发明公开
EP2191584A2 METHODS AND APPARATUS FOR WIDEBAND TRANSMISSION BASED ON MULTI-USER MIMO AND TWO-WAY TRAINING
审中-公开
基于对多用户MIMO的方法和设备的宽带传输确保两ZWEIWEGSCHULUNG
- 专利标题： METHODS AND APPARATUS FOR WIDEBAND TRANSMISSION BASED ON MULTI-USER MIMO AND TWO-WAY TRAINING
- 专利标题（中）： 基于对多用户MIMO的方法和设备的宽带传输确保两ZWEIWEGSCHULUNG
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申请号： EP08832132.8申请日： 2008-09-12
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公开(公告)号： EP2191584A2公开(公告)日： 2010-06-02
- 发明人: GOMADAM, Krishna , PAPADOPOULOS, Haralabos , SUNDBERG, Carl-erik, W.
- 申请人： NTT DoCoMo, Inc.
- 申请人地址： Sanno Park Tower 11-1 Nagata-cho 2-chome Chiyoda-Ku Tokyo 100-6150 JP
- 专利权人： NTT DoCoMo, Inc.
- 当前专利权人： NTT DoCoMo, Inc.
- 当前专利权人地址： Sanno Park Tower 11-1 Nagata-cho 2-chome Chiyoda-Ku Tokyo 100-6150 JP
- 代理机构： Bartle, Robin Jonathan
- 优先权： US973625P 20070919; US209110 20080911
- 国际公布： WO2009039043 20090326
- 主分类号： H04B7/04
- IPC分类号： H04B7/04 ; H04B7/06
摘要：
A method, apparatus and system is disclosed herein for wireless transmission based on MU-MIMO and two-way training. In one embodiment, the system comprises a set of K receivers and at least one transmitter having a set of N transmit antennas, where the transmitter is operable to precode a signal for downlink transmission to each receiver in the set of K receivers based on multi-user MIMO using precoding derived based on two-way channel training between the set of K receivers and the set of N transmit antennas. In another embodiment, the method comprises a transmitter receiving K pilot symbols, each K pilot symbol being transmitted by one of the set of K receivers; estimating channels directly at the transmitter based on received K pilot symbols; deriving a MU-MIMO precoder using the channel estimates; transmitting 1 to K pilot symbols using the MU-MIMO precoder to the set of K receivers to enable the K receivers to estimate their respective effective channels; and sending a downlink transmission using the MU-MIMO precoder to at least one of the set of K receivers.
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