I. Introduction
Multiple-input multiple-output (MIMO) transmission has been considered as a promising technique for future wireless cellular networks [1]. MIMO technologies exploit multiple-antenna to provide spatial degrees of freedom (DoF), diversity and multiplexing gains [2]. As a result, the MIMO technique can improve the transmission capacity and cell coverage, and reduce the bit error rate (BER) without requiring extra time or frequency resources [3], [4]. Recently, the massive MIMO transmission architecture with a large number of transmit antennas has been widely studied for the advanced fifth-generation technology [5]. The base stations (BSs) send out data streams to their multiple users in its own cell simultaneously. However, this concurrent communication will cause not only intra-cell interference but also inter-cell interference, leading to severe performance degradation.