Hi I made LED based VLC link using only QAM and also 16QAM-OFDM but the problem is in constellation diagram, I could not retrieve properly.using DSP also not good and BER always 0.5.
1. First model only 16QAM (BER 0.5, SER is high but EVM is quite ok)
1. OFDM model (here EVM is more than 300% , and also BER and SER problem ) Please any one have any suggestion regarding getting right constellation
