issue about ofdm-transfer

[glv2]

issue about ofdm-transfer

[glv2]

The repository for ofdm-transfer is at https://codeberg.org/glv/ofdm-transfer.

The failure to decode frames could be due to a too low gain. Have you check with a general SDR receiver (like gqrx) if you can clearly see the signal with the gain settings you chose?

[liiso7]

Yes, I used GQRX to check my transmit signal and it can see the signal on my transmit frequency. I also adjusted the gain but still couldn't decode the frame.
What is the format of your transfer file? Could you please provide me with your transfer files? Thank you very much!!

[glv2]

If your SDR devices have a noticeable DC spike, it could interfere with the decoding. In this case you should use offset tuning with the '-o' command line option.

[liiso7]

I used the '-o' command-line option and here are some of the arguments I used:
ofdm-transfer -t
-r driver=bladerf
-s 4000000
-f 434000000
-o 100000
-b 38400
-g 60
-w 1
-v \

ofdm-transfer -r driver=bladerf \
              -s 4000000 \
              -f 434000000 \
              -o 100000 \
              -b 38400 \
              -g 60 \
              -w 1\
              -T 30 \
              -v 

[liiso7]

I used the following command to perform the ofdm test without SDR:
TX : ofdm-transfer -t -r file=/tmp/samples.dat -s 4000000 -f 434000000 -o 0 -b 38400 -g 60 -w 1 -v -a '/home/ss/Linux-OFDM/ofdm_loopback05_Rx_Vector_Source.sc16q11'
RX : ofdm-transfer -r file=/tmp/samples.dat -s 4000000 -f 434000000 -o 0 -b 38400 -g 60 -w 1 -T 30 -v sample_rx.dat
I stored the sent data in '/tmp/samples.dat' file and read the data from this file for ofdm demodulation, as a result I did not demodulate any data on rx. What's wrong with me doing this? Why don't we get any data?Looking forward to your reply！