PO分米波着陆系统多径环境分析和仿真

Analysis and Simulation of Multi-path Environment for Decimeter Wave Instrument Landing System Based on Physical Optics

分米波仪表着陆系统会由于地物环境的电磁散射产生多径效应,为了有效评估多径环境对系统性能的影响,应用物理光学理论(PO)对系统工作环境中存在的多径问题进行分析,建立了多径条件下的分米波仪表着陆系统模型,对系统信道环境中存在的典型散射体对航向信号的散射影响进行了分析,并建立受信道环境影响的系统航道偏移模型,通过仿真分析了不同散射条件下,系统航道对准性能的变化情况,实现了基于物理光学理论的分米波仪表着陆系统开阔场多径效应仿真。

Multi-path effect caused by electromagnetic scattering of site environment exists in decimeter wave instrument landing system.In order to evaluate the effect of multi-path to the system performance,analysis is given on the system channel environment based on Physical Optics（PO）.The model for decimeter wave instrument landing system in multipath environment is established.The effect of representative scatters that exist in the system channel environment is analyzed.Localizer signal detection model under multi-path condition is established.Simulation for the system under different multipath environment is performed to analyze the effect to the system performance,and multi-path effect simulation for decimeter wave instrument landing system is realized based on PO.