The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dans cet article, une détection BP en deux étapes est proposée pour le MIMO surchargé. La proposition combine BP avec l'algorithme de pré-annulation MMSE suivi d'une détection normale de BP. Dans les systèmes MIMO surchargés, les boucles d'un graphique de facteurs dégradent les performances de démodulation de la détection BP. La pré-annulation MMSE réduit le nombre de connexions ou de valeurs de coefficients dans le graphique factoriel, ce qui améliore les caractéristiques de convergence des probabilités a posteriori. Les résultats numériques obtenus par simulation informatique montrent que les BER de la détection BP en deux étapes proposée surpassent la BP conventionnelle avec pré-annulation MMSE dans une plage d'énergie binaire faible lorsque la taille du bloc MMSE est de quatre et le nombre de blocs MMSE est un. Lorsque la pré-annulation est appliquée pour réduire la complexité, le schéma proposé réduit les opérations de multiplication et les opérations de sommation du même facteur de 0.7, bien que l'ampleur de l'amélioration des performances par rapport au schéma conventionnel soit limitée.
Risa SHIOI
Keio University
Takashi IMAMURA
Keio University
Yukitoshi SANADA
Keio University
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Risa SHIOI, Takashi IMAMURA, Yukitoshi SANADA, "Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 3, pp. 309-317, March 2022, doi: 10.1587/transcom.2021EBP3046.
Abstract: In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021EBP3046/_p
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@ARTICLE{e105-b_3_309,
author={Risa SHIOI, Takashi IMAMURA, Yukitoshi SANADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO},
year={2022},
volume={E105-B},
number={3},
pages={309-317},
abstract={In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.},
keywords={},
doi={10.1587/transcom.2021EBP3046},
ISSN={1745-1345},
month={March},}
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TY - JOUR
TI - Two-Stage Belief Propagation Detection with MMSE Pre-Cancellation for Overloaded MIMO
T2 - IEICE TRANSACTIONS on Communications
SP - 309
EP - 317
AU - Risa SHIOI
AU - Takashi IMAMURA
AU - Yukitoshi SANADA
PY - 2022
DO - 10.1587/transcom.2021EBP3046
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2022
AB - In this paper, two-stage BP detection is proposed for overloaded MIMO. The proposal combines BP with the MMSE pre-cancellation algorithm followed by normal BP detection. In overloaded MIMO systems, the loops in a factor graph degrade the demodulation performance of BP detection. MMSE pre-cancellation reduces the number of connections or coefficient values in the factor graph which improves the convergence characteristics of posteriori probabilities. Numerical results obtained through computer simulation show that the BERs of the proposed two-stage BP detection outperforms the conventional BP with MMSE pre-cancellation in a low bit energy range when the MMSE block size is four and the number of MMSE blocks is one. When the pre-cancellation is applied for complexity reduction, the proposed scheme reduces multiplication operations and summation operations by the same factor of 0.7 though the amount of the performance improvement to the conventional scheme is limited.
ER -