【雷达与对抗】【2000】【含源码】FMCW雷达测量雪层厚度的建模与仿真分析

本文为印度马德拉斯大学（作者：Sudarsan Krishnan）的硕士论文，共93页。

全球变暖是人类面临的最重要问题之一。海冰的深度和广度是全球变暖的明显指标。海冰积雪是影响海冰体积和间接全球变暖的一个重要变量。堪萨斯大学的雷达和遥感实验室开发了一种超宽带调频连续波雷达，用于测定海冰上的雪层厚度。

在任何雷达系统中，包括雪层测量雷达，来自介质的回波信号被雷达系统本身的影响所破坏，同时也受到面散射和体散射的影响。因此，不能够直接分析雷达回波信号。本文研究的重点是对雪层测量雷达进行数值分析和仿真，包括系统效应和散射效应。通过将点扩展函数引入到仿真中来考虑系统的影响，点扩展函数是通过使用原型雷达的经验测量和校准来确定的。面散射和体散射的影响从理论上进行了建模，也被纳入到模拟试验中。

本文完成的研究将有助于我们分析实际的雷达回波，并通过去卷积消除系统以及表散射和体散射的影响。对雷达回波进行去卷积，能够很准确地提取出雪层的距离信息。

Global warming is one of the most importantissues facing humanity. The depth and extent of sea-ice are clear indicators ofglobal warming. Snow cover on sea-ice is an important variable that affects thevolume of sea-ice and indirectly global warming as a whole. The Radar andRemote Sensing laboratory at the University of Kansas has developedan Ultra Wideband Frequency Modulated Continuous Wave Radar to determine snowthickness over sea-ice. In any radar system, including the snow radar, thereturn signal from the medium is corrupted by the effects of the radar system itself,and also by the effects of surface and volume scattering. Therefore, the returnsignal cannot be analyzed directly. The research described here focuses on anumerical analysis and simulation of the snow-radar that includes the effectsof the system and those of scattering. The system effects are accounted for byincluding the point-spread function into the simulation. The Point SpreadFunction is determined by empirical measurement and calibration using theprototype radar. The effects of surface and volume scattering are modeled fromtheory and are also incorporated into the simulation. This research completedhere will help us in analyzing the actual radar returns and in deconvolving theeffects of the system and the effects of surface and volume scattering. Theapplication of deconvolution on the radar return signal will help in extractingrange information easily as the layers will be clear.

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