ch4

说明：  利用matlab对空时编码的多天线系统中的alamouti空时编码进行了仿真，信道为瑞利衰落信道(Matlab using space-time coding on the multi-antenna system of space-time coding alamouti the simulation, channel for Rayleigh fading channels)

短时傅里叶变换可以用差分模式来实现，对书上的运算式做了稍许的改变。改变-计算差分序列的第一列数据时用的是第一列的元素减去当前行的最后一列元素。原算法中采用的是第一列元素减去下一行第二列元素。原算法加窗之后结果比较好，不加窗时结果误差很大，而改变之后的算法不加窗效果依然很好。(Short time Fourier transform can be used to achieve the differential mode of expression on the book made a slight change. Change- calculating the difference sequence of the data with the first column is the first column of the matrix by subtracting the current element in the last column of row. Is used in the original algorithm subtracts the elements of the first column of the next row and the second column elements. After the results of the original algorithm windowed better, when the results window without great error, and after changing algorithms no window effect is still very good.)

分析该方波的傅里叶级数展开表达式，确定采样频率，生成需要处理的方波信号(matlab dealing with signal)

Okumura analyzed path-loss characteristics based on a large amount of experimental data collected around Tokyo, Japan. He selected propagation path conditions and obtained the average path-loss curves under flat urban areas. Then he applied several correction factors for other propagation conditions, such as: Antenna height and carrier frequency Suburban, quasi-open space, open space, or hilly terrain areas Diffraction loss due to mountains Sea or lake areas Road slope Hata derived empirical formulas for the median path loss (L50) to fit Okumura curves.

四通道表面肌电信号活动段检测方法（通过能量值）(action detection ways of four-channel sEMG(by energy value))

两种interpolate图像的算法， 一种是OptimalRecovery, 另一种不知。(two algorithms to interpolate images, one is optimalRecovery, another one unknown.)

Harada book simulation chapter 3

matlab学习资料，对于初学者来说是一本不错的入门教程(matlab learning materials, for beginners is a good introductory tutorial)

关于matlab编程的基本规则和说明，作者是richard johnson(basic rules and description about how to program in matlab,the author is richard johnson)

光伏电池pv模型,能够输出光照强度和温度变化时的P-U曲线和I-U曲线(Pv photovoltaic cell model)