Figure 7-2. Viterbi With Concatenated Rs Outer Code - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Forward Error Correction Options
1
1E-1
1E-2
1E-3
1E-4
Combined sync
1E-5
threshold, demod
and Viterbi
Decoder, Rate 1/2
1E-6
1E-7
Typical performance
1E-8
1E-9
1
BER
2 3 4
Uncoded BPSK/QPSK
Sync
threshold,
Rate 3/4
Sync
threshold,
Rate 7/8
2 3 4

Figure 7-2. Viterbi with concatenated RS Outer Code

5 6 7
Specification
Limit Rate 1/2
and 220,200
Outer Code
Specification
Limit Rate 3/4
and 220,200
Outer Code
5 6 7
7–11
MN/CDM570L.IOM
Eb/No in dB
8 9 10 11
Viterbi with
concatenated
RS 220,200
Outer Code
Specification
Limit Rate 7/8
and 220,200
Outer Code
8 9 10 11
Revision 3
12
12