QC_LDPC

Program to construct QC_LDPC codes without girth 4 and girth 6.

This is a Program to construct QC_LDPC codes without girth 4 and girth 6.
Ref: J. Fan, Y. Xiao, A design of LDPC codes with large girth based on the sub-matrix shifting,
IET International Conference on Wireless Mobile and Multimedia Networks Proceedings
(ICWMMN 2006).

Size of parity-check matrix H is (3p*v^2) x (p*v^3).
Number of 1 in rows = v, Number of 1 in column = 3

Example:
H = QC_LDPC(6,1);
size(H) = 108 * 216
number of ones in each row is equal to 6.
number of ones in each column is equal to 3.