Yes, it is possible to extract the EVM (Error Vector Magnitude) from the PRACH (Physical Random Access Channel) in 5G. Here is an example workflow for extracting the EVM from the PRACH in MATLAB:
- Generating the PRACH signal
carrier = nrCarrierConfig; % Create a carrier configuration object
prach = nrPRACH(carrier); % Generate the PRACH signal
- Adding noise to the signal
snr = 15; % Signal-to-noise ratio in dB, adjust it to match the desired noise level
prach_noisy = awgn(prach, snr, 'measured'); % adding white gaussian noise
- Demodulate the signal
[ref, ~] = nrPRACHSequence(carrier); % Generate the PRACH reference symbols
prach_demod = nrPRACHDemodulate(prach_noisy, carrier.NSize, ref);
- Compute the EVM using the reference symbols and the demodulated PRACH signal
evm = comm.EVM;
[~, emod] = step(evm, ref, prach_demod);
Here emod variable will contain the EVM in percent.
Helpful links: https://www.mathworks.com/help/comm/ref/awgn.html, Generate PRACH OFDM modulated waveform - MATLAB nrPRACHOFDMModulate (mathworks.com)
Hope it helps!
