Signals and Telecommunication Journal Vaina Malar Panneer Selvan, Muhamad S. Iqbal, Hamed Al-Raweshidy 4 2 2015 http://www.dline.info/stj/fulltext/v4n2/v4n2_3.pdf Currently, Multi-user Multiple-In Multiple-Out (MU-MIMO) systems are used in new generation wireless technologies. The numbers of users and applications increase rapidly owing to ongoing improvement in wireless technology. At the same time, wireless communication need the high data rate and link reliability. Therefore, MU-MIMO improvements have to consider 1) providing the high data rate and link reliability, 2) support all users in the same and frequency resource, and 3) using low power consumption. In reality, inter-user interference has a strong impact when more users access the wireless link. Complicated transmission techniques such as interference cancellation are used to maintain a given desired quality of service. Due to these problems, MU-MIMO systems with very large antenna arrays (known as massive MIMO) are proposed. The channel vectors are nearly orthogonal, and the inter-user interference is reduced significantly with massive MU-MIMO systems. Therefore, the users can be served with high data rate simultaneously. In this paper, we focus on the performance analysis of massive MU-MIMO downlink system where the base station uses linear precoding schemes to serve many users over Nakagami-m fading channel.