A Survey of 5G Channel Measurements and Models

TLDR

5G mobile systems, expected to be deployed around 2020, aim for ubiquitous connectivity and rely on new technologies such as massive MIMO, V2V, high‑speed train, and millimeter‑wave communications, each imposing distinct propagation characteristics that necessitate specialized channel models. The paper argues that accurate and efficient channel models are essential for 5G system design and performance evaluation, and therefore urgently needed. The authors first outline the requirements for 5G channel modeling and then provide a comprehensive review of recent channel measurements and models. They conclude by outlining future research directions for channel measurements and modeling.

Abstract

The fifth generation (5G) mobile communication systems will be in use around 2020. The aim of 5G systems to provide anywhere and anytime connectivity for anyone and anything. Several new technologies are being researched for 5G systems, such as massive multiple-input multiple-output communications, vehicle-to-vehicle communications, high-speed train communications, and millimeter wave communications. Each of these technologies introduces new propagation properties and sets specific requirements on 5G channel modeling. Considering the fact that channel models are indispensable for system design and performance evaluation, accurate and efficient channel models covering various 5G technologies and scenarios are urgently needed. This paper first summarizes the requirements of the 5G channel modeling, and then provides an extensive review the recent channel measurements and models. Finally, future research directions for channel measurements and modeling are provided.