MATLABshejiyuyingyong

说明：  GPS星历的数据格式，是GPS进行后期数据处理的重要文档。(the data format of the gps Ephemeris)

说明：  设计一个2FSK数字调制系统，要求： （1）设计出规定的数字通信系统的结构； （2）根据通信原理，设计出各个模块的参数（例如码速率，滤波器的截止 频率等）； （3）用Matlab或SystemView 实现该数字通信系统； （4）观察仿真并进行波形分析； （5）系统的性能评价。 (Design a digital modulation system 2FSK require: (1) design a digital communication system under the structure (2) According to the communication theory, design parameters of each module (such as code rate, filter cutoff frequency, etc.) (3 ) with Matlab or SystemView realize the digital communication system (4) observing the waveform simulation and analysis (5) system performance evaluation.)

Volterra 级数，用于非线性建模，其中核需要自己确定，还有记忆长度(Volterra series for nonlinear modeling, in which the core needs to set itself, as well as memory length)

Capon提出MVDR（Minimum Variance Distortionless Response）高分辩方位估计方法以来，MVDR以其简单的算法、良好的性能得到了广泛关注，是一种具有良好实用前景的数字波束形成方法。(Capon proposed MVDR (Minimum Variance Distortionless Response) high resolution DOA estimation methods since, MVDR algorithm with its easy, good performance has been widespread public concern, is a good practical prospect of digital beamforming methods.)

支持向量机的分类识别程序，经过改进的程序，识别效果好(Support vector machine classification and recognition program, improved procedures, identify good)

Face Recognition Based on Local Features

the file is for light

substitution cipher is the method of encoding in which unit of plain text are replaced by cipher text. Monoalphabetic cipher uses a fixed message over entire message.A monoalphabetic cipher uses fixed substitution over the entire message.The monoalphabetic substitution takes a letter of an alphabet and substitutes it with another letter, this way a ciphertext is generated. The way of converting is fixed. A character of the plaintext will be replaced by the same ciphertext character, during the entire ciphertext. There is no additional key. The only way of security is to keep the substitution-table secret. A popular example for the monoalphabetic substitution is the caesar cipher.

该代码为PCA主成分分析，可用于特征选择，选取贡献最大的前三个主成分(The code for the PCA principal component analysis, can be used for feature selection, select the largest contribution to the first three principal components)

说明：  各种常见的窗函数，以及这些窗函数的时域波形和频域波形。(A variety of common window function, and their time-domain window function waveform and frequency domain waveforms.)