Mechanisms for selecting beam direction for a radio communications device are provided. A method is performed by the radio communications device. The method includes obtaining radio channel estimates of a radio channel on which radio waves have been transmitted between the radio communications device and another radio communications device at an angle of arrival and departure. The method includes determining a Doppler shift from the radio channel estimates. The method includes estimating at least one of the angle of arrival and departure of the radio waves based on the Doppler shift. The method includes selecting a beam direction for a signal to be transmitted between the radio communications device and this another radio communications device over the radio channel according to the estimated angle of arrival or departure.

Apparatus for processing a voice radio signal with a transcription unit configured to convert the voice radio signal into a text signal; an object determination unit configured to determine an object from which the voice radio signal originates; an object localization unit configured to determine position information of the object from which the voice radio signal originates; and an output unit configured to allocate the text signal to the object and to provide the same. The object determination unit is configured to determine a detection probability for at least one object whose position at least partly matches the determined position information. The object determination unit is configured to determine the object with the highest detection probability as the object from which the voice radio signal originates, or, with a very similar detection probability, to determine all objects with the similar detection probability as the object.

Apparatus for processing a voice radio signal with a transcription unit configured to convert the voice radio signal into a text signal; an object determination unit configured to determine an object from which the voice radio signal originates; an object localization unit configured to determine position information of the object from which the voice radio signal originates; and an output unit configured to allocate the text signal to the object and to provide the same. The object determination unit is configured to determine a detection probability for at least one object whose position at least partly matches the determined position information. The object determination unit is configured to determine the object with the highest detection probability as the object from which the voice radio signal originates, or, with a very similar detection probability, to determine all objects with the similar detection probability as the object.

The present disclosure describes a self-positioning system, a tracking beacon and a self-positioning method for a vehicle. The self-positioning system is configured to estimate an direction of arrival of a radio wave tracking beacon signal arriving at an antenna array of the vehicle from a non-stationary tracking beacon unit, estimate Euclidian distance between the self-positioning system and the tracking beacon unit by using wireless radio-frequency communication between the self-positioning system and the tracking beacon unit, and determine position data identifying a three-dimensional position of the self-positioning system with respect to tracking beacon unit on the basis of the estimates of the direction of arrival and the Euclidian distance.

A method and apparatus for receiving signals from an unknown transmitting source and providing the location of the unknown transmitting source comprising a series of channels for receiving signals radiated by the unknown transmitting sources, generating preprocessed time domain data and generating a SAR image depicting a location of the unknown transmitting source, and a processor for processing the preprocessed time domain data to enhance a pixel value at each pixel location within the SAR image by summing signal data from each channel related to each pixel location to generate an enhanced SAR image.

Systems and methods are provided to simultaneously determine both angle of arrival (AoA) and angle of departure (AoD) of a signal transmitted between two or more radio frequency (RF)-enabled wireless devices (e.g., such as BLE modules). The disclosed systems and methods may be so implemented in one embodiment to determine AoD even in the case where the transmitting wireless device is at the same time operating in a departure (or AoD) transmitting mode by transmitting a RF signal from multiple antenna elements of at least one switched antenna array using a given switching pattern or sequence implemented by an array switch.

Certain cellular communication systems may use beamforming to create distinct signal beams in different radial directions relative to a base station. Upon receiving a request for the location of a mobile device, a position calculation function is used to calculate the location of the mobile device based on multiple types of location-related data. The location-related data may indicate the direction of the directional signal beam that is currently being used for communications between the mobile device and a base station. The direction may be used in conjunction with other location-related data, such as distance information, to estimate the location of the mobile device.

Certain cellular communication systems may use beamforming to create distinct signal beams in different radial directions relative to a base station. Upon receiving a request for the location of a mobile device, a position calculation function is used to calculate the location of the mobile device based on multiple types of location-related data. The location-related data may indicate the direction of the directional signal beam that is currently being used for communications between the mobile device and a base station. The direction may be used in conjunction with other location-related data, such as distance information, to estimate the location of the mobile device.

Aspects of the invention are directed towards an apparatus and a method for tracking movement of one or more items. One or more embodiments of the invention describe the method comprising steps of receiving an unloading location of each of one or more items and determining a current location of a container. The method further describes steps of determining an angle of arrival and/or an angle of departure based on a signal from the one or more items and determining movement of the one or more items based on the angle of arrival and/or the angle of departure. The method also describes steps of transmitting a message to a device based on the current location of the container, the unloading location and the movement of the one or more items.

The present invention belongs to the field of array signal processing and relates to a composite tensor beamforming method for an electromagnetic vector coprime planar array. The method includes: building an electromagnetic vector coprime planar array; performing tensor modeling of an electromagnetic vector coprime planar array receiving signal; designing a three-dimensional weight tensor corresponding to a coprime sparse uniform sub-planar array; forming a tensor beam power pattern of the coprime sparse uniform sub-planar array; and performing electromagnetic vector coprime planar array tensor beamforming based on coprime composite processing of the sparse uniform sub-planar array. Starting from the principles of receiving signal tensor spatial filtering of two sparse uniform sub-planar arrays that compose the electromagnetic vector coprime planar array, the present invention forms a coprime composite processing method based on a sparse uniform sub-planar array output signal.