PERFORMANCE ANALYSIS AND COMPARISON OF LINEAR PRECODING TECHNIQUES IN MASSIVE MIMO UNDER DIFFERENT FADING CHANNEL

Abstract

Wireless communication and its featuring technology is continuously moving forward because of high demand in wireless communication services. Precoding techniques are very important in future telecommunication technology because in order to increase data rate the simplest method is increasing bandwidth. This method is difficult, because of scarcity in radio-frequency spectrum therefore, research over the last ten years has been focused towards improving spectral efficiency, so that higher data rates can be achieved with in a given band width for all above mentioned scenarios M-MIMO gives practical solution. Massive MIMO technology is now attracting attention of both academic and industry. This motivates us to work on this topic. Most of the studies considered the uplink performance. Here, we study massive MU-MIMO for down-link system with linear precoding. We deliberate the system performance when the number of antennas and the number of users are large. Our area of interest in this work focus on performance analysis and comparison of transmitter precoding so, it is very much essential to know all the aspects of precoding techniques. The main objective of this thesis is to analyze and compare the performance of linear precoding schemes in massive MIMO under Rayleigh fading channel and Rician fading channel. The performance Analysis and comparison issues include number of base station antenna, number of users, signal to noise ratio and Spectral efficiency under both complete and incomplete channel state information at the transmitter (CSIT) using MATLAB software. Finally from this thesis work it was observed that as the number of users increases the mathematical complexity of SINR and spectral efficiency increases for all MF, ZF and RZF linear precoding schemes. Generally, in thesis work it is observed that ZF gives better performances at all transmission power and in an increasing number of BS antenna over RZF and MF in both perfect and imperfect channel state information under Rayleigh and Rician fading channel.