How-add-awgn-to-signal

蜂窝基站的基本数字模型，讲述了两种小区数目的仿真结果(Basic digital model of the cellular base station)

说明：  AMplitude mod and demodulation

边缘提取技术边缘是图像对视觉的最主要特征，因此在计算机视觉技术中提出了多种检测边缘的算法。由于各种原因，图像常常受到随机噪声的干扰，经典的边缘检测的结果常常是将噪声误检为边缘点，而真正的边缘由于噪声干扰却可能被漏检。因而对于被噪声污染的图像来说，一种好的边缘检测方法应具有良好的噪声抑制能力，同时又有完备的边缘保持特性。(After analysing the soft threshold funetion,the smoothness threshold function is proposed by modifying the soft threshold function.because this function keeps smooth in the entire value range,some important details in the process of image denoising can be held. Firstly we detect the edge of the noising image. )

通过应用于小波变换到lena.jpg图像，简单实现图像压缩，实现一级压缩和二级压缩(Through applied wavelet transform to lena.jpg image, a simple image compression, compression and two compression to achieve a)

介绍MATLAB如何编程的资料,很好用的,(How to introduce MATLAB programming information, good use,)

经过改良的经验模态分解降噪方法，认为噪声为高斯噪声。(The improved empirical mode decomposition denoising method considers noise as Gauss noise.)

偏微分方程反问题的正则化方法，后验参数估计的方法(inverse problems of parabolic equations )

好不容易找到的matlab的时频分析工具箱，添加的方法不说了，里面的工具很全，挺好用的，希望对大家有帮助。(Finally found the time-frequency analysis matlab toolbox, adding that the method, which is full of tools, very good use, and would like to help everyone.)

关于MATLAB的编程和应用，及其在去除噪声中的应用，源程序的编写和修改(On MATLAB programming and applications, and its application in noise removal applications, the preparation and revision of the source code)

garch族（garch,garchs,garchsk,gjr）模型的参数模拟，以及风险值 VaR 在不同水平下的估算。(garch group (garch, garchs, garchsk, gjr) parameters of the simulation model, and the estimated risk value VaR at different levels.)