This is the beginning of the packet that includes preamble and sync sequence. Red is real part, blue is imaginary.
I don't have access to the radio that transmit this data. I know that this is QPSK modulated data. Preamble and sync sequence should be BPSK modulated, but I cannot demodulate this data, they don't look like a "good" BPSK. I also know that the data have been processed by RRC filter before transmission. What is this phenomenon, and what I can do with this data? Thank you,