Ber Performance; Data Rate - Comtech EF Data SLM-3650 Installation And Operation Manual

SLM-3650 Satellite Modem
Installation
2.4.1

BER Performance

Note: BPSK 5/16 rate Turbo is included for compatibility with other Comtech EF Data
equipment. However, implementation limitations prohibit optimum performance at
Eb/No values below 4.0 dB. Performance is virtually error free above 4.0 dB Eb/No, and
operation below this level is not recommended.
2.4.2

Data Rate

BPSK
BPSK
QPSK/OQPSK
QPSK/OQPSK
8PSK
Note: {O}QPSK 1/2 Rate Turbo requires additional frame overhead. When
computing symbol rates for {O}QPSK 1/2 Rate, use an additional factor of 22/21
(e.g.: SR = [DR * 2/1 * 22/21] / 2).
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Eb/N0 (dB) Specification
QPSK/OQPSK
BER
1/2 Rate 3/4 Rate 21/44 Rate
10-6 3.0 3.9 2.9
10-7 3.2 4.1 3.1
10-8 3.5 4.4 3.4
10-9 3.8 4.7 3.7
Modulation Encoding Type
Type
5/16 Rate Turbo
21/44 Rate
Turbo
1/2 Rate Turbo
3/4 Rate Turbo
3/4 Rate Turbo
2-22
BPSK 8PSK
5/16 Rate 3/4 Rate
See Note 7.0
See Note 7.3
See Note 7.6
4.0 8.0
Data Rate Range
2.4 Kbps 781.25 Kbps
2.4 Kbps 1193.0 Kbps
4.8 Kbps 2386.0 Kbps
7.2 Kbps 3750.0 Kbps
64.0 Kbps 5000.0 Kbps
Revision 3
MN/SLM3650.IOM