公开(公告)号：US10348384B1

公开(公告)日：2019-07-09

申请号：US15904325

申请日：2018-02-24

Applicant: Hong Kong Applied Science and Technology Research Institute Co., Ltd.

Inventor： Jia Ni ,  Yuxian Zhang ,  Mai Wai Kwan ,  Kong Chau Tsang

IPC: H04B7/06 ,  H04B7/0456 ,  G06F17/14

Abstract: Provided is a method of determining Channel State Information (CSI) in a multiple input/multiple output (MIMO) wireless communication system. The CSI may comprise a Precoding Matrix Indicator (PMI) and/or a Rank Indicator (RI). The method comprises, for a matrix of channels comprising a link between a gNodeB (gNB) and a user equipment (UE), determining correlation values between all Discrete Fourier Transform (DFT) vectors and the observations from the channel matrix. The DFT vectors may include the horizontal vector direction and the vertical vector direction. The method includes selecting those DFT vectors in one or more selected vector directions having a correlation value greater than a predefined threshold to thereby identify a subset of all DFT vectors and determining said CSI from the selected subset of DFT vectors.