Safran CORTEX Series - Page 279

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
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 279
VITERBI DECODING
Viterbi decoder setting in QPSK, OQPSK (SQPSK) mode:
 Single- 1 I+Q Single Viterbi decoder common to I & Q Channels
 Dual – nI / nQ Separate Viterbi decoders for I & Q Channels, n is the
number of parallel decoders and can be selected between 1 and 16.
See Section 0 for more details
VITERBI
PUNCTURING
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) Puncturing scheme defined in 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
Q
Viterbi decoder setting for Q Channel in UQPSK (AQPSK, AUQPSK, AUSQPSK)
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.
VITERBI
PUNCTURING Q
Viterbi puncturing setting for Q Channel in UQPSK (AQPSK, AUQPSK, AUSQPSK)
mode:
 Off Viterbi puncturing disabled
 ON (registry) Puncturing scheme defined in 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