Safran CORTEX CRT Quantum User Manual page 243

IF
S (t)
Receiver
rx
To configure the Doppler Aid module, The Doppler Rate Aid / Doppler Aid parameter is set to "Doppler", and the
Carrier Doppler shift / Tone Doppler shift is set appropriately depending upon the satellite operation (Coherent vs
Non Coherent).
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ambiguity resolution module :
Minor tones processing
Rough delay estimation :
N = number of 2

X (t)
RG_rx Rone
f
tx_tone
Major tone
synthesizer
Figure 78: Doppler Aid Architecture
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Ranging Major Tone tracking

-rotations on the Major tone
(t)
Low pass &
decim. filter
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
  
(t) = (t) + 2 N

Rone Rone mod2
Phase
accumulator
PLL
filter

(t)
residual
VCO

(t)
Rone
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