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Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels
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This paper proposes a null-space expansion scheme for multiuser massive MIMO transmission in order to suppress inter-user interference (IUI) triggered by the temporal variation of the channel. The downlink multiuser MIMO channel capacity of time varying channels is severely degraded since IUI must be suppressed at the transmitter side by using past estimated channel state information at the transmitter side (CSIT). Massive MIMO has emerged as one of the most promising technologies for further capacity enhancement by increasing the number of base station (BS) antenna elements. Exploiting the excess degrees of freedom (DoFs) inherent in massive MIMO, a BS with the proposed IUI suppression scheme performs multiple null-steering for each UE (User Equipment) antenna element, which expands the null-space dimension. Computer simulations show that the proposed scheme has superior IUI suppression performance to the existing channel prediction scheme in time varying channels.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E100-B No.5 pp.865-873
- Publication Date
- 2017/05/01
- Publicized
- 2016/11/21
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.2016EBP3136
- Type of Manuscript
- PAPER
- Category
- Terrestrial Wireless Communication/Broadcasting Technologies
Authors
Tatsuhiko IWAKUNI
NTT Corporation
Kazuki MARUTA
NTT Corporation
Atsushi OHTA
NTT Corporation
Yushi SHIRATO
NTT Corporation
Takuto ARAI
NTT Corporation
Masataka IIZUKA
NTT Corporation
Keyword
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Tatsuhiko IWAKUNI, Kazuki MARUTA, Atsushi OHTA, Yushi SHIRATO, Takuto ARAI, Masataka IIZUKA, "Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels" in IEICE TRANSACTIONS on Communications,
vol. E100-B, no. 5, pp. 865-873, May 2017, doi: 10.1587/transcom.2016EBP3136.
Abstract: This paper proposes a null-space expansion scheme for multiuser massive MIMO transmission in order to suppress inter-user interference (IUI) triggered by the temporal variation of the channel. The downlink multiuser MIMO channel capacity of time varying channels is severely degraded since IUI must be suppressed at the transmitter side by using past estimated channel state information at the transmitter side (CSIT). Massive MIMO has emerged as one of the most promising technologies for further capacity enhancement by increasing the number of base station (BS) antenna elements. Exploiting the excess degrees of freedom (DoFs) inherent in massive MIMO, a BS with the proposed IUI suppression scheme performs multiple null-steering for each UE (User Equipment) antenna element, which expands the null-space dimension. Computer simulations show that the proposed scheme has superior IUI suppression performance to the existing channel prediction scheme in time varying channels.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2016EBP3136/_p
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@ARTICLE{e100-b_5_865,
author={Tatsuhiko IWAKUNI, Kazuki MARUTA, Atsushi OHTA, Yushi SHIRATO, Takuto ARAI, Masataka IIZUKA, },
journal={IEICE TRANSACTIONS on Communications},
title={Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels},
year={2017},
volume={E100-B},
number={5},
pages={865-873},
abstract={This paper proposes a null-space expansion scheme for multiuser massive MIMO transmission in order to suppress inter-user interference (IUI) triggered by the temporal variation of the channel. The downlink multiuser MIMO channel capacity of time varying channels is severely degraded since IUI must be suppressed at the transmitter side by using past estimated channel state information at the transmitter side (CSIT). Massive MIMO has emerged as one of the most promising technologies for further capacity enhancement by increasing the number of base station (BS) antenna elements. Exploiting the excess degrees of freedom (DoFs) inherent in massive MIMO, a BS with the proposed IUI suppression scheme performs multiple null-steering for each UE (User Equipment) antenna element, which expands the null-space dimension. Computer simulations show that the proposed scheme has superior IUI suppression performance to the existing channel prediction scheme in time varying channels.},
keywords={},
doi={10.1587/transcom.2016EBP3136},
ISSN={1745-1345},
month={May},}
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TY - JOUR
TI - Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels
T2 - IEICE TRANSACTIONS on Communications
SP - 865
EP - 873
AU - Tatsuhiko IWAKUNI
AU - Kazuki MARUTA
AU - Atsushi OHTA
AU - Yushi SHIRATO
AU - Takuto ARAI
AU - Masataka IIZUKA
PY - 2017
DO - 10.1587/transcom.2016EBP3136
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2017
AB - This paper proposes a null-space expansion scheme for multiuser massive MIMO transmission in order to suppress inter-user interference (IUI) triggered by the temporal variation of the channel. The downlink multiuser MIMO channel capacity of time varying channels is severely degraded since IUI must be suppressed at the transmitter side by using past estimated channel state information at the transmitter side (CSIT). Massive MIMO has emerged as one of the most promising technologies for further capacity enhancement by increasing the number of base station (BS) antenna elements. Exploiting the excess degrees of freedom (DoFs) inherent in massive MIMO, a BS with the proposed IUI suppression scheme performs multiple null-steering for each UE (User Equipment) antenna element, which expands the null-space dimension. Computer simulations show that the proposed scheme has superior IUI suppression performance to the existing channel prediction scheme in time varying channels.
ER -
English
