qpsk_modulation

直接扩频系统常用函数，有助于对直接扩频系统的算法研究。(functions for Direct spread spectrum system,guod referense for the study for Direct spread spectrum system)

OFDM到AFDMA的映射（matlab）(OFDM to AFDMA mapping (matlab))

对于Matlab的金融工具箱的更为优化使用。类似与指导书尤其关于使用技巧指导。(Financial Optimization using MATLAB’s Financial Toolbox Sonal Varshney, Arnab Sarkar )

MATLAB经典程序，内容由简单到困难。我也有相关视频(MATLAB classical procedures, content, from simple to difficult. I also have related videos)

用Matlab实现Huffman编码，解决对文本的压缩解压(Huffman coding with Matlab realize and solve the text compression decompression)

使用matlab计算微小球形颗粒在介质中的散射系数(Calculation of small spherical particles in the medium mie coefficients)

说明：  一维光子晶体透过率曲线模拟，入射角为0.2rad，N=6(One-dimensional photonic crystal transmittance curve of simulation, the incident angle for the 0.2rad, N = 6)

说明：  MidPoint 中点公式求取导数 ThreePoint 三点法求函数的导数 FivePoint 五点法求函数的导数 DiffBSample 三次样条法求函数的导数 SmartDF 自适应法求函数的导数 CISimpson 辛普森数值微分法法求函数的导数 Richason 理查森外推算法求函数的导数 ThreePoint2 三点法求函数的二阶导数 FourPoint2 四点法求函数的二阶导数 FivePoint2 五点法求函数的二阶导数 Diff2BSample 三次样条法求函数的二阶导数 (Interpolation function)

这是一个MADLAB的例程,对于数学建模有很大帮助(This is a MADLAB routines are very helpful for mathematical modeling)

matlab中信噪比计算程序，可以检验使用matlab内置函数添加的噪声是否正确(Can be tested using matlab citic noise ratio calculation, matlab built-in functions to add noise is correct )