载波带宽与回退对照表
整个转发器的线性回退为4.5dB
| 用途 |
IP业务 |
IP业务 |
SNG |
SNG |
DTV |
SNG |
IP业务 |
IDR |
PES |
VSAT |
VSAT |
寻呼 |
| 发送天线 (m) |
9 |
9 |
1.5 |
1.5 |
9 |
1.5 |
3.8 |
4.5 |
6 |
3 |
2.4 |
4.5 |
| 接收天线 (m) |
3.8 |
6 |
9 |
9 |
2.4 |
9 |
9 |
4.5 |
2.4 |
3 |
2.4 |
1.8 |
| 信息速率 (kbps) |
44736 |
44736 |
21503 |
21503 |
8448 |
8448 |
8448 |
2048 |
512 |
256 |
64 |
19.2 |
| 调制方式 |
8PSK |
16QAM |
QPSK |
8PSK |
QPSK |
QPSK |
8PSK |
QPSK |
BPSK |
QPSK |
QPSK |
BPSK |
| FEC编码率 |
0.833 |
0.75 |
0.875 |
0.75 |
0.75 |
0.875 |
0.667 |
0.75 |
0.5 |
0.75 |
0.5 |
0.5 |
| R-S编码率 |
0.92 |
0.92 |
1 |
0.92 |
1 |
0.92 |
0.92 |
1 |
1 |
1 |
1 |
1 |
| 符号速率 (kbps) |
19450 |
16209 |
12287 |
10388 |
5632 |
5247 |
4591 |
1365 |
1024 |
171 |
64 |
38 |
| 噪声带宽 (kHz) |
23341 |
19450 |
14745 |
12466 |
6758 |
6297 |
5510 |
1638 |
1229 |
205 |
77 |
46 |
| 占用带宽 (kHz) |
27231 |
22692 |
17202 |
14543 |
7885 |
7346 |
6428 |
1911 |
1434 |
239 |
90 |
54 |
| 分配带宽 (kHz) |
27500 |
22800 |
19000 |
14800 |
8000 |
7400 |
6500 |
2000 |
1500 |
240 |
90 |
60 |
| 要求Eb/No (dB) |
8.4 |
10.0 |
8.7 |
8.0 |
7.5 |
7.2 |
7.4 |
7.5 |
6.3 |
7.5 |
6.3 |
6.3 |
| 用于36MHz转发器时 |
|
|
|
|
|
|
|
|
|
|
|
|
| 输出回退 (dB) |
5.7 |
6.5 |
7.3 |
8.4 |
11.0 |
11.4 |
11.9 |
17.1 |
18.3 |
26.3 |
30.5 |
32.3 |
| 输入回退 (dB) |
12.3 |
13.3 |
14.1 |
15.2 |
18.0 |
18.3 |
18.9 |
24.1 |
25.3 |
33.3 |
37.5 |
39.3 |
| 用于54MHz转发器时 |
|
|
|
|
|
|
|
|
|
|
|
|
| 输出回退 (dB) |
7.4 |
8.2 |
9.0 |
10.1 |
12.8 |
13.1 |
13.7 |
18.8 |
20.1 |
28.0 |
32.3 |
34.0 |
| 输入回退 (dB) |
14.3 |
15.1 |
15.9 |
17.1 |
19.8 |
20.1 |
20.7 |
25.8 |
27.1 |
35.0 |
39.3 |
41.0 |
| 用于72MHz转发器时 |
* |
* |
* |
* |
|
|
* |
|
|
|
|
* |
| 输出回退 (dB) |
8.7 |
9.5 |
10.3 |
11.4 |
14.0 |
14.4 |
14.9 |
20.1 |
21.3 |
29.3 |
33.5 |
35.3 |
| 输入回退 (dB) |
15.6 |
16.4 |
17.2 |
18.3 |
21.0 |
21.4 |
21.9 |
27.1 |
28.3 |
36.3 |
40.5 |
42.3 |
最近更新日期 00-8-3
更新者 Paul Young