparatus includes a virtual current calculator, and an incoming direction estimator. The virtual current calculator calculates a virtual current at each antenna from a received current that is generated at each of the antennas by the incoming radio wave on the basis of data indicating a relationship between supplied power to each of the antennas and a current that is generated at each of the antennas by the supplied power. The incoming direction estimator estimates the incoming direction of the incoming radio wave on the basis of the virtual current at each of the antennas.

Determining a device's location in a space in real time is computing intensive. To offload some of the workload in conducting this hyperlocation, the access points in the network conduct some of process in determining the location of a device. The cloud determines a restricted AoA search area based on previous client locations. After this determination, a three-dimensional (3D) AoA search is conducted by each AP in the restricted area (restricted by a range of azimuth directions) for a device. Finally, each AP reports a location(s) for the device, which comprises weights for selected angular sectors. The cloud can then construct a probability heat map for location computation from the weights provided from each AP for the device.

Radiation detection arrangement and method for detection of external radiation using TADF material.

Systems of detecting high-voltage lines to guard against electrocution when using heavy machinery are disclosed. Systems of the inventive subject matter include an antenna to detect the high-voltage line, and upon detection, the system can cut power to a movement system of the heavy machinery. A manual override is provided so that a user can remove the heavy machinery from an area at risk of causing electrocution either by contact with the high-voltage line or by arcing from the high-voltage line.

Transmitter tracking systems and methods are provided that utilize a phased array antenna. With the antenna forming a beam that is pointed in a first direction for a first frequency, a plurality of radio frequency (RF) signals, each associated with different carrier frequency and produced by a first transmitter, are received. The amplitudes of the received signals are used to determine whether the beam is pointed at the first transmitter. The amplitude information can also be used to determine a direction in which to point the beam if it is determined that the beam is not pointed at the first transmitter. The systems and methods can be applied to 5G, satellite communication, or other systems incorporating a phased array antenna.

An RFID system includes multiple antennas and uses amplitude and phase information of the RFID signals received by each antenna to determine the position of RFID tags in the vicinity. More than one antenna can receive the RFID signals during a single read cycle, enabling the RFID system to operate more quickly than a system that energizes antennas separately.

An antenna apparatus 1 includes a recess 3 formed in a part of a conveyance or a building, an antenna element 4 disposed in the recess 3, and a cover or an insulating material closing a mouth 3b of the recess 3. The recess 3 includes a bottom 3a, the mouth 3b and a side wall 3c connecting the bottom 3a and the mouth 3b, a shape of the recess 3 widens from the bottom 3a toward the mouth 3b, and the bottom 3a and the side wall 3c are made of a conductor. An array antenna configured to detect an incoming direction of a radio wave is formed by a plurality of antenna elements 4.

The subject matter discloses a method to determine a relative direction of a target RF transmitter, performed by a direction finding (DF) system comprising at least a pair of antennas having an electromagnetic-absorbing material between them, comprising conducting wireless communication between the target RF transmitter and each one of the antennas of the DF system, measuring the signal strength of the target RF transmitter received at each antenna, calculating the difference between the signal strength measured at each one of the antennas in the pair, and determining a relative direction of the target RF transmitter to be is the direction of the antenna within the pair of antennas in which the stronger signal was measured.

A determination of an angle of arrival of radiofrequency (RF) radiation can be made using compressive sensing techniques to inform a receiver portion of a radar system using fewer measurements and samples of the received signal. A method for compressive sensing at an array antenna includes forming a plurality subarrays of array elements from the array antenna such that each subarray includes two or more array elements, capturing data at the plurality of subarrays of array elements, modulating phase properties of the data captured at each of the subarrays, combining the modulated data from each of the plurality of subarrays to form a measurement having phase and magnitude measurements corresponding to the combined modulated data and determining angle of arrival information for the data using the measurement matrix.