COMMAND RANGING & TELEMETRY UNIT CORTEX
Is.Rev.
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3.4.1.2.3. QPSK and OQPSK Modulation
3.4.1.2.3.1.
Without Convolutional Encoding
PCM encoding is disabled,
In case of external PCM input, I & Q signals must be phase-aligned, even for OQPSK
modulation (half-symbol offset on Q channel is by the IFM).
Q or OQPSK
modulation
IF
filtering
(Option)
Noise
IF
outputs
(Option)
TMS data
I/Q
Sw
itch
I out
Q out
(Option)
Q or OQPSK
modulation
IF
filtering
(Option)
Noise
IF
outputs
(Option)
TMS data
I out
I in Q in
(Option)
I out
Figure 55: High Bandwidth Uplink Scenario ( QPSK, OQPSK without Convolutional Encoding)