公开(公告)号：US20210126682A1

公开(公告)日：2021-04-29

申请号：US17069100

申请日：2020-10-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seung Eun HONG ,  In Kyeong CHOI ,  Tae Gyun NOH

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/024

Abstract: An operation method of a first AN for a hybrid beamforming-based cooperative transmission in a C-RAN includes obtaining a spatial channel covariance with terminals subject to a service; selecting a set of terminals to be serviced from among the terminals subject to the service; determining a radio frequency (RF) precoding matrix by which interference between the terminals to be serviced is minimized; transferring information on the determined RF precoding matrix to a centralized processor (CP); and generating an effective channel by configuring an RF precoder based on the determined RF precoding matrix.

公开(公告)号：US20200177242A1

公开(公告)日：2020-06-04

申请号：US16690658

申请日：2019-11-21

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min Hyun KIM ,  Tae Gyun NOH ,  In Kyeong CHOI ,  Seung Eun HONG

IPC: H04B7/024 ,  H04B7/06 ,  H04L5/00 ,  H04B7/08

Abstract: Disclosed are methods for transmitting and receiving beamforming-based signals in a communication system. An operation method of a terminal may comprise transmitting capability information of the terminal to an AN; receiving first configuration information of a network cluster configured based on the capability information from the AN; transmitting an SRS in a beamforming scheme through resources indicated by the first configuration information; receiving second configuration information of a user cluster configured based on a measurement result of the SRS from the AN; and performing cooperative communication with ANs belonging to the user cluster, which are indicated by the second configuration information. Accordingly, the performance of the communication system can be improved.