We investigate the optimality of linear interference alignment (allowing symbol extensions) for 3-user MT × MR MIMO interference channel where MT and MR denote the number of antennas at each transmitter and each receiver, respectively, and the channel coefficients are held constant. Recently, Wang et al. have conjectured that interference alignment based on linear beamforming using only proper ...

In this paper, the problem of designing transmit and receive matrices is concerned in the constant MIMO interference channel. We introduce a weight in a distributed interference alignment algorithm which plays a role of adjusting interference from unintended transmitters. Then, we will further reduce the interference through “rotation” operation. The simulations show that the sum-rate of propos...