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The performance of the VersaFEC codes compared with the Shannon bound is shown in Figure B-1.
This puts the performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks.
Note that SNR is used in place of Eb/No – a convention for comparing ACM ModCods. SNR is
defined as Eb/No + 10
VersaFEC ACM requires the appropriate FAST code for the maximum operating
symbol rate.
Appendix B
Figure B-1. VersaFEC Codes versus Shannon Capacity
(Spectral Efficiency).
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CDM-425 Advanced Satellite Modem
B–3
Revision 0
MN-CDM-425
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