colorgraph

vad（语音活动检测）的matlab代码，采用频域的方法计算信噪比。(vad (voice activity detection) Matlab code, using frequency-domain approach to calculate the signal-to-noise ratio.)

说明：  通过导入后缀为.wav的噪声音频信号通过matlab进行频谱分析(Frequency spectrum analysis by importing noise audio signal suffixed with. wav through MATLAB)

This matlab code generates UWB indoor channel impulse response described in : Cassioli, D. Win, M.Z. Molisch, A.F., "The ultra-wide bandwidth indoor channel: from statistical model to simulations," Selected Areas in Communications, IEEE Journal on , vol.20, no.6, pp. 1247-1257, Aug 2002 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1021916&isnumber=21989 All parameters of the channel were taken from the reference paper

a code that inserts ur given watermark in an image using the dct domain

matlab的rbf神经网络文件，可用于股市预测，能够生成误差图，预测图(the rbf neural network matlab files, can be used for stock market prediction, to generate error maps, prediction chart)

1 设计一个ＦＩＲ数字低通滤波器， 满足一组模拟滤波器的指标参数；分别采用三角窗、hamming窗、blackman窗和kaiser窗进行设计。比较不同窗的设计效果。要求描绘滤波器的脉冲响应、窗函数以及滤波器的幅频和相频响应曲线。 2. 用上述设计滤波器完成几组给定信号的滤波。 3.设计数字高通、带通、带阻滤波器，要求描绘滤波器的脉冲响应以及滤波器的幅频和相频响应曲线。 (1、A design of a FIR digital low-pass filter, analog filters to meet the target of a group of parameters were used triangular window, hamming window, blackman windows and kaiser window design. Window to compare different design effect. Requirements described impulse response filter, window function and the filter amplitude-frequency and phase frequency response curve. 2. Using the above filter was designed to complete several sets of a given signal filtering. 3. Design of digital high-pass, band pass, band-reject filter, the filter impulse response described demand as well as the filter amplitude-frequency and phase frequency response curve.)

MATLAB进行模糊统计，得到模糊分布(隶属函数)近似解析表达式(MATLAB fuzzy statistics, get fuzzy distribution (membership function) approximate analytical expressions)

2010 数学建模大赛 赛前matlab培训5(2010 Mathematical Contest in Modeling Training (numerical entry) lecture 5.zip)

Writing GNU Emacs Extension

16QAM调制解调，不用系统自带命令，完全按照调制解调系统进行。(16QAM modulation and demodulation, without the system comes with command, in full accordance with modulation and demodulation system.)