M-files

we can calculate pSNR ratio in matlab

接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。 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。 (The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program. First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af)

developing envelope matlab prog

music change speed中，jiasu.m是让一首音乐旋律速度加快播放，jiansu.m是让一首音乐旋律速度减慢播放，两个情况下都不改变音乐的基调。(Music change speed, jiasu.m is to allow a faster melodic playing, jiansu.m is to make a musical rhythm to slow down play, the two cases do not change the tone of music.)

基于LMS算法的系统辨识代码，matlab编程 (Lms algorithm based on the system to identify code)

说明：  利用matlab构建蚁群算法自动获取图像的轮廓(Construction of ant colony algorithm using matlab image contours automatically get)

仿真图是速度、距离、幅度三维图像，用于图像处理的独立分量分析，关于神经网络控制，对于初学者具有参考意义，相关分析过程的matlab方法，多目标跟踪的粒子滤波器，研究生时的现代信号处理的作业，包括最小二乘法、SVM、神经网络、1_k近邻法。( FIG simulation speed, distance, amplitude three-dimensional image, Independent component analysis for image processing, On neural network control, For beginners with a reference value, Correlation analysis process matlab method, Multi-target tracking particle filter, Modern signal processing jobs when the graduate, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.)

基于模糊PID控制下的BUCK电路稳压输出的仿真，并对比了模糊控制和PID控制。(Based on the simulation of BUCK circuit voltage stabilizing output under fuzzy PID control, the fuzzy control and PID control are compared.)

说明：  计算模糊C-均值聚类中的初始隶属度值，并进行调节(clculate the initial degree of membership)

阵列信号处理中的capon算法，课本上的算法(Capon array signal processing algorithms, the algorithm textbook)