Full-Duplex Amplify-and-Forward Receiver Cooperations for Interference Channels

In this paper, we focus on a two-transmitter and two-receiver interference channel (IC), where each transmitter sends a message to the desired receiver. Especially, the full-duplex (FD) amplify-and-forward (AF) protocol is adopted to build up the receiver cooperations. With the considered scheme, the equivalent channel model is analyzed, and the statistics of the accumulated residual interference and noise (ARIN), generated by the imperfect self interference (SI) cancellation and AF scheme, are calculated. Then, the achievable rate regions for both the single-user and joint decoding schemes are characterized by a concave-convex procedure (CCCP). Next, from the achievable rates, one-side cooperation is analyzed to explain its optimality. Simulation results show that the achievable rate regions can be improved by the proposed scheme in certain scenarios.