question4

说明：  一个完整的OFDM仿真程序，采用QPSK调制，有信道估计，大家交流下！(A complete OFDM simulation program, using QPSK modulation, a channel estimation, to share next!)

surf算法对导入的图像在视频里做匹配，方框标记出来, 清晰易懂(use SURF detector to match object of interest )

时频分析 时频分析方法提供了时间域与频率域的联合分布信息，清楚地描述了信号频率随时间变化的关系。(Joint Time-Frequency Analysis)

想保留的成分为cos(2*π*n/3) 带通滤波器，滤除1+cos(2*π*n/3) 的成分，即想保留的成分为cos(π*n/4) 带阻滤波器，滤除cos(π*n/4) 的成分，(Want to keep the ingredients for the cos (2* π* n/3) band-pass filter, filter 1+ Cos (2* π* n/3) of the composition, that is, want to keep the ingredients of cos (π* n/4 ) band-stop filter, filter cos (π* n/4) of the composition,)

This is a code for 2X2 MIMO system using Alamouti code

matlab低通滤波器，可直接在matlab运行，显示()

说明：  非常好用的直方图均衡程序。把图片名字改成自己的图片名字即可。(Histogram equalization )

A comprehensive codes written to teach flight control systems by Simulink, it is simple and good to beginners and advanced students.

MatLab-20Tutorial.zip........this file contains 20 pdf tutorails on matlab with examples on m files.

matlab神经网路工具箱详细教程，通过matlab实现多种网络(Matlab neural network toolbox detailed tutorial)