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CDM-710 Broadcast Satellite Modem
Revision 11
Forward Error Correction Options MN/CDM710.IOM
7–5
Table 7-3. 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
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)
Pilots Off
Pilots On
QPSK
1/4 -1.55 0.365324 2.737 31.479 0.357467 2.797 32.171
1/3 -0.44 0.629060 1.590 18.281 0.615532 1.625 18.683
2/5 0.50 0.760928 1.314 15.113 0.744564 1.343 15.445
1/2 1.80 0.848840 1.178 13.548 0.830585 1.204 13.846
3/5 3.03 1.156532 0.865 9.944 1.131661 0.884 10.162
2/3 3.90 1.288400 0.776 8.926 1.260693 0.793
9.122
3/4 4.83 1.420269 0.704 8.097 1.389725 0.720
8.275
4/5 5.48 1.508181 0.663 7.625 1.475747 0.678
7.793
5/6 5.98 1.596093 0.627 7.205 1.561768 0.640
7.363
8/9 7.00 1.727961 0.579 6.655 1.690800 0.591
6.802
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
2/3 7.62 1.922040 0.520 5.983 1.884959 0.531
6.101
3/4 8.91 2.118761 0.472 5.428 2.077885 0.481
5.534
5/6 10.45 2.381056 0.420
4.830 2.335120 0.428
4.925
8/9 11.79 2.577778 0.388
4.461 2.528046 0.396
4.549
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
3/4 11.51 2.809662 0.356
4.093 2.761633 0.362
4.164
4/5 12.33 2.983575 0.335
3.854 2.932574 0.341
3.921
5/6 12.91 3.157488 0.317
3.642 3.103514 0.322
3.705
8/9 14.19 3.418357 0.293
3.364 3.359924 0.298
3.423
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
4/5 14.94 3.709309 0.270
3.100 3.630805 0.275
3.167
5/6 15.58 3.925526 0.255
2.930 3.842446 NA
NA
8/9 16.99 4.249850 0.235
2.706 4.159906 0.240
2.764
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-710
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Страница 26: ...CDM 710 Broadcast Satellite Modem Revision 11 Preface MN CDM710 IOM xx Notes ...
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Страница 230: ...CDM 710 Broadcast Satellite Modem Revision 11 Appendix A MN CDM710 IOM A 56 Notes ...
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