Direction determining for over-the-air testing of a radio transceiver device

A processing unit for determining direction of a user equipment with respect to a base station, where the base station is configured to communicate with beams in a beam set, the processing unit comprising processing circuitry, the processing circuitry being configured to cause the processing unit to:

• obtain a vector of base station radio parameter measurements from measurements performed on a radio link between the base station and the user equipment, wherein each of the plurality of radio parameter measurements are associated with a same location of the user equipment, wherein the vector comprises a radio parameter measurement per each beam in the beam set;
• and
• determine the direction, D, of the user equipment with respect to the base station by comparing the vector of radio parameter measurements to a set of candidate direction profiles,
• where each candidate direction profile represents one candidate direction, D, of the user equipment with respect to the base station,
• where each candidate direction profile comprises a radio parameter estimate per each beam in the beam set, and
• where the direction, D, of the user equipment with respect to the base station is given by the candidate direction of the candidate direction profile that, according to a similarity measure, is most similar to the vector of radio parameter measurements.