Tid: 2023-05-24 13:15 till 15:00
Plats: 2311, E-huset, Ole Römers väg 3, LTH, Lund University, Lund, and online
Kontakt: chao [dot] zhang [at] eit [dot] lth [dot] se

Title: Enabling eMBB in 5G: Wireless Channel Characterization and Modeling

Author: Chao Zhang, Department of Electrical and Information Technology, Lund University

Location: 2311, E-huset, Ole Römers väg 3, LTH, Lund University, Lund.

Summary

Today, fifth generation (5G) communication network is in its initial phase of commercialization and expected to penetrate every region by 2026. 5G New Radio (5G NR) is the new radio air interface being developed by 3rd Generation Partnership Project (3GPP) for 5G radio access technology. 3GPP introduces three major use cases, including Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC), and Ultra-Reliable and Low Latency Communication (uRLLC) for 5G NR. Among various enabling technologies for 5G, channel modeling, studied in release 14, is the key to understand the characteristics of the radio channel in 5G. Channel characteristics have a widerange impact on the system performance in terms of capacity, coverage, spectrum effciency and thus also affect the design of the radio, architecture, etc.

In this thesis, we focus on these enabling technologies for 5G, and mainly explore the channel characteristics for various scenarios as de ned in 5G NR with the frequency range from 2.58 GHz to 40 GHz. We aim to develop statistical channel models for the radio network and discuss how the channel characteristics will a ect the system performance. The thesis starts with a book chapter, i.e., a literature review which presents measurement-based propagation channel investigations for different scenarios. For each eMBB scenario, field measurements, antenna types, data processing, and channel characteristics are discussed. Then, the thesis explores a few interesting scenarios in this research field with several experimental results. We first focus on vegetation attenuation at high frequency bands, and study channel characteristics, e.g., path loss, dispersion, polarization, etc., by using our developed channel sounder for various types of vegetation. Further, we present dynamic channel characteristics of indoor scenarios with the frequency range from 28-30 GHz, and compare the cluster-level parameters between a hall scenario and a corridor scenario. At last, we study interference, detected cells number, handover rate, etc. for low-height air-to-ground channels in two suburban scenarios.