An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality

Combining multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) with semiorthogonal user selection (SUS) yields both space diversity and multi-user diversity benefits; however, it entails a significant computational effort. To overcome this limitation while reta...

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Autores principales:	Hirofumi Suganuma, Yukiko Shimbo, Tomoki Maruko, Hiromichi Tomeba, Takashi Onodera, Fumiaki Maehara
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) user scheduling semiorthogonal user selection (SUS) ordering Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/4f3064e7c44048cfac988420bddc29a3
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spelling	oai:doaj.org-article:4f3064e7c44048cfac988420bddc29a32021-11-18T00:05:25ZAn Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality2169-353610.1109/ACCESS.2021.3124212https://doaj.org/article/4f3064e7c44048cfac988420bddc29a32021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9594821/https://doaj.org/toc/2169-3536Combining multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) with semiorthogonal user selection (SUS) yields both space diversity and multi-user diversity benefits; however, it entails a significant computational effort. To overcome this limitation while retaining system-level performance, this paper proposes an efficient method for combining MU-MIMO THP with SUS. The proposed method is inspired by the fact that the ordering calculations in both THP and SUS are generally based on spatial orthogonality. Particularly, the ordering result of SUS is fully reused for the ordering in THP, thereby eliminating the ordering calculation in the latter. Through a system-level performance evaluation, the proposed method is compared to a traditional method with the ordering process, thereby demonstrating the effectiveness of the proposed method. Numerical results obtained via computer simulations show that although the proposed method achieves almost the same system capacity as the traditional MU-MIMO THP method with ordering, the computational complexity of the proposed method decreases substantially with an increase in the number of antennas.Hirofumi SuganumaYukiko ShimboTomoki MarukoHiromichi TomebaTakashi OnoderaFumiaki MaeharaIEEEarticleMulti-user multiple-input and multiple-output (MU-MIMO)Tomlinson-Harashima precoding (THP)user schedulingsemiorthogonal user selection (SUS)orderingElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 148449-148458 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) user scheduling semiorthogonal user selection (SUS) ordering Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) user scheduling semiorthogonal user selection (SUS) ordering Electrical engineering. Electronics. Nuclear engineering TK1-9971 Hirofumi Suganuma Yukiko Shimbo Tomoki Maruko Hiromichi Tomeba Takashi Onodera Fumiaki Maehara An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
description	Combining multi-user multiple-input and multiple-output (MU-MIMO) Tomlinson-Harashima precoding (THP) with semiorthogonal user selection (SUS) yields both space diversity and multi-user diversity benefits; however, it entails a significant computational effort. To overcome this limitation while retaining system-level performance, this paper proposes an efficient method for combining MU-MIMO THP with SUS. The proposed method is inspired by the fact that the ordering calculations in both THP and SUS are generally based on spatial orthogonality. Particularly, the ordering result of SUS is fully reused for the ordering in THP, thereby eliminating the ordering calculation in the latter. Through a system-level performance evaluation, the proposed method is compared to a traditional method with the ordering process, thereby demonstrating the effectiveness of the proposed method. Numerical results obtained via computer simulations show that although the proposed method achieves almost the same system capacity as the traditional MU-MIMO THP method with ordering, the computational complexity of the proposed method decreases substantially with an increase in the number of antennas.
format	article
author	Hirofumi Suganuma Yukiko Shimbo Tomoki Maruko Hiromichi Tomeba Takashi Onodera Fumiaki Maehara
author_facet	Hirofumi Suganuma Yukiko Shimbo Tomoki Maruko Hiromichi Tomeba Takashi Onodera Fumiaki Maehara
author_sort	Hirofumi Suganuma
title	An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
title_short	An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
title_full	An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
title_fullStr	An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
title_full_unstemmed	An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality
title_sort	efficient method for combining multi-user mimo tomlinson-harashima precoding with user selection based on spatial orthogonality
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/4f3064e7c44048cfac988420bddc29a3
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An Efficient Method for Combining Multi-User MIMO Tomlinson-Harashima Precoding With User Selection Based on Spatial Orthogonality

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