Figure 7-17. Rate 3/4 Qpsk, Oqpsk, 8-Psk, 8-Qam, 16-Qam Ldpc Codec - Comtech EF Data CDM-625 Installation And Operation Manual

CDM-625 Advanced Satellite Modem
Forward Error Correction Options
1
1E-1
Uncoded
BPSK/QPSK
1E-2
1E-3
Spec limit
Rate 3/4
QPSK/OQPSK
1E-4
1E-5
1E-6
1E-7
Typical
performance
1E-8
1E-9
1
BER

Figure 7-17. Rate 3/4 QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM LDPC Codec

2 3 4 5
Spec limit
Rate 3/4
8-PSK
8-QAM
2 3 4 5
6 7 8
Comtech LDPC
Rate 3/4 QPSK/OQPSK
8-PSK/8-QAM and 16-QAM
6 7 8
7–30
Revision 13
MN-CDM625
Eb/No in dB
9 10 11
Uncoded
8-PSK
Spec limit
Rate 3/4
16-QAM
9 10 11
12
12