Comtech EF Data SDM-9000 - Manual (Page 38)

Introduction SDM-9000 Satellite Modem
1–16 Rev. 4
1.4.3 8PSK and 16QAM (Viterbi Decoder and Reed-Solomon Codec)
The 8PSK and 16QAM specifications for the E
b
/N
0
required to achieve 10 -6 to 10 -9 BER
with the Viterbi decoder and Reed-Solomon Codec are shown in Table 1-4. Refer to
Figures 1-6 (8PSK) and 1-7 (16QAM) for the BER curves with the Reed-Solomon
option.
Table 1-4. 8PSK and 16QAM BER Data
Specification
8PSK 8PSK 16QAM 16QAM
BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate
10 -6 6.1 dB 8.2 dB 8.3 dB 9.8 dB
10 -7 6.4 dB 8.5 dB 8.5 dB 10.0 dB
10 -8 6.6 dB 8.9 dB 8.7 dB 10.3 dB
10 -9 6.9 dB 9.3 dB 8.9 dB 10.5 dB
Typical
8PSK 8PSK 16QAM 16QAM
BER 2/3 Rate 5/6 Rate 3/4 Rate 7/8 Rate
10 -6 5.6 dB 7.7 dB 7.8 dB 9.4 dB
10 -7 5.8 dB 7.9 dB 8.1 dB 9.7 dB
10 -8 6.1 dB 8.4 dB 8.3 dB 9.9 dB
10 -9 6.3 dB 8.7 dB 8.6 dB 10.2 dB