There is provided mechanisms for estimating angle of arrival of a radio signal in a radio communications network. A method is performed by a receiving radio transceiver device. The method comprises obtaining measurements of the radio signal as received in two receive beams covering a given angular sector. The two receive beams are created by analog beamforming in an antenna array. The receive beams have different complex beam patterns and at any angle within the given angular sector at most one of the complex beam patterns has gain below a threshold. The method comprises estimating the angle of arrival of the radio signal by comparing a complex amplitude of the measurements in the two receive beams to a discriminator function.

The present invention discloses an information processing method, an electronic device and a computer storage medium. The method is applied to a mobile electronic device, the electronic device is provided with an image collection unit, the image collection unit can carry out image collection, and the method includes: acquiring a first instruction, wherein the first instruction is used for indicating to carry out image collection based on target tracking; responding to the first instruction, and acquiring position information between a target object and the electronic device; acquiring a first parameter according to the position information, and controlling a movement state of the electronic device according to the first parameter, so that the electronic device tracks the target object, wherein the first parameter is a parameter used for controlling the movement state of the electronic device; and acquiring a second parameter according to the position information, and controlling an image collection posture of the image collection unit according to the second parameter, so that the image collection unit can acquire an image satisfying a first condition in a process when the electronic device tracks the target object.

A combined electro-mechanical adaptive antenna tracking system for wireless communication between transmitters and receivers moving relative to each other is described. This system enables one or more antenna transceivers on a moving object, such as a high altitude unmanned aerial vehicle (HALE UAV), to simultaneously track one or more separate antenna transceivers on the ground, such as multiple customer premises equipment. The antennas on the moving object are constructed with multiple-subsection phased arrays or may have multiple horns on one rotation axis. Adaptive tracking control logic is applied to synchronize electrical switch and/or mechanical rotation and electrical beamforming for the moving transceivers to track multiple ground transceivers. In one advantageous aspect, an off-the-shelf horn antenna can be used and rotated around only one axis, thereby eliminating the need for expensive two dimensional movement actuators such as gimbals and the need for tracking multiple ground based receivers.

Provided herein is a compact and economical direction finding antenna using a mono-pulse antenna system, where a plurality of antenna elements are disposed in a circular array. The directional antennas may be formed by any type of antenna element, including a patch or reflector. The antenna beams of the directional antenna elements overlap, so that from any azimuthal direction, the point is covered by more than one antenna beam. Signals from each pair of adjacent antenna elements of the circular array are processed in order to determine the angle of arrival of a received signal.

Systems and methods are provided for determining a direction of a signal received at an antenna array. An antenna array includes a plurality of antenna elements, including a reference element. A signal combiner element is configured to combine weighted signals from a subset of the plurality of antenna elements to provide a composite output. An adaptive processing component is configured to determine an optimal set of weights for the subset of the plurality of antenna elements. An angle of arrival search component is configured to find a direction of minimum gain given the optimal set of weights.

A combined electro-mechanical adaptive antenna tracking system for wireless communication between transmitters and receivers moving relative to each other is described. This system enables one or more antenna transceivers on a moving object, such as a high altitude unmanned aerial vehicle (HALE UAV), to simultaneously track one or more separate antenna transceivers on the ground, such as multiple customer premises equipment. The antennas on the moving object are constructed with multiple-subsection phased arrays or may have multiple horns on one rotation axis. Adaptive tracking control logic is applied to synchronize electrical switch and/or mechanical rotation and electrical beamforming for the moving transceivers to track multiple ground transceivers. In one advantageous aspect, an off-the-shelf horn antenna can be used and rotated around only one axis, thereby eliminating the need for expensive two dimensional movement actuators such as gimbals and the need for tracking multiple ground based receivers.