Behavior of a Multi-User MIMO System in Time-Varying Environments

Ogawa, Yasutaka; Yamaguchi, Kanako; Huu Phu Bui; Nishimura, Toshihiko; Ohgane, Takeo

Behavior of a Multi-User MIMO System in Time-Varying Environments

Ogawa, Yasutaka; Yamaguchi, Kanako; Huu Phu Bui et al.

IEICE Transactions on Communications, 2013, E96B(10), 2364-2371

Permalink : https://hdl.handle.net/2115/54750

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アクセス権	open access
URI	https://hdl.handle.net/2115/54750
タイトル	Behavior of a Multi-User MIMO System in Time-Varying Environments
著者	Ogawa, Yasutaka ; Yamaguchi, Kanako ; Huu Phu Bui ; Nishimura, Toshihiko ; Ohgane, Takeo
e-Rad_Researcher 70125293 著者名 Ogawa, Yasutaka
著者名 Yamaguchi, Kanako
著者名 Huu Phu Bui
e-Rad_Researcher 70301934 著者名 Nishimura, Toshihiko
e-Rad_Researcher 10271636 著者名 Ohgane, Takeo
言語	英語
キーワード	multi-user MIMO system
	channel state information
	time-varying environment
	channel prediction
	autoregressive (AR) model-based prediction
発行日	2013-10
出版者	The Institute of Electronics, Information and Communication Engineers
収録物名	IEICE Transactions on Communications
巻(号)	E96B(10)
ページ	2364-2371
抄録	We evaluated the behavior of a multi-user multiple-input multiple-output (MIMO) system in time-varying channels using measured data. A base station for downlink or broadcast transmission requires downlink channel state information (CSI), which is outdated in time-varying environments and we encounter degraded performance due to interference. One of the countermeasures against time-variant environments is predicting channels with an autoregressive (AR) model-based method. We modified the AR prediction for a time division duplex system. We conducted measurement campaigns in indoor environments to verify the performance of the scheme of channel prediction in an actual environment and measured channel data. We obtained the bit-error rate (BER) using these data. The AR-model-based technique of prediction assuming the Jakes' model was found to reduce BER. Also, the optimum AR-model order was investigated by using the channel data we measured.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	copyright©2013 The Institute of Electronics, Information and Communication Engineers
PISSN	0916-8516
関連情報	URI http://search.ieice.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1587/transcom.E96.B.2364