Introduction to Massive MIMO and Random Access Protocol for Pilot Allocation

1Student Mtech, Department of Electronics and Communication Engineering, IGDTUW, Delhi, India 2Assistant Professor, Department of Electronics and Communication Engineering, IGDTUW, Delhi, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – This paper presents an overview of Massive MIMO (Multiple Input Multiple Output) system. It further discuss the problems present in Massive MIMO technology implementation. A detailed discussion of Pilot Contamination problem of Massive MIMO is done. Random Access protocols PRACH (Physical Random Access Channel) and SUCR (Strongest User Collision Resolution) has been studied . SUCR Protocol resolves the UE collision to a vast extent. But many other factors are there which are responsible for the failure of these protocols at some point of time. Such factors has been discussed in the paper.