Packet detector

[roema]

Hi Marc!

Many thanks for the great work! PySDR was the ideal introduction to the world of sdr for me!

What I'm still missing is a routine that searches for possible packets in the iq data stream, since my modem only sends one packet every second.

Do you have any ideas?
Regards, Manuel

[777arc]

Great idea! For a quick solution in the mean time, you could try taking the magnitude of the signal with np.abs() then thresholding it, should work for medium/high SNR signals if you manually tweak the threshold. You can also try np.diff(np.abs()) which will cause big spikes every time the signal goes from being off to on.

[vishwaksen-1]

Hi! I've implemented a comprehensive solution for real-time packet detection and added it to the textbook.

The new section covers:

• Correlation-based preamble detection
• CFAR adaptive thresholding
• Buffer management for streaming data
• Complete working example with performance metrics

Check out the PR: #133
Hope this helps!

[777arc]

The new detection/correlator chapter (still a work in progress!) will address this issue, so closing. @vishwaksen-1 will continue the conversation in the PR, thanks again for the great addition!!