An Interference Alignment Algorithm for AsymmetricMIMO Two-Way Relaying Interference Channel

In this paper, we propose a simplified interference alignment algorithm based on the maximum signal to interference noise ratio (Max-SINR) algorithm for the asymmetric multi-pair two-way MIMO relaying interference channel. Then, we derive the feasibility conditions of signal alignment and interference suppression scheme in the system, so as to analyze the degree of freedom (DOF) and sum rate of the system. The relay node in this article do not have to do complex signal processing, greatly reduces the signal processing complexity of the entire system. Besides this, the proposed scheme is based on Max-SINR algorithm and provides a considerable performance gain at low and intermediate P compared with existing relay zero forcing programs. Furthermore, the brief theoretical analysis and numerical simulations have shown that the degrees of freedom (DOF) achievable by interference alignment in K user pair two-way relaying interference networks are .