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orthogonal frequency division multiplexing using wireless networks

使用MATLAB设计滤波器，然后下消除指定位置消除消元(Design the filter with MATLAB, then eliminate the specified position to eliminate the elimination.)

计算圆波导的TE/TM传播问题的matlab源程序(matlab code for the simulation of circul waveguide)

说明：  用matlab算法实现的平方根算法 用于数值分析中平方根发求解线性方程(Matlab algorithm using the square root algorithm for the numerical analysis of the square root of hair for solving linear equations)

线性调频信号的雷达回波信号仿真，仿真了10个脉冲发射信号的回波信号。(The radar echo signal simulation of the linear FM signal，Simulation of the echo signal of the 10 pulse transmit signal. )

求信号频谱的源程序，使用傅里叶变换使得减低噪声的源程序。(qiu xin hao pin pu de yuan cheng xu,li yong fu li ye bianhuan jiandi zaosheng)

梯度下降法是最早最简单，也是最为常用的最优化方法。梯度下降法实现简单，当目标函数是凸函数时，梯度下降法的解是全局解。一般情况下，其解不保证是全局最优解，梯度下降法的速度也未必是最快的。梯度下降法的优化思想是用当前位置负梯度方向作为搜索方向，因为该方向为当前位置的最快下降方向，所以也被称为是”最速下降法“。最速下降法越接近目标值，步长越小，前进越慢。(The gradient descent method is the earliest and most simple and most commonly used optimization method. The gradient descent method is simple to realize. When the objective function is a convex function, the solution of the gradient descent method is a global solution. In general, the solution is not guaranteed to be the global optimal solution, and the gradient descent method is not necessarily the fastest. The optimization idea of gradient descent method is to use the current position negative gradient direction as the search direction, because the direction is the fastest descending direction of the current position, so it is also called the steepest descent method. The faster the slowest descent approach is closer to the target, the smaller the step, the slower the progress.)

MIMO-OFDM channel estimation 。是基于mmse准则的，欢迎大家下载使用。(MIMO-OFDM channel estimation. Is based on the MMSE criteria, welcomed everyone download.)

分析声音波长频率，通过对声音的分析，以达到识别声音的效果(Analyze sound wavelength frequency, through the analysis of the sound to identify the effect of the sound)

说明：  用matlab采集音频，这只需要你的电脑有录音设备，适用于新的R2018a及以上版本(Use matlab to collect audio. It only needs your computer to have a recording device, which is suitable for the new r2018a and above)