| 民航甚高频地空通信多径干扰的研究 |
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| 引用本文： | 刘旭,谢来阳.民航甚高频地空通信多径干扰的研究[J].大众科技,2014(10):43-45. |
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| 作者姓名： | 刘旭 谢来阳 |
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| 作者单位： | 民航中南空管局,广东 广州,510403 |
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| 摘 要： | 文章介绍了民航甚高频地空通信的视距传播的特点,通过数学模型阐述了多径干扰的形成条件和对通信造成的影响,分析了多径干扰导致信号衰落出现的位置与地面站天线高度和飞行高度的关系,通过确定地面主反射点,计算地面天线高度与多径干扰时延的关系,探讨了天线高度对多径干扰时延的影响,研究如何抑制多径干扰。
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| 关 键 词： | 甚高频 视距传播 反射 衰落 多径干扰 时延 |
Study on multipath interference with civil aviation VHF radio system |
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| Abstract: | This paper introduced the line-of-sight propagation characteristic of civil aviation VHF（very-high-frequency） radio system and explained the forming conditions of multipath interference and its influence to the system by the mathematical model. And also the relation between signal fading point caused by multipath interference and antennas height, aircrafts altitude is analysed. After that we analysed where the main reflected points were and calculated the delay time of multipath reflections from the main reflected points to the antennas of different height. In the end we discussed about the influence of antenna height on the delay time of multipath interference and the way how to reduce the multipath interference. |
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| Keywords: | VHF(very high frequency) line-of-sight propagation reflection fading multipath interference time delay |
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