Data lost when transmitting pictures and video based on digital/OFDM/rx_ofdm.grc and tx_ofdm.grc

Hi, there, I am new to OFDM. My GNU Radio version is 3.8.4 I am trying to transmit data by modifying the .grc example. I change the tx_ofdm original random_source block to file_source and add a usrp_sink after the tag gate, I also tune the multiply const to 2m to make sure the signal won’t out o

Re: Interpolating FIR Filter - sample delay

Hi - first, it appears you're using version 3.7.x of gnuradio which is no longer supported. The constellation encoder for your version appears as a missing block on 3.8. Second, there was no constellation posted for some reason. Third, it appears you're using 2 stream sources and a streaming m