APPARATUS AND METHOD FOR DETERMINING BEAMFORMING VECTOR IN BEAMFORMING SYSTEM USING CODEBOOK

摘要

The present invention relates to a device and method for determining a beamforming vector in a codebook-based transmission beamforming system. Feedback method of the receiver in a codebook-based transmission beamforming system according to the present invention, by using the process for generating forthcoming channel values ​​and the forthcoming channel values ​​for a future predetermined period, using the past M number of the channel estimation value from the current codebook It includes the step of calculating effective channel gains for all transmission beamforming vectors in and the step of feeding back the codebook indices to the transmitter corresponding to the maximum value among the effective channel gains. This invention can be improved because it determines the feedback information in consideration of the time-varying channel, the link performance. ; MIMO-OFDM, transmission beamforming codebook, the two-dimensional interpolation