Patent ID: 8599980

Claim:
A reception beamforming apparatus of a communication system supporting an orthogonal frequency division multiplexing (OFDM) using multiple antennas, the reception beamforming apparatus comprising: a weight vector calculator for calculating a transmit weight vector based on channel information and covariance matrix information about interference and noise in a time domain derived by using a signal received through the multiple antennas as an input, and for computing a receive weight vector using the calculated transmit weight vector; and a transmitter for feeding back at least one of the calculated transmit weight vector and the receive weight vector to a transmission apparatus, wherein the weight vector calculator calculates the transmit weight vector according to {circumflex over (v)}=Φ max [P s /LΣ l=0 L−1 H l H R w −1 H l ], and computes the receive weight vector according to û=Φ max [P s R w −1 Σ l=0 L−1 H l vv H H l H ], wherein Φ max [.] denotes an Eigen value corresponding to a maximum Eigen value of a matrix, P s denotes subcarrier mean power, R w represents a covariance matrix, and H l represents an l-th channel tap matrix, and L represents a number of channel taps.