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high-resolution-one-dimension
高分辨率要求系统具有大的带宽，瞬时带宽的增加必将提高系统对硬件的要求，本文采用方便灵活的步进频率波形信号。脉间频率步进波形通过子脉冲载频的步进变化来获得大的有效带宽，使成像具有高分辨率，采用加窗和补零方法提高信噪比，但该信号对目标径向速度非常敏感。采用补零方法提高距离取样分辨率，使距离像细化，并用公式说明了补零只能提高距离取样分辨率，并不能改变频率步进信号的距离分辨能力。该信号波形对目标径向速度的敏感，使目标能量分散到邻近的距离单元造成距离分辨率下降，如果不事先进行速度补偿，直接对回波信号进行逆傅立叶变换，将使所成一维距离像发生频谱展宽，并伴有距离像发生平移。本文证明了当目标有径向速度时仍采用对回波信号直接进行逆傅立叶变换的方法将使一维距离像发生频谱展宽并伴有距离像发生频移，从而严重影响了一维距离像的质量。(high-resolution requirements of the system with large bandwidth, the increased instantaneous bandwidth will improve the system of hardware, In this paper, a flexible and convenient step frequency signals. Pulse frequency step-pulse waveform through the carrier frequency step to achieve great changes in the effective bandwidth. make imaging with high resolution, increasing the window and fill methods to improve signal-to-noise ratio is, However, the signal on the target radial velocity is very sensitive. Using zero-distance sampling method to improve resolution, so that distance as refinement, and formulates a zero-distance sampling can improve resolution, does not alter the frequency of the signal from stepping resolution capabilities. The signal waveform on the target radial velocity sens)
- 2007-04-07 22:15:33下载
- 积分：1
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schur-decomposition(real)
实对称矩阵的schur分解，编译即可运行，需要文件输入(schur decomposition for real symmetric matrix,the program can run successfully, you need a file for input)
- 2016-03-11 16:20:03下载
- 积分：1
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synchrosqueezing-master
说明： 同步压缩变换工具箱，十分强大，学习时频变换的好帮手(Synchronous compression transformation toolbox, very powerful, good helper for learning time-frequency transformation)
- 2021-04-23 21:08:47下载
- 积分：1
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UMAT_Damage
对于abaqus子程序学习的初学者，这是一个学习umat的很好算例,(Abaqus subroutine for beginners to learn, this is a good example to learn umat,)
- 2013-05-24 15:01:35下载
- 积分：1
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ImmKalman
轨迹跟踪卡尔曼滤波建立在线性代数和隐马尔可夫模型(hidden Markovmodel)上(The trajectory tracking Calman filter is based on linear algebra and hidden Markov models (hidden, Markovmodel))
- 2017-06-30 22:36:47下载
- 积分：1
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J.F.Claebout
说明： 地球物理大师Claebout的几个有用的程序，包括偏移程序。用fortran语言写的(Several geophysical Claebout Masters useful procedure, including the migration process. Fortran language used to write the)
- 2008-10-16 23:05:39下载
- 积分：1
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plrc_fdtd
一维等离子体的plrc—fdtd算法程序(one-dimensional plasma plrc- fdtd Algorithm)
- 2006-10-01 09:29:56下载
- 积分：1
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SDEshuzhiqiujie
随机微分方程求解的一个很好的参考资料，算是比较基础的，深入浅出(Stochastic differential equations of a good reference, as a relatively basic, easy to understand)
- 2014-05-28 22:37:50下载
- 积分：1
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cca
计算典型相关算法，求出最大投影向量,以及最大投影向量对应的相关系数
(calculate canonical correlations, find the largest correlation coefficients)
- 2009-09-10 17:02:58下载
- 积分：1
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test_read_file
实现了对文档的数据读入，实现了文档的数据读入(The realization of the document data read into, The realization of the document data read into, )
- 2013-08-14 02:15:23下载
- 积分：1
