一本讲LDPC的经典书籍，英文的，可以-A classic LDPC about books, in English, you can see

两本信道编码很有用的书籍，一本介绍信道编码，一本介绍LDPC编码，好不容易弄的，很珍贵，跟大家分享下(Two useful books study about channel coding ,one introduces channel coding, the other introduce LDPC encoding, it is difficult to get, very valuable, to share with you)