低密度奇偶校验码(LDPC码)被普遍认为是当今最先进的一种纠错码(信道编码)。LDPC码,图模型,迭代译码的研究热潮已在全球流行有10年以上。这篇论文高度概括的简述了LDPC码的背景和基本知识,从一些独特的视角并联系多个领域提出一些对LDPC码相关知识的理解方法和见解主张,总结了LDPC码当今最新的研究进展。从理论和应用两方面提出作者认为非常有意义的研究问题。 Low density parity check codes (LDPC codes) are generally considered as the most advanced kind of error correction codes (channel coding). The research craze of LDPC code, graph model and iterative decoding has been in the world for more than 10 years. This paper gives a brief overview of the background and basic knowledge of LDPC codes. From some unique perspectives and links with many fields, I come up with some understanding methods and opinions about LDPC codes, summarize the latest research progress of LDPC codes . From the theory and the application, it puts forward the research question that the author thinks is very significant.