On unequal error protection LDPC codes based on plotkin-type constructions

Author

Kumar, Vidya ; Milenkovic, Olgica

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO

Volume

54

Issue

6

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

994

Lastpage

1005

Abstract

We introduce a new family of unequal error protection (UEP) codes, based on low-density parity-check (LDPC) component codes and Plotkin-type constructions. The codes are decoded iteratively in multiple stages, and the order of decoding determines the level of error protection. The level of UEP among the code bits is also influenced by the choice of the LDPC component codes and by some new reliability features incorporated into the decoding process. The proposed scheme offers a very good tradeoff between code performance on one side and encoding/decoding and storage complexity on the other side. The novel approach to UEP also allows for finding simple approximations for the achievable degrees of UEP, which can be used to govern practical code design implementations

Keywords

decoding; parity check codes; LDPC codes; Plotkin-type constructions; decoding process; low-density parity-check codes; unequal error protection codes; AWGN; Additive white noise; Code standards; Error correction codes; Gaussian noise; Image storage; Iterative algorithms; Iterative decoding; Parity check codes; Telecommunication computing; Low-density parity-check (LDPC) codes; Plotkin construction; unequal error protection (UEP);

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2006.876842

Filename

1643529