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自己编的5种调制信号仿真：CPFSK,FM,AM,QPSK,SSB，希望对大家有用(Their series of 5 modulation signal simulation: CPFSK, FM, AM, QPSK, SSB, we hope to be useful)

Nonlinear Transfer Function-Based Local Approach IEEE research paper on image processing

non-local means filter 用于去噪，里面的矩阵操作编写的代码，速度比较快(non-local means filter for noise removal, inside the matrix manipulation code written faster)

this file is about risk managment in marketing....

通过设计一个二阶加权系数自适应横向FIR滤波器，对一个加随机噪声的正弦信号实现滤波。 具体设计方案为： 1，生成标准正弦信号S 2，生成等长的随机信号N 3，生成加随机噪声的正弦信号X 4，X通过参数可调数字滤波器，输出Y 5，Y与参考信号作差得到误差E 6，E通过自适应算法调整权值W 7，用LMS算法处理噪声干扰的信号，最终实现滤波器功能(A two order weighted coefficient adaptive transverse FIR filter is designed to filter a sinusoidal signal with random noise. The specific design scheme is as follows: 1, generating a standard sinusoidal signal S 2, generating an equal length random signal N 3, generating a sinusoidal signal X with random noise 4, X can adjust the digital filter by parameter and output Y 5, the difference between the Y and the reference signal is E 6, E adjusts the weight W through the adaptive algorithm 7, the LMS algorithm is used to deal with the noise interference signal, and the filter function is finally realized.)

1.灰度变换：选择一幅对比度不足的图像，对该图像进行灰度变换,增强对比度，显示增强前、后的图像以及它们的灰度直方图。 2.直方图均衡：选择一幅灰度直方图不均匀的图像，对该图像进行直方图均衡处理，显示处理前、后的图像以及它们的灰度直方图。 3.选择一幅边缘较模糊的图像，利用高通滤波器（选择或自己设计）对该图像进行边缘增强，观察增强的效果。 4.选择一幅图像，叠加零均值高斯噪声，分别利用低通滤波器、维纳滤波器和中值滤波器对该有噪图像进行滤波，显示滤波后的图 像，比较各滤波器的滤波效果。 5.选择一幅图像，叠加椒盐噪声，分别利用低通滤波器、中值滤波器对该有噪图像进行滤波，显示滤波后的图像，比较各滤波器的 滤波效果。 (err)

本PDF是对QPSK调制方式的完美解释，非常适合初学者学习，有了本材料，QPSK对你将是小菜一碟(This PDF is the perfect QPSK modulation to explain, very suitable for beginners to learn, with this material, QPSK will be a piece of cake for you)

QPSK 在瑞利信道下的调制解调的matlab仿真实现，可显示输入数据的波形表示，I支路和Q支路以及调制前、解调后、接收的波形、星座图等(QPSK modulation in Rayleigh channel demodulation matlab Simulation, the waveform can be displayed, said input data, I branch and Q branch, and before modulation, demodulation, the received waveform, constellation, etc.)

makanyabi fault in the generator

DCT数字水印算法的matlab实现，该程序反映了DCT算法的强健性和鲁棒性。(DCT watermarking algorithm of matlab, the program reflects the DCT robustness and robustness of the algorithm)