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Title: Construction of Irregular QC-LDPC Codes via Masking with ACE Optimization
Authors: Han, Guojun
Guan, Yong Liang
Kong, Lingjun
Keywords: Approximate cycle EMD (ACE)
Issue Date: 2014
Source: Han, G., Guan, Y. L., & Kong, L. (2014). Construction of Irregular QC-LDPC Codes via Masking with ACE Optimization. IEEE Communications Letters, 18(2), 348-351.
Series/Report no.: IEEE Communications Letters
Abstract: Quasi-cyclic low-density parity-check (QC-LDPC) codes constructed by using algebraic approaches, such as finite geometry and finite field, generally have good structural properties and very low error-floors, and facilitate hardware implementation. Irregular QC-LDPC codes constructed from such QC-LDPC codes by using the masking technique, when decoded with the sum-product algorithm (SPA), have low decoding complexity, but often show early error-floors. In this paper, the relationship of cycle, girth and approximate cycle EMD (ACE) between the masking matrix and masked matrix is investigated, and the ACE algorithm is modified and used to construct the masking matrix for irregular QC-LDPC codes. Simulations demonstrate that the codes constructed by masking with ACE optimization exhibit much improved waterfall performance and lower error floors.
ISSN: 1089-7798
DOI: 10.1109/LCOMM.2014.010214.132463
Rights: © 2014 IEEE.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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