Digital Signal Processing Reference
In-Depth Information
14.33. In practice (symbol rate of 27.5 MS/s), they are about 49 Mbit/s.
Samples of data rates are listed in Table 14.3.
Table 14.2. Coding parameters in DVB-S2
LDPC
code rate
k BCH
k LDPC
t BCH
FEC frame
¼
16008
16200
12
64800
1/3
21408
21600
12
64800
2/5
25728
25920
12
64800
½
32208
32400
12
64800
3/5
38688
38880
12
64800
2/3
43040
43200
10
64800
¾
48408
48600
12
64800
4/5
51648
51840
12
64800
5/6
53840
54000
10
64800
8/9
57472
57600
8
64800
9/10
58192
58320
8
64800
¼
3072
3240
12
16200
1/3
5232
5400
12
16200
2/5
6312
6480
12
16200
½
7032
7200
12
16200
3/5
9552
9720
12
16200
2/3
10632
10800
12
16200
¾
11712
11880
12
16200
4/5
12432
12600
12
16200
5/6
13152
13320
12
16200
8/9
14232
14400
12
16200
9/10
NA
NA
NA
16200
Table 14.3. Sample data rates in DVB-S and DVB-S2 with a symbol rate of 27.5
MS/s
Standard
Modulation
CR
Pilots
Net data rate
[Mbit/s]
DVB-S
QPSK
¾
--
38.01
DVB-S2
QPSK
9/10
On
48.016345
DVB-S2
QPSK
9/10
Off
49.186827
DVB-S2
QPSK
8/9
On
47.421429
DVB-S2
QPSK
8/9
Off
48.577408
DVB-S2
8PSK
9/10
On
72.005046
DVB-S2
8PSK
9/10
Off
73.678193
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