Safran CORTEX RTR NeXt Series, User Manual

Page: 74 / 97

Radio Telemetry Receiver
User's Manual
Ref. D104004
Is.Rev 07
Previous Ref.: DTU000567
Date: 21/06/2021
© Safran Data Systems
– IMP000074 e14r1
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Safran Data Systems
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Page 74
6.10 FEC
6.10.1 Convolutional decoding
The convolutional decoder is using the Viterbi decoding scheme.
The code definition is given in [AD6], extract below :
Note : Punctured code is not supported.
6.10.2 Reed Solomon decoding
The RTR decoder support RS(255,223) as per CCSDS recommendation [AD6].
Features supported:

ASM synchronization

Data randomization removal

Interleaving. Depth = 1 to 8.

Virtual Filling

Concatenated decoding
For more details, refer to [AD6].
A second RS decoder is available: RS(255,239) with a specific definition for Soyuz application.
For more detail, contact Safran Data Systems.
The combination of both Convolutional and Reed Solomon decoders is available.