UEP Constructions of Quasi-Cyclic Low-Density Parity-Check Codes via Masking

Chi Jen Wu; Chung-Hsuan Wang; Chi Chao Chao

doi:10.1109/TIT.2017.2740940

UEP Constructions of Quasi-Cyclic Low-Density Parity-Check Codes via Masking

Chi Jen Wu, Chung-Hsuan Wang, Chi Chao Chao

Institute of Communications Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

In this paper, the algebraic constructions of quasi-cyclic low-density parity-check (QC-LDPC) codes with the unequal error protection (UEP) property are considered. A criterion for constructing such codes via the masking technique is proposed, based on which explicit conditions on the base parity-check matrices and masking matrices to achieve UEP are provided. We also give three specific constructions of UEP QC-LDPC codes. Furthermore, a sufficient condition to ensure strict UEP is presented. Simulation results demonstrate the superiority of our constructed codes over time-sharing schemes. The constructed codes also have competitive error performance against randomly constructed equal-error-protection LDPC codes and irregular UEP LDPC codes designed based on the degree distribution.

Original language	English
Article number	8012484
Pages (from-to)	6271-6294
Number of pages	24
Journal	IEEE Transactions on Information Theory
Volume	63
Issue number	10
DOIs	https://doi.org/10.1109/TIT.2017.2740940
State	Published - Oct 2017

Keywords

Low-density parity-check (LDPC) codes
masking
quasicyclic (QC) codes
unequal error protection (UEP)

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10.1109/TIT.2017.2740940

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abstract = "In this paper, the algebraic constructions of quasi-cyclic low-density parity-check (QC-LDPC) codes with the unequal error protection (UEP) property are considered. A criterion for constructing such codes via the masking technique is proposed, based on which explicit conditions on the base parity-check matrices and masking matrices to achieve UEP are provided. We also give three specific constructions of UEP QC-LDPC codes. Furthermore, a sufficient condition to ensure strict UEP is presented. Simulation results demonstrate the superiority of our constructed codes over time-sharing schemes. The constructed codes also have competitive error performance against randomly constructed equal-error-protection LDPC codes and irregular UEP LDPC codes designed based on the degree distribution.",

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AB - In this paper, the algebraic constructions of quasi-cyclic low-density parity-check (QC-LDPC) codes with the unequal error protection (UEP) property are considered. A criterion for constructing such codes via the masking technique is proposed, based on which explicit conditions on the base parity-check matrices and masking matrices to achieve UEP are provided. We also give three specific constructions of UEP QC-LDPC codes. Furthermore, a sufficient condition to ensure strict UEP is presented. Simulation results demonstrate the superiority of our constructed codes over time-sharing schemes. The constructed codes also have competitive error performance against randomly constructed equal-error-protection LDPC codes and irregular UEP LDPC codes designed based on the degree distribution.

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UEP Constructions of Quasi-Cyclic Low-Density Parity-Check Codes via Masking

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