QPSK

说明：  Matlab函数逼近程序，包含下面所列多种算法的程序 。 Chebyshev 用切比雪夫多项式逼近已知函数 Legendre 用勒让德多项式逼近已知函数 Pade 用帕德形式的有理分式逼近已知函数 lmz 用列梅兹算法确定函数的最佳一致逼近多项式 ZJPF 求已知函数的最佳平方逼近多项式 FZZ 用傅立叶级数逼近已知的连续周期函数(Matlab function approximation process, including following the procedures set out in a variety of algorithms. Chebyshev Chebyshev polynomial with a known function approximation using Legendre Legendre polynomial approximation of known function with Pade Pade form of rational fraction approximation of known function listed lmz Metz algorithm used to determine the best uniform approximation function ZJPF order polynomial function of the best known square approximation by Fourier series FZZ polynomial approximation of continuous periodic function of known)

原始周期图法求功率谱估计的matlab程序(The original periodogram seek power spectrum estimation matlab program )

高等光学仿真(MATLAB 版〉 一一光波导，激光(optical numerical simulation)

精度很高的多椭圆中心提取代码。算法参考论文：A Simple Operator for Very Precise Estimation of Ellipses.

Analog Lowpass Filter Design: Butterworth

matlab绘图初级入门讲义，十分有用。可以看看(matlab drawing primary entry notes, very useful. Can look at the)

线性调频雷达三维（方位面和俯仰面）和差波束图像(Radar dimensional (azimuth and elevation) sum and difference beams image)

5点法计算数值微分，5dianfa jisuan shuzhi weifen(calculate the numerical differentiation using 5 points method.)

数学形态学，灰度膨胀和灰度腐蚀运算，适用于一维信号处理(Morphology, gray-gray corrosion expansion and operation for one-dimensional signal processing)

模糊自整定PID控制器设计，基于MATLAB仿真实例，附上代码。(Fuzzy pid control example, based on MATLAB,it changs its Kp,Ki,Kd automatically.)