7.10.3
Turbo decoding
The Turbo decoder is following [AD6] recommendation:
Features supported:
ASM synchronization
Data randomization removal
Payload size : 1784, 3568, 7136, 8920
Code rate = 1/2. (1/3, 1/4, 1/6 are not supported)
For more details, refer to [AD6]
7.10.4
Low Density Parity Check
The LDPC decoder is following [AD1] recommendation:
Features supported:
ASM synchronization
Data randomization removal
Block size : 1024, 4096
Code rate = 1/2, 2/3, 4/5
7.10.5
Bitrate and Overhead
In the E2R7 version and after, the bit rate configured in the demodulator corresponds to the useful bitrate.
The software automatically adjusts internal settings to match the transmitted bit rate if a FEC is activated.
Block
Code
Size
(bits)
Viterbi
Reed Solomon
2040
Reed Solomon
2040
Reed Solomon
2040
Reed Solomon
2040
Reed Solomon
2040
Turbo Code
1784
Turbo Code
3568
Turbo Code
7136
Turbo Code
8920
LDPC
1024
LDPC
1024
LDPC
1024
LDPC
4096
LDPC
4096
LDPC
4096
© Safran Data Systems – IMP000074 e14r1
RX-1 Compact Operational Receiver
User's Manual
Interleave
Code ratio
factor
-
-
1
2
3
4
5
-
-
-
-
-
-
-
-
-
-
Ref.
Is.Rev
Previous Ref.:
Date:
Expansion
Factor
1/2
2
-
259/223
-
514/446
-
769/669
-
1024/892
-
1279/1115
1/2
3640/1784
1/2
7208/3568
1/2
14344/7136
1/2
17912/8920
1/2
33/16
2/3
25/16
4/5
21/16
1/2
33/16
2/3
25/16
4/5
21/16
Safran Data Systems
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
D104047
08
-
21/06/2021
Transmitted
Useful Bit
Bit rate
rate (Mbps)
(Mbps)
1.000
2.000
1.000
1.161
1.000
1.152
1.000
1.149
1.000
1.148
1.000
1.147
1.000
2.040
1.000
2.020
1.000
2.010
1.000
2.008
1.000
2.0625
1.000
1.5625
1.000
1.3125
1.000
2.0625
1.000
1.5625
1.000
1.3125
.
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