摘 要:地空数据链是地面与飞机间的重要通信信道,在低空数据链的ARINC618 协议的附件中,定义了与MSK 信号不同的码元,影响低空数据链信号的处理与分析。在本文的研究中,首先对地空数据链信号与MSK 信号码元的一一对应关系进行了理论研究,并在此基础上,使用MATLAB 仿真技术对地空数据链信号与MSK 信号码元的转换进行研究,并采用成熟的MSK信号处理方法进行调制解调处理,最后将处理结果逆映射为ACARS 信号后,完成ACARS 的调制解调处理。
关键词:地空数据链;ARINC618 通信协议;MSK 信号编码;码元转换
中图分类号:TN911.7 文献标识码:A 文章编号:2096-4706(2019)24-0052-03
Research on Signal Processing Method of Air-Ground Data Link
WU Guangyao
(Guizhou Sub-bureau of Southwest Air Traffic Management Bureau of Civil Aviation of China,Guiyang 550000,China)
Abstract:Air-ground datalink is an important communication channel between ground and aircraft. In the annex of ARINC618 protocol of low-altitude data link,different symbols from MSK signal are defined,which affects the processing and analysis of low-altitude data link signal. In the research of this paper,firstly,,the one-to-one correspondence between the ground-air data link signal and MSK signal symbols is studied theoretically,and on this basis,MATLAB simulation technology is used to study the conversion between the ground-air data link signal and MSK signal symbols,and the mature MSK signal processing method is used for modulation and demodulation processing.Finally,after the processing result is mapped to ACARS signal inversely,it is finished modulation and demodulation processing of ACARS.
Keywords:air-ground data link;ARINC618 communication protocol;MSK signal coding;symbol conversion
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作者简介:吴光耀(1993-),男,汉族,贵州贵阳人,机务员,初级工程师,本科,研究方向:地空数据链路。