Patent ID: 7532911
Filing Date: 2009-05-12
Classification: H04B

Abstract:
1. A transmission method based on random beamforming in a communication system with a base station for transmitting a signal using at least two transmit antennas, and a plurality of mobile stations for receiving the signal using at least two receive antennas, the method comprising the steps of: receiving information about channel-by-channel transmission rates from the plurality of mobile stations; allocating resources of different channels to at least two mobile stations on a basis of the received transmission rates during a unit time; and transmitting a signal through allocated channel resources based on random beamforming, wherein random beamforming is a transmission scheme in which multi-user diversity and scheduling are combined, and wherein the transmission rates are computed using a Signal to Interference plus Noise Ratio (SINR), and the SINR is computed using a parameter representing a Minimum Mean-Square Error (MMSE) filter of each of the mobile stations, and a weight vector, arbitrarily generated from the base station, multiplied by a transmission vector and a channel matrix.