Exploiting Interactions of Multiple Interference for Cooperative Interference Alignment

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 identical transmitter a common destination, IA not applicable under one-DoF cost constraint. If these interfering signals in same direction interfered receiver, they will also overlap with each other intended becoming indistinguishable. Moreover, realized by adjusting spatial feature disturbance, incurring co-channel transmission-pair’s own communication. To solve this problem, we propose cooperative IA . Instead characteristics all interferences, aim achieve interferences’ strength along or none interference’s signature, based on interactions among wireless disturbances. We two cooperative schemes: space-power adjustment power adjustment. first method, overall effect orthogonal respect desired signal receiver. This method modifies properly designed precoding vector via allocation. Under second scheme, modified so that transmission while guaranteeing orthogonality Our theoretical analysis in-depth simulation have shown proposed schemes can effectively manage source achieving good performance transmission-pair.