Coordinated Beamforming of CoMP with Limited Feedback

The performance of LTE-Advanced systems which is based on orthogonal frequency division multiplexing (OFDM) is significantly restricted by inter-cell interference(ICI). Advancing the performance of cell edge users who experienced strong ICI is still a crucial issue. Therefore Coordinated Multi-Point transmission/reception (CoMP) is brought forward to solve this problem. In this paper, it focused on the downlink coordinated beam forming of CoMP with limited feedback, and proposed a method based on signal-to-leakage-and-noise ratio (SLNR) and Signal Noise Ratio (SNR) criteria to choose the optimal beam forming vector from codebook, which made the user to possess higher throughput and produce less interference to other users located in coordinated cells. Simulation results indicate that the proposed method gives an effective control of ICI and improves cell edge user throughput.