Safran CORTEX Series - Control

HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
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It cannot be duplicated or distributed without expressed written consent.
Page 278
Control 4.5.4.5.1
Parameters in this window are described in DMU.
TCM DECODER
TCM decoder setting , in 8PSK mode:
 Off TCM disabled
 2.00/3 TCM 2.00 enabled
 2.25/3 Not implemented today
 2.50/3 TCM 2.50 enabled
 2.75/3 TCM 2.75 enabled
Inportant: TCM and Viterbi decoding are mutually exclusive.
VITERBI DECODER
Viterbi decoder setting for the I Channel in BPSK or UQPSK (AQPSK, AUQPSK,
AUSQPSK) mode or for both I & Q Channels in QPSK, OQPSK (SQPSK) mode:
 Off Viterbi decoder disabled
 G1  G2 Inv Viterbi decoder enabled with G2 inverted. G1transmitted
first (CCSDS recommendation)
 G1  G2 Viterbi decoder enabled with G2 normal. G1 transmitted
first.
 G2 Inv  G1 Viterbi decoder enabled with G2 inverted. G2 transmitted
first
 G2  G1 Viterbi decoder enabled with G2 normal. G2 transmitted first
Refer to the CCSDS recommendations for “G2 Normal/ G2 Inverted” definition.