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CDM-625 Advanced Satellite Modem
Forward Error Correction Options
1
1E-1
Uncoded
BPSK/QPSK
1E-2
1E-3
Spec limit
Rate 2/3
QPSK/OQPSK
1E-4
1E-5
1E-6
1E-7
Typical
performance
1E-8
1E-9
1
BER
Figure 7-11. Rate 2/3 QPSK, OQPSK, 8-PSK, 8QAM LDPC coding
2
3
4
5
Spec limit
Rate 2/3
8-QAM
2
3
4
5
MN-0000036 (Ref MN/CDM625.IOM)
6
7
8
Comtech LDPC
Rate 2/3 QPSK/OQPSK
and 8-PSK/8-QAM
Spec limit
Rate 2/3
8-PSK
6
7
8
7–21
Revision 1
Eb/No in dB
9
10
11
12
Uncoded
8-PSK
9
10
11
12
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