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说明：   2003年，ITU-R制订完成了下一代移动通信系统的纲领性文件M.1645，其中明确要求，下一代移动通信系统支持低速用户100Mb/s，高速用户1Gb/s的传输速率。由于频谱资源紧张，如何在占用有限的频带资源的条件下，实现大范围网络覆盖，支持更高速率的无线数据(bu cuo deyuan ma hen hao hao de xue xi azi x)

详细介绍了MATLAB 的基础知识、数值计算、符号运算、图形处理、程 序设计、SIMULINK 仿真等内容，为配合教学，各章编写了教学提示、教学要求和习题，书后附有上机实 验指导。(Introduces the basics of MATLAB, numerical computing, symbolic computation, graphics processing, program design, SIMULINK simulation, etc, to meet the teaching, the preparation of the various chapters of the teaching tips, classes and exercises, the book with the experimental guide.)

该段代码生成不同长度下，双绞线信道的远端衰减冲激响应系数。双绞线频域带宽最高可达106MHz，采样率设置时必须大于两倍的频域带宽。双绞线信道模型使用ITU-T-SG15 contribution 11GS3-029中的模型。(This code generates a different length, the distal twisted channel impulse response attenuation coefficient. Twisted frequency domain bandwidth of up to 106MHz, must be greater than twice the frequency-domain bandwidth sampling rate settings. UTP channel model using the ITU-T-SG15 contribution 11GS3-029 the model.)

说明：  一种matlab实现网络划分的算法，主要用于复杂网络中的社区发现(A matlab algorithm for network partition, which is mainly used for community discovery in complex networks)

图像处理中用到的一些代码，在MATLAB环境下开发的。(image processing.)

eye pattern, also known as an eye diagram, is an oscilloscope display in which a digital data signal from a receiver is repetitively sampled and applied to the vertical input, while the data rate is used to trigger the horizontal sweep. It is so called because, for several types of coding, the pattern looks like a series of eyes between a pair of rails. It is an experimental tool for the evaluation of the combined effects of channel noise and intersymbol interference on the performance of a baseband pulse-transmission system. It is the synchronised superposition of all possible realisations of the signal of interest viewed within a particular signalling interval.

This is a file for calculating the weighted PSNR in matlab

使用LSB方法在图像中嵌入一段文本，可能对大家有用！(use LSB methods embedded in the image section of the text, may be useful for all!)

Example of the FDTD method with graphical output.(Example of the FDTD method with graphical o utput.)

一篇2007年全国数学建模A题的优秀获奖论文。(A 2007 National Mathematical Modeling A theme of the excellent award-winning paper.)