An interference suppression scheme using distributed precoding with multi-cell cooperative power allocation

This paper proposes a novel cooperative power allocation (PA) scheme for multi-cell cellular systems employing distributed precoding which is designed by maximizing virtual signal-to-interference-and-noise ratio (VSINR) to suppress inter-cell interference. The base stations (BS) from all the cooperated cells serve all users within these cells. Each base station is assumed to know only channel state information (CSI) of its own users, meaning that BSs do not share CSI with each other. The proposed PA scheme is done by comparing channel gains with given thresholds. The channel whose gain is smaller than the threshold will be shut down, otherwise it will be allocated averagely among all BSs. Simulation results show that system with the proposed scheme performs better than that without BS cooperation. The proposed PA scheme offers another degree of freedom improving system capacity.