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CDM-710G High-Speed Satellite Modem
Forward Error Correction Options
Table 11-1. Occupied Bandwidth for DVB-S2 Standard FECFrame = 64, 800 bits
Inner
**Es/No
At PER =
Type
FEC
Code
QPSK
1/4
QPSK
1/3
QPSK
2/5
QPSK
1/2
QPSK
3/5
QPSK
2/3
QPSK
3/4
QPSK
4/5
QPSK
5/6
QPSK
8/9
QPSK
9/10
8PSK
3/5
8PSK
2/3
8PSK
3/4
8PSK
5/6
8PSK
8/9
8PSK
9/10
16APSK
2/3
16APSK
3/4
16APSK
4/5
16APSK
5/6
16APSK
8/9
16APSK
9/10
32APSK
3/4
32APSK
4/5
32APSK
5/6
32APSK
8/9
32APSK
9/10
* Taken at the -10 dB points on the plot of power spectral density, the occupied bandwidth is
1.19 x Symbol Rate for 35%, and 1.15 x Symbol Rate for 25%.
** Includes implementation loss.
(QPSK 1/4, 1/3 and 2/5 are for information purposes)
Pilots Off
Spectral
Normalized
Symbol Rate
Efficiency
-7
10
(bps/Hz)
(= Bit Rate x)
-1.85
0.490243
2.040
-0.74
0.656448
1.523
0.20
0.789412
1.267
1.50
0.988858
1.011
2.73
1.188304
0.842
3.60
1.322253
0.756
4.53
1.487473
0.672
5.18
1.587196
0.630
5.68
1.654663
0.604
6.70
1.766451
0.566
6.92
1.788612
0.559
6.20
1.779991
0.562
7.32
1.980636
0.505
8.61
2.228124
0.449
10.15
2.478562
0.403
11.49
2.646012
0.378
11.78
2.679207
0.373
9.97
2.637201
0.379
11.21
2.966728
0.337
12.03
3.165623
0.316
12.61
3.300184
0.303
13.89
3.523143
0.284
14.13
3.567342
0.280
13.73
3.703295
0.270
14.64
3.951571
0.253
15.28
4.119540
0.243
16.69
4.397854
0.227
17.05
4.453027
0.225
* Occupied
Spectral
BW for
Efficiency
10 Mbps
(bps/Hz)
(25% Rolloff)
23.458
0.478577
17.519
0.640827
14.568
0.770627
11.630
0.965327
9.678
1.160026
8.697
1.290788
7.731
1.452076
7.245
1.549426
6.950
1.615288
6.510
1.724416
6.430
1.746049
6.461
1.739569
5.806
1.935658
5.161
2.177525
4.640
2.422276
4.346
2.585924
4.292
2.618365
4.361
2.574613
3.876
2.896320
3.633
3.090495
3.485
3.221863
3.264
3.439530
3.224
3.482680
3.105
3.623332
2.910
3.866247
2.792
4.030589
2.615
4.302894
2.583
4.356875
11–3
Revision 1
MN-CDM710G
Pilots On
* Occupied
Normalized
BW for
Symbol Rate
10 Mbps
(= Bit Rate x)
(25% Rolloff)
2.090
24.030
1.560
17.946
1.298
14.923
1.036
11.913
0.862
9.914
0.775
8.909
0.689
7.920
0.645
7.422
0.619
7.119
0.580
6.669
0.573
6.586
0.575
6.611
0.517
5.941
0.459
5.281
0.413
4.748
0.387
4.447
0.382
4.392
0.388
4.467
0.345
3.971
0.324
3.721
0.310
3.569
0.291
3.343
0.287
3.302
0.276
3.174
0.259
2.974
0.248
2.853
0.232
2.673
0.230
2.640
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