the-Null-Preprocessing-Algorithm

计算信噪比的程序，可以直接调用，方便而且简单。(SNR calculation procedure can be called directly, convenient and simple.)

PCA技术的一大好处是对数据进行降维的处理。我们可以对新求出的“主元”向量的重要性进行排序，根据需要取前面最重要的部分，将后面的维数省去，可以达到降维从而简化模型或是对数据进行压缩的效果。同时最大程度的保持了原有数据的信息。 (A major advantage of PCA technology is reduce the dimension of the data processing. We can calculate the new " principal component" vector order of importance, according to need to take the most important part of the front, eliminating the rear of the dimensions, dimension reduction can be achieved to simplify the model or the effect of data compression . At the same time maintaining the greatest degree of the original data.)

DNN identifier with sigmoidal functions

说明：  本源代码可以对提取的光强度信息转换为频域信息，可以做分析之用(Origin of the code can be extracted light intensity information is converted to frequency domain information and analysis can be done with)

说明：  《MATLAB 7.0编程基础》第7章 （源码实例）主要讲解MATLAB句柄图形对象("MATLAB 7.0 programming foundation" Chapter 7 (source code examples) mainly on MATLAB handle graphical object)

MATLAB code for OFDM Transmission

This code is used for extracting texture features in an image

用MATLAB语言实现的卷积码编码，维特比译码(With the MATLAB language implementation of the convolutional coding, Viterbi decoding)

说明：  《现代通信系统使用MATLAB（第二版）》书中的例子打包。(communication systerm)

说明：  在支持向量机中用于交叉核对的matlab程序。精度较高(In support vector machines used to cross-check the matlab program. High precision)