Good morning!
I need a helping hand.
In fact, I simulate an optical link with a speed of 10 GB/s to 50 GB/s. This link uses the 4-PAM modulation format in direct intensity modulation on a VCSEL laser which sends the signal on a multimode fiber. The signal is directly detected by a photodiode.
My problem is that when I do a back to back simulation normally the BER must be 0 since there is no fiber but I find something that is close to 1. I believe my problem is at the level of the recovery between encoder and decoder
The help of someone who has already simulated such a speed on such a link would be very valuable to me.
NB: I am doing a co-simulation using matlab 2019a and optisystem15
thank you !
