Hi, My Friends:
Recently, I follow the application article " Guided Tutorial PSK Demodulation", and can make my QPSK/8PSK Tx/Rx demo with AD9361 successfully.
Please see blow pic:
But when I use the same architecture flow chart for BPSK demodulation, I found the Costas-loop can't lock correctly.
Please see below pic:
It looks like:
Maybe the CMA Equalizer do not work correctly under BPSK, so it cause the Costas-loop can't lock.
When I disable the CMA Equalizer and connect the Poly-phase Sync
to Costas-loop directly, the Costas-loop can lock, I can get good
BPSK constellation.
As we know the CMA Equalizer is a right choice for MPSK demod, so is there any thing wrong with my BPSK demodulation flow chart?
Thanks very much!
