Comtech EF Data CDM-570AL - Table B-7. Versafec-2 Modcod Set - Short Block

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
FEC (Forward Error Correction) Options B–12 MN-CDM570A
Table B-7. VersaFEC-2 ModCod Set – Short Block
ModCod Mod
Code
Rate
Spectral
Efficiency
(bps/Hz)
Block
Size
(bits)
Typical *
Es/No
(SNR), for
BER = 1 x 10
-8
(dB)
Latency
(@ X
Kbps/Mbps
(ms))
Min.
Data Rate,
CCM Mode
(kbps)
Max.
Data Rate,
CCM Mode
(Mbps)
Min Sym
Rate, ACM
Mode
(ksps)
Max Sym
Rate, ACM
Mode (Msps)
00
BPSK
0.489599
0.489
800
-0.2
16 @ 128 kbps
18.1
0.490
37
1.0
01
QPSK
0.489599
0.977
1600
2.3
30 @ 128 kbps
36.2
0.979
37
1.0
02
QPSK
0.537459
1.075
1760
2.8
33 @ 128 kbps
39.8
1.075
37
1.0
03
QPSK
0.586319
1.173
1920
3.4
36 @ 128 kbps
43.4
1.173
37
1.0
04
QPSK
0.610749
1.221
2000
3.7
37 @ 128 kbps
45.2
1.221
37
1.0
05
QPSK
0.635179
1.270
2080
3.9
38 @ 128 kbps
47.0
1.270
37
1.0
06
QPSK
0.659609
1.319
2160
4.2
39 @ 128 kbps
48.8
1.319
37
1.0
07
QPSK
0.684039
1.368
2240
4.5
41 @ 128 kbps
50.6
1.368
37
1.0
08
QPSK
0.732899
1.466
2400
5.2
43 @ 128 kbps
54.2
1.466
37
1.0
09
8-ARY
0.521173
1.564
2560
5.6
46 @ 128 kbps
93.8
1.564
60
1.0
10
8-ARY
0.537459
1.612
2640
5.9
47 @ 128 kbps
96.7
1.612
60
1.0
11
8-ARY
0.561889
1.686
2760
6.2
49 @ 128 kbps
101.1
1.686
60
1.0
12
8-ARY
0.586319
1.759
2880
6.4
51 @ 128 kbps
105.5
1.759
60
1.0
13
8-ARY
0.610749
1.832
3000
6.6
53 @ 128 kbps
109.9
1.832
60
1.0
14
8-ARY
0.635179
1.906
3120
6.9
55 @ 128 kbps
114.3
1.906
60
1.0
15
8-ARY
0.659609
1.979
3240
7.2
57 @ 128 kbps
118.7
1.979
60
1.0
16
8-ARY
0.684039
2.052
3360
7.5
59 @ 128 kbps
123.1
2.000
60
1.0
17
8-ARY
0.708469
2.125
3480
7.8
61 @ 128 kbps
127.5
2.000
60
0.9
18
8-ARY
0.732899
2.199
3600
8.3
32 @ 256 kbps
131.9
2.000
60
0.9
19
16-ARY
0.586319
2.345
3840
8.7
34 @ 256 kbps
234.5
2.000
100
0.9
20
16-ARY
0.610749
2.443
4000
9.0
35 @ 256 kbps
244.3
2.000
100
0.8
21
16-ARY
0.635179
2.541
4160
9.3
37 @ 256 kbps
254.1
2.000
100
0.8
22
16-ARY
0.659609
2.638
4320
9.7
19 @ 512 kbps
263.8
2.000
100
0.8
23
16-ARY
0.684039
2.736
4480
10.3
20 @ 512 kbps
273.6
2.000
100
0.7
24
16-ARY
0.708469
2.834
4640
10.7
21 @ 512 kbps
283.4
2.000
100
0.7
25
16-ARY
0.732899
2.932
4800
11.0
22 @ 512 kbps
293.2
2.000
100
0.7
26
16-ARY
0.757329
3.029
4960
11.6
22 @ 512 kbps
302.9
2.000
100
0.7
27
16-ARY
0.781759
3.127
5120
12.2
23 @ 512 kbps
312.7
2.000
100
0.6
28
32-ARY
0.659609
3.298
5400
12.8
12 @ 1 Mbps
824.5
2.000
250
0.6
29
32-ARY
0.684039
3.420
5600
13.1
12 @ 1 Mbps
855.0
2.000
250
0.6
30
32-ARY
0.708469
3.542
5800
13.4
13 @ 1 Mbps
885.6
2.000
250
0.6
31
32-ARY
0.732899
3.664
6000
14.0
13 @ 1 Mbps
916.1
2.000
250
0.5
32
32-ARY
0.757329
3.787
6200
14.4
14 @ 1 Mbps
946.7
2.000
250
0.5
33
32-ARY
0.781759
3.909
6400
14.8
14 @ 1 Mbps
977.2
2.000
250
0.5
34
32-ARY
0.801303
4.007
6560
15.2
7 @ 2 Mbps
1001.6
2.000
250
0.5
35
32-ARY
0.830619
4.153
6800
15.8
7 @ 2 Mbps
1038.3
2.000
250
0.5
Notes:
1. *Typical Es/Lo values are shown – guaranteed values are 0.3 dB higher.
2. E
s
/N
0
(SNR) is used in place of E
b
/N
0
, a convention for comparing ACM ModCods. SNR is
defined as: E
s
/N
0
= E
b
/N
0
+ 10 * 10
log
(Spectral Efficiency)