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Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control

Published

Author(s)

Jason Coder, Aric Sanders, Michael R. Frey, Adam Wunderlich, Azizollah Kord, Jolene Splett, Lucas N. Koepke, Daniel Kuester, Duncan McGillivray, John M. Ladbury

Abstract

This report presents a laboratory-based characterization of Long Term Evolution (LTE) User Equipment (UE) emissions under closed-loop power control, building on our prior work (NIST TN 2069), which assessed the impact of a large number of factors affecting UE emissions. Specifically, this investigation aims to shed light on real-world UE behavior through rigorous measurements of uplink power per physical resource block under a variety of realistic conditions and settings. In addition, this work provides insight into the relationship between the UE-reported uplink power and the actual power radiated by the UE. Although the results presented here pertain to LTE equipment operating in a specific frequency band, LTE Band 66 (1710 MHz - 1780 MHz), the measurement method is presented in enough detail that additional investigations can be performed in other bands of interest. The report concludes with a summary of contributions on a variety of uplink emissions topics of common interest to those developing interference models and coexistence strategies.
Citation
Technical Note (NIST TN) - 2147
Report Number
2147

Citation

Coder, J. , Sanders, A. , Frey, M. , Wunderlich, A. , Kord, A. , Splett, J. , Koepke, L. , Kuester, D. , McGillivray, D. and Ladbury, J. (2021), Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.2147, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=931754 (Accessed July 31, 2021)
Created April 6, 2021, Updated April 9, 2021