Filter design of interference alignment scheme with limited feedback for two-cell interfering MIMO-MAC

In this paper, considering a two-cell interfering MIMO multiple access channel (MIMO-MAC), we propose an interference alignment scheme with an efficient limited feedback and investigate the conditions for the antenna configuration. In addition, we characterize the interference leakage power caused by quantization error as a function of feedback bits. From simulation results, we demonstrate that the proposed scheme can provide the better sum rate performance than the existing scheme under the same number of feedback bits.