Patent ID: 8098746

Claim:
A method of receiving data at a receiver in a closed-loop multi-antenna system, comprising: receiving a plurality of data streams from a plurality of transmit antennas of a transmitter; generating Channel Quality Informations (CQIs) of channels that carry data streams transmitted from at least two transmit antennas allocated to the receiver from the plurality of transmit antennas; and transmitting the CQIs to the transmitter, wherein the generating of the CQIs comprises: generating a channel matrix through channel estimation of the received data streams, generating a reception beamforming matrix from the channel matrix including only components of the data streams transmitted from the allocated transmit antennas, and calculating the CQIs using the channel matrix, the reception beamforming matrix, and a total Signal-to-Noise Ratio (SNR) of the received data streams obtained through the channel estimation.