Premier Mounts CDM-600 Viterbi with concatenated RS 220,200 Outer Code

CDM-600 Satellite Modem Revision 7
Forward Error Correction Options MN/CDM600.IOM
7–17
Figure 7-5. Viterbi with concatenated R-S Outer Code
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
Specification
Limit Rate 1/2
and 220,20 0
Outer Code
Uncoded BPSK/QPSK
1 2 3 4 5 6 7 8 9 10 11 1
2
BER
Viterbi with
concatenated
RS 220,200
Outer Code
Combi ned sync
threshold, demod
and Viterbi
Decoder , Ra te 1 /2
Sync
thresho ld,
Rate 3/4
Specification
Limit Rate 3 /4
and 220,20 0
Outer Code
Specification
Limit Rate 7/8
and 220,200
Outer Code
Sync
thresho ld,
Rate 7/8
Typical performa nce