一种基于差分极性判别的AIS船载信号解码技术  

An AIS shipboard signal decoding technique based on differential polarity discrimination

作　　者：张灵珠 程瑞 聂绪飞 刘继成 ZHANG Lingzhu;CHENG Rui;NIE Xufei;LIU Jicheng(Chengdu Zhongxing Shitong Electronic Technology Co.,Ltd.,Chengdu 610000,China;Radio Monitoring Station of Xishuangbanna Dai Autonomous Prefecture,Xishuangbanna 666100,China;Wenshan Radio Monitoring Center,Wenshan 663000,China)

机构地区：[1]成都中星世通电子科技有限公司,四川成都610000 [2]西双版纳傣族自治州无线电监测站,云南西双版纳666100 [3]文山州无线电监测中心,云南文山663000

出　　处：《通信与信息技术》2024年第4期115-118,共4页Communication & Information Technology

摘　　要：基于船舶自动识别系统(Automatic Identification System,AIS)信号格式与频谱特征,给出了一种能够对AIS船载信号进行正确解调并获取AIS报文内容的方法。利用脉冲检测获取AIS信号,通过相位差分以及频率极性判别,能够准确对AIS进行解调。进一步依据信号结构,通过寻找开始和结束标记,匹配消息ID,成功获取AIS报文数据。通过仿真分析和搭建平台实测,对采用的算法和设计方案进行了验证,表明该方法能够准确对AIS船载信号进行解码。Based on the signal format and spectrum characteristics of Automatic Identification System(AIS),this article presents a method for correctly demodulating AIS shipborne signals and obtaining the content of AIS messages AIS signals,.By using pulse detection to obtain AIS can be accurately demodulated through phase difference and frequency polarity discrimination.signal structure Further based on the,by searching for start and end markers,and then matching the message ID,AIS message content was successfully ob⁃tained.Through simulation analysis and platform testing,the algorithm and design scheme used has been validated,method can accurately decode AIS shipborne signals indicating that this method can accurately decode AIS shipborne signals.

关 键 词：船舶自动识别系统 差分极性判别 GMSK解调 译码 

分 类 号：TN98[电子电信—信息与通信工程]