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The Effect of Coupling Memory and Block Length on Spatially Coupled Serially Concatenated Codes

Mahdavi, Mojtaba LU orcid ; Umar Farooq, Muhammad LU ; Liu, Liang LU orcid ; Edfors, Ove LU orcid ; Öwall, Viktor LU and Lentmaier, Michael LU (2020) IEEE 93rd Vehicular Technology Conference 2021 p.1-7
Abstract
Spatially coupled serially concatenated codes (SC-SCCs) are a class of spatially coupled turbo-like codes, which have a close-to-capacity performance and low error floor. In this paper, we perform a comprehensive design space exploration, revealing different aspects of SC-SCCs and discussing various design trade-offs. In particular, we investigate the impact of coupling memory, block length, decoding window size, and number of iterations on the performance, complexity, and latency of SC-SCCs. As a result, we propose design guidelines to make the code design independent of the block length. By introducing a modified window decoding schedule, we are able to demonstrate that the block length and coupling memory can be exchanged flexibly... (More)
Spatially coupled serially concatenated codes (SC-SCCs) are a class of spatially coupled turbo-like codes, which have a close-to-capacity performance and low error floor. In this paper, we perform a comprehensive design space exploration, revealing different aspects of SC-SCCs and discussing various design trade-offs. In particular, we investigate the impact of coupling memory, block length, decoding window size, and number of iterations on the performance, complexity, and latency of SC-SCCs. As a result, we propose design guidelines to make the code design independent of the block length. By introducing a modified window decoding schedule, we are able to demonstrate that the block length and coupling memory can be exchanged flexibly without changing the latency and complexity of decoding and without performance loss. Thus, thanks to spatial coupling, a certain code strength and performance can be achieved by either a very small block length or a large one, while the complexity and latency are fixed. Moreover, our results show that using higher coupling memory with smaller blocks can even improve the performance without increasing the latency and complexity. For all considered cases we observe that the performance of SC-SCCs is improved with respect to the uncoupled ensembles for a fixed latency and complexity. (Less)
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author
; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Channel coding, turbo-like codes, Spatially coupled codes, coupling memory, window decoding, serially concatenated convolutional codes (SCCCs), convolutional encoder, decoding thresholds, decoding latency, decoding performance
host publication
IEEE 93rd Vehicular Technology Conference (VTC)
pages
7 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE 93rd Vehicular Technology Conference 2021
conference location
Helsinki, Finland
conference dates
2021-04-25 - 2021-04-28
external identifiers
  • scopus:85112440812
ISBN
978-1-7281-8965-9
978-1-7281-8964-2
DOI
10.1109/VTC2021-Spring51267.2021.9448689
language
English
LU publication?
yes
id
740dc4c9-d2ec-44cb-9b74-e2d1c3640ffc
date added to LUP
2021-08-02 11:22:18
date last changed
2024-07-14 17:55:28
@inproceedings{740dc4c9-d2ec-44cb-9b74-e2d1c3640ffc,
  abstract     = {{Spatially coupled serially concatenated codes (SC-SCCs) are a class of spatially coupled turbo-like codes, which have a close-to-capacity performance and low error floor. In this paper, we perform a comprehensive design space exploration, revealing different aspects of SC-SCCs and discussing various design trade-offs. In particular, we investigate the impact of coupling memory, block length, decoding window size, and number of iterations on the performance, complexity, and latency of SC-SCCs. As a result, we propose design guidelines to make the code design independent of the block length. By introducing a modified window decoding schedule, we are able to demonstrate that the block length and coupling memory can be exchanged flexibly without changing the latency and complexity of decoding and without performance loss. Thus, thanks to spatial coupling, a certain code strength and performance can be achieved by either a very small block length or a large one, while the complexity and latency are fixed. Moreover, our results show that using higher coupling memory with smaller blocks can even improve the performance without increasing the latency and complexity. For all considered cases we observe that the performance of SC-SCCs is improved with respect to the uncoupled ensembles for a fixed latency and complexity.}},
  author       = {{Mahdavi, Mojtaba and Umar Farooq, Muhammad and Liu, Liang and Edfors, Ove and Öwall, Viktor and Lentmaier, Michael}},
  booktitle    = {{IEEE 93rd Vehicular Technology Conference (VTC)}},
  isbn         = {{978-1-7281-8965-9}},
  keywords     = {{Channel coding; turbo-like codes; Spatially coupled codes; coupling memory; window decoding; serially concatenated convolutional codes (SCCCs); convolutional encoder; decoding thresholds; decoding latency; decoding performance}},
  language     = {{eng}},
  month        = {{11}},
  pages        = {{1--7}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{The Effect of Coupling Memory and Block Length on Spatially Coupled Serially Concatenated Codes}},
  url          = {{http://dx.doi.org/10.1109/VTC2021-Spring51267.2021.9448689}},
  doi          = {{10.1109/VTC2021-Spring51267.2021.9448689}},
  year         = {{2020}},
}