mydemo1

用MATLAB语言仿真实现CDMA系统中开环下发射分集的系统性能仿真(Using MATLAB simulation system performance simulation CDMA system under open-loop transmit diversity)

说明：  基于FFT的rife算法的改进型，实现对频率的估计(Based on FFT improved RIFE algorithm, frequency estimation is realized)

说明：  This is an E-book for signal processing using MATLAB.

MATLAB cross-validation tool for classification and regression v0.1 FEATURES: + K-fold cross validation. + Arbitrary train and prediction functions with parameters can be used. + Arbitrary loss function can be used. + Wrappers for KNN, SVM, GLM, robust regression and decision trees. + Wrappers for RMSE, MAD and misclassification loss functions.

原始数据存储为excell文件，先将数据进行预处理，再通过SVM进行模型的建立与预测。(The data are stored as a excell file, preprocessing the original data and builting the SVM model.)

CC_ABSCISSA returns the I-th Clenshaw Curtis abscissa.

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.)

It s an example to calculate Loadflows with Matlab

编写程序，分别读入两个语音文件,然后计算它们的短时自相关函数(Programming, respectively, read the two audio files, and then calculating their short-time auto-correlation function)

锁相环相关知识，包含二阶 三阶 锁相环的介绍以及编程实例汇总(Phase-locked-related knowledge, presentation and programming examples included 2nd and 3rd order PLL summary)