CDM-710G High-Speed Satellite Modem
Revision 1
Forward Error Correction Options
MN-CDM710G
11–4
Table 11-2. Occupied Bandwidth for DVB-S2 Short FECFrame = 16,200 bits
*
(QPSK 1/4, 1/3 and 2/5 are for information purposes)
Type
Inner
FEC
Code
***Es/No
At PER =
10
-7
Pilots Off
Pilots On
Spectral
Efficiency
(bps/Hz)
Normalized
Symbol Rate
(= Bit Rate x)
** Occupied
BW for
10 Mbps
(25% Rolloff)
Spectral
Efficiency
(bps/Hz)
Normalized
Symbol Rate
(= Bit Rate x)
** Occupied
BW for
10 Mbps
(25% Rolloff)
QPSK 1/4 -1.55 0.365324 2.737
31.479
0.357467
2.797
32.171
QPSK 1/3 -0.44 0.629060 1.590
18.281
0.615532
1.625
18.683
QPSK 2/5 0.50 0.760928 1.314
15.113
0.744564
1.343
15.445
QPSK 1/2 1.80 0.848840 1.178
13.548
0.830585
1.204
13.846
QPSK 3/5 3.03 1.156532 0.865
9.944
1.131661
0.884
10.162
QPSK 2/3 3.90 1.288400 0.776
8.926
1.260693
0.793
9.122
QPSK 3/4 4.83 1.420269 0.704
8.097
1.389725
0.720
8.275
QPSK 4/5 5.48 1.508181 0.663
7.625
1.475747
0.678
7.793
QPSK 5/6 5.98 1.596093 0.627
7.205
1.561768
0.640
7.363
QPSK 8/9 7.00 1.727961 0.579
6.655
1.690800
0.591
6.802
QPSK
9/10
7.22
NA NA NA NA NA NA
8PSK 3/5 6.50 1.725319 0.580
6.665
1.692033
0.591
6.797
8PSK 2/3 7.62 1.922040 0.520
5.983
1.884959
0.531
6.101
8PSK 3/4 8.91 2.118761 0.472
5.428
2.077885
0.481
5.534
8PSK 5/6 10.45 2.381056 0.420
4.830
2.335120
0.428
4.925
8PSK 8/9 11.79 2.577778 0.388
4.461
2.528046
0.396
4.549
8PSK
9/10
12.08
NA NA NA NA NA NA
16APSK 2/3 10.27 2.548792
0.392
4.512
2.505223
0.399
4.590
16APSK 3/4 11.51 2.809662
0.356
4.093
2.761633
0.362
4.164
16APSK 4/5 12.33 2.983575
0.335
3.854
2.932574
0.341
3.921
16APSK 5/6 12.91 3.157488
0.317
3.642
3.103514
0.322
3.705
16APSK 8/9 14.19 3.418357
0.293
3.364
3.359924
0.298
3.423
16APSK
9/10
14.43
NA NA NA NA NA NA
32APSK 3/4 14.03 3.493093
0.286
3.292
3.419165
0.292
3.363
32APSK 4/5 14.94 3.709309
0.270
3.100
3.630805
0.275
3.167
32APSK 5/6 15.58 3.925526
0.255
2.930
3.842446
NA
NA
32APSK 8/9 16.99 4.249850
0.235
2.706
4.159906
0.240
2.764
32APSK
9/10
17.35
NA NA NA NA NA NA
* Es/No for short FECFrame is about 0.3 dB higher than the standard. Values in the table are
approximate.
** 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.
Содержание CDM-710G
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