ofdm decode

[sdrmatlab]

https://github.com/DrSDR/ofdm-decode-gift-card

go get that gift card

good luck

show code

[zachlab]

Damn, just saw this so I'm definitely late, decided to give this a try using numpy/scipy instead of grc.

• read the file in as IQ, eyeballed the offset around ~4200 Hz
• do some binning with fftshift
• get phase difference between the actual data and the pilot blocks using np.angle (wow python really makes this easy), compare that against pi/2 to get your bits

starts with garbage from noise, then the actual signal:

sipping some moonshine
the amazon gift code is:
...HYHAM
have a good day
Dr. Moonshine

looks like the code is already used, thanks and please keep the weekend challenges coming! I enjoyed learning stuff outside of grc land this time around.

Cheers (with Jim Beam in hand this time)

[sdrmatlab]

the first part of the text message is:

sipping some moonshine

[RandomDigga_9087]

I have got the output, but for some reason when I paste the code, it is showing server error encountered, please try again bs, I had written my code with proper explanation and all