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Wide and narrow beam cooperative satellite-borne AIS message real-time receiving and processing system

A processing system and real-time receiving technology, applied in the field of aerospace vehicles, can solve the problems of not having the ability to extract key information of messages, fixed antenna beam coverage, and poor regional adaptability. high degree of effect

Pending Publication Date: 2020-11-13
SHANGHAI SATELLITE ENG INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its antenna beam coverage is fixed, and its adaptability to areas with different ship densities is not strong. At the same time, it does not have the ability to extract key information from messages, and its intelligence is low.

Method used

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  • Wide and narrow beam cooperative satellite-borne AIS message real-time receiving and processing system
  • Wide and narrow beam cooperative satellite-borne AIS message real-time receiving and processing system
  • Wide and narrow beam cooperative satellite-borne AIS message real-time receiving and processing system

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Embodiment Construction

[0038] specific implementation plan

[0039] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0040] Such as figure 1 As shown, the embodiment of the present invention provides a system for receiving and processing spaceborne AIS messages in real time with coordinated wide and narrow beams. Cooperative design of wide and narrow beams is adopted: 4 pairs of VHF frequency band antennas form an antenna array, and the multi-beam forming network enables the antenna array to form a number of 1 wide beam and 4 narrow beams to receive AIS signals, and use different...

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Abstract

The invention provides a wide and narrow beam cooperative satellite-borne AIS message real-time receiving and processing system, which comprises: a wide and narrow beam cooperative module, wherein a plurality of VHF frequency-band antennas form an antenna array, multiple wave beams form a network to enabling the antenna array to form a plurality of wide and narrow beams to receive AIS signals; anda multi-channel parallel processing module which adopts a multi-channel AIS receiver, wherein each channel processes the AIS signal received by a single wave beam, filtering, amplification and sampling of the signal, demodulation of a message and extraction of important information of a ship are completed, and meanwhile, the multi-channel parallel processing module has a signal time slot conflictresolution capability. By means of simultaneous receiving of wide and narrow beams, multichannel parallel processing, on-board extraction of important information, synchronization of message second information and satellite time and the like, the system has the advantages of comprehensively improving the ship target detection rate, extracting ship simplification information, obtaining accurate timestamps of messages and the like.

Description

technical field [0001] The invention relates to the technical field of aerospace vehicles. Specifically, it relates to a system for receiving and processing space-borne AIS messages in real time with coordinated wide and narrow beams. Background technique [0002] Automatic Identification System (AIS system for short) refers to a new type of navigation aid system applied to maritime safety and communication between ship and shore, ship and ship. Adopt GMSK modulation, automatically and continuously send static data, navigation-related information and safety information, etc. in the VHF frequency band at sea in SOTDMA communication mode, and at the same time automatically receive these information from surrounding ships, and exchange information with coastal base stations. The SOTDMA protocol stipulates that each SOTDMA communication cell is limited to a range of about 20 nautical miles. In the same cell, the communication time slots between users do not overlap, so there wi...

Claims

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/18521H04B7/1851
Inventor 王瀚霆徐侃陈占胜成飞范凯游月辉范迎春宋玉亭桑峰
Owner SHANGHAI SATELLITE ENG INST
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