A METHOD FOR SIGNALLING A PRECODING IN A COOPERATIVE BEAMFORMING TRANSMISSION MODE

The present invention relates to a method for operating a secondary station in a network, the secondary station comprising a transceiver adapted for simultaneously receiving transmissions from a primary station controlling a first cell and at least one primary station controlling a second cell, the method comprising the secondary station (a) selecting a first precoding matrix for the first cell out a primary set of precoding matrices for the first cell, (b) selecting a subset of at least one precoding matrix for the at least one second cell in dependence on the first precoding matrix, out of a set of subsets of precoding matrices for the second cell, (c) selecting a second precoding matrix for the at least one second cell out of the selected subset of precoding matrices for the second cell, (d) transmitting a first indicator representative of the first precoding matrix.