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Decoder Error Propa...
Decoder Error Propagation Mitigation for Spatially Coupled LDPC Codes
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- Zhu, Min (författare)
- Xidian University
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- Mitchell, David G. M. (författare)
- New Mexico State University
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- Lentmaier, Michael (författare)
- Lund University,Lunds universitet,Trådlös kommunikation (master),Utbildningsprogram, LTH,Lunds Tekniska Högskola,Kommunikationsteknologi,Forskargrupper vid Lunds universitet,Wireless communication (M.Sc.),Educational programmes, LTH,Faculty of Engineering, LTH,Communications Engineering,Lund University Research Groups
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- Costello, Jr., Daniel J. (författare)
- University of Notre Dame
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(creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: International Symposium on Information Theory and Its Applications, ISITA 2020. - 9781728128559 - 9784885523304 ; , s. 175-179
- Relaterad länk:
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Abstract
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- 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
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- kon (ämneskategori)
- ref (ämneskategori)
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