Autofocus-for-digital-Fresnel-holograms-by-use

说明：  FQPSK与简单重复码的迭代译码,简单重复码做为外码(serial concatenation of repetition code and FQPSK ，in which repetition code is the out code)

心电数据的滤波代码，已经调试通过，可以滤出工频干扰，基线飘移。谢谢合作(ECG data filtering code debugging has been passed, and labor-frequency interference filters, baseline drift. Thank you for your cooperation)

TRANSFORMEE DE FOURIER

说明：  基于boost电路的双闭环PI控制单相有源功率因数校正仿真模型(Single-phase Active Power Factor Correction Simulation Model of Double Closed-loop PI Control Based on Boost Circuit)

包络检波matlab下实现的包络检波算法。先对信号进行(Matlab envelope detector envelope to achieve detection algorithm. First the signal)

DC-DC部分采用定功率单环控制，计算晶粒的生长，入门级别程序,基于负熵最大的独立分量分析。( DC-DC power single-part set-loop control, Calculation of growth, entry-level program grains Based on negative entropy largest independent component analysis.)

一段关于ULA_MUSIC的仿真程序，程序中对结果进行绘图(ULA_MUSIC algorithm simulation program)

本段程序主要写了认知无线电非视距误差下的仿真结果(The program is mainly written in paragraph cognitive radio simulation results under NLOS error)

Wavelet denoising For using this code need to use signal toolbox and general toolbox in your matlab In the first part of this assignment, we asked to obtain a (black-and-white) digital image of size 512 by 512 and then generate noisy image by adding a Gaussian noise but under the condition of having SNR=20dB by select the suitable value of variance for Gaussian noise formula. Second step is performing wavelet denoising using the hard thresholding (Use the db 6 for four levels) in the condition of finding the optimal thresholding value of T in terms of the SNR obtained. It means that, we should find the highest SNR value by finding the suitable value for threshold. Then we asked to do the same process but this time using soft thresholding. Finally for the last part of question one, we should compare the results of the obtained SNR with the recommendations of 3*sigma for the hard thresholding and 3/2*sigma for the soft thresholding.

说明：  图像分类程序 由四个函数组成 刚编号的(matlab)