Automatic identification system (AIS) baseband signal communication equipment

A technology of baseband signal and communication equipment, which is applied in the field of AIS baseband signal communication equipment, can solve the problems of high power consumption, complex modulation process, and inability to effectively prolong the use time of AIS baseband signal communication equipment, so as to reduce equipment power consumption and extend equipment The effect of using time

Inactive Publication Date: 2012-09-12
WUHAN UNIV OF TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the modulation process of converting the signal square wave signal B into the baseband signal C is the most complicated, it is currently necessary to use a DSP (digital signal processor, digital signal

Method used

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  • Automatic identification system (AIS) baseband signal communication equipment
  • Automatic identification system (AIS) baseband signal communication equipment
  • Automatic identification system (AIS) baseband signal communication equipment

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Embodiment Construction

[0032] Such as image 3 The shown embodiment of the AIS baseband signal communication device of the present invention includes a controller and a transmitter; the controller has a DAC function, and the main frequency requirement is only 8MHz, and the controller includes:

[0033] A processing module for converting messages into binary data,

[0034] A storage module for storing binary data and its corresponding AIS baseband signal waveform,

[0035] According to the binary data converted into by the processing module and the corresponding relationship between the binary data and the waveform in the storage module, extract the corresponding AIS baseband signal waveform in the storage module and generate a generation module for the AIS baseband signal;

[0036] The AIS baseband signal generated by the generating module is sent out through the transmitter.

[0037] AIS stipulates that in the data output stream, in order to prevent the occurrence of 6 consecutive "1", it is stip...

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Abstract

The invention relates to an automatic identification system (AIS) baseband signal communication equipment, which comprises a controller and an emitter, and is characterized in that the controller comprises a processing module for converting messages into binary data, a storage module for storing the binary data and the corresponding AIS baseband signal waveform, and a generation module for extracting the corresponding AIS baseband signal waveform from the storage module according to the binary data converted by the processing module and generating an AIS baseband signal; and the AIS baseband signal generated by the generation module is emitted by the emitter. The AIS baseband signal communication equipment has the advantages that by utilizing characteristics of the Guassian minimum shift keying (GMSK) modulated baseband signal, the controller extracts the corresponding AIS baseband signal waveform from the storage module according to the binary data to generate the AIS baseband signal, and complicated floating-point calculation is not required, so processors such as a digital signal processor (DSP) are not required; and therefore, the power consumption of the equipment is greatly reduced and the service time of the equipment is effectively prolonged.

Description

technical field [0001] The invention relates to communication equipment, especially AIS baseband signal communication equipment. Background technique [0002] Ship automatic identification system (automatic identification system, AIS) is a kind of ship navigation equipment. Through the use of AIS communication, it can reduce the collision between ships, and can enhance the functions of ARPA radar, ship traffic management system and ship report. It can be displayed on the electronic chart Displaying information such as heading, route, and navigation name of all ships greatly improves the capability of maritime communication and provides a method of voice and text communication between ships and between ships and shores for the maritime system. AIS information is transmitted based on VHF (very high frequency, very high frequency), and its fixed frequencies are 161.975MHz and 162.025MHz. Conventional AIS communication equipment is composed of man-machine interface module, comm...

Claims

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Application Information

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IPC IPC(8): G01S7/02H04L27/12
Inventor 严新平马枫初秀民柳晨光
Owner WUHAN UNIV OF TECH
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