The error vector magnitude or EVM (sometimes also called relative constellation error or RCE) is a measure used to quantify the performance of a digital radio transmitter or receiver. Informally, EVM is a measure of how far the points are from the ideal locations.
Besides, what is EVM LTE?
EVM is used as a measure of the received signal constellation error. EVM is defined as the difference between the ideal received waveform and the measured waveform for allocated resource blocks.
Also Know, what is Mer in digital communication?
The modulation error ratio or MER is a measure used to quantify the performance of a digital radio (or digital TV) transmitter or receiver in a communications system using digital modulation (such as QAM).
What is signal space diagram?
Signal space diagrams are described which show the pattern of amplitude and phase variation for several kinds of modulated carrier signals commonly used in digital data transmission. Such diagrams illustrate important similarities and differences among the various modulation methods.
How is EVM calculated?
EVM is generally expressed in percent by multiplying the ratio by 100%. The ideal signal amplitude reference can either be the maximum ideal signal amplitude of the constellation, or it can be the root mean square (RMS) average amplitude of all possible ideal signal amplitude values in the constellation.