Title:
無線通信システムにおけるマルチユーザ多重入力多重出力フィードバック及び転送
Document Type and Number:
Japanese Patent JP4995319
Kind Code:
B2
Abstract:
The present invention provides a method for feedback and transmission of multi-user (MU) multiple input multiple output (MIMO) in a wireless communication system. The method includes steps of selecting subset codebook or full code book based on traffic load of a base station, and broadcasting the selected codebook to user equipments. In high traffic load, subset codebook is selected, and in low traffic load, full codebook is selected. User stations calculated a channel quality indicator of a spatial codeword vector that is included in the selected codebook. Information of the maximum channel quality indicator is sent to the base station together with a precoder of the user equipment. The base station selects user equipments based on the information of the maximum channel quality indicator and precoder, and transmits precoder signal and data signal to the user equipments. The present invention also provides a system for the base station that causes the base station to perform the above mentioned operations.
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Inventors:
Faruk Khan
Jang Tsang
Cornelius Van Lensburg
Jang Tsang
Cornelius Van Lensburg
Application Number:
JP2010510212A
Publication Date:
August 08, 2012
Filing Date:
May 29, 2008
Export Citation:
Assignee:
Samsung Electronics Company Limited
International Classes:
H04J99/00; H04B7/04; H04J11/00
Foreign References:
| WO2007092539A1 |
Other References:
Jun Yuan , Mo-Han Fong, Kathiravetpillai Sivanesan, Sophie Vrzic, Robert Novak, Dongsheng Yu, Sang-Youb Kim,Proposal for IEEE 802.16m Differential Encoding/Decoding forCL-MIMO Codebook Feedback,IEEE C802.16m-08/347,2008年 5月 5日
Kim, J.S.; Hojin Kim; Yongxing Zhou; Jianjun Li; ,Multi-Mode Multi-User MIMO System with Finite Rate Feedback ,Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on ,2006年 9月 8日
James S. Kim, Hojin Kim, Yongxing Zhou,and Jianjun Li,On the Performance of Limited FeedbackSingle-/Multi-User MIMO in 3GPP LTE Systems,Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on ,2006年 9月 8日
Kim, J.S.; Hojin Kim; Yongxing Zhou; Jianjun Li; ,Multi-Mode Multi-User MIMO System with Finite Rate Feedback ,Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on ,2006年 9月 8日
James S. Kim, Hojin Kim, Yongxing Zhou,and Jianjun Li,On the Performance of Limited FeedbackSingle-/Multi-User MIMO in 3GPP LTE Systems,Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on ,2006年 9月 8日
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro