CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Forward Error Correction Options MN/CDM570L.IOM
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
E b/No in dB
Uncoded

Comtech Turbo Product Code c

Rate 7/8 8-QAM

BPSK/QPSK
Figure 7-9. Rate 7/8 8-QAM Turbo
1 2 3 4 5 6 7 8 9 1 0 11 1
2
BER
Uncoded
8-PSK
S pec limi t
Ra te 7/8
8-QAM
Typical
performance
7–18