A method for operating a reception point, the method comprising: receiving , by the reception point, a plurality of first directional reference signals spanning a first plane, wherein the received first directional reference signals are individually beam-formed channel state information reference signals, CSI-RSs, transmitted with different angles; selecting , by the reception point, at least one first directional reference signal from the plurality of received first directional reference signals that meets a first selection criterion; sending , by the reception point, a first feedback indicating the selected at least one first directional reference signal; characterized in that the method further comprises: receiving , by the reception point, a plurality of second directional reference signals spanning a second plane oriented in accordance with the selected at least one first directional reference signal, wherein the received second directional reference signals are individually beam-formed CSI-RSs transmitted with different angles; selecting , by the reception point, at least one second directional reference signal from the plurality of received second directional reference signals that meet a second selection criterion; and sending , by the reception point, a second feedback indicating the selected at least one second directional reference signals; wherein the first plane is a first one of an azimuth plane and an elevation plane and the second plane is a second one of the azimuth plane and the elevation plane. receiving , by the reception point, a plurality of first directional reference signals spanning a first plane, wherein the received first directional reference signals are individually beam-formed channel state information reference signals, CSI-RSs, transmitted with different angles; selecting , by the reception point, at least one first directional reference signal from the plurality of received first directional reference signals that meets a first selection criterion; sending , by the reception point, a first feedback indicating the selected at least one first directional reference signal; characterized in that the method further comprises: receiving , by the reception point, a plurality of second directional reference signals spanning a second plane oriented in accordance with the selected at least one first directional reference signal, wherein the received second directional reference signals are individually beam-formed CSI-RSs transmitted with different angles; selecting , by the reception point, at least one second directional reference signal from the plurality of received second directional reference signals that meet a second selection criterion; and sending , by the reception point, a second feedback indicating the selected at least one second directional reference signals; wherein the first plane is a first one of an azimuth plane and an elevation plane and the second plane is a second one of the azimuth plane and the elevation plane. receiving , by the reception point, a plurality of second directional reference signals spanning a second plane oriented in accordance with the selected at least one first directional reference signal, wherein the received second directional reference signals are individually beam-formed CSI-RSs transmitted with different angles; selecting , by the reception point, at least one second directional reference signal from the plurality of received second directional reference signals that meet a second selection criterion; and sending , by the reception point, a second feedback indicating the selected at least one second directional reference signals; wherein the first plane is a first one of an azimuth plane and an elevation plane and the second plane is a second one of the azimuth plane and the elevation plane. <EOS>