version 3.8, ofdm, adalpm pluto data transfer

1- I couldn't transmit any data (text,picture or serial data) with gnuradio 3.8 version

2- If possible; How can I do it with OFDM modulation? 

I would be very grateful for any help 

p.s: 2 file example; how can i combine these two files

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Özkan SEZER

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