Safran CORTEX Series - Figure 11: Soft Decision Coding Vs I;Q Constellation (Normal Soft Output)

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 68
Note 1: Except for the QPSK mode with soft decision output, which involves only the demodulator A,
the output configuration setting for each demodulator is done from the corresponding GUI windows
(Demodulator Global Window: Output mode selection).
Note 2: Pulse corresponding to the first bit of the frame synchronizer.
Note 3: The coding of In and Qn used for the soft decision outputs is given in the following
representation of the I/Q constellation.
100
101
110
111
000
001
010
011
100
101
110
111
000
001
010
011
I
Q
Exact constellation
position depends
on AGC settings
Figure 11: Soft Decision Coding vs I/Q Constellation (Normal Soft Output)