in sadder news, the HackRF Pro isn't really designed to allow the FPGA to do AGC :( the transceiver's gain control pins B1..7 are unconnected so I'd need to go through the MCU and then the 20MHz SPI i...
back on the topic of carrier recovery... in O-QPSK the phase has a uniform distribution, so I guess it's unsurprising that a costas loop doesn't quite work. that or I'm doing something wrong, which is quite the possibility :neofox__w:
instead I resigned to frequency for now. the phase difference from a pulse ago does have usable statistics once wrapped into a [-ฯ/2, +ฯ/2] range, so I designed the following loop (cc @nprofile1q... since you were interested)
instead I resigned to frequency for now. the phase difference from a pulse ago does have usable statistics once wrapped into a [-ฯ/2, +ฯ/2] range, so I designed the following loop (cc @nprofile1q... since you were interested)
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