Safran CORTEX Series User Manual page 279

VITERBI DECODING
VITERBI
PUNCTURING
VITERBI DECODER
Q
VITERBI
PUNCTURING Q
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
Viterbi decoder setting in QPSK, OQPSK (SQPSK) mode:
 Single- 1 I+Q
 Dual – nI / nQ
number of parallel decoders and can be selected between 1 and 16.
See Section 0 for more details
Viterbi puncturing setting for I Channel in BPSK or UQPSK (AQPSK, AUQPSK,
AUSQPSK) mode or for both I & Q Channels in QPSK, OQPSK (SQPSK) mode:
 Off
Viterbi puncturing disabled
 ON ( registry)
 2/3
2/3 Viterbi
 ¾ (conv.1) 3/4 Viterbi (convention 1)
 ¾ (conv.2) 3/4 Viterbi (convention 2)
 4/5
4/5 Viterbi
 5/6(conv.1) 5/6 Viterbi (convention 1)
 5/6(conv.2) 5/6 Viterbi (convention 2)
 6/7
6/7 Viterbi
 7/8 (conv.1) 7/8 Viterbi (convention 1)
 7/8 (conv.2) 7/8 Viterbi (convention 2)
 1/4 Esrin
1/4 Viterbi (ESA / ESRIN type)
Viterbi decoder setting for Q Channel in UQPSK (AQPSK, AUQPSK, AUSQPSK)
mode:
 Off
Viterbi decoder disabled
 G1 G2 Inv
first
 G1G2
first.
 G2 InvG1
first
 G2 G1
Refer to the CCSDS recommendations for "G2 Normal/ G2 Inverted" definition.
Viterbi puncturing setting for Q Channel in UQPSK (AQPSK, AUQPSK, AUSQPSK)
mode:
 Off
Viterbi puncturing disabled
 ON (registry)
 2/3
2/3 Viterbi
 3/4 (conv.1) 3/4 Viterbi (convention 1)
 3/4 (conv.2) 3/4 Viterbi (convention 2)
 4/5
4/5 Viterbi
It cannot be duplicated or distributed without expressed written consent.
Ref.
Is.Rev
Date:
Single Viterbi decoder common to I & Q Channels
Separate Viterbi decoders for I & Q Channels, n is the
Puncturing scheme defined in registry.
Viterbi decoder enabled with G2 inverted. G1transmitted
(CCSDS recommendation)
Viterbi decoder enabled with G2 normal. G1 transmitted
Viterbi decoder enabled with G2 inverted. G2 transmitted
Viterbi decoder enabled with G2 normal. G2 transmitted first
Puncturing scheme defined in registry.
Safran Data Systems
This document is the property of
DTU 100782
3.5
June 1, 2021
.
Page 279