  Unmanned aerial vehicles (UAVs), also known as drones, are proliferating.
Applications, such as surveillance, disaster management, and drone racing,
place high requirements on the communication with the drones in terms of
throughput, reliability, and latency. The existing wireless technologies,
notably Wi-Fi, that are currently used for drone connectivity are limited to
short ranges and low-mobility situations. New, scalable technology is needed to
meet future demands on long connectivity ranges, support for fast-moving
drones, and the possibility to simultaneously communicate with entire swarms of
drones. Massive multiple-input and multiple-output (MIMO), the main technology
component of emerging 5G standards, has the potential to meet these
requirements.
