zhuazhen

Matlab for Experiments

说明：  输入波形信号，就可以输出时频分析的结果输入波形信号，就可以输出时频分析的结果(Input waveform signal, you can output the results of time-frequency analysis of the input waveform signal, you can output the results of time-frequency analysis)

该MATLAB程序实现了simplex迭代算法，该算法可以在不对目标函数求导情况下进行优化，适合数据量较大的算法优化。(The MATLAB program to achieve a simplex iterative algorithm, which can be optimized in the right objective function derivation, the large amount of data suitable algorithm optimization.)

本代码可以用于一个月的潮汐调和分析，求出调和常数，并进行潮汐预报。(Month of tidal harmonic analysis)

运用MATLAB制作高通、低通等各种滤波器，实现变声系统。(Making use of MATLAB to create high pass, low pass and other filters,to achieve the goal of changing the sound . )

BP神经网络 作为弱分类器，反复训练，多个BP神经网络组成强分类器(The BP neural network as a weak classifier, repeated training, many of the BP neural network classifier)

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)

实现支持向量回归，能够实现小样本的回归预测分析(Regression analysis to realise the prediction base on small sample)

这是东南大学信息科学与工程学院《数字信号处理 第二版》第四章的实验，关于IIR 滤波器的( This is the School of Information Science and Engineering, " Digital Signal Processing Second Edition" Southeast University experiment of Chapter IV, on IIR filters)

家庭能量管理负荷优化调度。计及光伏出力、储能对可平移负荷进行调度以实现节能效果。有注释。(Home energy management. Load optimization scheduling. PV power generation and energy storage are considered to schedule the translational load to achieve energy saving. The program has a lot of comments.)