An apparatus includes multiple antennas each configured to receive one or more incoming signals. The apparatus also includes at least one processing device configured to receive antenna measurements associated with the one or more incoming signals, where the antenna measurements include phase measurements associated with the one or more incoming signals. The at least one processing device is also configured to process the antenna measurements using multiple decision trees of a random forest regressor, where the decision trees are configured to generate multiple initial predictions of an angle of arrival associated with the one or more incoming signals. In addition, the at least one processing device is configured to combine the initial predictions in order to generate a final prediction of the angle of arrival associated with the one or more incoming signals.

An apparatus includes multiple antennas each configured to receive one or more incoming signals. The apparatus also includes at least one processing device configured to receive antenna measurements associated with the one or more incoming signals, where the antenna measurements include phase measurements associated with the one or more incoming signals. The at least one processing device is also configured to process the antenna measurements using multiple decision trees of a random forest regressor, where the decision trees are configured to generate multiple initial predictions of an angle of arrival associated with the one or more incoming signals. In addition, the at least one processing device is configured to combine the initial predictions in order to generate a final prediction of the angle of arrival associated with the one or more incoming signals.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

A geolocation system for efficiently reconstructing and geolocating signals collected in multiple spatially-distributed sensors using a plurality of different Nyquist-folding samplers operating at sub-Nyquist rates. The sensors use Nyquist-folding with a plurality of sampling rates and patterns to reduce the volume of data transmitted off the sensor while retaining the ability to detect weak signals, and produce high-quality signal reconstructions and geolocations. The ambiguities in signal reconstruction introduced by sub-Nyquist sampling are addressed by using spatial consistency computed from sub-Nyquist geo-observables to assist in RF ambiguity resolution. The result is a system that simultaneously computes signal geolocations, resolves RF ambiguities, and improves signal reconstruction over the current state of the art.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

An electronic device may use information about the location of nearby devices to make sharing with those devices more intuitive for a user. The electronic device may include control circuitry, wireless circuitry including first and second antennas, and motion sensor circuitry. The control circuitry may determine the location of a nearby electronic device by calculating the angle of arrival of signals that are transmitted by the nearby electronic device. To obtain a complete, unambiguous angle of arrival solution, the electronic device may be moved into different positions during angle of arrival measurement operations. At each position, the control circuitry may calculate a phase difference associated with the received signals. Motion sensor circuitry may gather motion data as the electronic device is moved into the different positions. The control circuitry may use the received antenna signals and the motion data to determine the complete angle of arrival solution.

There is provided a system and method of detecting a direction of arrival of one or more target signals using an antenna array, the method comprising, i) generating a map representing a ratio of a co-polarization (Co-pol) pattern received by the first beam to a cross-polarization (X-pol) pattern received by the second beam; ii) obtaining Co-pol and X-pol signal strengths of the one or more target signals received by the first and second beams in step (i); iii) obtaining the Co-pol to X-pol ratio of each of the one or more target signals; iv) normalizing the generated map; v) normalizing the Co-pol to X-pol ratios of the one or more target signals; and vi) for each target signal: finding area(s), within the normalized generated map, which substantially match the normalized Co-pol to X-pol ratio of the target signal; and identifying said area(s) of the normalized generated map as potential direction(s) of arrival of the target signal.

There is provided a system and method of detecting a direction of arrival of one or more target signals using an antenna array, the method comprising, i) generating a map representing a ratio of a co-polarization (Co-pol) pattern received by the first beam to a cross-polarization (X-pol) pattern received by the second beam; ii) obtaining Co-pol and X-pol signal strengths of the one or more target signals received by the first and second beams in step (i); iii) obtaining the Co-pol to X-pol ratio of each of the one or more target signals; iv) normalizing the generated map; v) normalizing the Co-pol to X-pol ratios of the one or more target signals; and vi) for each target signal: finding area(s), within the normalized generated map, which substantially match the normalized Co-pol to X-pol ratio of the target signal; and identifying said area(s) of the normalized generated map as potential direction(s) of arrival of the target signal.