Research On Interference Cancellation In Massive MIMO Aided Heterogeneous Networks

The heterogeneous networks equipped with massive MIMO system will play an important role in the next-generation cellular network.This can meet the requirement of the booming data rate from the new service and user equipment.The next-generation cellular network will have more base station and low power nodes.The network will be more complex and the system will face the interference problem.This paper mainly researches on the interference cancellation scheme to enhance the system performance of the next-generation cellular network.First,this paper introduces an interference cancellation scheme based on the precoding technology.This scheme comes up with a light-weight CSI acquisition and a refined precoding algorithm.It can be used with the traditional linear precoding algorithm,eliminating the interference between the different layers and within the same layer.Second,this paper conducts with an interference cancellation scheme based on the beamforming technology.This scheme takes the advantage of the massive antenna array.It can manipulate the shape of the beamforming and construct a 3D channel model.The base station can control the direction and transmit the signal to the wanted user terminal,without any interference between the users.In the end,this paper simulates the performance at the 5G platform.The simulation results show that the proposed precoding scheme based on the null-space projection can reduce the total power and eliminate the interference of the system.The SINR of the users rises by 20 percent and the power consumption reduces by 30 percent.The simulation results indicate that the proposed scheme can significantly reduce the interference between the hetnet network and the rate of the system rise by 60 percent.