Wavecom CODAN 3212 Manual page 5

CODAN HF Data Decoder
Advanced Protocols
CODAN-3212 High-Speed Mode
CODAN-3212 HF data modem provides a relia-
ble, cost-effective and high speed mobile data
communication in remote areas with poor tele-
communications infrastructures. CODAN-3212
is based on the latest modem technology with
an error free data rate up to 7200 bit/sec un-
compressed, typically four times faster than
comparable modems on the market. Prior to
sending data between the modems, a proprie-
tary ALE is used for link establishment con-
sisting with an 80 Baud (symbols/sec) chirp sig-
nal. The CODAN-3212 waveform is derived
CODAN-CHIRP, CODAN-3012 and CODAN-3212 Implemen-
tation by Wavecom
The modes CODAN-CHIRP, CODAN-3012 and
CODAN-3212 are
Wavecom decoders (HF Modes → PSK &
OFDM). All of the decoders demodulate and
decode the CODAN signals, use frequency
tracking and correction methods, verify the
CRC checksum, decompress and decode the
user data. The CODAN decoders automatically
correct small frequency deviations from the
exact center frequency of the signal. For CO-
DAN-CHIRP, the decoder automatically identi-
fies the polarity (NOR or INV), the source and
destination address, as well as information
about the serial number, the tuning and the
transmission mode (secure, secure interactive
or unsecure, compressed or uncompressed)
(Fig. 3). For CODAN-3012, the decoder auto-
matically identifies the polarity (NOR or INV),
implemented in the
from Military Standard (MIL-STD) waveforms,
which are based on STANAG 4539 and modi-
fied to provide optimal performance over the
commercial 2.4 kHz HF channels. The CODAN-
3212 waveform transports data using the STA-
NAG-5066 protocol. The modulation is serial
(single-tone) 8-PSK and QAM. The modem sup-
ports the following user data rates in bit/sec:
75, 150, 300, 600, 1200, 2400, 3600, 4800,
6000 and 7200.
transmission mode (secure, secure interactive
or unsecure) and the scrambling start value for
secure and secure interactive transmissions.
The decoder also indicates if the preamble has
been found and afterwards starts decoding the
data (Fig. 4). For CODAN-3212, the decoder
identifies the user data rate and the interleav-
er, and afterwards starts decoding the data.
The results can be displayed in HEX, Binary or
ASCII format. Additionally, the decoded output
for CODAN-3212 can be displayed according to
the STANAG-5066 protocol and the quality of
the decoded CODAN-3212 signal can be visual-
ized in the phase plane (Fig. 5).
5