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1、科研训练报告班级：电子0801姓名：宋佩佩学号：05081032ApplicationofChirp_zTransforminInfraredSpectroscopyRefinementAbstractThespectrapictureofinfraredspectrainentirespectrumbandcanbeobtainedwiththeFouriertransforminfraredspectroscopy,butsometimesonlysomeoneofthespectrumsisconcerned.The
2、refore,weneedtodosomespectrumthinning.ThemethodofChirp_ztransformwasusedininfraredspectrumthinning,whichmakesthelocalrangesofthespectrathinned,andsomeoftheselocalrangesofinfraredspectrapictureswereenlargedeffectively.Thismethodcouldrealizethinningoftheinfraredspec
3、trapictureinanykindsofbandwithoutchangingamountofthesamplingpoints.Becausethesamplingresolutionoftheselocalrangeswasimproved,thehigherprecisionofinfraredspectrapicturescouldbeacquired.BoththetheoreticalanalysisandexperimentalresultsshowthatthemethodofChirp_ztransf
4、ormhascharacteristicsofhighaccuracy,highspeedandstrongflexibility,soitcanbewidelyappliedinlotsofengineeringprojects.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
5、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。ThePolarFormatImagingAlgorithmBasedonDoubleChirp-ZTransformsAbstract—Spotlightmodeoffersfinerazimuthresolutionthanthatachievableinstripmapmodeusingthesame
6、physicalantenna.Themostpopularspotlightsyntheticapertureradar(SAR)reconstructionmethodistheclassicpolarformatalgorithm(PFA).However,PFAneedstoperformrangeandazimuthinterpolationoperationsduringSARimaging,which,inturn,affecttheimagingprecisionandthecomputationeffic
7、iency.Inthisletter,wepresentanovelpolarformatalgorithm,whichmayavoidinterpolationoperationsbydoublechirp-Ztransform.Inthisletter,wealsoanalyzethenondefocusandthenondistortionconstraintsanddiscussthealong-trackaccelerationconstraintforthePFAaswell.IndexTerms—Chirp-
8、Ztransform(CZT),polarformatalgorithm(PFA),syntheticapertureradar(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
