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用短时傅立叶变换对信号进行时频分析，并有频谱图随着窗的大小进行的对比。(Using short-time Fourier transform of the signal time-frequency analysis and frequency spectrum as the window size of the contrast.)

说明：  在前面1维，2维的基础上继续推出3维的FDTD程序，可以帮助解决复杂的3维电磁散射问题，适用范围更广。这个程序给出计算要求的参数即可运行。(in front of one-dimensional, two-dimensional basis continue to offer three-dimensional FDTD procedures, which can help to solve the complex three-dimensional electromagnetic scattering problems, which have wider applicability. This procedure gives the parameters computing requirements can run.)

AR模型，用修正协方差法求谱估计，简单实用。(AR model, with amendments covariance spectral estimation method, simple and practical.)

i am in need 4g related matlab code.i learning in area of lte-advanced downlink for writing the matlab code

matlab模糊工具箱的使用教程 4步教你学会使用matlab模糊控制工具箱(matlab fuzzy toolbox in step 4 using the tutorial to teach you how to use fuzzy control toolbox matlab)

用matlab实现混沌理论中的相空间重构代码，很好用的工具！(Chaos theory in phase space reconstruction using matlab code, very easy to use tool!)

NT4 component WinDbg source for developer reference

simulink d的SVPWM模块,作仿真的同志门用的着,(simulink d the SVPWM module for simulation of the door used by the comrades,)

北京航空航天大学出版的matlab从零进阶的原程序代码第1章案例21.3源代码(Beijing University of Aeronautics and Astronautics from zero Advanced matlab published the original program code in Chapter 1 Case 21.3 source code)

说明：  针对移动机器人在海水环境中的三维路径规划问题容易陷入局部最优和收敛慢等瑕疵,根据三维环境全局信息来改进蚁群算法以提高实时性和收敛速度(the ant colony algorithm is improved according to the global information of 3D environment to improve the real-time performance and convergence speed)