Differential Coder - Safran CORTEX CRT Quantum User Manual

3.3.6.3.3. Differential Coder

The differential coder depicted in Figure 20 is used to eliminate phase ambiguity on carrier synchronization for
each modulation efficiency. Table 10 gives the bit reference at input and output of the differential coder in each
case.
An example of differential encoder connections is given in Figure 20 for the 2 bits/channel-symbol case. The
structure of the modulo 8 adder is also shown; it is applicable to both the coder mapper and differential coder.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
Page 66