公开(公告)号：EP3198743A4

公开(公告)日：2018-06-13

申请号：EP14902804

申请日：2014-09-28

Applicant: QUALCOMM INC

Inventor： WEI CHAO ,  ZHANG YU ,  HOU JILEI

IPC: H04B7/0456

CPC classification number: H04B7/0626 ,  H04B7/0469 ,  H04B7/0478

Abstract: Methods and corresponding apparatuses for wireless communication are disclosed. The method for wireless communication includes dividing a two-dimensional antenna array to a plurality of sub-arrays, mapping the two-dimensional antenna array into a one-dimensional vertical channel state information reference signal (CSI-RS) port array for receiving elevation CSI feedback and a one-dimensional horizontal CSI-RS port array for receiving azimuth CSI feedback, and transmitting one or more elevation CSI-RS from the one-dimensional vertical CSI-RS port array and one or more azimuth CSI-RS from the one-dimensional horizontal CSI-RS port array. Methods and corresponding apparatuses for CSI feedback mechanism are also disclosed.

公开(公告)号：EP3295592A1

公开(公告)日：2018-03-21

申请号：EP15892259

申请日：2015-06-03

Applicant: QUALCOMM INC

Inventor： WEI CHAO ,  ZHANG YU ,  CHEN WANSHI ,  GAAL PETER

IPC: H04L1/06

CPC classification number: H04L1/0031 ,  H04B7/0626 ,  H04B7/0632 ,  H04L1/0026

Abstract: Enhanced channel state information (CSI) procedures for full dimension-multiple input, multiple output (FD-MIMO) is discussed in which a number of CSI reference signal (CSI-RS) ports configured for a user equipment (UE) is determined. In response to the CSI-RS ports including both horizontal and vertical ports, the UE may determine a first precoding matrix from a plurality of precoding matrices constructed by a Kronecker product of a horizontal precoding matrix and a vertical precoding matrix. The UE selects a predetermined number of precoding vectors out of the first precoding matrix and generates a wideband precoding matrix, based on the selected predetermined number of precoding vectors. The UE reports one or more CSI reports, wherein the CSI reports includes at least one precoding matrix indicator (PMI) for the first precoding matrix and at least an indication of the selection of the predetermined number of precoding vectors.