nrPolarDecode - Transmit and Decode Polar Encoded Data example
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
In that example, the output of the decoder was zero. When I run that example, I get some errors and some zero bit errors. If I comment out the modulation/demodulation and AWGN channel (the encoder and decoder only), then I should get zero every time. But that is still not the case. Can anyone explain why that is not zero bit error everytime?
0 commentaires
Réponses (1)
Adeline
le 25 Août 2023
I understand that you are trying to execute the “nrPolarDecode” example in https://www.mathworks.com/help/5g/ref/nrpolardecode.html. The code will result in zero if you use a default AWGN channel as follows:
chan = comm.AWGNChannel;
instead of
chan = comm.AWGNChannel('NoiseMethod','Variance','Variance',nVar);
Regarding the scenario where your system only had the encoder and decoder: The input “rxLLR” represents the log-likelihood ratios per bit with a negative bipolar mapping. Here, a 0 should be mapped to 1, and a 1 should be mapped to -1. Therefore, a zero error can be obtained by defining the input to the decoder as mentioned below:
rxLLR = 1.0 - 2.0*double(enc);
0 commentaires
Voir également
Catégories
En savoir plus sur Material Sciences dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!