Figure 1From: Orthogonal beamforming using Gram-Schmidt orthogonalization for multi-user MIMO downlink systemSum capacity of the proposed method for different number of codebook size, Q CSI ={ 5, 10, 15, 20, analog CSI}, for an increase of users, the number of transmit antenna is N t = 4, SNR is 5 dB and the initially selected user is S = 1.Back to article page