Hi everyone,
Is there any provision of calculating % Error Vector Magnitude (EVM) in optisystem. When I did googling I found the following theory:
“Error vector magnitude (EVM) is a measure of modulation quality and error performance in complex wireless systems. It provides a method to evaluate the performance of software-defined radios (SDRs), both transmitters and receivers. It also is widely used as an alternative to bit error rate (BER) measurements to determine impairments that affect signal reliability. (BER is the percentage of bit errors that occur for a given number of bits transmitted.) EVM provides an improved picture of the modulation quality as well.
EVM considers all of the potential phase and amplitude distortions as well as noise and provides a single comprehensive measurement figure for determining the quality of a circuit or product.
Using phasors in the I/Q plane, EVM illustrates the reference or ideal symbol vector location and size compared to the actual measured vector (Attached image). The difference between the two is the EVM, which can be measured on transmitter modulator or receiver demodulator circuits.
EVM is the ratio of the average of the error vector power (Perror) to the average ideal reference vector power (Pref) expressed in decibels. The averages are taken over multiple symbol periods:
EVM (dB) = 10 log (Perror/Pref)
You will also see it expressed as a percentage:
EVM (%) = √(Perror/Pref) x 100 ”
So the above mentioned theory I got when I searched but How can I calculate EVM from optisystem.
Is there any block to calculate the EVM.
with regards
.