Combining interference alignment and Alamouti codes for the 3-user MIMO interference channel

Interference Cancellation Method without Feedback Amount for Three Users Interference Channel

“…Step 5, take operation on 1 z and 2 z to get Step e θ + j a a has a diversity gain of two, which is equal to that of [11]. Similar arguments can be used to prove that other symbols achieve a diversity of two as well.…”

“…6 independent modulated signals are sent over two time slots in [11]. Feedback information, namely 16 complex numbers, are required at the transmitters, which occupy 16/3 time slot if these three receivers adopt the same transmission and the same code mode as the transmitters.…”

“…Then, multi-user interference is cancelled by a linear operation on the received signals. The transmission efficiency of the proposed scheme is higher than that of [11]. Theoretical analysis shows that the diversity of the proposed scheme is the same as that of [11].…”

“…The multiuser interference is mitigated through interference alignment and linear operation on the received signals. Motivated by [9], interference alignment and Alamouti code are introduced into MIMO interference channel with three transmitter-receiver pairs [11]. The multi-user interference is mitigated through interference alignment and unidirectional cooperative link.…”

Improved Interference Cancellation Scheme for <i>X</i> Channels with Four Antennas

“…Interference alignment aligns the interference signals along the same subspace while the wanted signals occupy linearly independent signal dimensions, such that the wanted signals can be separated [7] [8]. Later, interference alignment and space-time code are combined to obtain diversity gain [9] [10]. two users MIMO X channels, in which multi-user interference is eliminated by interference alignment and linear processing at the receivers [11].…”