公开(公告)号：US20170208613A1

公开(公告)日：2017-07-20

申请号：US15477366

申请日：2017-04-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jun Young NAM ,  Jae Young AHN

IPC: H04W72/12 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0452 ,  H04B7/0456

CPC classification number: H04B7/0452 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0478 ,  H04B7/0482 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0634 ,  H04B7/0639 ,  H04L5/0048 ,  H04W72/1226

Abstract: The present invention relates to a multi-input and multi-output communication method in a large-scale antenna system. An MIMO transmission method according to the present invention includes: obtaining statistical channel information on at least one terminal, dividing terminals into a plurality of classes and a plurality of groups based on the statistical channel information, wherein the groups depend on the classes; determining a group beam-forming matrix for each of the divided groups; performing a group beamforming transmission by group based on the group beam-forming matrix to obtain instantaneous channel information; and scheduling terminals based on the instantaneous channel information. Thus, it is possible to decrease the complexity in a scheduling and precoding calculation without an increase in the amount of wireless resources that are required for providing feedback for a reference signal and channel status information.

公开(公告)号：US20190341976A1

公开(公告)日：2019-11-07

申请号：US16509116

申请日：2019-07-11

Applicant: Electronics and Telecommunications Research Institute

Inventor： Jun Young NAM ,  Jae Young AHN

IPC: H04B7/0452 ,  H04B7/0456 ,  H04L5/00 ,  H04W72/12 ,  H04B7/06

Abstract: The present invention relates to a multi-input and multi-output communication method in a large-scale antenna system. An MIMO transmission method according to the present invention includes: obtaining statistical channel information on at least one terminal, dividing terminals into a plurality of classes and a plurality of groups based on the statistical channel information, wherein the groups depend on the classes; determining a group beam-forming matrix for each of the divided groups; performing a group beamforming transmission by group based on the group beam-forming matrix to obtain instantaneous channel information; and scheduling terminals based on the instantaneous channel information. Thus, it is possible to decrease the complexity in a scheduling and precoding calculation without an increase in the amount of wireless resources that are required for providing feedback for a reference signal and channel status information.