AIS信号解调及其信息恢复

作者：黄 标1，尚俊娜1*，陆 辉2 日期：2010-11-22/span> 浏览：4309 查看PDF文档

AIS信号解调及其信息恢复

黄 标1，尚俊娜1*，陆 辉2

（1.杭州电子科技大学 通信工程学院，浙江 杭州 310018； 2.中国电子科技集团第36研究所，浙江 嘉兴 314001）
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摘要：船舶自动识别系统(AIS)广泛应用于实际船舶通信系统中，实现船舶交通管理系统的船-岸、船-船的通信及辅助导航，避免船舶间碰撞，用于提高航行的安全。针对获取船舶状态信息的需求，研究了AIS信号进行解调和信息恢复技术。首先介绍了AIS信号模型和解调原理，详细讨论了实际接收的AIS信号解调方法，采用相位差分解调方法实现解调，最后根据AIS协议给出了原始信源信息恢复方法，并根据实际采集的AIS信号，进行了解调和信息恢复实验。研究结果表明上述方法是有效的。
关键词：船舶自动识别系统；GMSK；解调；协议
中图分类号：TH766
文献标识码：A文章编号：1001-4551(2010)10-0123-04

Demodulation and information recovery of AIS signal
HUANG Biao1, SHANG Junna1, LU Hui2
(1. School of Communication Engineering, Hanghzhou Dianzi University, Hangzhou 310018, China; 
2. NO.36 Reasearch Institute of CETC, Jiaxin 314001, China)
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Abstract: Automatic idenification system(AIS) is already widely used in shipping communication systems to communicate between AIS base station and ship ,ship and ship,assist navigation in marine traffic management system with the intention of making marine navigation safer. Aiming at meetting the requirements of getting the original information of ships, demodulation and information recovery techniques of AIS signals were researched. Firstly, the model and the demodulation principle of AIS signal were introduced .Then the demodulation method for received AIS signal was discussed in detail and AIS signal was demodulated with the method of phase difference,the original transmitted information recvoery method based on AIS protocal specifications was presented. Finally experiments of demodulation and information recovery were done to the received AIS signal. The results indicate that the presented method is effective.
Key words: automatic idenification system(AIS); GMSK; demodulation; protocal