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在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来 在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频 然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫 而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号 如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了 因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频 常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。 (In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ But the signal demodulation out is very small, at this time would be passing filter to get what we need signal If design directly filter, order number be colossal, software, hardware equipment all suffer Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar.)

说明：  ANN基本知识和应用课件，MATLAB ANN源代码(ANN basic knowledge and application of courseware, MATLAB ANN source code)

说明：  一段三维重建的MATLAB代码，拿来分享！(Three-dimensional reconstruction of the MATLAB code to be shared!)

matlab gui编程 实现调用sin函数和cos函数(matlab gui)

This function downsample Hyperspectral image with Gaussian point spread function

藏在代码里的小浪漫，给你爱的ta送上一个三维立体爱心,理科生的matlab表白神器(Give he or she that you love with a three-dimensional love)

PWM整流器的直接电流控制，采用双闭环控制，调试通过，效果一般(PWM rectifier direct current control, dual-closed-loop control, debug is passed, the effect of general)

雷达回波信号的恒虚警处理，含有瑞利分布的杂波(CFAR radar echo signal processing, with Rayleigh distribution clutter)

In numerical linear algebra, the Gauss–Seidel method, also known as the Liebmann method or the method of successive displacement, is an iterative method used to solve a linear system of equations. It is named after the German mathematicians Carl Friedrich Gauss and Philipp Ludwig von Seidel, and is similar to the Jacobi method. Though it can be applied to any matrix with non-zero elements on the diagonals, convergence is only guaranteed if the matrix is either diagonally dominant, or symmetric and positive definite.

THIS CODE IS USED TO ESTIMATE EMWA VAR WITH BACKTEST