I have a question about LTE multiple access technique.
In DL we use OFDMA, we increase the symbol time to overcome ISI, and in UL we use SC-OFDMA by modulating the whole subcarriers with the same info but with a small symbol duration… Now the ISI is back again in the UL. What do we do to overcome it then?

Hi @minasaad

Here you can find a good conversation, with possible answers: