There are multiple definitions:
ensemble vector magnitude(English)
- a critical metric used to quantify the performance of digital radio transmitters or receivers by measuring the difference between ideal and actual modulated signal points
- AF, ECG, EVI, VF
- Cardiology, Electrophysiology, Biophysics, Pathology
- https://doi.org…eart.01108.2001
error vector magnitude(English)
- a simple metric to quantify the combination of all signal impairments in a system. It is frequently defined for devices that use digital modulation
- ACPR, RF, OTA
- Signal analysis
- https://doi.org…64/oe.22.020982
- https://doi.org…AP.2023.3272838