shuzhifenxi

partial differential equation 2 by matlab

自适应回波对消程序，.mat文件是一个roomsim产生的数据，内有详细注释(Adaptive echo cancellation procedures, mat files a roomsim data, with detailed notes)

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)

说明：  基于密度峰值的快速聚类算法在matlab中的实现(Realization of fast clustering algorithm based on density peak in MATLAB)

4RRR并联平台的资料，用matlab程序编写的，比较全面(4RRR parallel platform of information with the matlab programming, and more comprehensive)

说明：  计算给定矩阵的互信息，这时的相关性是利用互信息来判断，矩阵的形式为邻接矩阵(compute the mutual information of the given matrix such as the matrix the elements in it are 0 or 1.)

在希尔伯特-黄变换中用来对信号过滤，一个过滤器函数 (The filter function)

this program is cryptosystem use RSA

matcam 4.5 安装及下载指导 链接matlab和visual，实现matlab的高级编程(matcam 4.5 matlab和visual)

该文件为matlab环境下的批处理程序，可以处理同一个文件夹下面的相同类型的文件(The file is a batch program matlab environment that can handle the same folder following the same type of file)