Dynamic Range by Design in OTA EVM measurements

Description

We present an experimental approach to design an over-the-air (OTA) millimeter-wave system for measuring error vector magnitude (EVM) with associated uncertainties that include correlations and nonlinearities. Our approach uses a variable waveguide attenuator at the output of a modulated-signal source at 44 GHz and provides traceable measurements on a calibrated equivalent-time sampling oscilloscope. The conductor-based EVM measurements and associated uncertainties presented here serve as a baseline for the eventual OTA-based 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.

Resources

Name Format Description Link
47 2938_README.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2938/2938_README.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2938/2938_README.txt.sha256
47 data_for_Fig2_2023.04.22_final.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2938/data_for_Fig2_2023.04.22_final.txt
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2938/data_for_Fig3_2023.04.22_final.txt.sha256
47 https://data.nist.gov/od/ds/ark:/88434/mds2-2938/data_for_Fig2_2023.04.22_final.txt.sha256
47 data_for_Fig3_2023.04.22_final.txt https://data.nist.gov/od/ds/ark:/88434/mds2-2938/data_for_Fig3_2023.04.22_final.txt

Tags

  • digitally-modulated-signals
  • over-the-air-measurements
  • uncertainty-analysis
  • wireless-system
  • error-vector-magnitude

Topics

Categories