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CDM-600 Satellite Modem Revision 7
Forward Error Correction Options MN/CDM600.IOM
7–28
Figure 7-16. LDPC, Rate 3/4, (O)QPSK/8-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
BER
Spec limit
QPSK/OQPSK
Rate 3/4
Uncoded
8-PSK
Typical limit
QPSK/OQPSK
Rate 3/4
12
34
5
67
8
9
10
11 12
LDPC, Rate 3/4
QPSK/OQPSK/
8-QAM
Spec limit
8-QAM
Rate 3/4
Typical limit
8-QAM
Rate 3/4