2 advanced forward error correction and modulation, 3 bandwidth compression – Comtech EF Data DMD-2050E User Manual
Page 33
DMD2050E Universal Product Modem
Introduction
MN-DMD2050E Revision 2
1– 3
•
Switchable between spur-free 70/140 MHz and L-Band operations
•
AC or DC Power Input
•
Functions in virtually all Military and Commercial Satellite IP, Telecom, Video and Internet
applications
•
Military standards include:
•
MIL-STD-188-165A
•
STANAG 4486 Edition 3
•
MIL-STD-188-16B (Draft Standard)
•
OM73
•
Commercial standards include:
•
IDR
•
IBS
•
DVB
1.2.2 Advanced Forward Error Correction and Modulation
The DMD2050E has bandwidth-efficient, advanced forward error correction (FEC). Advanced
FEC options include:
•
Low Density Parity Check (LDPC)
•
Turbo Product Codes (TPCs)
•
165B Turbo Codes
Legacy functions for Viterbi, Trellis, Concatenated Viterbi Reed-Solomon, and Sequential FEC
are included.
Modulation types include:
•
BPSK
•
8-PSK
•
16-QAM
•
QPSK
•
8-QAM
•
16-APSK
•
OQPSK
1.2.3 Bandwidth Compression
DoubleTalk
®
Carrier-in-Carrier
®
bandwidth compression reduces satellite bandwidth requirements
and increases throughput without using additional transponder resources.