SDM-2020 Satellite Demodulator
Operation
Rev. 3
3–55
Table 3-5. (C+N)/N to C/N and E
b
/N
0
Conversion Chart
Modulation And Code Rate
QPSK
8PSK
16QAM
1/2
2/3
3/4
5/6
7/8
2/3
5/6
8/9
3/4
7/8
(C+N)/N
C/N
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
5.0
3.35
3.70
2.45
1.94
1.49
1.27
0.69
-0.28
-0.56
-1.07
-1.74
5.5
4.06
4.42
3.17
2.66
2.20
1.99
1.41
0.44
0.16
-0.35
-1.02
6.0
4.74
5.10
3.85
3.34
2.88
2.67
2.09
1.12
0.84
0.33
-0.34
6.5
5.40
5.75
4.50
3.99
3.54
3.32
2.74
1.77
1.49
0.98
0.31
7.0
6.03
6.39
5.14
4.63
4.17
3.96
3.38
2.41
2.13
1.62
0.95
7.5
6.65
7.00
5.75
5.24
4.79
4.57
3.99
3.02
2.74
2.23
1.56
8.0
7.25
7.61
6.36
5.84
5.39
5.17
4.60
3.63
3.35
2.83
2.16
8.5
7.84
8.19
6.94
6.43
5.97
5.76
5.18
4.21
3.93
3.42
2.75
9.0
8.42
8.77
7.52
7.01
6.55
6.34
5.76
4.79
4.51
4.00
3.33
9.5
8.98
9.34
8.09
7.58
7.12
6.91
6.33
5.36
5.08
4.57
3.90
10.0
9.54
9.90
8.65
8.14
7.68
7.47
6.89
5.92
5.64
5.13
4.46
10.5
10.09
10.45
9.20
8.69
8.23
8.02
7.44
6.47
6.19
5.68
5.01
11.0
10.64
11.00
9.75
9.23
8.78
8.56
7.98
7.02
6.74
6.22
5.55
11.5
11.18
11.54
10.29
9.77
9.32
9.11
8.53
7.56
7.28
6.76
6.10
12.0
11.72
12.07
10.82
10.31
9.85
9.64
9.06
8.09
7.81
7.30
6.63
12.5
12.25
12.60
11.35
10.84
10.38
10.17
9.59
8.62
8.34
7.83
7.16
13.0
12.78
13.13
11.88
11.37
10.91
10.70
10.12
9.15
8.87
8.36
7.69
13.5
13.30
13.66
12.41
11.90
11.44
11.23
10.65
9.68
9.40
8.89
8.22
14.0
13.82
14.18
12.93
12.42
11.96
11.75
11.17
10.20
9.92
9.41
8.74
14.5
14.34
14.70
13.45
12.94
12.48
12.27
11.69
10.72
10.44
9.93
9.26
15.0
14.86
15.22
13.97
13.45
13.00
12.78
12.20
11.24
10.96
10.44
9.77
15.5
15.38
15.73
14.48
13.97
13.51
13.30
12.72
11.75
11.47
10.96
10.29
16.0
15.89
16.24
14.99
14.48
14.03
13.81
13.23
12.26
11.98
11.47
10.80
16.5
16.40
16.76
15.51
15.00
14.54
14.33
13.75
12.78
12.50
11.99
11.32
17.0
16.91
17.27
16.02
15.51
15.05
14.84
14.26
13.29
13.01
12.50
11.83
17.5
17.42
17.78
16.53
16.02
15.56
15.35
14.77
13.80
13.52
13.01
12.34
18.0
17.93
18.29
17.04
16.52
16.07
15.85
15.28
14.31
14.03
13.51
12.84
18.5
18.44
18.79
17.54
17.03
16.57
16.36
15.78
14.81
14.53
14.02
13.35
19.0
18.94
19.30
18.05
17.54
17.08
16.87
16.29
15.32
15.04
14.53
13.86
19.5
19.45
19.81
18.56
18.04
17.59
17.38
16.80
15.83
15.55
15.03
14.37
20.0
19.96
20.31
19.06
18.55
18.09
17.88
17.30
16.33
16.05
15.54
14.87
20.5
20.46
20.82
19.57
19.05
18.60
18.39
17.81
16.84
16.56
16.04
15.38
21.0
20.97
21.32
20.07
19.56
19.10
18.89
18.31
17.34
17.06
16.55
15.88
21.5
21.47
21.82
20.57
20.06
19.61
19.39
18.81
17.84
17.56
17.05
16.38
22.0
21.97
22.33
21.08
20.57
20.11
19.90
19.32
18.35
18.07
17.56
16.89
Содержание SDM-2020
Страница 20: ...SDM 2020 Satellite Demodulator Introduction Rev 3 1 5 2 Data and symbol rates become effective January 1999...
Страница 30: ...SDM 2020 Satellite Demodulator Introduction Rev 3 1 15 Figure 1 7 16QAM 3 4 7 8 Reed Solomon Decoder...
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