Annex 1 Data transmission at 2 400/1 200/600/300/150/75 bit/s
over HF circuits using multi-channel voice-frequency telegraphy and PSK
1 System description
Annex 2 Data
transmission at rates up to 3 600 bit/s over HF circuits using a serial transmission modem
1 General
2 Modem operating modes
2.1
Semi-duplex
forward error correction (FEC) mode
2.2
Full-duplex
FEC mode
2.3
Automatic
repeat request (ARQ) mode
3 Technical characteristics of the modem
3.1
Modulation
3.2
Transcoding
3.3
Frame
structure
3.4
Error
correction coding, interleaving
3.5
Spectrum
of the modulated signal
3.6
Frequency
error tolerance between transmission and reception HF carriers
4 Interfaces with other
equipment
4.1
Modem
interface with the data terminal
4.2
Modem
interface with the transmitter and the receiver
4.3
Quality
of performance of associated transmitters and receivers
Annex
3 Transmission systems using PSK
1 Introduction
2 Theoretical questions
2.1
Selection
of signals
2.2
Selection
of a processing algorithm
3 Description of the system
4 Experimental
investigations
5 Conclusions
Annex 4
Mode/polarization diversity in high-frequency radio data systems
1 Introduction
2 Conclusions
Annex 5 Data
transmission at rates up to 4 800 bit/s over HF circuits using a serial PSK or quadrature amplitude modulation
(QAM) transmission modem
1 General
2
Features
3 Specification
4 Block diagram of signal
processing
5 Frame structure
6 Coding rule and constellation
diagram of 16-QAM
7 Test data
Annex
6 High data rate waveforms
3 200/4 800/6 400/8 000/9 600/12 800 bit/s using
a serial transmission modem over HF circuits
1 Introduction
1.1
Overview
1.2 Modulation
1.3 Frame structure
1.4 Coding and interleaving
1.5 Operational features and message
protocols
1.6
Performance
capabilities
1.7
Associated
communications equipment