LDPC

直方图是用面积表示各组频数的多少，矩形的高度表示每一组的频数或频率，宽度则表示各组的组距，因此其高度与宽度均有意义。 程序提取了很多直方图所需要的参数特征，如均值、方差、偏度、峰度、能量和熵。 (Histogram is that each group size the number of frequency, the height of the rectangular frequency of each group said that the number or frequency, the width of that group from each group, so the significance of height and width of both. Extraction procedures need a lot of parameters histogram features, such as mean, variance, skewness, kurtosis, energy and entropy.)

分类器的训练与学习是模式识别的一个重要环节,其目的在于按照某种算法,确定判决规则,使之具有自动分类识别的能力。本文介绍了采用Parzen窗法的随机模式分类器,并matlab实现了一个简易的随机模式分类器。(Classifier training and learning is an important part of pattern recognition, in accordance with the purpose of some kind of algorithm to determine the decision rules to identify with the ability of automatic classification. This paper introduces the Parzen window method using a random pattern classifier, and achieved a simple matlab random pattern classifier.)

通过Matlab编写M文件实现了对矩形脉冲周期信号的时域波形和频谱分析。(Time domain waveform and spectrum analysis of rectangular pulse periodic signals are realized by writing M files in Matlab.)

说明：  to find short time energy and zero cross rate

code for signal strenght of radio receiver

same file contents as the priviously three already uploaded files

AF协作分集信道与M-QAM自适应调制技术的系统频谱效率分析(AF cooperative diversity channels with M-QAM adaptive modulation spectral efficiency of the system)

说明：  可以实现有理数倍采样率转换，并有输入输出结果分析，比较(multirate)

MATLAB-stat，this is a programme for matlab

利用mathematicaplot 三维动态混沌分形图(Chaotic fractal graph and bifurcation diagram)