The program can simulate fast Tanner LDPC codec with quasi-circular generator matrices, and 1/2 code rate.
Copyright (C2010-2015) Yang XIAO, Beijing Jiaotong University, Nov.3, 2010, E-Mail: email@example.com.
Current Version Published: 2010-11-5
In my following books, I derived the algorithm of constructing quasi-circular generator matrices from Tanner codes.
 Yang Xiao, Turbo and LDPC Codecs and their Applications, Press of Posts and Telecommunications, Beijing, 2010.
 Yang Xiao, MIMO Multiple Antenna Wireless Communication Systems, Press of Posts and Telecommunications, Beijing, 2009.
You can obtain different size of Tanner codes by adjusting parameter b, which should be a prime number [1,2].
Existing Tanner codes can not derive quasi-circular generator matrices, we revise the Tanner codes' parity check matrices [1,2]