公开(公告)号：EP2191584A2

公开(公告)日：2010-06-02

申请号：EP08832132.8

申请日：2008-09-12

申请人： NTT DoCoMo, Inc.

发明人： GOMADAM, Krishna ,  PAPADOPOULOS, Haralabos ,  SUNDBERG, Carl-erik, W.

IPC分类号： H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0417 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0617 ,  H04B7/0626 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2601

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.

摘要翻译： 一种方法，装置和系统是圆盘基于MU-MIMO和双向锻炼无线传输游离缺失英寸 在一个，实施例中的系统包括一组K个接收机的和具有一组N个发射天线，其中所述发射器可操作以基于多用于下行链路传输的信号进行预编码，以在集合K接收机，每个接收机的至少一个发射器 用户MIMO使用预编码基于所述集合K的接收机和该组的N个发射天线之间的双向信道推导出的锻炼