DMD1050TS Satellite Modem Board
Revision 1
Theory of Operation 3–38 MN-DMD1050TS
3.19 STANAG Turbo Coding
The DMD1050TS provides STANAG Turbo coding FEC for all specified baseband data rates (64
kbps to 20.0 Mbps) and modulation formats (BPSK, QPSK, 8-PSK, and 16-APSK) with the
following code rates: None, 1/2, 2/3, 3/4, 7/8, or 19/20. A decoding function for all Turbo encoded
data is also provided.
Turbo codes come extremely close to achieving the absolute maximum channel capacity, in bits
per second, for a given transmit power level. For traffic that can tolerate decoding delay and
require a low BER (i.e., 1×10–10), Turbo coding can be used. For traffic such as speech, where
excessive decoding delays cannot be tolerated and higher BER can be tolerated.
STANAG Turbo Block Sizes
Total Composite Data Rate
1024 kbps < Data Rate < 4096 kbps
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