Аннотация
This paper proposes a non-iterative interference alignment (IA) scheme for the three-user MIMO X-channel network without symbol extension. We first demonstrate the basic principle of how to design the beamforming (BF) matrices for the set-up, then the achievable sum rate is estimated under perfect and imperfect channel state information (CSI). It will be shown that this scheme can achieve over 64 bits/s/Hz. Finally, we also derive its computational complexity.