Research Article
Satellite Media Broadcasting with Adaptive Coding and Modulation
Table 1
MODCOD combinations used.
| MODCOD no. | Constellation | FEC Code rate | Operating threshold (dB) | Spectral efficiency (bits/symbol) |
| 1 | QPSK | 1/2 | 1.0 | 0.98 | 2 | QPSK | 2/3 | 3.1 | 1.32 | 3 | QPSK | 4/5 | 4.68 | 1.58 | 4 | 8PSK | 3/5 | 5.5 | 1.78 | 5 | 8PSK | 3/4 | 7.91 | 2.23 | 6 | 8PSK | 8/9 | 10.69 | 2.64 |
|
|