公开(公告)号：AU2017295643A1

公开(公告)日：2018-12-20

申请号：AU2017295643

申请日：2017-06-22

Applicant: QUALCOMM INC

Inventor： WEI CHAO ,  CHEN WANSHI ,  GAAL PETER ,  CHEN BO

IPC: H04B7/26

Abstract: Mapping with CSI-RS resources with a code divisional multiplex (CDM) length of eight is disclosed. Such mapping allows for flexibly configuring the set of resource elements (REs) for mapping based on the available CSI-RS resources.

公开(公告)号：AU2017240856A1

公开(公告)日：2018-09-06

申请号：AU2017240856

申请日：2017-02-17

Applicant: QUALCOMM INC

Inventor： CHEN BO ,  WEI CHAO ,  WU LIANGMING ,  WANG NENG

IPC: H04B7/06 ,  H04B7/26

Abstract: Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

公开(公告)号：AU2017239113A1

公开(公告)日：2018-08-30

申请号：AU2017239113

申请日：2017-03-10

Applicant: QUALCOMM INC

Inventor： WEI CHAO ,  CHEN BO ,  WU LIANGMING ,  HOU JILEI

IPC: H04W72/04

Abstract: Enhanced hybrid channel state information (CSI) reference signal (CSI-RS) for full dimension multiple input, multiple output (FD-MIMO) is discussed in which a base station configures a first CSI-RS resource for non-precoded CSI-RS and a second CSI-RS resource for beamformed CSI-RS. The first and second CSI-RS resources are associated with the same CSI process in a hybrid CSI-RS operation. The UE provides a first CSI report including a first rank and precoding matrix indicator (PMI) based on measurement of the non-precoded CSI-RS. The base station may use this first CSI report for the beamforming of the beamformed CSI-RS. The UE further provides a second CSI report including a second rank, second PMI, and CQI based on measurement of the beamformed CSI-RS. Additional aspects may provide for a base station to aggregate multiple two-port CSI-RS resource configurations into a single multiport CSI-RS resource configuration that may be dynamically shared between different UEs.