Bem 4D 8Psk Tcm Dvb-S R-S; Vhr-Dvb-S2 And Ccsds-Sccc Standard; Oqpsk/8Psk Variable Modulation - Safran CORTEX Series User Manual

1.6.1.9

BEM 4D 8PSK TCM DVB-S R-S

This mode is compatible with the CCSDS report on BANDWIDTH-EFFICIENT MODULATIONS
(CCSDS 413.0-G-1, GREEN BOOK, March 31, 2003) with completion for updating ECSS RF &
Modulation standard ECSS E-50-05A and ECSS Telemetry channel coding ECSS E-50-01 draft 0.5.
This modulation is compatible with Pleiades, SMOS, Sentinel satellites.
 8PSK - 4D TCM trellis: output rate 2.0, 2.5 or 2.75 bits/symbol (rate 2.25 is available on
request)
 Decoder status: lock/unlock, BER estimation on corrected errors
 DVB-S Transport layer: synchronisation, randomization, DVB-S RS or RS(239,255) decoding ,
Interleaving
 Transport layer control parameter: ON/OFF, discard idle frames ON/OFF
 Transport layer status: lock/unlock, number of R-S correction, idle frames counter, corrected R-
S CADU counter (good/bad CADU), dropout events.
1.6.1.10

VHR-DVB-S2 and CCSDS-SCCC standard

The Cortex HDR supports the future variable modulation and coding standards for high rate telemetry:
 DVB-S2 standard: ETSI EN 302 307 V1.1.2, Digital Video Broadcasting, second generation
framing structure, channel coding and modulation systems for Broadcasting, Interactive
Services, New Gathering and other Broad band satellite applications.
 S2-Extensions (DVB-S2X): BlueBook A83-2 / EN302307-2
 CCSDS SCCC standard: CCSDS 131.2-R-1, Flexible advanced coding and modulation scheme
for high rate telemetry applications.
 CCSDS SCCC Extension (SCCC-X): CCSDS 131.20-O
1.6.1.11

OQPSK/8PSK variable modulation

The Cortex HDR supports variable QPSK/8PSK modulation scheme used by specific satellites.
The on line switching between the following modulation modes is supported:
OQPSK with differential NRZ-M coding on each I and Q branches
-
- 8PSK with specific differential coding on the symbols.
It has to be noted that the input symbol rate is constant. The demodulator of the HDR recognizes the
current modulation mode and switch automatically in the corresponding configuration (demodulation
mode and differential decoding).
Whatever the current modulation can be at a given time, the demodulated data are output on the same
two parallel ECL ports (Output mode = Split 2). The output clock rate is adjusted consequently.
This variable modulation mode is supported with the demodulator menu number 17.
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
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It cannot be duplicated or distributed without expressed written consent.
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
Safran Data Systems
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