The millimeter-wave (mmWave) band will be a key component of fifth-generation (5G) wireless communication systems. This paper presents radio propagation measurements and analysis investigating the wideband directional channel characteristics of mmWave transmission for in-building and urban cellular communication systems in the 28 GHz band. Based on the measurements, we analyze and model the spatio-temporal channel characteristics such as multipath delay, angular statistics, and path loss. In particular we investigate the clustering of the multipath components, and investigate both the intra-cluster and inter-cluster distributions. Based on these investigations, we present a complete channel model suitable for system simulations in the in-building and urban environments.
- 28 GHz
- 5G cellular systems
- Millimeter wave
- omni-directional channel measurement
- spatial channel model