digital_filter_design

说明：  我编写的利用trous（多孔算法）实现小波变换，利用‘db4’小波函数分解两层，其中卷积运算采用频域的fft算法，给出了仿真信号的处理结果。(prepared by the use of trous (porous algorithm) to achieve wavelet transform, use 'db4' wavelet decomposition layers, which used convolution operators fft the frequency domain algorithm, given the signal processing simulation results.)

2维曲面拟合，gauss or gabor 函数(Functions to fit a 2D Gaussian or 2D Gabor to a surface. The routines are automatic in the sense that they do not require the specification of starting guesses for the model parameters. This is done by evaluating the quality of fit (sum of squared error) for many different choices of parameters then refining the most promising set of params through least-squares (exhaustive search followed by refinement). Least-squares is statistically equivalent to maximum likelihood estimation of the model parameters on the assumption of independent, normally distributed Gaussian noise in the observations (pixels). autoGaussianSurf(xi,yi,zi) fits a Gaussian,)

关于网络仿真生成trace后文件的分析代码(After about network simulation generates trace file analysis code)

小波包分析提取振动信号中的特征频率，ML法能够很好的估计信号的信噪比,利用自然梯度算法。( Wavelet packet analysis to extract vibration signal characteristic frequency, ML estimation method can be a good signal to noise ratio, Use of natural gradient algorithm.)

FIR、IIR数字滤波器的Matlab仿真程序(FIR, IIR digital filter of the Matlab simulation program)

说明：  在matlab中实现信号的模数以及数模转换，并包含简单的界面(achieve the Matlab Signal Module and hundreds of analog conversion, and includes a simple interface)

using servo characteristic equations,transfer function is derived by taking laplace

我们对离散时间信号进行傅里叶变换和频谱分析。(We do the discrete time signal FFT and spectrum analysis )

《空间谱估计理论与算法》中的信源数目估计，Matlab程序源代码(" Space Spectral Estimation Theory and Algorithms" in the estimated number of sources, Matlab source code)

求pp波和ps波反射系数。。。。。。。。。。。。。。。。(Seeking pp wave and ps wave reflection coefficient)