ldpc-decode

This file contains Least Square method program which is one of en bloc approaches to identifying a system. The target is calculating parameter vector of a system

Flexible construction of girth-six QC-LDPC Codes(The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k and m can be varied.The program achieves girth-six by applying the row-column constraint. There are m rows in j submatrices. No two rows should share the same column more than once. This constraint is applied to avoid 4-cycles. The construction has flexibility in that j,k and m can be varied.)

简单的音调识别系统，能够识别出钢琴弹奏出的音符/(Simple speech recognition system based on Matlab can get the final result through sample training.)

说明：  一个关于LQG控制的简单例子，对相关函数的调用的理解相当有帮助，亲测有效实用。(A simple example of LQG control is very helpful to understand the call of related functions, and it is effective and practical to test personally.)

冈萨雷斯数字图像处理，北京大学的课程课件。(Gonzalez Digital Image Processing, Peking University courseware.)

Guide for time-frequency analysis in Matlab.

利用模板对图像进行增强，主要用于对道路的增强处理，所用模板是适应予道路增强的，当然可以自己根据自己需要进行修改(use templates to enhance the images, mainly for the increase of road, template is used to meet the increasing road course according to their own need for amendment)

说明：  几种传统的图像插值放大方法：最近邻插值法，双线性插值法，双三次插值法(Several traditional interpolation to enlarge the image : nearest neighbor interpolation, bilinear interpolation, bicubic interpolation.)

完备图像稀疏表示是一种最新的图像表示模型，采用过完备字典中原子的线性组合形式实现图像的稀疏表示．传统 的过完备图像稀疏表示模型采用重建误差的平方和作为保真项．该保真项没有充分考虑到人眼对图像的感知特性，无法度量图 像中边缘、轮廓、纹理等局部几何结构的变化．本文基于过完备稀疏表示理论思想，建立了新的稀疏性正则化的图像稀疏表示模 型．模型中的正则项约束图像表示系数的稀疏性，保真项采用更符合视觉感知的结构相似性度量．基于正交匹配追踪算法，提出 了基于结构相似度的正交匹配追踪算法．实验结果表示，新的模型能够更好地重构图像的结构信息，获得更好的重建视觉效果． (Image Sparse Representation Model bed StmctIlral SiIIIilarity )

this is matlab code that perform convex optimization for several objective function types