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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
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Multi-utilisateur – Des techniques à entrées multiples et sorties multiples (MU-MIMO) ont été proposées pour augmenter l'efficacité du spectre ; une hypothèse clé était que les terminaux mobiles (MT) étaient simples et ne comportaient que quelques antennes. Cet article se concentre sur l'algorithme de diagonalisation de blocs (BD) basé sur la stratégie d'allocation de puissance égale en tant que technique MU-MIMO pratique. Lorsqu'il y a de nombreux MT à l'intérieur de la zone de service du point d'accès (AP), l'AP doit déterminer, à chaque intervalle de temps, le sous-ensemble des MT à multiplexer spatialement. Étant donné que les performances de transmission dépendent des sous-ensembles de MT, la méthode de sélection de l'utilisateur doit utiliser les informations sur l'état du canal (CSI) obtenues dans la couche physique pour maximiser le débit de transmission réalisable (ATR). Dans cet article, nous clarifions la relation entre ATR avec SU-MIMO et celle avec MU-MIMO dans un canal à haute valeur propre. Sur la base de la relation dérivée, nous proposons une nouvelle mesure pour la sélection des utilisateurs. La nouvelle mesure, le facteur de décroissance des valeurs propres, représente la dégradation des valeurs propres dans l'espace nul par rapport à celles de SU-MIMO ; il est obtenu à partir des vecteurs spatiaux de signaux des MT. Un procédé de sélection d'utilisateur basé sur la mesure proposée identifie la combinaison de MT qui produit l'ATR le plus élevé ; notre approche réduit également la charge de calcul liée à la sélection des utilisateurs. Nous évaluons l'efficacité de la sélection des utilisateurs avec la nouvelle mesure à l'aide de formulations numériques et de simulations informatiques.
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Riichi KUDO, Yasushi TAKATORI, Kentaro NISHIMORI, Atsushi OHTA, Shuji KUBOTA, Masato MIZOGUCHI, "A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 10, pp. 3206-3218, October 2009, doi: 10.1587/transcom.E92.B.3206.
Abstract: Multiuser -- Multiple Input Multiple Output (MU-MIMO) techniques were proposed to increase spectrum efficiency; a key assumption was that the Mobile Terminals (MTs) were simple with only a few antennas. This paper focuses on the Block Diagonalization algorithm (BD) based on the equal power allocation strategy as a practical MU-MIMO technique. When there are many MTs inside the service area of the access point (AP), the AP must determine, at each time slot, the subset of the MTs to be spatially multiplexed. Since the transmission performance depends on the subsets of MTs, the user selection method needs to use the Channel State Information (CSI) obtained in the physical layer to maximize the Achievable Transmission Rate (ATR). In this paper, we clarify the relationship between ATR with SU-MIMO and that with MU-MIMO in a high eigenvalue channel. Based on the derived relationship, we propose a new measure for user selection. The new measure, the eigenvalue decay factor, represents the degradation of the eigenvalues in null space compared to those in SU-MIMO; it is obtained from the signal space vectors of the MTs. A user selection method based on the proposed measure identifies the combination of MTs that yields the highest ATR; our approach also reduces the computational load of user selection. We evaluate the effectiveness of user selection with the new measure using numerical formulations and computer simulations.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.3206/_p
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@ARTICLE{e92-b_10_3206,
author={Riichi KUDO, Yasushi TAKATORI, Kentaro NISHIMORI, Atsushi OHTA, Shuji KUBOTA, Masato MIZOGUCHI, },
journal={IEICE TRANSACTIONS on Communications},
title={A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems},
year={2009},
volume={E92-B},
number={10},
pages={3206-3218},
abstract={Multiuser -- Multiple Input Multiple Output (MU-MIMO) techniques were proposed to increase spectrum efficiency; a key assumption was that the Mobile Terminals (MTs) were simple with only a few antennas. This paper focuses on the Block Diagonalization algorithm (BD) based on the equal power allocation strategy as a practical MU-MIMO technique. When there are many MTs inside the service area of the access point (AP), the AP must determine, at each time slot, the subset of the MTs to be spatially multiplexed. Since the transmission performance depends on the subsets of MTs, the user selection method needs to use the Channel State Information (CSI) obtained in the physical layer to maximize the Achievable Transmission Rate (ATR). In this paper, we clarify the relationship between ATR with SU-MIMO and that with MU-MIMO in a high eigenvalue channel. Based on the derived relationship, we propose a new measure for user selection. The new measure, the eigenvalue decay factor, represents the degradation of the eigenvalues in null space compared to those in SU-MIMO; it is obtained from the signal space vectors of the MTs. A user selection method based on the proposed measure identifies the combination of MTs that yields the highest ATR; our approach also reduces the computational load of user selection. We evaluate the effectiveness of user selection with the new measure using numerical formulations and computer simulations.},
keywords={},
doi={10.1587/transcom.E92.B.3206},
ISSN={1745-1345},
month={October},}
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TY - JOUR
TI - A New User Selection Measure in Block Diagonalization Algorithm for Multiuser MIMO Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 3206
EP - 3218
AU - Riichi KUDO
AU - Yasushi TAKATORI
AU - Kentaro NISHIMORI
AU - Atsushi OHTA
AU - Shuji KUBOTA
AU - Masato MIZOGUCHI
PY - 2009
DO - 10.1587/transcom.E92.B.3206
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2009
AB - Multiuser -- Multiple Input Multiple Output (MU-MIMO) techniques were proposed to increase spectrum efficiency; a key assumption was that the Mobile Terminals (MTs) were simple with only a few antennas. This paper focuses on the Block Diagonalization algorithm (BD) based on the equal power allocation strategy as a practical MU-MIMO technique. When there are many MTs inside the service area of the access point (AP), the AP must determine, at each time slot, the subset of the MTs to be spatially multiplexed. Since the transmission performance depends on the subsets of MTs, the user selection method needs to use the Channel State Information (CSI) obtained in the physical layer to maximize the Achievable Transmission Rate (ATR). In this paper, we clarify the relationship between ATR with SU-MIMO and that with MU-MIMO in a high eigenvalue channel. Based on the derived relationship, we propose a new measure for user selection. The new measure, the eigenvalue decay factor, represents the degradation of the eigenvalues in null space compared to those in SU-MIMO; it is obtained from the signal space vectors of the MTs. A user selection method based on the proposed measure identifies the combination of MTs that yields the highest ATR; our approach also reduces the computational load of user selection. We evaluate the effectiveness of user selection with the new measure using numerical formulations and computer simulations.
ER -