Dig_Filter

通过此代码实现萤火虫算法仿真，改变函数，即可实现不同的函数结果。(This code implements the firefly algorithm simulation, change the function, you can achieve different function results.)

使用有限差分法和分裂步傅里叶解法求解抛物方程，并增加散射体和地形的建模仿真。(Using the finite difference method and the split-step Fourier solution for solving the parabolic equation, and increase the scatterer and terrain modeling and simulation.)

用窗函数法设计一个线性相位FIR数字低通滤波器(With a window function method to design a linear phase FIR digital low-pass filter)

说明：  基于Matlab 编写的 LSTM源程序，仅供学习参考。(Matlab code of LSTM for learning and communication.)

copula函数在海洋中的应用，并且举出了理论和实例，有一定参考作用(The application of Copula)

MATLAB 牛顿下山法的一个小程序，原理就不详细说了。因牛顿迭代法受初值选取的限制，为防止迭代发散，对迭代过程再附加一项要求:|f(x(k+1))|<|f(x(k))|,将牛顿法迭代的结果:x(k+1) =x(k)-f(x(k))/f (x(k))和前一近似值x(k)适当加权平均做为新的改进值:x(k+1)=u*x(k+1) +(1-u)*x(k),其中u(0<> 迭代时u取1开始，逐次减半计算，直至附加要求符合为止。实例计算中x(k)=x(0)不变，只更新u和x(k+1)，直至:|f(x(k+1))|<|f(x(k))|（即|f(x(1))|<|f(x(0))|)，然后更新下山因子为u=1,继续以牛顿法迭代。(MATLAB Newton-down a small program, the principle is not explained in detail. Newton iteration by the initial value of the selected limit, in order to prevent additional iterative divergence, the iterative process a request: | f (x (k+1)) | < | f (x (k)) | Newton iteration Results: x (k+1) ' = X (k)-f (x (k))/f' (x (k)) and a previous approximation x (k), appropriately weighted average as a new improved value: x (k+1 ) = u* x (k+1) ' + (1-u)* x (k), where u (0 < u> iteration take successive calculated at 50 until the additional requirements found so far. examples of calculation of X ( k) = x (0) unchanged profile u and x (k+1, hungry) until: | f (x (k+1)) | < | f (x (k)) | (i.e. | f (x (1)) | < | f (x (0)) |), then profile downhill factor for u = 1, to continue to Newton iteration.)

智能天线上行链路的MUSIC算法仿真程序,窄带信号,高斯白噪声环境(smart antenna uplink MUSIC algorithm simulation program, narrowband signals, white Gaussian noise environment)

a code for photo changer

paper for research science

10 labs for digital signal processing for beginners using matlab