Digital-signal-processing

此程序描述了基于梯度投影重建的稀疏方法切用matlab实现( This passage describes Gradient Projection for Sparse Reconstruction use matlab.)

本书是关于模式识别与机器学习的一本经典教材，其中更对贝叶斯原理做了详细的描述，更能帮助读者了解贝叶斯方法在模式识别中的重要作用。(This book is a classic textbook on pattern recognition and machine learning abroad, in particular the principle of Bayesian detailed description.)

calcules the harmonic,mean square root and geometric mean

说明：  信号实验常用的simulink模型和mfile,可直接在matlan下运行。(Simulink signals commonly used in experimental models and mfile, can be run directly in matlan.)

说明：  OFDM的实现流程 比较详细的输入和输出编解码(for OFDM process)

crc check implementation, galois fiels illusteation

用MATLAB编写的混沌序列图像加密程序,加密密钥跟解密密钥(MATLAB prepared by the chaotic sequence image encryption program, encryption key and decryption key)

simulink仿真的s函数例程，实现了一个简单的线性系统(s function of the simulink simulation routines to implement a simple linear system)

利用pcnn，每当有一批像素对应的神经元点火，对像素值进行一次修正。第n次点火的所有神经元用矩阵B（n）表示， 已经点火的像素位置标记为‘1’，未点火的标记为‘0’。通过一个3*3的模板滑过B（n），判断若模板内的值全为‘1’或全为‘0’， 则这些像素值不进行处理，否则若模板中心的值为‘1’，则增加该位置的像素值的大小，中心值为‘0’，则减小像素值。该功能由xiugai(B,K)函数实现 Beta取负值来抑制周围的神经元点火，因为输入pcnn（X）的是模糊图像，抑制之后使处理的像素值更加接近原图像的像素值（抑制参数通过试验确定，并不精确） 总之运行结果只是对像素值变化较大的边缘区域进行了像素值的修正。 通过不断调整参数使峰值信噪比有所升高，但是升高得不是太多(Use pcnn, whenever a group of pixels corresponding to the firing of neurons, a correction value for the pixel. Ignition of all the n-th neuron matrix B (n) represents, Already ignition pixel position labeled 1 , unfired labeled 0 . By a 3* 3 templates over the B (n), determines if the value within the template are all 1 or all 0 , These pixel values are not processed, otherwise the value if the template center 1 , then the increase in the size of the pixel values of the position, the center value of 0 , the pixel value is reduced. This function is implemented by xiugai (B, K) function Beta is a negative value around the element to inhibit neuronal firing, because the input pcnn (X) is a blurred image, the pixel values of inhibition after treatment of the pixel value closer to an original image (suppression parameter determined by experiment, is not exact) Results only in short run large changes in the edge region of the pixel values of the corrected pixel values. )

实现补长可变的LMS程序，并给出了学习曲线的绘制程序，对大家应该有帮助的！(Realize variable length LMS fill procedures, and given the learning curve of the mapping procedures, the U.S. should have helped!)