Abstract: There is provided mechanisms for OTA based estimation of phase accuracy of a first radio transceiver device. A method is performed by a controller. The method comprises obtaining, per each position in a sequence of positions of a second radio transceiver device relative the first radio transceiver device, a phase relation estimate between transceiver branches of the first radio transceiver device. Each phase relation estimate is obtained from measurements on a signal wirelessly transmitted between the first radio transceiver device and the second radio transceiver device. The method comprises estimating an average phase relation for at least one pair of the transceiver branches of the first radio transceiver device by averaging the obtained phase relation estimates over all the positions in the sequence of positions. The phase accuracy of the first radio transceiver device is represented by the average phase relation for the at least one pair of the transceiver branches.

Abstract: A wireless communication system comprising a first network node and a wireless device is provided. The system is adapted to establish communication between the first network node and the wireless device. The device is adapted to obtain information related to a geographic location of the device, to transmit the information related to the geographic location to the network node, and to transmit a Sounding Reference Signal to the node. The node is adapted to receive information related to a geographic location of the device, and to determine an antenna configuration of the network node for communicating with the device via a directive antenna, based on the geographic location of the device. A network node is adapted to communicate with the device by the first network node, via the directive antenna, by means of the determined antenna configuration.

Abstract: There is provided mechanisms for OTA estimation of an RF parameter of a radio transmitter. A method is performed by a measurement equipment. The method comprises obtaining information of spatial radiation pattern used by the radio transmitter and power allocation used by the radio transmitter for transmission of a signal using the spatial radiation pattern. The method comprises obtaining a measurement of at least one of signal power and signal frequency of the signal as transmitted from the radio transmitter by measuring on the signal. The measurement is made with respect to spatial orientations and distance between the radio transmitter and the measurement equipment. The method comprises estimating the RF parameter for the signal transmitted by the radio transmitter from the measurement and using the information of spatial radiation pattern, power allocation, and spatial orientations and distance.

Abstract: The present disclosure relates to a system (1) for measurement of antenna alignment of an array antenna system (2) used for wireless communication. The array antenna system (2) has an antenna position (A) relative a first coordinate system (18) and comprises a control unit (3) and an array antenna (4) having an antenna aperture plane (19), a certain coverage (5) and an initial array antenna orientation (B). The array antenna (4) further comprises a plurality of antenna elements (6) and at least two antenna ports (7, 8, 9, 10), each antenna port (7, 8, 9, 10) being connected to a corresponding subarray (11, 12, 13, 14), each subarray (11, 12, 13, 14) comprising at least one antenna element (6). The system (1) comprises the array antenna system (2) and an unmanned aerial vehicle (15), UAV, arranged to be deployed in the coverage (5) and comprising a UAV antenna arrangement (16) and a positioning module (17) that is adapted to provide UAV position information (C) relative the first coordinate system (18).

Abstract: The present disclosure relates to a wireless communication system (3) comprising a first network node (1) and a wireless device (2) and is adapted to establish communication between the first network node (1) and the wireless device (2). The 5 wireless device (2) is adapted to obtain information related to a geographic location of the wireless device (2), to transmit the information related to the geographic location to the first network node (1), and to transmit a Sounding Reference Signal, SRS, to the first network node (1). The network node (1, 10) is adapted to receive information related to a geographic location of the wireless device (2), and to determine an antenna configuration of the first network node (1) for communicating with the wireless device (2) via a directive antenna (4), based on the geographic location of the wireless device (2).

Abstract: A method (20) of calibrating an antenna system (10) comprising a number of antenna elements is provided.

Abstract: A method (20) of calibrating an antenna system (10) comprising a number of antenna elements is provided.

Abstract: A method of calibrating an antenna system comprising a number of antenna elements is provided. The method comprises transmitting and measuring at least for first and second reference antenna elements, thereby obtaining first and second sets of corresponding number of measurement values; calculating, for a first type of beamforming and for each calibration antenna element j a correction value—?Rijk,Type 1, thereby obtaining a first part of a correction matrix; calculating, for a second type of beamforming and for each branch j a correction value ?Ri,jType 2, thereby obtaining a second part of the correction matrix; performing an optimization procedure using as input the correction matrix thereby obtaining, for each row of the correction matrix, a respective optimized constant, and calculating a compensation value ?ri for each antenna element based on the respective optimized constant.

Abstract: A method of calibrating an antenna system comprising a number of antenna elements is provided. The method comprises transmitting and measuring at least for first and second reference antenna elements, thereby obtaining first and second sets of corresponding number of measurement values; calculating, for a first type of beamforming and for each calibration antenna element j a correction value—?Rijk,Type 1, thereby obtaining a first part of a correction matrix; calculating, for a second type of beamforming and for each branch j a correction value ?Ri,jType 2, thereby obtaining a second part of the correction matrix; performing an optimization procedure using as input the correction matrix thereby obtaining, for each row of the correction matrix, a respective optimized constant, and calculating a compensation value ?ri for each antenna element based on the respective optimized constant.

Abstract: The present invention relates to a method, node and system for efficient handling of sharing a set of data and in particular where the data set is shared in a volatile manner. Each node with access to the data set sharing group controls the access of data set from the node and each node stores data set received from other nodes in the group in a volatile manner providing removal of data set received from a node that has left the sharing group.

Abstract: The present invention relates to a method, node and system for efficient handling of sharing a set of data and in particular where the data set is shared in a volatile manner. Each node with access to the data set sharing group controls the access of data set from the node and each node stores data set received from other nodes in the group in a volatile manner providing removal of data set received from a node that has left the sharing group.