The embodiments herein relate to method performed by a measurement device, the method comprising: receiving via higher layer signalling, information on resources or resource sets of one or more radio transmission devices transmitting one or more beam signals associated with said resources or resource sets; performing channel measurements of the one or more beam signals, per spatial filter or receiver beam of the measurement device; storing, over at least one time frame, the channel measurements into measurement groups, where each measurement group corresponds to the channel measurements performed using the same spatial filter of the measurement device; and reporting the measurement groups to a network node or correlating the measurements of each measurement group with reference data for each available time frame individually and reporting the result of the correlation to the network node. The embodiments also relate to a method performed by a network node.