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Apr 15 at 12:26 comment added Dan Boschen @mr_js I do not see any reason why the Costas loop would not work with your waveform, and as I noted there is no real issue with your doubled waveform; you will see very similar effects after squaring a bandwidth reduced waveform and have to proceed the same way (filter or better PLL lock) when using a doubling loop. So if you are concerned about the bandwidth you are transmitting- then this is the reason to reduce it, otherwise you're not far with what you have to make the receiver work.
Apr 15 at 10:56 comment added mr_js Thanks for your comprehensive input. I'm actually aware of the Costas loop and other techniques. My problem is getting them to work on non-ideal signals. Reducing the bandwidth by not transmitting square waveforms should be a help. In this case, raised cosine filters are more relevant...
Apr 13 at 15:59 history edited Dan Boschen CC BY-SA 4.0
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Apr 13 at 15:40 history edited Dan Boschen CC BY-SA 4.0
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Apr 13 at 15:33 history edited Dan Boschen CC BY-SA 4.0
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Apr 13 at 15:24 history answered Dan Boschen CC BY-SA 4.0