Radar coverage over irregular terrain: A practical algorithm for multipath propagation

R. A. Carolina Flores, G. F. Almeida, G. Rodrigues Tejerina, G. Fraidenraich, J. Candido, M. D. Yacoub, M. A. M. Miranda, A. Bertetich, J. R. Moreira Neto
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引用次数: 2

Abstract

In this paper, the impact of the multipath reflections over irregular terrain profiles on the performance of radar detection is analyzed through the prediction of detection coverage in a radar system. To this end, we propose a geometric algorithm for the search of reflection rays over real irregular terrain, which is described by the earth's curvature, shadowing regions, and the knowledge of the target positions. The reflection points are based on the difference between incident and reflected grazing angles as a function of the range parameter. The analytical formulation is given by an ordinary differential equation (ODE), which improves the solution by incorporating non-linear modeling into irregular terrain surface. The probability of detection is quantified by the Marcum-Q function for a set of targets, which is extended to contain the effect of the antenna pattern on the multipath environment for a given signal-to-noise ratio value and probability of false alarm. Figures present vertical profiles and 360 degrees coverage. The new solution reveals the strong influence of the topographic profile on the multipath phenomenon and consequently on the detection probability performance of radar system.
不规则地形雷达覆盖:一种实用的多径传播算法
本文通过对雷达系统探测覆盖的预测,分析了不规则地形剖面上的多径反射对雷达探测性能的影响。为此,我们提出了一种搜索真实不规则地形反射射线的几何算法,该算法由地球曲率、阴影区域和目标位置的知识来描述。反射点是基于入射和反射掠射角之间的差作为距离参数的函数。采用常微分方程(ODE)的解析表达式,将非线性建模纳入不规则地形,改进了求解方法。检测概率由一组目标的Marcum-Q函数量化,该函数扩展到包含给定信噪比值和虚警概率下天线方向图对多径环境的影响。数字显示垂直轮廓和360度覆盖。新解揭示了地形剖面对多径现象的强烈影响,从而对雷达系统的探测概率性能产生影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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