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by brian-armstrong
1539 days ago
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In my experience, the non-linearity is not the issue. It's the multipath that gets you with these things. Your signal echoes off of everything. I was able to get QAM working with Quiet[1] just fine but only at a few centimeters. FSK is much more reasonable. If you're having issues with intersymbol interference it's probably still multipath getting you. I'd say slow the symbol rate down to avoid it. I've had very good success with FSK with Quiet. 1: https://quiet.github.io/quiet-js |
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