time-frequency-analysis

In this simulink model , 16-QAM modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.

两个求信号包络谱和幅值谱的matlab程序，也可求功率谱。(2 effective procedures for the signal envelope spectrum and amplitude spectrum)

这个是用阶跃风速、风轮、传动系统以及转速控制器的模型，来观测风力发电机的阶跃相应(This step is to use the wind speed, wind turbines, transmission system and the model of the speed controller to measure wind generators step accordingly)

用matalb实现了参数可变的极零抵消滤波器还陷波滤波器输入参数既可以应用(Matalb achieved with an extremely variable parameter is also zero-offset filter notch filter can be applied to both the input parameters)

说明：  经典的遗传算法工具箱的算术交叉程序，与大家分享(classic genetic algorithm toolbox arithmetic Cross procedures, and share)

这是一个关于潮流计算的Matlab小程序，可以帮助初学者熟悉电力系统方面相关程序编写(This is a small program on Matlab flow calculation, can help beginners familiar with aspects of the power system-related programming)

绘图并还有指定的legends and colorbars(his function will create a new figure containing the axes/uipanels specified, and also their associated legends and colorbars. )

基于传递矩阵的方法，计算转子动力学系统临界转速及振型(Critical Speed and Vibration Mode of Rotor Dynamics System Based on Transfer Matrix Method)

实现了无线通信中需要使用的信道模型，分析各种模型下的输入信号后的仿真和分析(On the basis of the study in multi-path propagation theory, characteristics and mathematics models of wireless channels, and the analysis of references from both domestic and international realm, this thesis will generalize the detailed classification of wireless mobile communication channels, and the typical small-scale fading modules (Rayleigh fading and Rice fading), which the signals has encountered while transmitted in communication channels. )

将MATLM3应用于有限差分法的正演计算中．充分发挥了其强大而方便的功能。 通过对二维稳定电流场模型的试算表明，ATLAB在解决实际的工程和数学问题中，与其它计算机程序设计语言 FORTRAN相比，具有使用更为简便、语句功能更强(Will MATLM3 finite difference method applied to the forward calculation. Give full play to its powerful and convenient features. Through the two-dimensional current field model calculations show that, ATLAB in solving practical engineering and mathematical problems, and other computer programming language FORTRAN, compared with the use of more convenient, more powerful statement)