homework4

计算分形维数，里面提供了分线法、盒维法和三角棱柱法。(Calculate the fractal dimension, which provides a sub-line method, box dimension method and the triangular prism method.)

基于频带方差的语音端点检测，很有用的，大家自己好好看，不是太难(variance based on the frequency of speech endpoint detection, very useful, we all do well, not too difficult)

天然气冷热电联供系统运行优化 matlab simulink 模型 可供参考(Matlab Simulink model for operation optimization of natural gas cogeneration system)

说明：  计算互信息，函数内提供注释，各位可以仔细阅读，欢迎各位下载。(calculate mutual information)

说明：  此代码为计算离散随机变量的熵、联合熵、条件熵、互信息的 Matlab 程序(This code is a matlab program for calculating entropy, joint entropy, conditional entropy and mutual information of discrete random variables)

程序尚不完善，固定提取了3个主成分，没有做寻求最佳主成分个数；没有做交叉有效性检验 (good)

OFDM channel estimation

说明：  用matlab写的维纳滤波，最陡下降法的实现例程。(Matlab written by Wiener filtering, the steepest descent method to achieve routine.)

How to create a modulated 64-QAM signal

说明：  压缩包内含有《MATLAB 6.0时尚创作百例》的源程序，很实用的。(Compressed packets contain MATLAB 6.0 fashion 100 cases of creation, the source, it is practical.)