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CDM-625A Advanced Satellite Modem
Appendix B
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 B-17. LDPC Codec Rate 2/3 QPSK/OQPSK and 8-PSK/8-QAM
2
3
4
Spec limit
Rate 2/3
8-QAM
2
3
4
5
6
7
Comtech LDPC
Rate 2/3 QPSK/OQPSK
and 8-PSK/8-QAM
Spec limit
Rate 2/3
8-PSK
5
6
7
B–35
MN-CDM625A
Eb/No in dB
8
9
10
11
Uncoded
8-PSK
8
9
10
11
Revision 4
12
12
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