ofdmsymbol_fft_cp

2DFDTD TM波模拟仿真，采用CPML边界条件(2DFDTD TM wave simulation, the boundary conditions used CPML)

Construct the short length of QC LDPC codes without girth 4 and girth 6(The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn. This program presents an approach [1] for constructing the short length of LDPC codes with girth 8. First, we design 3 submatrices with different shifting functions given by our schemes, then combine them into a matrix according to our approach, finally, expand the matrix into a desired parity-check matrix using identity matrices and cyclic shift matrices of the identity matrices. The simulation results in AWGN channels show that the codes which can be obtained by the generator matrix derived from this check matrix for encoding the random information bits are as good as random LDPC codes [1]. Ref: [1] J. Fan, Y. Xiao, “A design of LDPC codes with large girth based on the sub-matrix shifting”, IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006), (CP525), p. )

可以将matlab中的mat文件转换成txt文件，方便其他的应用程序调用。(Mat files can be converted into a txt file and facilitate the application calls.)

非对称的树形结构滤波器设计 并MATLAB仿真出图 显示一次二次等分解合成的误差值分析(The asymmetric tree structure filter design and MATLAB simulation diagram shows a two second decomposition synthesis error value analysis )

BOC(1,1)的编码，BOC(1,1)的功率谱密度，可以完美运行，对做BOC编码的人很有用途(BOC (1,1) code, BOC (1,1) power spectral density, can run perfectly on the very people who make use of BOC coding)

This is implemented by Matlab and includes all mathematical functions of Quaternion.

LBP（局部二值模式）的matlab程序，有主文件lbp.m，对低版本的还有调用getmapping.m的文件，还有就是测试文件，是自己写的用循环语句批量处理图片用的(LBP (Local Binary Pattern) matlab program, there is the master file lbp.m, there are calls for a low getmapping.m version of the file, there is a test file, write your own pictures with batch processing loop used)

说明：  本文提出了一种基于混沌加密的DCT域二值图像数字水印算法.该算法首先利用混沌序列将含有版权信息的有意义二值图像水印进行加密,然后利用人眼视觉系统(HVS)的特性将原始载体图像进行块分类,最后将不同强度的水印分量嵌入到不同类的图像块DCT中频系数中去.利用混沌序列对水印进行加密,使水印本身具有安全性,对数字作品进行双重保障.通过高斯噪声,椒盐噪声以及JPEG压缩和剪切等攻击试验,表明了该算法具有较好的鲁棒性.(Encryption in DCT domain is proposed. Firstly, the meaningful binary image watermark containing copyright information is encrypted by using chaotic sequence, and then the original image is classified by using the characteristics of human visual system (HVS), Finally, the watermark components with different intensities are embedded into the DCT intermediate frequency coefficients of different types of image blocks. Chaotic sequences are used to encrypt the watermark, so that the watermark itself has security and double protection for digital works. Experiments on Gaussian noise, salt and pepper noise, JPEG compression and clipping show that the algorithm has good robustness)

MATLAB是一种以数值计算和数据图示为主的计算机软件，并包含适应多个学科的专业软件包，以及完善程序开发功能。 本课程设计旨在要求学生熟悉Matlab的功能，掌握Matlab程序设计和GUI设计的方法，培养学生的应用开发能力，为以后的毕业设计奠定一定的基础。(MATLAB is a numerical calculation and data icon-based computer software, and includes a number of disciplines to adapt to the package, as well as improve the development function. This course is designed to require students to know the function of Matlab, master Matlab programming and GUI design methods, and foster the application of student development capacity, for future graduation project to lay a foundation.)

说明：  遗传算法的matlab程序库 别人的辛勤劳动，请顶一下(GA Matlab procedures for the hard work of others, what the top)