Nowadays, providing higher data rate is a momentous goal for wireless communications systems. Interference is one of the important obstacles to reach this purpose. Interference alignment is a management technique that align interference from other transmitters in the least possible dimension subspace at each receiver and as a result, provide the remaining dimensions for free interference signal...

Wireless networks are usually deployed to cover more overlapping areas, experiencing severe interferences and hence making interference management essential for their viability. Interference alignment (IA) is an effective way of has thus received significant attention. With IA, at least one degree-of-freedom (DoF) should be used place the aligned interferences. However, when multiple from ident...

—Interference alignment in cognitive networks is an efficient way to achieve the cognitive system throughput gain without degrading the throughout of the primary system. In this paper a novel interference management strategy is presented to use interference alignment in cognitive heterogeneous networks flexibly. Characteristics of interference distribution in twotiered networks are considered ...