A closed-loop signalling method controls multiple transmit beams. The method also includes transmitting a plurality of beams from a first
transceiver via a plurality of transmission channels to a second
transceiver, evaluating, at the second
transceiver, characteristics of the plurality of transmitted beams received at the second transceiver. The method also includes deriving, at the second transceiver,
beamforming information for being fed back from the second transceiver to the first transceiver based on the evaluated characteristics. The
beamforming information is
usable for controlling, at the first transceiver, the transmitting of the plurality of beams. The method also includes selecting, at the second transceiver, at least one set of
beamforming information for being fed back from the second transceiver via a feedback path to the first transceiver. The method also includes calculating, at the first transceiver, additional beamforming information which was not contained in the feedback path, based on the beamforming information being fed back.