MIMO performance with inaccurate CSI

Abstract

This FYP report discusses MIMO performance simulation results using MATLAB code. Recently, the rapid development of 5G networking system attracts public attention. Millimetre-wave (mmWave) systems have high potential for 5G and high-speed wireless communication in the future. To achieve that, the technologies such as MIMO (Multiple-input Multiple-output), linear antenna array, and beamforming are critical. Linear antenna array is used to implement the MIMO, beamforming is implemented in base station and user devices. Massive MIMO uses multiple antennas to transmit data to multiple users to increase the cell capacity. Beamforming is one signal processing method used at directional signal transmission and reception. By combining elements in the antenna array at particular angle, constructive interference is approached for the target while other signals interfere with destructive interference. With this technique, signal quality and data transfer speeds are highly improved. However, some of the largest hurdles include millimetre-wave path loss, response time (Delay), user behaviours, user number, and other real-world conditions, affect the accuracy of the signal transmission, and quality of the communication. Therefore, single cellular network system is simulated in this project. During the simulation, performance is evaluated by configuring the system in different situations. The results are used to analysis how user number, signal interference, and user movement speed affect the signal to interference ratio (SIR) and suggest methods and solutions to address the problem.