Abstract
In cellular system, the technique of coordinated multi-point transmission and reception (CoMP) is drawing attention for improving the capacity of cell-edge users which suffre from the severe inter-cell interference. In this report, we propose a orthogonal beamforming (BF) algorithm to achieve high capacity performance using coordinated transmission in multi-cell MIMO broadcast channel. In the proposed algorithm, the base stations initially select a user of cell-edge users, and generate the optimal BF vector for the selected user and schedule the one. At the same time, the base stations schedule the users which have high SNR to achieve high system capacity. We compare the number of feedback bits and the system capacity between the proposed method and conventional CoMP method. In the result, we show that the proposed method achieve the higher capacity of the cell-edge user while maintaining the system capacity.
