Patent ID: 8787484

Claim:
A method for deciding a precoding vector of coordinated multi-point transmission (CoMP) for at least one user equipment in a network, comprising: receiving channel state information for CoMP from the user equipment, wherein the channel state information includes inter-cell correlation property between a serving cell serving the user equipment and a cooperating cell for CoMP, wherein the inter-cell correlation property is represented by a cross-correlation channel matrix which is obtained by correlation between a first transmit channel matrix from the serving cell to the ,equipment and a second transmit channel matrix from the cooperating cell to the user equipment, and wherein a precoding matrix index (PMI) for the serving cell and the cooperating cell is selected by the user equipment with a joint channel matrix and a joint correlation matrix, wherein the joint channel matrix is constructed b the first transmit channel a matrix from the serving cell to the user equipment and the second transmit channel matrix from the cooperating cell to the user equipment; and the joint correlation matrix is constructed by the cross-correlation channel matrix, the first auto-correlation channel of the serving cell and the second auto-correlation channel matrix of the cooperating cell; and deciding the precoding vector of CoMP based on the channel state information.