Comtech EF Data CDM-625A - Manual (Page 572)

CDM-625A Advanced Satellite Modem MN-CDM625A
Appendix B Revision 3
B–36
Figure B-18. LDPC Codec Rate 3/4 QPSK/OQPSK, 8-PSK/8-QAM, and 16-QAM
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
1 2 3 4 5 6 7 8 9 10 11 12
Eb/No in dB
Uncoded
BPSK/QPSK
Comtech LDPC
Rate 3/4 QPSK/OQPSK
8-PSK/8-QAM and 16-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Spec limit
Rate 3/4
16-QAM
Spec limit
Rate 3/4
QPSK/OQPSK
Typical
performance
Uncoded
8-PSK
Spec limit
Rate 3/4
8-PSK
8-QAM