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Jerkovits, Thomas and Liva, Gianluigi and Graell i Amat, Alexandre (2018) Improving the Decoding Threshold of Tailbiting Spatially Coupled LDPC Codes by Energy Shaping. IEEE Communications Letters. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/lcomm.2018.2802488. ISSN 1089-7798.
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Abstract
Abstract—We show how the iterative decoding threshold of tailbiting spatially coupled (SC) low-density parity-check (LDPC) code ensembles can be improved over the binary input additive white Gaussian noise channel by allowing the use of different transmission energies for the codeword bits. We refer to the proposed approach as energy shaping. We focus on the special case where the transmission energy of a bit is selected among two values, and where a contiguous portion of the codeword is transmitted with the largest one. Given these constraints, an optimal energy boosting policy is derived by means of protograph extrinsic information transfer analysis. We show that the threshold of tailbiting SC-LDPC code ensembles can be made close to that of terminated code ensembles while avoiding the rate loss (due to termination). The analysis is complemented by Monte Carlo simulations, which confirm the viability of the approach.
| Item URL in elib: | https://elib.dlr.de/118786/ | ||||||||||||||||
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| Document Type: | Article | ||||||||||||||||
| Title: | Improving the Decoding Threshold of Tailbiting Spatially Coupled LDPC Codes by Energy Shaping | ||||||||||||||||
| Authors: |
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| Date: | 2018 | ||||||||||||||||
| Journal or Publication Title: | IEEE Communications Letters | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||
| DOI: | 10.1109/lcomm.2018.2802488 | ||||||||||||||||
| Publisher: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||||||
| ISSN: | 1089-7798 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Convolutional LDPC codes, decoding threshold, spatial coupling, tailbiting codes | ||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||
| HGF - Program: | Space | ||||||||||||||||
| HGF - Program Themes: | Communication and Navigation | ||||||||||||||||
| DLR - Research area: | Raumfahrt | ||||||||||||||||
| DLR - Program: | R KN - Kommunikation und Navigation | ||||||||||||||||
| DLR - Research theme (Project): | R - Vorhaben Multimedia Satellitennetze (old) | ||||||||||||||||
| Location: | Oberpfaffenhofen | ||||||||||||||||
| Institutes and Institutions: | Institute of Communication and Navigation > Satellite Networks | ||||||||||||||||
| Deposited By: | Jerkovits, Thomas | ||||||||||||||||
| Deposited On: | 08 Feb 2018 14:21 | ||||||||||||||||
| Last Modified: | 15 Jun 2023 07:32 |
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- Improving the Decoding Threshold of Tailbiting Spatially Coupled LDPC Codes by Energy Shaping. (deposited 08 Feb 2018 14:21) [Currently Displayed]
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