DME/P critical area determination on message passing processors (microwave landing system mathematical model)

M. Celenk, M. Dibenedetto, J. Rajendran
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Abstract

The authors discuss research whose objective is to optimize the simulation process required for development of the precision distance measuring equipment (DME/P) critical area guidance material. This material is developed from the analysis of error contour plots, which provide the guidance system errors along the desired approach path due to signal scattering from a surface vehicle. The contour data are generated by executing the microwave landing system (MLS) mathematical model considering an interfering surface vehicle positioned at selected locations on an M*N grid and analyzing the model data as described. Optimal grid spacing is necessary to accurately describe the errors as a function of surface vehicle location while minimizing the simulation time required. A method based on the two-dimensional fast Fourier transform is described to estimate the spatial frequency spectrum of the contour data. Once spectral estimates become available, the optimal grid spacing is obtained using the Nyquist sampling theorem. To further reduce the overall processing time of this task, parallel processing is desired. A technique for parallel implementation on a Symult S-2010 message passing system is presented.<>
报文传递处理机DME/P临界区确定(微波着陆系统数学模型)
作者讨论了其目的是优化仿真过程所需的精密距离测量设备(DME/P)的关键区域制导材料的研究。该材料是从误差等高线图的分析发展而来的,该等高线图提供了由于地面飞行器信号散射导致的制导系统沿期望接近路径的误差。等高线数据是通过执行微波着陆系统(MLS)数学模型生成的,该模型考虑了位于M*N网格上选定位置的干扰地面飞行器,并对模型数据进行了分析。为了准确地描述误差作为地面车辆位置的函数,同时最小化所需的模拟时间,最优网格间距是必要的。提出了一种基于二维快速傅立叶变换的轮廓数据空间频谱估计方法。一旦谱估计可用,利用奈奎斯特抽样定理获得最优网格间距。为了进一步减少该任务的总体处理时间,需要并行处理。提出了一种在Symult S-2010消息传递系统上并行实现的技术
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