acl.01.2017.04.07

Full-duplex systems have been proposed as a key technology of fifth generation (5G) mobile communications .For the first time this paper proposes an interference cancellation scheme by interference alignment to eliminate the self-interference and mutual interference of full-duplex interference channel.The majority of existing work focuses on the suppression of self-interference without considering the effect of mutual interference, so this paper presents an interference cancellation scheme to suppress the self-interference and mutual interference at the same time. In the scheme, the full-duplex channel with self-interference and mutual interference (the original model) is treated as a MIMO channel model with mutual interference (the equivalent model). Firstly, this paper introduces the channel matrix of the corresponding relationship between the equivalent model and the original model. Secondly, based on the corresponding relationship, iterative interference alignment algorithm and maximum signal to interference plus noise ratio algorithm are used to eliminate the self-interference and mutual interference. Finally, we simulate the capacity and average energy efficiency. The simulation results show that the capacity and average energy efficiency are more improved obviously by this scheme than other schemes.