virhevektorimagnitude
Virhevektorimagnitude, often translated as error vector magnitude (EVM), is a common metric used to quantify the performance of a digital radio transmitter or receiver. It measures the difference between the ideal signal constellation and the actual transmitted or received signal constellation. In simpler terms, it indicates how "far off" a real signal is from its intended perfect representation.
The concept of EVM is rooted in the signal constellation diagram, which plots the amplitude and phase
EVM is typically expressed as a percentage, where a lower percentage indicates better performance. It is calculated