Interference Alignment With Cyclic Unidirectional Cooperation

Breaking the interference barrier has been set to be a major challenge in fulfilling the demands for high spectral efficiency in the future generations of wireless cellular networks. Recently, the concept of Interference Alignment (IA) was initially introduced in the context of MIMO X-channel. Then, the IA concept was further developed in by finding an information theoretic upper bound on the multiplexing gain or the number of Degrees of Freedom (DoF) of K- user Interference Channel (IC) with channel extension.