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

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

doi:10.1587/transcom.E96.B.2364


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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/54750

Title:	Behavior of a Multi-User MIMO System in Time-Varying Environments
Authors:	Ogawa, Yasutaka Browse this author →KAKEN DB
	Yamaguchi, Kanako Browse this author
	Huu Phu Bui Browse this author
	Nishimura, Toshihiko Browse this author →KAKEN DB
	Ohgane, Takeo Browse this author →KAKEN DB
Keywords:	multi-user MIMO system
	channel state information
	time-varying environment
	channel prediction
	autoregressive (AR) model-based prediction
Issue Date:	Oct-2013
Publisher:	The Institute of Electronics, Information and Communication Engineers
Journal Title:	IEICE Transactions on Communications
Volume:	E96B
Issue:	10
Start Page:	2364
End Page:	2371
Publisher DOI:	10.1587/transcom.E96.B.2364
Abstract:	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 A base station for downlink or broadcast transmission requires downlink channel state information (CSI), which is outdated in time-varying environments and we encounter degraded performance due to interference.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.
Rights:	copyright©2013 The Institute of Electronics, Information and Communication Engineers
Relation:	http://search.ieice.org/
Type:	article
URI:	http://hdl.handle.net/2115/54750
Appears in Collections:	情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小川恭孝

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