Figure B-3. Viterbi With Concatenated Rs 220, 200 Outer Code - Comtech EF Data CDM-570A Installation And Operation Manual

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Appendix B
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 B-3. Viterbi with Concatenated RS 220, 200 Outer Code

2 3 4
Uncoded BPSK/QPSK
Sync
threshold,
Rate 3/4
Sync
threshold,
Rate 7/8
2 3 4
5 6 7
Specification
Limit Rate 1/2
and 220,200
Specification
Limit Rate 3/4
and 220,200
5 6 7
B–13
MN-CDM570A
Eb/No in dB
8 9 10
Viterbi with
concatenated
RS 220,200
Outer Code
Outer Code
Outer Code
Specification
Limit Rate 7/8
and 220,200
Outer Code
8 9 10
Revision 3
11 12
11 12