公开(公告)号：US10148478B2

公开(公告)日：2018-12-04

申请号：US14581967

申请日：2014-12-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Chang Wahn Yu ,  Hee Soo Lee ,  Sok Kyu Lee

IPC: H04L27/26 ,  H04B7/06 ,  H04L25/02 ,  H04B7/08

Abstract: A method and apparatus for estimating a channel in a wireless local area network (WLAN) are provided. A channel estimation apparatus may include a channel estimation information combiner to combine at least one channel estimation information based on a difference between cyclic delay diversity (CDD) values, and a phase applier to generate a first phase value and to apply the first phase value to the combined channel estimation information.

公开(公告)号：US09762301B2

公开(公告)日：2017-09-12

申请号：US14808662

申请日：2015-07-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Seong Rag Kim ,  Hee Soo Lee

IPC: H04M1/00 ,  H04B7/0452 ,  H04B7/06 ,  H04B7/022 ,  H04B7/08 ,  H04W88/08 ,  H04W88/02

CPC classification number: H04B7/0452 ,  H04B7/022 ,  H04B7/0695 ,  H04B7/086 ,  H04W88/02 ,  H04W88/085

Abstract: Disclosed are a terminal and a base station for a distributed array massive multiple-input and multiple-output (MIMO) communication antenna system and an operation method thereof, wherein the terminal includes a distribution analog unit receiving a plurality of analog array receive signals based on a terminal antenna transmit signal from a virtual terminal through a plurality of distributed antenna arrays and a digital unit restoring the terminal antenna transmit signal based on the analog array receive signals and a channel parameter, and the base station includes an antenna receiving an analog receive signal based on a transmit beamforming input signal from a plurality of distributed antenna arrays, a virtual terminal restoring the transmit beamforming input signal based on an amplitude of the analog receive signal, and a terminal receive signal mapper mapping the transmit beamforming input signal to a base station transmit signal.