有关雷达测速的论文摘要.doc

科研训练报告 班级：电子0801 姓名：宋佩佩 学号：05081032Application of Chirp_z Transform in Infrared Spectroscopy RefinementAbstractThe spectra picture of infrared spectra in entire spectrum band can be obtained with the Fourier transform infrared spectroscopy, but sometimes only some one of the spectrums is concerned. Therefore, we need to do some spectrum thinning. The method of Chirp_z transform was used in infrared spectrum thinning, which makes the local ranges of the spectra thinned, and some of these local ranges of infrared spectra pictures were enlarged effectively. This method could realize thinning of the infrared spectra picture in any kinds of band without changing amount of the sampling points. Because the sampling resolution of these local ranges was improved, the higher precision of infrared spectra pictures could be acquired. Both the theoretical analysis and experimental results show that the method of Chirp_z transform has characteristics of high accuracy, high speed and strong flexibility, so it can be widely applied in lots of engineering projects.Chirp_z变换在红外光谱细化中的应用摘 要用傅里叶红外光谱仪对红外光谱进行测量时得到的是整个波带内的光谱图，有时我们只关心某一波段的光谱图，这时就必须对光谱图进行细化。本文将Chirp_z 变换方法用于红外光谱的细化，利用该方法的局部光谱细化能力，有效实现了红外光谱图的局部放大。该方法可以在采样点数不变的情况下实现任意波段范围内的红外光谱图的细化，同时由于局部范围内采样分辨率的提高，将获得更高精度的红外光谱图。理论推导和实验结果表明，Chirp_z 变换具有精度高、速度快和灵活性强的特点，具有很高的工程应用价值。The Polar Format Imaging Algorithm Based on Double Chirp-Z TransformsAbstractSpotlight mode offers finer azimuth resolution than that achievable in stripmapmode using the same physical antenna. The most popular spotlight synthetic aperture radar (SAR) reconstruction method is the classic polar format algorithm (PFA). However, PFA needs to perform range and azimuth interpolation operations during SAR imaging, which, in turn, affect the imaging precision and the computation efficiency. In this letter, we present a novel polar format algorithm, which may avoid interpolation operations by double chirp-Z transform. In this letter, we also analyze the nondefocus and the nondistortion constraints and discuss the along-track acceleration constraint for the PFA as well. Index TermsChirp-Z transform (CZT), polar format algorithm (PFA), synthetic aperture radar (SAR).中文翻译：摘要：与在stripmap模式下使用相同的物理天线相比，聚光灯模式提供了更精细的方位分辨率。最流行的合成孔径雷达焦点（SAR）的重建方法是典型的极坐标格式算法（PFA）。然而，极坐标格式算法(PFA)需要执行的范围和方位插值在合成孔径雷达成像,这反过来又影响成像精度和计算效率。在本文中，我们提