Fecf; Modulation Unit; Main Features; Constellation Mapping - Safran CORTEX Series User Manual

3.6.1.2.5

FECF

The FECF insertion can be entirely customized (Cf. CCSDS 100.0-G-1) in terms of:

Initialization

Generator polynomial
3.6.2

Modulation Unit

3.6.2.1

Main features

The data streams can be modulated with the following characteristics:

Various basic modulation schemes: BPSK, (U/O)QPSK, 16APSK, 16QAM, 32APSK, 64APSK,
GMSK. The modulation can be ON or OFF

Carrier Frequency is configurable

Advanced modulation schemes: DVB-S2 and SCCC(-X) (according to CCSDS 131.2-B-1 and
CCSDS 131.20-O)

2SR and 4SR FIR pulse-shaping filter (typ. RRC and GMSK filter with adjustable roll-off/BT)

NRZ-L/M/S, Bi-Phase and programmable DNRZ support

Convolutive encoding schemes for (O)QPSK (single, dual, parallel up to 16, with many
puncturing available) and 8PSK (TCM with rates 2/3, 2.25/3, 2.5/3, 2.75/3, 4D-DSNG)

Symbol rate up to 2 Gsps depending on the configuration
The test unit supports all the features of the demodulator. Please refer to section 3.3
overview of the Viterbi and puncturing schemes, TCM encoding and so on.
3.6.2.2

Constellation Mapping

In QPSK mode, two mapping are supported:
© Safran Data Systems – IMP000074 e14r1
HIGH DATA RATE RECEIVER
HDR-4G+ USER'S MANUAL
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
for a complete
Safran Data Systems
.
Page 159