公开(公告)号：US20130163457A1

公开(公告)日：2013-06-27

申请号：US13728510

申请日：2012-12-27

申请人： Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Korea National University of Transportation

发明人： Kiil KIM ,  Cheol MUN ,  Younsun KIM ,  Juho LEE ,  Hyojin LEE ,  Joonyoung CHO

IPC分类号： H04W24/02

CPC分类号： H04W24/02 ,  H04B7/0417 ,  H04B7/0478 ,  H04B7/0639 ,  H04L5/0023 ,  H04L25/0204 ,  H04W16/28 ,  H04W72/085

摘要： A Channel State Information (CSI) feedback method and apparatus is provided for transmitting, at a base station, the CSIs for plural transmit antennas with a limited amount resource and receiving, at a mobile station, the CSIs efficiently in a massive Multiple Input Multiple Output (MIMO) system operating in the Frequency Division Duplex (FDD) mode.

摘要翻译： 提供了一种信道状态信息（CSI）反馈方法和装置，用于在基站处发送具有有限资源资源的多个发射天线的CSI，并在移动台以高质量的多输入多输出方式接收CSI （MIMO）系统以频分双工（FDD）模式工作。

公开(公告)号：US20130163544A1

公开(公告)日：2013-06-27

申请号：US13728450

申请日：2012-12-27

申请人： Samsung Electronics Co., Ltd. ,  Industry-Academic Cooperation Foundation, Korea National University of Transportation

发明人： Hyojin LEE ,  Cheol MUN ,  Kiil KIM ,  Younsun KIM ,  Juho LEE ,  Joonyoung CHO

IPC分类号： H04W72/04

CPC分类号： H04W72/04 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0695 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0091 ,  H04L5/143

摘要： Methods and apparatus are provided for beamforming and information feedback are provided. Signals for beams to be transmitted through corresponding antenna ports, are generated. The beams are formed by precoding the signals with beamforming vectors. The beams are sorted into a number of resource reuse groups based on a resource that is to be shared. The beams are transmitted, using resources allocated per group, to a receiver. Feedback information is generated on at least one antenna port, based on the received beams. The feedback information is transmitted to the transmitter. A beam is selected having a greatest gain for a transmitter using the feedback information. A transmission resource is allocated for the selected beam.

摘要翻译： 提供了波束形成和信息反馈的方法和装置。 产生用于通过相应的天线端口传输的波束的信号。 通过用波束形成向量对信号进行预编码来形成波束。 基于要共享的资源将光束分类为多个资源重用组。 使用每组分配的资源将光束传输到接收器。 基于所接收的波束，在至少一个天线端口上产生反馈信息。 反馈信息被发送到发送器。 选择使用反馈信息对于发射机具有最大增益的波束。 为所选择的光束分配传输资源。

公开(公告)号：US20150373736A1

公开(公告)日：2015-12-24

申请号：US14762159

申请日：2014-01-15

申请人： SAMSUNG ELECTRONICS CO., LTD. ,  KOREA NATIONAL UNIVERSITY OF TRANSPORTATION INDUSTTRY ACADEMIC COOPERATION FOUNDATION

发明人： Hyoungju JI ,  Cheol MUN ,  Younsun KIM ,  Juho LEE ,  Hyojin LEE ,  Joonyoung CHO

IPC分类号： H04W72/12 ,  H04B7/04 ,  H04B7/06 ,  H04L5/00

CPC分类号： H04B7/0413 ,  H04B7/0697 ,  H04B7/2621 ,  H04L5/0023 ,  H04L5/0048 ,  H04W72/1273

摘要： The present invention proposes a hybrid spatial multiplexing (SM) and a space division multiple access (SDMA) technique in a frequency division duplex (FDD) massive multiple-input multiple output (MIMO) system using a two-dimensional planar array antenna, which effectively transmits a channel state information reference signal (CSI-RS) for estimating a downlink two-dimensional space channel using only a limited amount of downlink radio resources, and optimally selects and performs the SM and SDMA techniques in a two-dimensional space channel. To this end, the present invention proposes a technique which defines space resource blocks (SRB) by grouping space elements (SE) having a high spatial correlation between downlink channels in the horizontal dimension and corresponding SEs thereof in the vertical dimension, and transmits CSI-RSs for estimating channels in vertical dimension SEs corresponding to one selected horizontal SE in each SRB every transmit time interval (TTI). The present invention proposes a technique wherein user equipment (UE) estimates the spatial correlation between channels of different horizontal dimension SEs belonging to the same SRB received in different TTIs and the spatial correlation between channels of horizontal dimension SEs belonging to different SRBs received in the same TTI, and feeds information for changing the size of SRB of the corresponding UE to an optimal size back to eNodeB. The present invention proposes a technique wherein the UE estimates downlink channels through CSI-RSs transmitted from each SRB, and each UE feeds an index of a preferred SRB, a rank of the corresponding SRB in the vertical dimension, and channel quality information (CQI) back to eNodeB. When each UE determines the rank, it is possible to transmit the ranks to the fullest extent in the vertical dimension and only a single rank from each SRB in the horizontal dimension.