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"Statistical Sims.rar" Computing, mean, standard deviations, probability density functions, Autocorrelation functions from 1st principles of two sinusoidal waves.

matlab code to detect and identify the object feature for analysing and compraing purpose

对实域信号加窗（矩形窗、汉明窗）做DFT分析信号频谱(The real field signal plus (rectangle window, hamming window) do DFT spectrum analysis)

首先定义累计量函数，然后通过调用四阶累计量来实现有色噪声中谐波恢复，但有个缺点是信号源估计在实际应用时应有所改进！(First, the definition of cumulant function, and then by calling the fourth-order cumulant to achieve the harmonic retrieval in colored noise, but one drawback is that the signal source is estimated that in practical applications should be improved!)

fft exemple. sistem speech recognition

给音频加100hz正弦噪音，分别用巴特沃兹、切比雪夫、椭圆滤波器滤波，显示误差曲线(Plus 100hz noise to sound, respectively Butterworth, Chebyshev, elliptic filter filtering error curve)

说明：  本程序验证了通信原理中的自然抽样定理，包含源码与结果(The communication principle is verified in the natural sampling theorem, including source code and results)

该程序用于实现零相位滤波,求系统的群延迟，调用格式大大简化，通俗易懂。(This is for everyone who is major in the communication project.)

用matlab编程实现三次样条插值拟合曲线(Cubic spline interpolation curve fitting using matlab programming)

自己编写的MATLAB函数，实现对图像的旋转。B是原图像，灰度或彩色，alpha是旋转角度（角度或弧度单位均可），A是旋转后图像。旋转后图像信息尽可能不损失。(I have written MATLAB function, to achieve image rotation. B is the original image, grayscale or color, alpha is the angle of rotation (degrees or radians per unit), A is rotated images. Rotation after the image information as possible without loss.)