We are starting the process of integrating synchronization functions into the receiver for Opulent Voice, our open source high definition voice and data protocol for amateur radio and industry use. The shared image is an early clock recovery result from this work. Recovering the clock is essential in getting the best estimation of the received symbols.
We will be comparing several different methods in simulation, including digital bandpass filters, PLLs, NCOs, and polyphase techniques.
If you're interested in this sort of work, please check out https://openresearch.institute/getting-started
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