Interference Alignment Algorithm for Quasi-Static MIMO Cellular System

In this paper, we propose an iterative interference alignment (IA) algorithm for quasi-static MIMO cellular networks. Such networks impose a key technical challenge in the IA algorithm design, namely the overlapping between the direct and interfering links due to the cellular topology. We shall address this challenge and propose a three stage IA algorithm. As illustration, we analyze the achievable degree of freedom (DoF) of the proposed algorithm for a symmetric MIMO cellular network. The derived DoF bound is also backward compatible with that achieved on K-pair MIMO interference channels.