Just like it says on the tin, it’s phase shift keying, and a proper implementation uses a phase detection circuit or something similar. [Craig] thought it would be fun to build an analog BPSK31 ...
We designed SP (Set Partitioning)-64APSK (Amplitude Phase Shift Keying) with a coding rate of 4/5 as a multi-level modulation scheme beyond 32APSK supported by the ISDB-S3 (Integrated Services ...
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