sigproc

关于matlab的中文帮助，对于一些初学的且英语不好的同学有用(on Matlab Chinese help for the novice and some bad English students useful)

非常有用的程序，可以调用来处理循环平稳信号，用以产生三维自相关图形。(Very useful program, you can call to handle the cyclostationary signals to generate three-dimensional self-related graphics.)

ray tracing光线跟踪。 Matlab实现光线跟踪算法，建模光线折射、衰减、像差。(ray tracing, ray tracing. Matlab ray tracing algorithm, the modeling of light refraction, attenuation, aberrations.)

说明：  根据连续时间函数的采样数据，利用spline重构该连续函数，并检查重构误差。(spline interpolation )

说明：  基于平面波展开 传输矩阵计算2维矩形光子晶体模型 计算可得出相关图谱 handbook中除了参数说明还有参考文献等(Plane wave expansion based on the transfer matrix calculation of 2-D model calculation of rectangular photonic crystal patterns can be drawn from the relevant handbook of parameters except that there are references such as)

MATLAB实现的单相双闭环ＰＷＭ整流器　　参数设置比较正确　波形出来也不错　就是进入稳态时间比较长(MATLAB to achieve double-loop single-phase PWM rectifier waveform parameters set by the more accurate is also a good time to enter the steady-state long)

说明：  灰度门限化许多情况，图象是由具有不同灰度级的两类区域组成。如文字与纸张、地物与云层（航空照片）。其特点:直方图具有两个峰，分别与两个灰度级范围相对应 。故可选择一个门限，将两个峰分开。(Gray threshold of many cases, the image is gray level of two different regional groupings. If words and paper, surface features and cloud cover (aerial photograph). Its features: histogram has two peak, respectively, with the two gray-scale range corresponding to. So choose a threshold, separating the two peaks.)

求正弦信号fft，并利用该fft计算正弦信号的功率，信噪比等(Seeking sinusoidal signal fft, fft calculated using the sinusoidal signal power, SNR, etc.)

一个平面上的三个点，用一个工业相机确定相机在平面上所照的点的算法(used for find the position in the 3D dimention.)

基于三层结构的光纤Bragg光栅基本模（LP01）的截至频率测试程序，欢迎拍砖