Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Challenges for 5G and Beyond



Jelena Senic


In this paper, we discuss some challenges for 5G-and-beyond communications systems based on our measurements conducted with millimeter-wave (mmWave) channel sounders. One study analyzes path loss at 28 GHz vs. 83 GHz and in line-of-sight conditions vs. non-line-of-sight conditions and finds it to depend much more heavily on the latter than the former. A significant factor of path loss is penetration loss; in fact, another study focuses on obstructions that are typical in wireless environments: building walls, human bodies, and trees. Finally, in addition to investigating how power is distributed over distance through path loss, we also investigate how power is distributed over delay and angle per distance, otherwise referred to as channel dispersion. In particular, we discuss the importance of diffuse multipath to the total received power at mmWave and the foregone conclusion of wide-sense stationarity, which we show will often not apply to mmWave small-scale fading.
Proceedings Title
EuCAP 2022 (16th European Conference on Antennas and Propagation)
Conference Dates
March 27-April 1, 2022
Conference Location
Madrid, ES
Conference Title
16th European Conference on Antennas and Propagation


Senic, J. (2022), Challenges for 5G and Beyond, EuCAP 2022 (16th European Conference on Antennas and Propagation), Madrid, ES, [online], (Accessed July 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created May 11, 2022, Updated December 19, 2023