Wireless Systems Technologies for Present and Future Services
Takeshi Onizawa · NTT technical review · 2020
The NTT Group provides a wide variety of services to its customers, and wireless technologies have an important role in supporting these services.Various methods of using wireless services are provided according to the characteristics of the frequency bands.This article introduces research and development directions in wireless technologies for supporting wireless services in the very high frequency (VHF), ultra-high frequency (UHF), microwave, and millimeter-wave bands.We also discuss the current state and future expansion of satellite communications and wireless local area networks (LANs).