Hi Tom, The corr_est block needs to match against the NRZI encoded symbols, so yes I used 7 ones for the hdlc flag.
The HDLC flag has two possible NRZI encodings depending on the initial state: 01111110 - HDLC flag byte 1 00000001 - NRZI encoded HDLC flag byte, initial state 1 01111110 - HDLC flag byte 0 11111110 - NRZI encoded HDLC flag byte, initial state 0 So encoding your two byte sequence: 01111110 00100001 1 00000001 01101011 or 0 11111110 10010100 You should build your corr_est preamble samples based on one of these. Regards, Andy _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
