Wavecom CODAN 3212 Manuale utente

Descripon of CODAN-3212 Data Staon

CODAN-3212 is an HF transmission mode de-

ned and developed by the same named Aus-

tralian company. This mode provides a robust

method of data communicaon over the HF

path. The mode CODAN-3212 is the successor of

CODAN-3012/CODAN-9001. The CODAN-3212

modem has dierent operaon modes. The data

can either be sent by a high-speed waveform to

address other CODAN-3212 modems, or by us-

ing the CODAN-3212 compability mode at a

low-speed to address other CODAN-3012 mo-

dems. A standard CODAN-3212 HF data staon

includes:

 a CODAN transceiver that is capable of send-

ing data by a high-speed waveform or by the

CODAN-3212 compability mode,

 an antenna system,

 an appropriate 12 Volt DC power supply,

 a 3212 HF data modem,

 a PC with terminal or applicaon soware

that provides email, chat and FTP (le

transfer protocol, standard network proto-

col used for the transfer of network data

between a client and a server) services.

A possible setup is illustrated in Figure 1. The data

staon can be installed in a base staon or in a

vehicle. The CODAN data staon can be ad-

dressed from the terminal soware of a PC, either

by plugging a cable between the serial COM port

of the PC and the Data connector on the 3212

modem, or via an Ethernet connecon between

the PC and the 3212 modem. The modem inter-

face is based on the AT industry standard, devel-

oped by the company Hayes Communicaons.

Advanced Protocols

CODAN HF Data Decoder

Fig. 1 CODAN data staon.

Advanced Protocols

Fig. 2 Peer-to-peer (unicast) vs. broadcast communicaon.

CODAN HF transceivers transmit on single side-

bands, either USB or LSB. This reduces the power

required to send HF signals and increases the

number of channels available within the HF spec-

trum. The transceivers are primarily used for long

distance communicaons. Obstrucons such as

buildings and mountains have only lile eect on

the communicaon. The HF radio waves propa-

gate in three ways simultaneously: ground wave,

direct wave and sky wave. The ground wave trav-

els near the ground for short distances up to 100

km over land and 300 km over sea. The distance

covered depends on the channel frequency, trans-

mission power and environment. The direct wave

travels in a direct line from the transmier to the

receiver. Finally, the sky wave is transmied to-

ward the sky and is reected by the ionosphere to

a distant receiver on earth.

Addionally, a handset and a speaker for acousc

monitoring, can be connected to the transceiver.

The handset has buons for

 toggling mute on or o,

 starng a call,

 switching scanning on or o, or if the user

was in a call, ends the call and turns switch-

ing on,

 manually tuning the antenna,

 adjusng the receiver frequency to compen-

sate for any frequency dierence between

the receiver and the transmier,

 selecng the mode (either USB or LSB),

 selecng the channel frequency for the com-

municaon.

CODAN HF Data Decoder

The data is passed from the terminal soware

of the PC to the 3212 modem. It is processed

by the 3212 modem and then send to the CO-

DAN transceiver for transfer via HF to the

transceivers in the communicaon system. At

the receiving node, the data is transferred

from the transceiver to the 3212 modem,

where it is decoded, and then sent to the ter-

minal soware of the PC. In order to send data

between mulple modems, the corresponding

transceivers need to be set to the same chan-

nel. A front panel LED indicator shows pres-

ence of power, modem link status and

throughput of the transmied or received da-

ta.

Prior to sending data between two modems, a

proprietary ALE (automac link establishment)

will provide automac channel selecon. CO-

DAN modems operate under full-duplex mode,

so they act as RS232 (serial communicaon

transmission of data) link between two sta-

ons once a link is established. The data be-

tween two or more CODAN-3212 modems can

either be sent by a peer-to-peer communica-

on (Selecve Repeat ARQ protocol) or by a

broadcast communicaon (Non-ARQ protocol).

The Selecve Repeat ARQ (Selecve Automac

Repeat Request) is a protocol for error detec-

on and error correcon in a data transmission

and is a specic instance of the ARQ protocol.

In a Selecve Repeat ARQ transmission, the

transming node needs an explicit conrma-

on that the data was received at the receiving

node. When the receiver detects an error in a

received frame, it automacally requests the

transmier to resend the frame, whereas in

other forms of the ARQ protocol, every frame

from that point must be sent again. This pro-

cess repeats unl the packet is error free or

the error connues beyond a predened num-

ber of transmissions and thus the communica-

on breaks down on poor condions. In a Non-

ARQ transmission, the transming node sends

packets to the receiving node, without explicit

conrmaon that the data was received at the

receiving node. In a peer-to-peer communica-

on, only two modems are involved (sender

and receiver), whereas in a broadcast commu-

nicaon all modems within a certain address

range can be addressed. The setup of a peer-to

-peer and a broadcast communicaon is illus-

trated in Figure 2. Error-free transmission is

guaranteed for peer-to-peer communicaons,

but not for broadcast communicaons in di-

cult transmission condions without the possi-

bility of repeon (ARQ). Addionally, in a

peer-to-peer communicaon the data can be

sent using a compression, which is not possible

in the broadcast mode because of the unrelia-

ble communicaon condions. A lossless com-

pression format is used for compressing CO-

DAN-3212 data stream with arbitrarily length.

Advanced Protocols

CODAN HF Data Decoder

Prior to sending data between the CODAN mo-

dems, a proprietary ALE is used for link estab-

lishment consisng an 80 Baud (symbols/sec)

Chirp signal. ALE refers to HF Automac Link

Establishment (ALE). Today most of the ALE

systems operate according to the US federal

standard (FED-STD-1045) or the higher speci-

caon Military standard (MIL-STD-188-141B).

ALE is a mechanism allowing an HF radio to au-

tomacally determine the best channel to es-

tablish a link. CODAN ALE oers convenient

features such as text messaging, GPS posion

send or request, and broadcast calling. The da-

ta staon originang a data call transmits a

Chirp sequence with signalling informaon.

This informaon causes a RING signal at the

receiving node. If the receiving node accepts

the call, an exchange of more signalling infor-

maon follows. The signalling informaon con-

tains the source and desnaon address, as

well as the parameters of each modem, such

as the serial number, the tuning and the trans-

mission mode: secure, secure interacve and

unsecure (compressed or uncompressed). In a

peer-to-peer communicaon, the sender and

the receiver exchange informaon about their

parameters, whereas in a broadcast communi-

caon only the sender sends informaon

about his parameters. Once all the signalling

informaon has been sent, the link is estab-

lished and the data transfer between the mo-

dems begins.

Advanced Protocols

CODAN-CHIRP — Automac Link Establishment

CODAN HF Data Decoder

The CODAN-3012 HF data modem provides a

fast, reliable and cost-eecve text and data

communicaon possibility for organisaons

operang in areas with unreliable telecommu-

nicaons infrastructure. CODAN-3212 compa-

bility mode is used to communicate with other

CODAN-3012 modems. The CODAN-3012

waveform transports data using a selecve re-

peat ARQ protocol. The modulaon and coding

systems incorporate design features to elimi-

nate the eects of mul-path delay, selecve

fading, frequency oset error, frequency burst,

dynamic range limitaons and protocol cross-

linking in the HF transmission. Prior to sending

data between the modems, a proprietary ALE

is used for link establishment consisng with

an 80 Baud (symbols/sec) chirp signal. The CO-

DAN-3012 waveform is modulated onto 16

tones, with a spacing of 112.5 Hz between the

channels and a bandwidth of 1800 Hz. The mo-

dem supports a user data rate of 2400 bit/sec

and the modulaon type is dierenal quater-

nary phase-shi keying (DQPSK). It further per-

mits data transfer rates up to 6000 bit/sec

(compressed) and up to 1475 bit/sec

(uncompressed). The CODAN-3012 mode sup-

ports several modes for transmission, where

the packet structure of each mode is dierent.

The dierent transmission modes are: secure,

secure interacve and unsecure (compressed

or uncompressed).

CODAN-3012 and CODAN-3212 Compability Mode

Advanced Protocols

CODAN-3212 HF data modem provides a relia-

ble, cost-eecve and high speed mobile data

communicaon in remote areas with poor tele-

communicaons 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 mes faster than

comparable modems on the market. Prior to

sending data between the modems, a proprie-

tary ALE is used for link establishment con-

sisng with an 80 Baud (symbols/sec) chirp sig-

nal. The CODAN-3212 waveform is derived

from Military Standard (MIL-STD) waveforms,

which are based on STANAG 4539 and modi-

ed to provide opmal performance over the

commercial 2.4 kHz HF channels. The CODAN-

3212 waveform transports data using the STA-

NAG-5066 protocol. The modulaon 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.

CODAN-3212 High-Speed Mode

CODAN HF Data Decoder

The modes CODAN-CHIRP, CODAN-3012 and

CODAN-3212 are implemented in the

Wavecom decoders (HF Modes → PSK &

OFDM). All of the decoders demodulate and

decode the CODAN signals, use frequency

tracking and correcon methods, verify the

CRC checksum, decompress and decode the

user data. The CODAN decoders automacally

correct small frequency deviaons from the

exact center frequency of the signal. For CO-

DAN-CHIRP, the decoder automacally iden-

es the polarity (NOR or INV), the source and

desnaon address, as well as informaon

about the serial number, the tuning and the

transmission mode (secure, secure interacve

or unsecure, compressed or uncompressed)

(Fig. 3). For CODAN-3012, the decoder auto-

macally idenes the polarity (NOR or INV),

transmission mode (secure, secure interacve

or unsecure) and the scrambling start value for

secure and secure interacve transmissions.

The decoder also indicates if the preamble has

been found and aerwards starts decoding the

data (Fig. 4). For CODAN-3212, the decoder

idenes the user data rate and the interleav-

er, and aerwards starts decoding the data.

The results can be displayed in HEX, Binary or

ASCII format. Addionally, 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).

CODAN-CHIRP, CODAN-3012 and CODAN-3212 Implemen-

taon by Wavecom

Advanced Protocols

Fig. 4 CODAN-3012 decoding output.

CODAN HF Data Decoder

Fig. 3 CODAN-CHIRP decoding output.

Fig. 5 CODAN-3012 decoding output with phase plane.

Advanced Protocols

[1] Internet hps://www.digi.com/resources/documentaon/Digidocs/9000145613/concepts/

c_point_to_mulpoint.htm

[2] Wikipedia hps://en.wikipedia.org/wiki/Selecve_Repeat_ARQ

[3] CODAN-3012 Data Modem Fact Sheet

[4] CODAN-3212 Data Modem Fact Sheet

[5] NGT Transceiver SRx, Geng Started Guide

[6] HF Data Modem 3212 User Guide

[7] Internet hps://www.codanradio.com

Reference

CODAN HF Data Decoder

Since more than thirty years Wavecom Elektronik

AG has developed, manufactured and distributed

high quality devices and soware for the decoding

and retrieval of informaon from wireless data

communicaon in all frequency bands. The nature

of the data communicaon may be arbitrary, but

commonly contains text, images and voice. The

company is internaonally established within this

industry and maintains a longstanding, world-wide

network of distributors and business partners.

Microso, Encarta, MSN and Windows are either registered trademarks or trademarks of Microso Corporaon in the United States and/or other countries. TETRA (Trans-European Trunked Ra-

dio Architecture) is a registered trademark of ETSI (European Telecommunicaon Standards Instute).

WAVECOM ELEKTRONIK AG

8090 Zurich, Switzerland

E-Mail: sal[email protected]h

Internet: www.wavecom.ch

Advanced Protocols

Minimum Recommended

CPU P4 Dual-Core 2.4 GHz Core i5 or Core i7 2.8 GHz

Memory 2 GB RAM 4 - 8 GB RAM

OS Windows XP Windows 7 32-bit or Windows 7 64-bit

Products hp://www.wavecom.ch/product-summary.php

Datasheets hp://www.wavecom.ch/brochures.php

Specicaons hp://www.wavecom.ch/product-specicaons.php

Documentaon hp://www.wavecom.ch/manuals.php

Online help

hp://www.wavecom.ch/content/ext/DecoderOnlineHelp/default.htm

hp://www.wavecom.ch/content/ext/MonitoringSystemOnlineHelp/

default.htm

Soware warranty One year free releases and bug xes, update by DVD

Hardware warranty Two years hardware warranty

Prices hp://www.wavecom.ch/contact-us.php

Product Informaon

System Requirements

Distributors and Regional Contacts

You will nd a list of distributors and regional contacts at hp://www.wavecom.ch/distributors.php

CODAN HF Data Decoder

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