5G Enabling Technologies - MIMO, Multiuser MIMO, and Massive MIMO Slides

In this webinar, the fundamentals underlying the MIMO concept are explained. It will be shown how multiple reflections in indoor and urban environments can be effectively used to create additional independent channels that can serve the purposes of diversity and/or spatial multiplexing. Extending this concept for a base station to serve multiple users gives rise to Multiuser MIMO, in which both the number of served users and that of the array elements are very moderate. Massive MIMO on the other hand uses large antenna arrays to produce very narrow multiple beams that are capable of simultaneously establishing independent channels between the base station and a number of mobile or stationary users. The usually used deterministic and stochastic models for representing mobile wireless channels (linear time-varying systems) are explained emphasizing the massive-MIMO aspects. Sample massive-MIMO systems that have been recently developed are presented.