PID

语音信号的短时能量程序，可以实现清浊音分离(Short-time speech signal energy program, you can achieve the sound separation Qingzhuo)

matlab中的彩色图转换成灰度图后的最新集中算法的运用的边缘检测(The color chart matlab edge detection)

这个文件中包含了一些信息利用小波的图像重建(this file contains some information about image reconstruction by using wavelet)

首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。(First, according to the characteristics of the short training word correlation operation, the signal reaching the detector, when the detected correlation value is greater than the threshold after a certain number of times that a signal arrives. And then the characteristics of long training word, the correlation operation for the FFT window starting position of an OFDM symbol estimate. The estimated position of the FFT window, the first small frequency offset in the time domain estimation, the two long training word small frequency offset compensation, the FFT operation, the FFT result of the operation for integer frequency offset estimate. These parameter estimation is completed, the data can be demodulated on. The first portion of the data for a complete frequency offset compensation, and based on the estimated FFT window position of the FFT operation to obtain frequency domain data, demodulated. Then corresponding to the position of the pilot subcarriers are extracted on pilot inform)

分别用三段直线和imadjust函数对图像进行对比度增强，并可以比较结果。(Three lines and imadjust function of image contrast enhancement, and can compare the results.)

基于QPSK调制方式配合MIMO通信原理进行的STC编发的matlab仿真(Based on QPSK modulation with MIMO communication principle of STC braided matlab simulation)

光学单缝衍射是光学中经常用到的实验，该实验能够很好地模拟光学实验，希望各位好好下载，不懂跟我联系(Single slit diffraction )

采用Davenport功率谱密度函数，线性滤波法模拟风荷载(Davenport using power spectral density function, linear filtering method to simulate wind loads)

读国外机载天气雷达APR2数据，包括速度图和反射率图，色标可以换，和网站上公布的几乎一样哦(Read APR2 foreign airborne weather radar data and displays)

基础的牛拉法计算潮流的程序，适合初学者参考，(Calculated based on the trend of the ox-drawn process)