SAR

TL431提供恒定偏流的电桥 TL431提供恒定偏流的电桥 (TL431 provide a constant bias current of the bridge to provide a constant bias current of the TL431 bridge)

This is set of codes for wireless telcommuniaction for who study wirless

This paper presents a novel algorithm of hiding secret messages by applying mathematical lemmas and information theory. The proposed algorithm can hide more information with acceptable embedded rate and achieves requirements of information hiding algorithm and simply information extracting. The main idea is applying modern algebra to solve the information hiding problem in multimedia. In order to prevent some attacks on stganography, hidden initial bits of image data pixels are chosen randomly. The extracted information are achieved without the reference of the original image and extracted keys. The experiment results show that our approach is effective and reliable.

海杂波模拟 lognormal分布 很好用的(Simulation of lognormal distribution of sea clutte)

利用边界追踪法对图像进行轮廓提取，此函数文件得到的是边界点对应位置索引矩阵(Boundary tracking method using the image contour extraction, this function is to get the file location of the boundary points corresponding to the index matrix)

基于FFT的自相关函数快速计算方法估计出自相关函数(Fast calculation method based on the FFT of the autocorrelation function is estimated from the correlation function)

用matlab实现灰色序列预测GM(1,1)，其中级比的判断采用手工判断。(Using matlab to achieve gray sequence prediction GM (1,1), one class than the judge to determine manually.)

Model Fitting using a Gui code in matlab. using AR,ARMA,MA models

matlab依据椭球的高斯投影公式，将某一个点的经纬度坐标转化为横纵坐标的计算公式的m文件。输入形式为n*2的矩阵即可。(matlab based on the Gaussian ellipsoid projection formula, the latitude and longitude coordinates of a point into a vertical and horizontal coordinates of the formula m-file.)

a mathematical framework for the asymptotic analysis of this system in generic noise and interference and also we investigate the performance of cooperative relaying over fading channel for an LTE downlink session