houfangjiaohui

use a three order loop to track the GPS L2C signal, could be useful for beginner

基于MATLAB的小波分析，通用小波函数(MATLAB-based wavelet analysis, general wavelet function)

A NEW MATLAB APPLICATION OF FEILD ORIENTED CONTROL (FOC) PROCEDURE OF DOUBLE STATOR INDUCTION MACHINE.

提供了详细的说明，有常见的各种变分法模型，其中包含了知识讲解，例题样例，同时提供了一部分代码实现(Detailed instructions are provided. Variational models are common, including knowledge explanations, sample examples, and some code implementations.)

信号与系统matlab作业2，Discrete Fourier Transform，Filtering of Noisy Signals(Discrete Fourier Transform，Filtering of Noisy Signals)

MUSIC算法[1]是一种基于矩阵特征空间分解的方法。从几何角度讲，信号处理的观测空间可以分解为信号子空间和噪声子空间，显然这两个空间是正交的。信号子空间由阵列接收到的数据协方差矩阵中与信号对应的特征向量组成，噪声子空间则由协方差矩阵中所有最小特征值（噪声方差）对应的特征向量组成。(MUSIC algorithm [1] is a feature space based on matrix decomposition method. From the geometric point of view, the signal processing can be decomposed observation space the signal subspace and the noise subspace, it is clear that the two spaces are orthogonal. Signal Subspace data received by the array covariance matrix and eigenvectors corresponding to the signal component, the noise subspace from the covariance matrix of all the smallest eigenvalue (noise variance) eigenvector components.)

说明：  应用于语音信号和油气管道泄漏信号的去噪处理，有良好的去噪效果(It is applied to the denoising of voice signal and oil and gas pipeline leakage signal, and has good denoising effect)

fft calculation of any input signal

這是一個讓原始音訊可以再不改變音訊長度下，改變pitch的程式，因為如果音訊用resample，雖然可改變其音訊頻率音高，但是卻會有拉長音訊的副作用，因此設計了一個可以改善其缺點的小方法(實做paper ）(This is an original audio so that you can no longer change the audio down the length of the program to change the pitch because if the audio with resample, although it can change the pitch of the audio frequency, but the audio will be stretched side effects, and thus can improve the design of a small way shortcomings (real do paper))

惯性导航仿真matlab程序，含轨迹生成等(Inertial navigation simulation matlab procedures, including trajectory generation, etc.)