A Sub 6GHz Massive MIMO System for 5G New Radio

This paper introduces a Massive MIMO system for 5G New Radio (NR). Compared with LTE, which is initially designed for a single wide beam per cell, the system in the paper is natively designed for multiple narrow beams to fully utilize the benefits of Massive MIMO. Beside Massive MIMO, other 5G features, such as wide bandwidth and low latency, introduce additional challenges to hardware implantations. A prototype based on commercial base station platform is developed to support Massive MIMO, wide bandwidth and low latency at the same time. The prototype achieved high single user and multiple users' peak data rates in the field test. The work is helpful to understand the potential challenges in 5G air interface design and demonstrate Massive MIMO can be a viable solution for 5G NR.

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