基于PO的进近着陆系统信道环境分析和仿真预测

Analysis and Simulation Prediction on Approach Landing System Channel Environment Based on Physical Optics

针对机场环境日益复杂,进近着陆系统对于机场环境的影响十分敏感的实际问题,提出了一种基于物理光学理论(PO)的进近着陆系统信道环境分析和仿真预测方法。应用基于PO的信道散射环境分析方法,建立了系统的信号源模型和考虑信道环境影响的系统航道偏移模型,对受多散射体影响的信道环境下的进近着陆系统进行建模,结合实际问题,应用建立的模型对散射环境中的进近着陆进行了仿真,结果表明,基于PO的仿真预测方法能够较准确、合理地给出散射环境对系统的影响程度,具有预测机场配置物体对系统影响的能力。

With the airport environment gradually complicated and the fact that approach landing systems are very sensitive to the environmental effects of airport,it is necessary to perform a system simulation prediction for approach landing systems.A method for analyzing,simulating and predicting the multipath effect of approach landing systems based on Physical Optics（PO） was proposed.Applying the PO based scattering analysis method,model for the system source was derived,and method for modeling environments with multiple scatters was discussed and localizer signal detection model considering the effect of environment was established.Applying the method and models established to practice,simulation for the systems in scattering environment was performed.Simulation results show that the simulation prediction method based on PO can evaluate the disturbance of multipath scattering to the system accurately and reasonably,thus enable crews in airport to predict the disturbance of the planned building to the system.