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Dynamic Range by Design in OTA EVM measurements



Paritosh Manurkar, Dan Kuester, Joshua Kast, Rob Horansky


We present an experimental approach to design an over-the-air (OTA) millimeter-wave measurement of error vector magnitude (EVM) and associated uncertainties that include correlations and nonlinearities. Our approach uses a waveguide-variable attenuator at the output of a modulated-signal source at 44 GHz and performs traceable measurements on a calibrated equivalent-time sampling oscilloscope. The measured EVM and the associated uncertainties presented here then serve as the conducted baseline for the eventual OTA EVM. We also discuss a noise based EVM estimation technique as a simple tool for planning OTA EVM measurements, but without a complete knowledge of measurement uncertainties.
Proceedings Title
2023 101st ARFTG Microwave Measurement Conference (ARFTG)
Conference Dates
June 11-16, 2023
Conference Location
San Diego, CA, US


Digitally modulated signals, error vector magnitude, Over-the-air measurements, uncertainty analysis, wireless system.


Manurkar, P. , Kuester, D. , Kast, J. and Horansky, R. (2023), Dynamic Range by Design in OTA EVM measurements, 2023 101st ARFTG Microwave Measurement Conference (ARFTG), San Diego, CA, US, [online],, (Accessed July 18, 2024)


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Created October 17, 2023, Updated December 22, 2023