公开(公告)号：US09800388B2

公开(公告)日：2017-10-24

申请号：US14599388

申请日：2015-01-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bruno Clerckx ,  Jun Il Choi ,  Ki Il Kim

IPC: H04W4/00 ,  H04L5/00 ,  H04W24/10 ,  H04L1/00 ,  H04L25/03 ,  H04B7/04 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04W72/04 ,  H04B7/06

CPC classification number: H04L5/0057 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0486 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/0036 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W24/10 ,  H04W72/0413

Abstract: Provided is a feedback method and apparatus in a multiple-input multiple-output (MIMO) communication system. A terminal may determine a preferred pre-coding matrix for a neighboring terminal, based on a reference rank determined by a base station and a preferred pre-coding matrix of the terminal. The terminal may calculate a channel quality indicator (CQI) based on the preferred precoding matrix for the neighboring terminal, and may feed the CQI back to the base station.

公开(公告)号：US09628160B2

公开(公告)日：2017-04-18

申请号：US14177889

申请日：2014-02-11

Applicant: Samsung Electronics Co., Ltd.

Inventor： Jun Il Choi ,  Bruno Clerckx ,  Ki Il Kim

IPC: H04L1/02 ,  H04B7/04 ,  H04B7/06 ,  H04W72/04 ,  H04L25/03 ,  H04L1/00 ,  H04B3/32 ,  H04L27/36 ,  H03F1/32

CPC classification number: H04B7/0486 ,  H03F1/3247 ,  H04B3/32 ,  H04B7/0417 ,  H04B7/0478 ,  H04B7/0639 ,  H04L1/0003 ,  H04L25/03343 ,  H04L27/368 ,  H04W72/04

Abstract: A transmitter and a receiver of a multiple input multiple output (MIMO) communication system may use two codebooks to share channel information. When the transmitter uses eight transmit antennas, two codebooks may be defined. When the receiver generates two precoding matrix indicators from two codebooks, a combination of the two precoding matrix indicators may indicate a single precoding matrix. Precoding matrix candidates may also be defined.

公开(公告)号：US10469237B2

公开(公告)日：2019-11-05

申请号：US15714815

申请日：2017-09-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Bruno Clerckx ,  Jun Il Choi ,  Ki Il Kim

IPC: H04L5/00 ,  H04W24/10 ,  H04L1/00 ,  H04L25/03 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/0417 ,  H04B7/0452 ,  H04W72/04

Abstract: Provided is a feedback method and apparatus in a multiple-input multiple-output (MIMO) communication system. A terminal may determine a preferred pre-coding matrix for a neighboring terminal, based on a reference rank determined by a base station and a preferred pre-coding matrix of the terminal. The terminal may calculate a channel quality indicator (CQI) based on the preferred precoding matrix for the neighboring terminal, and may feed the CQI back to the base station.