此代码将要求用户指定想要生成的 H 矩阵的大小。

香农学生gallager的著作，通信人必读，信息论和可靠通信

【国外通信教程】Low-Density Parity-Check Codes (Gallager博士)

MIT数字通信原理教程，英文原版讲义，适应研究生研究学习参考之用。

LDPC码是目前人们发现的纠错性能最好的一种码。为了说明这一问题，下面对LDPC码和 turb。码进行了简要比较。简单的说，LDPC码比turbo码区别在于，LDPC码是一种线性分组 码，采用BP迭代译码；而turbo码采用的是卷积码，译码方法主要有MAP类的算法和软输出 Viterbi算法的迭代译码。LDPC码有理论极限性能优于turbo码, 给定1/2码率条件下，采用 BPSK调制的高斯信道中两种编码方法的纠错性能比较，LDPC码比turbo码更接近香农限，目 前最优的LDPC码方案具有的香农限仅有0.0045dB。

Gallager 数字通信原理答案，很经典的教材，答案是完全版。

Gallager所著的博士论文，学ldpc的入门资料

信息论经典外文教材，Robert G.Gallager编著，通俗易懂

国外经典的教课书，从国外网站下载的。是通信专业的课的经典教科书。

This definitive textbook provides a solid introduction to discrete and continuous stochastic processes, tackling a complex field in a way that instils a deep understanding of the relevant mathematical principles, and develops an intuitive grasp of the way these principles can be applied to modelling real-world systems. It includes a careful review of elementary probability and detailed coverage of Poisson, Gaussian and Markov processes with richly varied queuing applications. The theory and applications of inference, hypothesis testing, estimation, random walks, large deviations, martingales and investments are developed. Written by one of the world's leading information theorists, evolving over twenty years of graduate classroom teaching and enriched by over 300 exercises, this is an exceptional resource for anyone looking to develop their understanding of stochastic processes.