摘要
研究了现有的VHF频段的船用自动识别系统在超小或微型卫星应用中的若干关键技术。阐述了大气层、降雨、多径失真、多普勒频移对星载AIS通信的影响,接收到的星载AIS信号的载噪比以及星上天线的设计等。研究结果表明,多普勒频移对于星载AIS通信的影响是最主要的,而大气和气侯情况对星载AIS通信的影响则较小。
In this paper, some key techniques application on shipborne AIS to satellite have been investigated. The influence of the ionosphere, rain, multipath distortion, Doppler shift, the CNR of received signal and the design of the antenna used in the satellite are described. The result of studies shows that the effect of Doppler shift plays a major role for satellite-based AIS communication, while the ionosphere and weather affect the communication very little.
出处
《航空电子技术》
2007年第4期7-11,共5页
Avionics Technology
基金
上海市科技发展基金资助项目(项目编号065115016)
