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CDM-625A Advanced Satellite Modem
Appendix B
1
1E-1
Uncoded
BPSK/QPSK
1E-2
Rate
1E-3
0.493
BPSK/QPSK
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1
BER
Figure B-23. ULL Codec Rate 0.493 BPSK/QPSK and Rates 0.654 and 0.734 QPSK
2
3
4
Rate
Rate
0.654
0.734
QPSK
QPSK
Typical performance shown -
guaranteed performance curves
2
3
4
5
6
7
Comtech Ultra-Low-Latency
(ULL) Codec - Rate 0.493
BPSK/QPSK,
0.654 and 0.734 QPSK
are 0.3 dB to the right
5
6
7
B–36
MN-CDM625A
Eb/No in dB
8
9
10
11
8
9
10
Revision 0
1 2
11
1 2
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