Sammanfattning
In this paper, we introduce two new methods of mit- igating decoder error propagation for low-latency sliding window decoding (SWD) of spatially coupled low-density parity-check (SC- LDPC) codes. Building on the recently introduced idea of check node (CN) doping of regular SC-LDPC codes, here we employ variable node (VN) doping to fix (set to a known value) a subset of variable nodes in the coupling chain. Both of these doping methods have the effect of allowing SWD to recover from error propagation, at a cost of a slight rate loss. Experimental results show that, similar to CN doping, VN doping improves performance by up to two orders of magnitude compared to un-doped SC-LDPC codes in the typical signal-to-noise ratio operating range. Further, compared to CN doping, VN doping has the advantage of not requiring any changes to the decoding process. In addition, a log- likelihood-ratio based window extension algorithm is proposed to reduce the effect of error propagation. Using this approach, we show that decoding latency can be reduced by up to a significant fraction without suffering any loss in performance.
Originalspråk | engelska |
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Titel på värdpublikation | International Symposium on Information Theory and Its Applications, ISITA 2020 |
Förlag | IEEE - Institute of Electrical and Electronics Engineers Inc. |
Sidor | 175-179 |
ISBN (elektroniskt) | 978-4-88552-330-4 |
ISBN (tryckt) | 978-1-7281-2855-9 |
Status | Published - 2021 |
Evenemang | International Symposium on Information Theory and Its Applications (ISITA 2020) - Kapolei, Hawaii, USA Varaktighet: 2020 okt. 24 → 2020 okt. 27 |
Konferens
Konferens | International Symposium on Information Theory and Its Applications (ISITA 2020) |
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Förkortad titel | ISITA |
Land/Territorium | USA |
Ort | Kapolei, Hawaii |
Period | 2020/10/24 → 2020/10/27 |
Ämnesklassifikation (UKÄ)
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