PLL_ceshi

MUSIC algorithm for spectrum estimation

说明：  AR滤波器的标准程序，非常好用，可以试验下(AR filter is standard procedure, very easy to use, you can test under)

嵌套阵列DOA估计matlab例程，基于Nested Arrays A Novel Approach to Array Processing With Enhanced Degrees of Freedom。(Matlab simulation for DOA estimation with nested array.)

说明：  求出最小逼近的算法，帮同学写的直接就可以运行 (Find the lowest approximation algorithm, to help students write directly on the run)

mathematical model of the rlc series circuit and s domain analysis of rlc circuit

A filter bank structure that can deal effectively with piecewise smooth images with smooth contours, was proposed by Minh N Do and Martin Vetterli. The resulting image expansion is a directional multiresolution analysis framework composed of contour segments, and thus is named contourlet. This will overcome the challenges of wavelet and curvelet transform. Contourlet transform is a double filter bank structure. It is implemented by the pyramidal directional filter bank (PDFB) which decomposes images into directional subbands at multiple scales. In terms of structure the contourlet transform is a cascade of a Laplacian Pyramid and a directional filter bank. In essence, it first use a wavelet-like transform for edge detection, and then a local directional transform for contour segment detection. The contourlet transform provides a sparse representation for two-dimensional piecewise smooth signals that resemble images.

topsis这种的向量归一化问题，实用性(topsis this vector normalized)

形成地球物理地震数据例子，含有3个双曲线有效波，一个水平干扰，一个拟线性的干扰(A geophysical seismic data example, to contain 3 hyperbolic significant wave, a level of interference, a pseudo-linear interference)

2x2 alamouti code for mimo channel

解线性方程组的一种非线性迭代法：共轭斜量法。适用于方程组系数矩阵实对称正定的情况(Solution of linear equations of a nonlinear iterative method: conjugate oblique method. Applicable to equations coefficient matrix is symmetric positive definite situation)