Min-Sum Algorithm Using Multi-Edge-Type Normalized Scheme for ATSC 3.0 LDPC Decoders

To offer commercial LDPC decoders with better performance, in this paper, multi-edge-type (MET) normalized scheme is proposed to improve the performance of traditional min-sum algorithm (MSA) and its modified versions. With respect to sum-product algorithm (SPA), we firstly analyze and find out that...

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Vydáno v:IEEE transactions on broadcasting Ročník 66; číslo 3; s. 729 - 736
Hlavní autoři: Gao, Na, Xu, Yin, He, Dazhi, Park, Sung-Ik, Hong, Hanjiang, Ju, Hao, Chen, Changwen, Zhang, Wenjun
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.09.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Approximation algorithms
ATSC 3.0 LDPC codes
Codes
Computer simulation
Convergence
Decoders
Decoding
decoding algorithms
density evolution
Evolutionary algorithms
Iterative decoding
Manganese
MET-normalized scheme
Performance enhancement
Phase change materials
Random noise
Scaling factors
Television systems
ISSN:0018-9316, 1557-9611
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Shrnutí:To offer commercial LDPC decoders with better performance, in this paper, multi-edge-type (MET) normalized scheme is proposed to improve the performance of traditional min-sum algorithm (MSA) and its modified versions. With respect to sum-product algorithm (SPA), we firstly analyze and find out that the degradations of convergence in different edge types are distinct in MSA theoretically. To compensate the different degradations above, proposed MET-normalized scheme is used in normalized min-sum algorithm (MET-NMSA). In addition, MET-based density evolution (MET-DE) is also presented to search optimized MET-scaling factors for MET-NMSA. To further verify the validity of MET-normalized scheme, Advanced Television Systems Committee (ATSC) 3.0 LDPC codes are used to evaluate MET-NMSA in comparison with the conventional algorithms, i.e., normalized min-sum algorithm (NMSA), offset min-sum algorithm (OMSA) and variable-scaling normalized min-sum algorithm (VS-NMSA). Extensive simulation results show that MET-NMSA for ATSC 3.0 LDPC decoders has at most 1.53dB, 0.21dB and 0.35dB gain over NMSA, OMSA and VS-NMSA respectively when frame error rate (FER) is at 10 -4 level over additive white Gaussian noise (AWGN) channels using QPSK modulation.
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ISSN:0018-9316
1557-9611
DOI:10.1109/TBC.2020.2977557