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ModCod Modulation
00
BPSK
01
QPSK
02
QPSK
03
QPSK
04
QPSK
05
8-QAM
06
8-QAM
07
8-QAM
08
16-QAM
09
16-QAM
10
16-QAM
11
16-QAM
The VersaFEC codes compared with the Shannon bound are shown in Figure K-2. This puts the
performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks.
Appendix K
Table K-1. The VersaFEC ModCod Set
Spectral
Code
Block size,
efficiency,
Rate
kbits
bps/Hz
0.488
0.49
2
0.533
1.07
4.1
0.631
1.26
4.1
0.706
1.41
4.1
0.803
1.61
4.1
0.642
1.93
6.1
0.711
2.13
6.1
0.780
2.34
6.1
0.731
2.93
8.2
0.780
3.12
8.2
0.829
3.32
8.2
0.853
3.41
8.2
K–9
CDM-425 Advanced Satellite Modem
Typical
Eb/No, for
Latency at
BER = 5 x
64 kbps (ms)
10-8
(dB)
2.4
26
2.2
53
2.7
59
3.4
62
3.8
66
4.6
89
5.2
93
5.6
97
6.3
125
7.0
129
7.5
131
8.0
132
Revision 0
Max. Data
Min. Data
Rate,
Rate,
CCM
CCM mode
mode
(kbps)
(Mbps)
18
5.7
20
10
23
10
26
10
28
12
35
12
39
12
43
12
53
12
57
14
60
14
62
16
MN-CDM-425
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