2006-06-23_rl-1_2-mfiles

基于LQ的二级倒立摆设计，可实现LQ校正，能画出原系统的阶跃响应，及加入LQ校正后的系统阶跃响应曲线。(LQ-based design of double inverted pendulum, can be realized LQ correction, can draw the step response of the original system, and adding LQ corrected step response curve.)

说明：  设计一个有干扰的直接序列扩频通信系统， PN码由m序列产生器产生，经过高斯白噪声信道。在接收端接收到的信号包括“有用信号+高斯白噪声+干扰”，将接收信号进行解扩，判决，得到用户的信号检测结果，绘制不同的扩频增益（增益值为10，30，50）下，误比特率随信噪比Eb/N0的变化曲线。(Design of a direct sequence spread spectrum interference system, PN code generated by the m sequence generator, after white Gaussian noise channel. Receives the signal at the receiver, including &quot useful signal+ Gaussian white noise+ interference&quot , will receive the signal despreading, judgments, get the user' s signal test results, draw a different spreading gain (gain value of 10,30, 50), the BER curves with the signal to noise ratio Eb/N0.)

to check for smaller eigen value

简单的光伏离并网问题，simulink仿真，采用pid控制。(Simple photovoltaic off grid problems, Simulink simulation, using PID control.)

列主元的Gauss消去法，此代码为防止矩阵的条件值太大，用于快速求解列主元。(The Gauss elimination method of the column principal element)

Roulette Wheel Selection

这是个matlab M文件，利用其可拟合不同波长下的折射率(This is a matlab M documents, which can be fitted using a refractive index different wavelengths)

使用Jakes方法产生单径Rayleigh衰落信道 输入多普勒频移， 样值之间的时间间隔以及 输出瑞利样值序列的长度，最后计算 输出Ns长的瑞利样值序列，加入多普勒频移

数字信号处理中的基本DTFT变换代码，有非常详尽的解说和推导过程(Digital Signal Processing DTFT fundamental transformation code, a very detailed explanation and derivation)

Matlab code for Image Stitching Program using homography between different images.