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Characterizing LTE User Equipment Emissions Under Closed-Loop Power Control



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


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.
Technical Note (NIST TN) - 2147
Report Number


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],, (Accessed April 21, 2024)
Created April 6, 2021, Updated April 9, 2021