International Journal of Information and Communication Technology Research
مجله بین المللی ارتباطات و فناوری اطلاعات
International Journal of Information and Communication Technology Research
Engineering & Technology
http://ijict.itrc.ac.ir
1
admin
2251-6107
2783-4425
doi
1652
25391
en
jalali
1395
3
1
gregorian
2016
6
1
8
2
online
1
fulltext
fa
QC-LDPC Codes Construction by Concatenating of Circulant Matrices as Block-Columns
فناوری اطلاعات
Information Technology
پژوهشي
Research
In this paper a new low complexity method for constructing binary quasi-cyclic low-density parity-check (QC-LDPC) codes is introduced. In the proposed method, each block-column of the parity check matrix H is made by a circulant matrix in a way that the associated Tanner graph is free of cycle four. Each circulant matrix in H is made by a generator column. The generator columns should be selected in a way that each associated circulant matrix and every two distinct circulant matrices are free of cycle four. The generator columns are made by row distance sets. An algorithm for generating distance sets and obtaining circulant matrices with columns of weight three is presented separately. Simplicity of construction and having a good flexible family of quasi cyclic LDPC codes both in rate and length are the main properties of the proposed method. The performance of the proposed codes is compared with that of the random-like and Array LDPC codes over an AWGN channel. Simulation results show that from the performance perspective, the constructed codes are competitive with random-like and Array LDPC codes.
QC-LDPC codes, girth, circulant matrices, AWGN channel, concatenation
45
50
http://ijict.itrc.ac.ir/browse.php?a_code=A-10-27-42&slc_lang=fa&sid=1
Mohammad Hesam
Tadayon
1003194753284600150
1003194753284600150
Yes
Mohammad
Mohammadi
1003194753284600151
1003194753284600151
No