Table of Contents
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CDM-625 Advanced Satellite Modem
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
Figure 7-2. Viterbi with concatenated R-S Outer Code
2
3
4
5
Uncoded BPSK/QPSK
Sync
threshold,
Rate 3/4
Sync
threshold,
Rate 7/8
2
3
4
5
MN-0000036 (Ref MN/CDM625.IOM)
6
7
8
Specification
Limit Rate 1/2
and 220,200
Outer Code
Specification
Limit Rate 3/4
and 220,200
Outer Code
6
7
8
7–12
Revision 1
Eb/No in dB
9
10
11
Viterbi with
concatenated
RS 220,200
Outer Code
Specification
Limit Rate 7/8
and 220,200
Outer Code
9
10
11
12
12
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