Ber Performance Specifications; Viterbi Decoder Ber; Table 1-5. Viterbi Decoder Ber Data - Comtech EF Data SLM-3650 Installation And Operation Manual

SLM-3650 Satellite Modem
Introduction
1.5

BER Performance Specifications

Table 1-5 through Table 1-9 lists the Bit Energy-to-Noise Ratio (E
achieve 10
1.5.1

Viterbi Decoder BER

Table 1-5 lists the Viterbi specifications for the E
BER for different coding configurations. All values are for operating in QPSK mode.
Without coding, the modem provides QPSK operation within 0.8 dB of theoretical for
BER in the range 10
and receive IF connected back-to-back through an additive white Gaussian noise channel.
Refer to Figure 1-4 for the Viterbi BER curves.
Specification
IBS
BER 1/2 Rate
4.2 dB
10 -3
10 -4 4.7 dB
10 -5 5.4 dB
10 -6 6.1 dB
10 -7 6.7 dB
10 -8 7.2 dB
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to 10 BER.
-3 -10
to 10 . Performance measurements were recorded with transmit
-1 -6

Table 1-5. Viterbi Decoder BER Data

IDR IDR
3/4 Rate 7/8 Rate
5.3 dB 6.3 dB
6.1 dB 7.2 dB
6.8 dB 8.0 dB
7.6 dB 8.7 dB
8.3 dB 9.4 dB
8.8 dB 10.3 dB
1–15
/N required to achieve 10
b 0
Typical
IBS IDR
1/2 Rate 3/4 rate
3.9 dB 4.6 dB
4.1 dB 5.4 dB
4.6 dB 6.0 dB
5.3 dB 6.8 dB
5.9 dB 7.5 dB
6.4 dB 8.0 dB
Revision 3
MN/SLM3650.IOM
/N ) required to
b 0
to 10
-3 -8
IDR
7/8 Rate
5.8 dB
6.5 dB
7.2 dB
7.9 dB
8.6 dB
9.4 dB