Hi Ramazan - Hmmm ... I'm not coming up with anything greatly useful when using a single OFDM block for Tx. Alternatively you could use a 2 channel PFB synthesizer on Tx, with 2 separate OFDM Tx and feed them into the synthesizer. On Rx use a PFB channelizer and take its 2 outputs to 2 separate OFDM Rx. The complexity of the PFBs will depend on the filtering required to keep the OFDM channels separate enough. Maybe others have useful ideas of how to do what you're looking for? Hope this is useful! - MLD
On Thu, Jun 20, 2019, at 10:49 AM, Ramazan Çetin wrote: > Hi MLD, > You are right. I guess, one of the transmitters' preamble overlaps another's > data. (Because gnuradio sends preamble in all carriers). I have attached my > receiver and transmitters' FGs. Both of them uses 256 carrier OFDM. One > transmitter use half of the carriers as occupied and another uses other half. > I guess our receiver structure is wrong. > Can you suggest a way for implementing multi user OFDM system?
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