On-sea intermediate frequency digital broadcasting system

Abstract

The invention discloses an on-sea intermediate frequency digital broadcasting system, comprising: an information management sub-system used to collect and control various kinds of on-sea security information, to create the information files requiring to be transmitted, and to create the emission sequence according to the priorities and the repetitive requirement of the files; an offshore broadcasting and transmitting station to receive and convert the information files from the information management sub-system into an OFDM signal and broadcasting the RF signal to a ship through antenna radiations; and a ship mounted receiver to receive wireless electric signals, to modulate the OFDM signal, to re-create the information files, and according to the application classification of the information files, to display the information contents or provide the information files to a designated device. The information management sub-system and the offshore broadcasting and transmitting station are connected through an offshore network; the offshore broadcasting and transmitting station is connected with the ship mounted receiver through a wireless transmission channel. The on-sea intermediate frequency digital broadcasting system proposed by the invention is able to make the ship information system and the device connected in a seamless manner; and therefore, the broadcasting and transmitting efficiency is high; the coverage is wide and the requirement for broadcasting and transmitting various kinds of MSI data can be fulfilled.

Description

technical field [0001] The invention relates to a marine safety information broadcasting system, in particular to a marine intermediate frequency digital broadcasting system. Background technique [0002] In order to ensure the safety of navigation, it is necessary to provide timely and effective safety information about maritime navigation from the shore to ships sailing. Maritime Safety Information (MSI---Maritime Safety Information) refers to navigation warnings, weather reports, weather forecasts and information related to navigation safety. Additional emergency safety information. Relevant departments on shore broadcast important information about navigation safety to ships in major sea areas through NAVTEX coast station or INMARSAT. [0003] The existing navigational warnings and notices to navigation are mainly through the coastal stations broadcasting Morse telegrams and NAVTEX broadcasting NBDP radio telex to realize the release of information. These two informatio...

AI Technical Summary

Problems solved by technology

[0004] 1) Low broadcast efficiency

Due to the low broadcast rate of NAVTEX, it takes a long time to broadcast, and sometimes broadcasts overtime, occupying the broadcast time of other countries. Japan once raised opinions on this;

[0005] 2) It cannot meet the requirements for broadcasting various MSI data;

[0006] 3) Failure to meet the requirements for broadcasting new maritime business data;

[0007] 4) Multimedia information cannot be broadcast;

[0008] 5) It cannot be seamlessly connected with the ship information system and equipment, requiring manual operation

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