FFT-Based Block Diagonalization at User Terminal for Implicit Beamforming in Multiuser MIMO System
Summary :
This paper proposes Fast Fourier Transform (FFT) based orthogonal beam selection method at the user terminals (UTs) to reduce the number of nulls for the other users except an intended user by the Block Diagonalization (BD) algorithm in multiuser MIMO (MU-MIMO) sytems. The BD algorithm has been proposed in order to realize MU-MIMO broadcast transmission with a realistic signal processing burden. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. The proposed method realizes the performance improvement compared to the conventional BD algorithm without the burden on the UTs. It is verified via bit error rate (BER) evaluation that the proposed method is effective compared to the conventional BD algorithm and antenna selection method. Moreover, the effectiveness of proposed method is verified by the performance evaluation considering medium access control (MAC) layer in a comparison with the conventional BD algorithm which needs the channel state information (CSI) feedback. Because the proposed method can be easily applied to beamforming without the CSI feedback (implicit beamforming), it is shown that the propose method is effective from a point of view on the transmission efficiency in MU-MIMO system.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E99-B No.1 pp.115-123
- Publication Date
- 2016/01/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.2015ISP0019
- Type of Manuscript
- Special Section PAPER (Special Section on Recent Progress in Antennas, Propagation and Wireless Systems Related to Topics in ISAP2014)
- Category
- Antennas and Propagation
Authors
Hayate KIMOTO
Niigata University
Kentaro NISHIMORI
Nippon Institute of Technology
Takefumi HIRAGURI
Niigata University
Hideo MAKINO
Niigata University
Keyword
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Hayate KIMOTO, Kentaro NISHIMORI, Takefumi HIRAGURI, Hideo MAKINO, "FFT-Based Block Diagonalization at User Terminal for Implicit Beamforming in Multiuser MIMO System" in IEICE TRANSACTIONS on Communications,
vol. E99-B, no. 1, pp. 115-123, January 2016, doi: 10.1587/transcom.2015ISP0019.
Abstract: This paper proposes Fast Fourier Transform (FFT) based orthogonal beam selection method at the user terminals (UTs) to reduce the number of nulls for the other users except an intended user by the Block Diagonalization (BD) algorithm in multiuser MIMO (MU-MIMO) sytems. The BD algorithm has been proposed in order to realize MU-MIMO broadcast transmission with a realistic signal processing burden. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. The proposed method realizes the performance improvement compared to the conventional BD algorithm without the burden on the UTs. It is verified via bit error rate (BER) evaluation that the proposed method is effective compared to the conventional BD algorithm and antenna selection method. Moreover, the effectiveness of proposed method is verified by the performance evaluation considering medium access control (MAC) layer in a comparison with the conventional BD algorithm which needs the channel state information (CSI) feedback. Because the proposed method can be easily applied to beamforming without the CSI feedback (implicit beamforming), it is shown that the propose method is effective from a point of view on the transmission efficiency in MU-MIMO system.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2015ISP0019/_p
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@ARTICLE{e99-b_1_115,
author={Hayate KIMOTO, Kentaro NISHIMORI, Takefumi HIRAGURI, Hideo MAKINO, },
journal={IEICE TRANSACTIONS on Communications},
title={FFT-Based Block Diagonalization at User Terminal for Implicit Beamforming in Multiuser MIMO System},
year={2016},
volume={E99-B},
number={1},
pages={115-123},
abstract={This paper proposes Fast Fourier Transform (FFT) based orthogonal beam selection method at the user terminals (UTs) to reduce the number of nulls for the other users except an intended user by the Block Diagonalization (BD) algorithm in multiuser MIMO (MU-MIMO) sytems. The BD algorithm has been proposed in order to realize MU-MIMO broadcast transmission with a realistic signal processing burden. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. The proposed method realizes the performance improvement compared to the conventional BD algorithm without the burden on the UTs. It is verified via bit error rate (BER) evaluation that the proposed method is effective compared to the conventional BD algorithm and antenna selection method. Moreover, the effectiveness of proposed method is verified by the performance evaluation considering medium access control (MAC) layer in a comparison with the conventional BD algorithm which needs the channel state information (CSI) feedback. Because the proposed method can be easily applied to beamforming without the CSI feedback (implicit beamforming), it is shown that the propose method is effective from a point of view on the transmission efficiency in MU-MIMO system.},
keywords={},
doi={10.1587/transcom.2015ISP0019},
ISSN={1745-1345},
month={January},}
Copy
TY - JOUR
TI - FFT-Based Block Diagonalization at User Terminal for Implicit Beamforming in Multiuser MIMO System
T2 - IEICE TRANSACTIONS on Communications
SP - 115
EP - 123
AU - Hayate KIMOTO
AU - Kentaro NISHIMORI
AU - Takefumi HIRAGURI
AU - Hideo MAKINO
PY - 2016
DO - 10.1587/transcom.2015ISP0019
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E99-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2016
AB - This paper proposes Fast Fourier Transform (FFT) based orthogonal beam selection method at the user terminals (UTs) to reduce the number of nulls for the other users except an intended user by the Block Diagonalization (BD) algorithm in multiuser MIMO (MU-MIMO) sytems. The BD algorithm has been proposed in order to realize MU-MIMO broadcast transmission with a realistic signal processing burden. The BD algorithm cancels inter-user interference by creating the weights so that the channel matrixes for the other users are set to be zero matrixes. However, when the number of transmit antennas is equals to the total number of received antennas, the transmission rate by the BD algorithm is decreased. The proposed method realizes the performance improvement compared to the conventional BD algorithm without the burden on the UTs. It is verified via bit error rate (BER) evaluation that the proposed method is effective compared to the conventional BD algorithm and antenna selection method. Moreover, the effectiveness of proposed method is verified by the performance evaluation considering medium access control (MAC) layer in a comparison with the conventional BD algorithm which needs the channel state information (CSI) feedback. Because the proposed method can be easily applied to beamforming without the CSI feedback (implicit beamforming), it is shown that the propose method is effective from a point of view on the transmission efficiency in MU-MIMO system.
ER -
English
