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
Eb/ No in dB
Uncoded
BPSK/QPSK

Comtech Turbo Product Codec

Rate 21/44 QPSK/OQPSK

Rate 0.95 QPSK/OQPSK

and 8-PSK

1 2 3 4 5 6 7 8 9 10 11 12
BER
Spec l im it
Rate 0. 95
8-PSK
Spec l im it
Rate 0.95
QPSK/OQPSK
Spec l im it
Rate 1/2
QPSK/OQPSK
Typical
performance
Uncoded
8-PSK
Figure 7-6. Comtech EF Data Turbo Product Codec
Rate 21/44 QPSK, Rate 0.95 QPSK and Rate 0.95 8-PSK
7–15