Iterative Channel Estimation and Decoding via Spatial Coupling

Shuhei HORIO; Keigo TAKEUCHI; Tsutomu KAWABATA

doi:10.1587/transfun.E98.A.549

Iterative Channel Estimation and Decoding via Spatial Coupling

Shuhei HORIO, Keigo TAKEUCHI, Tsutomu KAWABATA

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For low-density parity-check codes, spatial coupling was proved to boost the performance of iterative decoding up to the optimal performance. As an application of spatial coupling, in this paper, bit-interleaved coded modulation (BICM) with spatially coupled (SC) interleaving — called SC-BICM — is considered to improve the performance of iterative channel estimation and decoding for block-fading channels. In the iterative receiver, feedback from the soft-in soft-out decoder is utilized to refine the initial channel estimates in linear minimum mean-squared error (LMMSE) channel estimation. Density evolution in the infinite-code-length limit implies that the SC-BICM allows the receiver to attain accurate channel estimates even when the pilot overhead for training is negligibly small. Furthermore, numerical simulations show that the SC-BICM can provide a steeper reduction in bit error rate than conventional BICM, as well as a significant improvement in the so-called waterfall performance for high rate systems.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E98-A No.2 pp.549-557

Publication Date: 2015/02/01

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Online ISSN: 1745-1337

DOI: 10.1587/transfun.E98.A.549

Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems)

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Authors

Shuhei HORIO
  The University of Electro-Communications
Keigo TAKEUCHI
  The University of Electro-Communications
Tsutomu KAWABATA
  The University of Electro-Communications

Keyword

spatial coupling, bit-interleaved coded modulation (BICM), channel estimation, iterative decoding, density evolution

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Shuhei HORIO, Keigo TAKEUCHI, Tsutomu KAWABATA, "Iterative Channel Estimation and Decoding via Spatial Coupling" in IEICE TRANSACTIONS on Fundamentals, vol. E98-A, no. 2, pp. 549-557, February 2015, doi: 10.1587/transfun.E98.A.549.
Abstract: For low-density parity-check codes, spatial coupling was proved to boost the performance of iterative decoding up to the optimal performance. As an application of spatial coupling, in this paper, bit-interleaved coded modulation (BICM) with spatially coupled (SC) interleaving — called SC-BICM — is considered to improve the performance of iterative channel estimation and decoding for block-fading channels. In the iterative receiver, feedback from the soft-in soft-out decoder is utilized to refine the initial channel estimates in linear minimum mean-squared error (LMMSE) channel estimation. Density evolution in the infinite-code-length limit implies that the SC-BICM allows the receiver to attain accurate channel estimates even when the pilot overhead for training is negligibly small. Furthermore, numerical simulations show that the SC-BICM can provide a steeper reduction in bit error rate than conventional BICM, as well as a significant improvement in the so-called waterfall performance for high rate systems.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1587/transfun.E98.A.549/_p

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@ARTICLE{e98-a_2_549,
author={Shuhei HORIO, Keigo TAKEUCHI, Tsutomu KAWABATA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Iterative Channel Estimation and Decoding via Spatial Coupling},
year={2015},
volume={E98-A},
number={2},
pages={549-557},
abstract={For low-density parity-check codes, spatial coupling was proved to boost the performance of iterative decoding up to the optimal performance. As an application of spatial coupling, in this paper, bit-interleaved coded modulation (BICM) with spatially coupled (SC) interleaving — called SC-BICM — is considered to improve the performance of iterative channel estimation and decoding for block-fading channels. In the iterative receiver, feedback from the soft-in soft-out decoder is utilized to refine the initial channel estimates in linear minimum mean-squared error (LMMSE) channel estimation. Density evolution in the infinite-code-length limit implies that the SC-BICM allows the receiver to attain accurate channel estimates even when the pilot overhead for training is negligibly small. Furthermore, numerical simulations show that the SC-BICM can provide a steeper reduction in bit error rate than conventional BICM, as well as a significant improvement in the so-called waterfall performance for high rate systems.},
keywords={},
doi={10.1587/transfun.E98.A.549},
ISSN={1745-1337},
month={February},}

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TY - JOUR
TI - Iterative Channel Estimation and Decoding via Spatial Coupling
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 549
EP - 557
AU - Shuhei HORIO
AU - Keigo TAKEUCHI
AU - Tsutomu KAWABATA
PY - 2015
DO - 10.1587/transfun.E98.A.549
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E98-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 2015
AB - For low-density parity-check codes, spatial coupling was proved to boost the performance of iterative decoding up to the optimal performance. As an application of spatial coupling, in this paper, bit-interleaved coded modulation (BICM) with spatially coupled (SC) interleaving — called SC-BICM — is considered to improve the performance of iterative channel estimation and decoding for block-fading channels. In the iterative receiver, feedback from the soft-in soft-out decoder is utilized to refine the initial channel estimates in linear minimum mean-squared error (LMMSE) channel estimation. Density evolution in the infinite-code-length limit implies that the SC-BICM allows the receiver to attain accurate channel estimates even when the pilot overhead for training is negligibly small. Furthermore, numerical simulations show that the SC-BICM can provide a steeper reduction in bit error rate than conventional BICM, as well as a significant improvement in the so-called waterfall performance for high rate systems.
ER -