Comtech EF Data CDM-625 - Manual (Page 288)

CDM-625 Advanced Satellite Modem Revision 15
Forward Error Correction Options MN-CDM625
7–16
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 1 1 12
Eb/No i n dB
Specification
limit Rate 1/2
Coding
Uncoded BPSK/QPSK
Typical
Performance
Specification
limit, Rate 3/4
Coding
1 2 3 4 5 6 7 8 9 10 11 12
Specification
limit, Rate 7/8
Coding
BER
Viterbi
Decoding
Figure 7-3. Viterbi Decoding