Abstract: The present disclosure relates to methods of controlling sending of reference signals from a wireless communication device to a radio base station, as well as a wireless communication device and a radio base station performing the methods. In an aspect, a method of a radio base station of controlling sending of reference signals from a wireless communication device is provided. The method includes determining, from an estimated characteristic of a communication channel established via each of a plurality of antennas of the wireless communication device, a measure of similarity in the estimated characteristics for at least two of the communication channels; and if the similarity exceeds a similarity threshold value instructing the wireless communication device to send further reference signals only on one of said at least two communication channels during a time period.

Abstract: A first communications device (121) for detecting disturbing sound (101) is provided, operative to acquire a first representation of sound audible in a surrounding (120) of the first communications device, acquire, from second communications devices (111-114) which are spatially separated from the first communications device, second representations of sounds audible in the surroundings (110) of the second communications devices, and determine at least one second representation of sound which represents the same sound originating from the same source of sound.

Abstract: There is provided mechanisms for beam management. A method is performed by a radio transceiver device. The method comprises obtaining an angle spread value for signal paths towards a second radio transceiver device. The method comprises performing a beam management procedure for selecting which directional beam to use for communication with the second radio transceiver device by transmitting or receiving reference signals in a candidate set of directional beams. Which directional beams to include in the candidate set of directional beams is dependent on the angle spread value by the angle spread value determining sparsity of the directional beams in the candidate set of directional beams.

Abstract: A first communications device (121) for detecting disturbing sound (101) is provided, operative to acquire a first representation of sound audible in a surrounding (120) of the first communications device, acquire, from second communications devices (111-114) which are spatially separated from the first communications device, second representations of sounds audible in the surroundings (110) of the second communications devices, and determine at least one second representation of sound which represents the same sound originating from the same source of sound.