A new achievable DoF region for the 3-user M × N symmetric interference channel

In this paper, the 3-user Gaussian MIMO interference channel with M antennas at each transmitter and N antennas at each receiver is considered. It is assumed that the channel coefficients are constant and known to all transmitters and receivers. A novel scheme is presented that spans a new achievable degrees of freedom region. For some values of M and N, the proposed scheme achieves higher number of DoF than those achieved by earlier schemes, while for other values it meets the best known upperbound. Simulation results are presented showing that the proposed schemes can achieve more DoF than earlier approaches.