Recommendation ITU-R M.2010-3
INTELLECTUAL PROPERTY RIGHTS
Annex 1 Operational characteristics
1 Type of messages and files
2 Broadcast modes
2.1 General broadcast
2.2 Selective
broadcast
2.3 Dedicated message
3 Broadcast priority
Annex 2 System architecture
1 The broadcast chain
1.1 System of
information and management
1.1.1 File
multiplexer
1.1.2 File
multiplexer manager
1.1.3 Shore
transmitter manager
1.2 Shore network
1.3 Shore transmitter
description
1.3.1 Shore
system architecture
1.3.2 Controller
1.3.3 Modulator
1.3.4 500 kHz
RF generator
1.3.5 RF
power amplifier
1.3.6 Transmit
antenna with matching unit
1.3.7 Global
navigation satellite receiver and a backup atomic reference clock
1.3.8 Monitoring
receiver
1.4 Transmission
channel: Radio coverage estimation
1.4.1 Propagation
channel
Annex 3 NAVDAT technical characteristics
1 Modulation principle
1.1 Introduction
1.2 Principle
1.3 Orthogonal
frequency division multiplexing parameters
1.4 Channel bandwidth
1.5 Modulation
1.6 Synchronization
1.7 Energy dispersal
1.8 Spectral occupancy
of RF signal
1.9 Sequence for
receiving scanning possibility
2 Estimated usable data rate
3 NAVDAT transmitter
performance specification
4 NAVDAT ship receiver
4.1 NAVDAT ship
receiver description
4.1.1 Receiving
antenna and global navigation satellite system antenna
4.1.2 RF
front end
4.1.3 Demodulator
4.1.4 File
demultiplexer
4.1.5 Controller
4.1.6 Control
and display unit
4.1.7 Data
interface
4.1.8 Power
supply
4.1.9 Receiver
ID
4.1.10 Stored
tables
4.1.11 Storage
4.1.12 Alert
4.1.13 Test
facilities
4.1.14 Updates
4.1.15 Scan
function
5 Minimum NAVDAT ship
receiver performance specifications
Annex 4 Transmission structure
1 Frame structure
2 Synchronization head
3 Modulation information
stream
3.1 Structure
3.2 Encoding
4 Transmitter information
stream
4.1 Structure
4.2 Encoding
4.3 Position
5 Data stream
5.1 Structure
5.2 Encoding
6 Low-density parity-check
codes
6.1 Code shortening
and puncturing
6.2 LDPC of mode A
6.2.1 LDPC
(5120,2560)
6.2.2 LDPC
(5120,3840)
6.2.3 LDPC
(2450,1225)
6.2.4 LDPC
(2450,1838)
6.2.5 LDPC
(1386,693)
6.2.6 LDPC
(1386,1040)
6.2.7 LDPC
(304,152)
6.2.8 LDPC
(304,228)
6.3 LDPC of Mode B
6.3.1 LDPC
(4598,2299)
6.3.2 LDPC
(4598,3449)
6.3.3 LDPC
(2170,1085)
6.3.4 LDPC
(2170,1628)
6.3.5 LDPC
(1200,600)
6.3.6 LDPC
(1200,900)
6.3.7 LDPC
(210,105)
6.3.8 LDPC
(210,158)
7 Cyclic redundancy check
Annex 5 Message file structure
Annex 6 Single frequency network for simultaneous broadcasting from
multiple NAVDAT locations (taken from Digital Radio Mondiale)
1 Explanation of Digital
Radio Mondiale
1.1 Single frequency
network operating mode
Annex 7 NAVDAT subject message codes
Annex 8 Implementation of NAVDAT shore infrastructure
1 Purpose of this Annex
2 Antenna characteristics of
radio towers of various heights
3 Antenna requirements for
NAVTEX and NAVDAT systems
4 NAVDAT estimated data rates
for various transmission modes