Single Or Dual Viterbi Decoder; Figure 15: Viterbi Decoding Module. Single & Dual Operating Modes - Safran CORTEX Series User Manual

3.3.3.2

Single or Dual Viterbi Decoder

The Viterbi decoding module can operate either in single mode or in dual mode:
 In the single mode, there is only one Viterbi decoder connected to the Demodulator module (I
& Q output channels of the demodulator are connected to G1 & G2 inputs of the Viterbi
decoder).
 In the dual mode, the Viterbi decoding module has two separate Viterbi decoders on I and Q
Channels.
IF input
IF input
Figure 15: Viterbi Decoding Module. Single & Dual Operating Modes
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
Vector Demodulator
I channel
QPSK, OQPSK
Q channel
Vector Demodulator
I channel
QPSK, OQPSK
UQPSK,
BPSK (I only)
Q channel
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
Viterbi Decoding Module
G1
Viterbi
decoder
G2
Viterbi Decoding Module
G1
-1
Z
I channel
Viterbi
decoder
G2
G1
Z -1
Q channel
Viterbi
decoder
G2
Safran Data Systems
Data
.
Page 87