此为LDPC低密度校验码的编译码的原理与应用的详细介绍。包括各种信道模型下的仿真结果，有助于更好的学习通信系统的编译码过程的实现。-This is the LDPC coding and decoding LDPC codes principles and applications in detail. Including channel model simulation results, contribute to a better communication system of learning to achieve encoding and decoding process.