Performance Analysis of Large Intelligent Reflecting Surface Aided Moderate MIMO for 5G Communication

The recently completed 5G framework is the outcome of a few advanced technologies. Massive multiple input multiple output (MIMO), millimeter wave communication, and network densification are examples of these technologies. However, there are two disadvantages to this technology. (1) the lack of control over the wireless channel, and (2) the wireless interface's excessive power consumption. The concept of re-configurable intelligent reflecting surface has emerged to answer the need for green and cost-effective future cellular networks. In this study, we'll look at how using an intelligent reflecting surface (IRS) improve the performance of moderate MIMO communication in terms of the rate, SINR, energy efficiency and transmit power metrics. Despite the fact that the underlying issue is non-convexity, we use lagrangian dual transform and quadratic transform to change and rearrange the original issue. After that, active and passive beam forming improved alternatively using an alternating direction method of multiplier algorithm (ADMM). The IRS-aided system with a reasonable number of antennas at the access point (AP) outperforms the massive MIMO without IRS in terms of sum rate, SINR, energy efficiency and transmit power metrics.