Debugging OFDM | Error in Image reception

[Mulamoottil Abraham]

Hello,

Using the examples I have created an OFDM transmitter and receiver loopback. As given in grc file below I have changed packet length to 48 instead of 96 even though only 48 subcarriers are used as in that case I am getting correct output for bmp_24.png which is attached below. But for all other cases it fails. I have been behind this and I do not know where it actually fails as no noise is not added anywhere. Can anyone Help me in solving the issue and help me in debugging the same. Attaching grc files for the same along with sample images.

Thanks and Regards,

Abraham Abraham Mulamoottil

Graduate Student (MS in Telecommunication Program)

maa97@umd.edu.in

+12408543275

tx_ofdm.grc
Description: Binary data

bmp_24.png
Description: PNG image

sample_640×426.bmp
Description: Windows bitmap

6o3yve37-2.bmp
Description: Windows bitmap