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Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation
CITATION: Du Toit, J. 2024. Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation. Unpublished doctoral dissertation. Stellenbosch: Stellenbosch Univeristy [online]. Available: https://scholar.sun.ac.za/items/6518e04b-66be-4830-967f-205c852...
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2024
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| _version_ | 1867613904104849408 |
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| access_status_str | Open Access |
| author | Du Toit, Jaco |
| author2 | Du Preez, Johan
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| author_browse | Du Preez, Johan
Du Toit, Jaco |
| author_facet | Du Preez, Johan
Du Toit, Jaco |
| author_sort | Du Toit, Jaco |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | CITATION: Du Toit, J. 2024. Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation. Unpublished doctoral dissertation. Stellenbosch: Stellenbosch Univeristy [online]. Available: https://scholar.sun.ac.za/items/6518e04b-66be-4830-967f-205c852787f4 |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/130820 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:33.016Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/130820 Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation Du Toit, Jaco Du Preez, Johan Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Cluster graph representations ;low-density parity-check codes; non-stationary channel noise estimation Error-correcting codes (Information theory) Wireless communication systems Graphical modeling (Statistics) Signal theory (Telecommunication) CITATION: Du Toit, J. 2024. Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation. Unpublished doctoral dissertation. Stellenbosch: Stellenbosch Univeristy [online]. Available: https://scholar.sun.ac.za/items/6518e04b-66be-4830-967f-205c852787f4 ENGLISH ABSTRACT:This dissertation proposes novel inference techniques for low-density paritycheck (LDPC) codes that exhibit enhanced accuracy and computational efficiency while also being capable of tracking non-stationary signal-to-noise ratios (SNRs) in a wireless communication system. We explore alternative inference techniques from the probabilistic graphical model (PGM) literature and evaluate a different graphical representation of LDPC codes called cluster graphs. Our results reveal that cluster graph LDPC codes outperform the more commonly used factor graph LDPC codes in terms of accuracy, computation, and convergence speed, offering an achievable alternative to fully tree-structured graphical representations of LDPC codes. Expanding on the inference algorithm, we introduce a channel noise estimator and sequential Bayesian learning update method for tracking non-stationary SNRs over time. The proposed algorithm is evaluated on real-world 5G drive-test data that demonstrates the tracking capability of the algorithm and performance advantages achieved. AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar. Doctoral 2024-02-28T07:33:50Z 2024-05-08T11:49:18Z 2024-02-28T07:33:50Z 2024-05-08T11:49:18Z 2024-03 Thesis https://scholar.sun.ac.za/handle/10019.1/130820 en_ZA Stellenbosch University xiv, 98 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Cluster graph representations ;low-density parity-check codes; non-stationary channel noise estimation Error-correcting codes (Information theory) Wireless communication systems Graphical modeling (Statistics) Signal theory (Telecommunication) Du Toit, Jaco Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title | Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title_full | Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title_fullStr | Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title_full_unstemmed | Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title_short | Cluster graph representations of low-density parity-check codes including non-stationary channel noise estimation |
| title_sort | cluster graph representations of low density parity check codes including non stationary channel noise estimation |
| topic | Cluster graph representations ;low-density parity-check codes; non-stationary channel noise estimation Error-correcting codes (Information theory) Wireless communication systems Graphical modeling (Statistics) Signal theory (Telecommunication) |
| url | https://scholar.sun.ac.za/handle/10019.1/130820 |
| work_keys_str_mv | AT dutoitjaco clustergraphrepresentationsoflowdensityparitycheckcodesincludingnonstationarychannelnoiseestimation |