ns are enabled by the three types of capabilities of 5G, based on their requirements: eMBB: These applications encompass all sorts of ultra-broadband services such 4 K video, augmented reality and tactile Internet. These applications typically require very high bandwidth and reasonably low latency. Throughput in Gb/s is targeted. Massive MTC: These applications represent a broad general category that includes a wide range of connected devices such as meters, environmental sensors, biological sen- sors, home security systems, appliances, and industrial monitors, to name just a few. Some envision that in the era of 5G almost everything will be connected to the Internet via an umbrella of networks. Some forecasts project that in the not-too-distant future the number of such devices worldwide could be in the tens of billions. While most of the devices for these applications are not bandwidth-intensive, they require coverage depth and the ability to support a battery life of up to 10 years. Critical MTC: This category of applications includes machine-to-machine communica- tions that require ultra-low latency and extreme reliability. Examples of such applications include vehicle-to-vehicle communications for collision avoidance systems, industrial automation, and robotics. In order to support this diversity of requirements, 5G will also support a range of new tech- nologies, including technology to support a broad spectrum range. Much of the press regarding 5G emphasizes the use of centimeter and millimeter wave frequencies (largely above 24 GHz). These bands are new to mobile wireless networks, and will play an important role in 5G, especially for eMBB services. In the past, these very high-frequency bands have been off limits for mobile net- works due to their poor propagation characteristics as well as the technical difficulty of developing low-cost transceivers that can be battery operated and fit in the form factor of a handset. Fortunately, recent developments in various technologies such as phased array antennas