NN-backpropagation

Motion estimation algorithm - New three step search

经典的拓扑优化SIMP方法，Sigmund写的(Classical SIMP topology optimization methods, Sigmund write)

矩形波傅里叶变换，n=1,3,5,9,19,39,79,159(Square wave Fourier transform)

激光谐振腔 自再现模型 条形腔 矩形腔 圆形腔(Since the laser resonator cavity rectangular cavity reconstruction model circular cavity strip)

说明：  基于MATLAB的源码程序，用来实现读取PPM格式的图像(MATLAB-based source program to read PPM format image)

FFT变换以及IFFT变换 基于matlab编程 (Based on the FFT and IFFT transform matlab programming)

程序实现了基于MATLAB的pi/4 QPSK的仿真,系统在相同条件下，对加噪声和没有噪声的情况，分别画出了它的眼图分析其性能，及已调制信号的时域波形和频谱。(The program realizes the simulation of pi/4 QPSK based on MATLAB. Under the same condition, the system draws its eye diagram to analyze the performance of the noise and no noise, and the time domain waveform and spectrum of the modulated signal .)

m=8时双极性八电平可调 信噪比 差错估计(m = 8 时 bipolar eight-level adjustable noise ratio error estimated)

matlab图像显示代码，可以选择想要打开的图像(Matlab image display code, we can choose to want to open the Image)

对模拟信号抽样，然后进行离散傅里叶变换，利用自编DFT函数，得到频谱，然后进行频谱的还原。(Sampling the analog signal, then the discrete Fourier transform, DFT self function obtained spectrum and the spectrum reduction.)