Comtech EF Data CDM-710G - Manual (Page 163)

CDM-710G High-Speed Satellite Modem Revision 1
Forward Error Correction Options MN-CDM710G
11–3
Table 11-1. Occupied Bandwidth for DVB-S2 Standard FECFrame = 64, 800 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 -1.85 0.490243 2.040 23.458 0.478577 2.090 24.030
QPSK 1/3 -0.74 0.656448 1.523 17.519 0.640827 1.560 17.946
QPSK 2/5 0.20 0.789412 1.267 14.568 0.770627 1.298 14.923
QPSK 1/2 1.50 0.988858 1.011 11.630 0.965327 1.036 11.913
QPSK 3/5 2.73 1.188304 0.842 9.678 1.160026 0.862 9.914
QPSK 2/3 3.60 1.322253 0.756 8.697 1.290788 0.775 8.909
QPSK 3/4 4.53 1.487473 0.672 7.731 1.452076 0.689 7.920
QPSK 4/5 5.18 1.587196 0.630 7.245 1.549426 0.645 7.422
QPSK 5/6 5.68 1.654663 0.604 6.950 1.615288 0.619 7.119
QPSK 8/9 6.70 1.766451 0.566 6.510 1.724416 0.580 6.669
QPSK 9/10 6.92 1.788612 0.559 6.430 1.746049 0.573 6.586
8PSK 3/5 6.20 1.779991 0.562 6.461 1.739569 0.575 6.611
8PSK 2/3 7.32 1.980636 0.505 5.806 1.935658 0.517 5.941
8PSK 3/4 8.61 2.228124 0.449 5.161 2.177525 0.459 5.281
8PSK 5/6 10.15 2.478562 0.403 4.640 2.422276 0.413 4.748
8PSK 8/9 11.49 2.646012 0.378 4.346 2.585924 0.387 4.447
8PSK 9/10 11.78 2.679207 0.373 4.292 2.618365 0.382 4.392
16APSK 2/3 9.97 2.637201 0.379 4.361 2.574613 0.388 4.467
16APSK 3/4 11.21 2.966728 0.337 3.876 2.896320 0.345 3.971
16APSK 4/5 12.03 3.165623 0.316 3.633 3.090495 0.324 3.721
16APSK 5/6 12.61 3.300184 0.303 3.485 3.221863 0.310 3.569
16APSK 8/9 13.89 3.523143 0.284 3.264 3.439530 0.291 3.343
16APSK 9/10 14.13 3.567342 0.280 3.224 3.482680 0.287 3.302
32APSK 3/4 13.73 3.703295 0.270 3.105 3.623332 0.276 3.174
32APSK 4/5 14.64 3.951571 0.253 2.910 3.866247 0.259 2.974
32APSK 5/6 15.28 4.119540 0.243 2.792 4.030589 0.248 2.853
32APSK 8/9 16.69 4.397854 0.227 2.615 4.302894 0.232 2.673
32APSK 9/10 17.05 4.453027 0.225 2.583 4.356875 0.230 2.640
* 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.