Better spectral efficiency of device to device underlying massive multi-input multi-output using receiver filter algorithm and power control model

摘要

Benefits of device to device (D2D) underlying massive multi-input multi-output (MIMO) cellular networks are noticeable in the fifth generation (5G) of mobile broadband networks. However, the interference of such coexistence from massive MIMO and D2D, due to resource sharing between cellular users and D2D users, should be decreased. Because of this issue, the spectral efficiency of such networks will be reduced. The challenges of such networks are to control the transmit power of their users and to mitigate cellular-to-D2D and D2D-to-cellular interferences. In this paper, we introduce two techniques to enhance the performance of these systems. Since, we propose a linear receiver filter with a special structure in such coexistence network to increase intended signal and then to increase spectral efficiency. Also, in this research, to decrease the whole interference, by explaining power sets for cellular and D2D transmitter for various distance intervals, we apply an open loop power control approach in the uplink as a suboptimal solution. This solution is a closed-form solution and is often more useful and take lower time than the optimal solution. Also, we analyze spectral efficiency for the cellular uplink of such networks with the proposed frameworks. Numerical results approve that the two proposed techniques decrease the interferences. Simulation results demonstrate an enhancement in the cellular spectral efficiency.