I-LEACH_VS_LEACH

利用函数MadHG生成规则LDPC码的校验矩阵H，其行重为6,列重为3,行数为列数一半(行数越大越好)，H中任意两列没有围长为4的圈，并得到H对应的生成矩阵G，可以保证mod(G*H ,2)=0。使用方法为:[H,G] = MadHG(m,n,x),x= 1(得到的G左半部分为单位阵) or 2(G右半部分为单位阵),(use function MadHG Generation rules LDPC check matrix H, re-6, series of three, out for a few half of the number (A bigger the better), H 2 arbitrary no girth of the four circles, H counterparts and with the formation of matrix G, we can be assured of mod (G* H, 2) = 0. To be used : [H, G] = MadHG (m, n, x), x = 1 (the G part of the Left Front units) or 2 (G right half of the units RUF),)

ITU标准下的大气传播衰减计算程序，使用简单方便，只需要输入传播角度，高度，气候环境，即可计算大气传输损耗（不包括自由空间传播损耗）(According to the ITU standard, this program calculates the atmospheric loss. It is simple to use, you only have to input some parameters such as height, elevation angle, etc)

一个小型的微电网模型，包括风力发电机和光伏电池，用来检测运行状态(A small micro grid model, including wind turbines and photovoltaic cells, used to detect running state )

ULTRSIM是一款超声图像仿真软件，可以作为超声图像仿真研究的工具，附有matlab代码(ULTRSIM is an ultrasound image simulation software can be used as a tool for simulation of ultrasonic images)

循环冗余校验CRC (Cyclic Redundancy Check)码是由分组线性码的分支而来，其主要应用是二元码字。编码简单且误判概率很低，在通信系统中得到了广泛的应用。循环冗余校验码是属于分组码中的一类重要的线性码，它不仅在理论上具有很好的代数结构，而且其编码和译码可以通过线性移位寄存器很容易地实现。 通过对CRC的分析和基于MATLAB工具的仿真，充分证明了CRC的检错能力很强，编码简单。 (Cyclic Redundancy Check CRC (Cyclic Redundancy Check) code is a linear code from the sub-branch from the main application is the binary code word. Coding is simple and very low probability of miscarriage of justice, in the communication system has been widely used. Cyclic redundancy check code is a block code in one important class of linear code, which not only has good in theory, algebraic structure, and its encoding and decoding of linear shift register can easily realize . CRC through analysis and simulation tool based on MATLAB, and fully proves that the CRC error detection ability of a strong, simple coding.)

dc motor pwm control in matlab

说明：  最短路径算法的matlab实现,每条语句的都有详细的注释，可以供入门使用。(To achieve the shortest path algorithm matlab)

实现基本的ofdm通信系统，包括ifft，加窗等等(Ofdm communication system to achieve the basic)

本代码适用于随机场中的KL正交展开，可用于描述参数的空间变异。(This code is suitable for KL orthogonal expansion in random fields and can be used to describe the spatial variation of parameters.)

matlab dpcm编码，可以在MATLAB下实现DPCM的编码~(matlab dpcm coding, DPCM can be achieved in MATLAB coding ~)