HIGH DATA RATE RECEIVER
HDR-4G+ USER’S MANUAL
Ref. DTU 100782
Is.Rev 3.5
Date: June 1, 2021
© Safran Data Systems – IMP000074 e14r1
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
CCSDS and ECSS Decoding 1.6.3.4
Reed-Solomon decoding CCSDS RS(255, 223) or RS(255, 239)
Interleave factor automatically programmed (1 to 16)
Virtual filling
R-S counters (good and bad frames, BER)
Frame Header R-S decoding CCSDS RS(10,6)
De-randomization Polynomial, initialization and offset programmable
CRC verification Frame by frame
CCSDS decommutation Yes (CADU, VCDU and Packet)
CFDP protocol Yes
LDPC Decoding 1.6.3.5
The LDPC (Low Density Parity Check code) decoders implemented inside the HDR are compatible with
the LPDC codes recommended by CCSDS (CCSDS 131.1-O-2, September 2007). Are available:
- LDPC 7/8 (mono mode after I/Q merged or dual mode on separate I and Q outputs)
- LDPC 1/2 1K, 4K and 16K
- LDPC 2/3 4K and 16K
- LDPC 4/5 4K and 16K
The LDPC decoding is an iterative process with parity decoding. In this implementation, after the last
iteration, the parity control is processed one more time. This control is able to detect bit error before
and after decoding, and elaborates a quality “Good/Bad” status of the decoding CADU.
LDPC7/8 coding can be used in synchronous or asynchronous (alias slicing, alias transport layer…
mode).
Data Output 1.6.3.6
Type of data Raw data (frame synchronizer OFF) or frames (CADU/VCDU VC extraction
capability)
Real-time data or stored data
Data interface dual 1-Gbit Ethernet (standard), dual 10-Gbit Ethernet (option)
TCP-IP
FTP (Integrated FTP server)
Ethernet data rate in TCP/IP or UDT on LAN
>700Mbps per 1Gigabit port (dual port)
>6Gbps per 10Gbit port (dual port)
Please note that such high throughput assume no other significant traffic on the
LAN
For WAN with large round trip time, UDT solution can use, please consult
factory
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