Millimeter-wave plays an indispensable role in the new generation of
mobile communication because of its abundance of unexplored resources, which can be
used to meet the requirements of greater bandwidth and ultra-high data rate. This
chapter firstly introduces the development, characteristics, and applications of
millimeter-wave. Then the application of millimeter-wave in mobile communication
systems is described in detail, and the common channel model is listed. Secondly, a
large-scale MIMO system, precoding technology, and three kinds of beam forming
structures are introduced. Finally, combined with the current development of mobile
communication, the requirements on the millimeter-wave devices for the new
generation of mobile communication system are summarized, and some typical
millimeter-wave devices are listed.
Keywords: Backhaul, Channel model, Millimeter wave, Propagation model,
Wireless communication, Wireless network.