Relay-Aided Interference Alignment for the X Channel With Limited CSI
Interference, an inevitable consequence of communicating in the wireless medium, is a major factor that limits the data rate for wireless networks, due to the increasing number of wireless devices sharing the same spectrum. Interference alignment is shown to be a promising technique to combat interference in wireless systems. Utilizing additional signal space dimensions, e.g. those provided by multiple antennas, interference alignment can significantly improve achievable data rates by projecting multiple interfering signals into a limited amount of dimensions. In particular, interference alignment is shown to achieve the maximum degrees of freedom for various wireless network structures.