Policy on Intellectual Property Right (IPR)
1 Background information
2 Identification of the usable band
3 Overview of the system
4 Specifications for the 500 kHz coastal
transmitters
5 Local transmitters
6 Network
7 Type of messages
8 Type of information broadcasts
9 Encryption
10 Description of a coastal transmitting
station
11 Equipment for ship
12 Protection for broadcasting of NAVTEX on
490 kHz and 518 kHz
12.1 Transmitter emissions mask
13 Selection of 64-QAM modulation parameters
13.1 Differential coding and mapping
13.2 Filter roll-off factor
13.3 Bit error rate versus
signal-to-noise ratio for 64-QAM
14 Candidate 500 kHz digital broadcast
antennas
14.1 Practical vertical-tower
antennas
14.2 Potentially available antenna
assets from retiring legacy systems
15 Determination of the coverage range for
the broadcast data service
15.1 Radio-frequency propagation and noise
15.2 Determination of the range
achieved using NAVTEX operation
15.3 Prediction of A2 and NAVTEX
ranges (IMO performance criteria)
15.4 C/N required for
NAVTEX broadcasts
15.5 Prediction of 64-QAM broadcast
transmission range
15.6 Ship receiver performance
specifications
Ship receiver specifications:
16 Field tests
16.1 Generalities
16.2 Transmitting shore station
16.3 Broadcast emissions
16.4 Reception by the test ship
station
16.5 Results
17 Conclusions