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进场着陆系统多径效应激光模拟的可行性分析

Feasibility analysis of laser simulation of multi-path effect of approaching landing system

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摘要

为了研究机场进场着陆系统存在的多径效应问题,利用激光波束赋形容易实现的特点,以电磁系统缩比理论为基础,利用可控的激光发射装置发射强方向性并具有特殊要求宽度和范围的激光扫描信号模拟着陆导航系统角度制导天线的功能,对该方法的可行性从波源相似性、反射点坐标相似性、信号到达时间在时间轴上相似性、障碍物模型对激光的散射特性、相位的非精确相似等5个方面进行了深入分析,并进行实验,实验结果表明缩比环境下激光波束可以模拟出实际机场的多径效应现象,为研究进场着陆导航系统的多径效应问题探索了一条新的途径。

Abstract

To study the multi-path effect of airport approaching landing system, according to the theory of electromagnetic system in scale model, a controllable laser transmitting equipment is used to simulate the function of the angle navigation antenna of airport approaching landing system based on the feature of the laser beam, which emits well directional laser scanning signal. The feasibility of this method were analyzed in wave similarity, reflex point coordinates similarity, signal arrival time similarity in time axis, model of laser obstacles, scattering characteristics, and phase accuracy similarity. Experimental results show that the laser beam can simulate the multipath effect of real airport in scaled environment, which provides a new way for studying the multipath effect of landing navigation system.

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补充资料

中图分类号:TN27

收稿日期:2010-05-18

修改稿日期:2010-06-13

网络出版日期:0001-01-01

作者单位    点击查看

李双江:空军工程大学, 陕西 西安 710077
李云霞:空军工程大学, 陕西 西安 710077
蒙文:空军工程大学, 陕西 西安 710077

联系人作者:李双江(yanguan14@163.com)

备注:李双江(1982-),男,陕西西安人,硕士,主要从事光通信与激光技术研究工作。

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引用该论文

LI Shuang-jiang,LI Yun-xia,MENG Wen. Feasibility analysis of laser simulation of multi-path effect of approaching landing system[J]. Journal of Applied Optics, 2010, 31(6): 904-908

李双江,李云霞,蒙文. 进场着陆系统多径效应激光模拟的可行性分析[J]. 应用光学, 2010, 31(6): 904-908

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