Near Optimal Beamforming Design For Efficient Multi-user Distributed Communications

For efficient multi-user distributed communications, near optimal beamforming techniques for multiple-input single-output interference channel with correlated block fading are proposed in this paper. Main idea is to find nearly optimal beamforming vectors at the present coding block based on optimal ones at the previous coding block. Under single-user decoding and Gaussian input constraint at each receiver, without exhaustive search among all possible beamforming vectors, the proposed beamforming schemes make systematic and immediate beamforming design possible with the performance close to the optimum.