Abstract:
This article presents a simple, less
computational complexity method for constructing
exponent matrix ( ) 3, K having girth at least 8 of quasicyclic low-density parity-check (QC-LDPC) codes based
on subtraction method. The construction of code deals
with the generation of exponent matrix by three formulas.
This method is flexible for any block-column length K .
The simulations are shown in comparison with some
existing appreciable work. The codes with girth 8 are
constructed with circulant permutation matrix (CPM) size
P max a ≥ {a a 2, 2, 2, rr k , , . 1.
