公开(公告)号：US08731091B2

公开(公告)日：2014-05-20

申请号：US13318145

申请日：2010-04-30

申请人： Jianjun Li ,  Jae Hyeon Ahn ,  Zhengzi Li ,  Hyung Joon Jeon

发明人： Jianjun Li ,  Jae Hyeon Ahn ,  Zhengzi Li ,  Hyung Joon Jeon

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04B7/0413 ,  H04B7/0639 ,  H04L25/03942 ,  H04L2025/03764

摘要： Disclosed is a method for determining precoding matrix based on an open-loop MIMO scheme, which can enhance a diversity gain at a static communication environment or a low-mobility communication environment. The method for determining precoding matrix applies a first precoding matrix to downstream data to transmit the downstream data through a plurality of antennas, the first precoding matrix being selected from a codebook which comprises a plurality of precoding matrixes, and changes the first precoding matrix to a second precoding matrix per predetermined period, and applying the second precoding matrix to the downstream data to transmit the downstream data through the antennas. The second precoding matrix is a precoding matrix corresponding to an index which has been shifted by a certain value from an index of the first precoding matrix in a direction where an index of a precoding matrix increases, in the codebook.

摘要翻译： 公开了一种基于开环MIMO方案确定预编码矩阵的方法，其可以增强静态通信环境或低移动性通信环境下的分集增益。 用于确定预编码矩阵的方法将第一预编码矩阵应用于下游数据以通过多个天线发送下行数据，所述第一预编码矩阵从包括多个预编码矩阵的码本中选择，并将第一预编码矩阵改变为 第二预编码矩阵，并且将第二预编码矩阵应用于下游数据，以通过天线发送下行数据。 第二预编码矩阵是与编码本中预编码矩阵的索引增加的方向上已经从第一预编码矩阵的索引偏移特定值的索引相对应的预编码矩阵。

公开(公告)号：US20110026482A1

公开(公告)日：2011-02-03

申请号：US12934932

申请日：2008-12-26

申请人： Jianjun Li ,  Jung Nam Yun ,  Zhengzi Li ,  Dong Jun Lee ,  Jae Hyeong Kim

发明人： Jianjun Li ,  Jung Nam Yun ,  Zhengzi Li ,  Dong Jun Lee ,  Jae Hyeong Kim

IPC分类号： H04W74/02

CPC分类号： H04W72/044 ,  H04L5/0048 ,  H04L5/005 ,  H04W48/08

摘要： A method and apparatus for pilot signal transmission is disclosed, which is capable of improving efficiency in a wireless communication system, the method comprising transmitting an uplink transmission frame for a first sector or cell by a mobile station through the use of basic pilot pattern in a resource block and transmitting an uplink transmission frame for a second sector or cell by the mobile station through the use of shift pilot pattern which is not overlapped with the basic pilot pattern in the resource block.

摘要翻译： 公开了一种用于导频信号传输的方法和装置，其能够提高无线通信系统的效率，所述方法包括：通过使用基本导频模式，由移动台向第一扇区或小区发送上行链路传输帧 资源块，并且由移动台通过使用不与资源块中的基本导频模式重叠的移位导频模式来发送用于第二扇区或小区的上行链路传输帧。

公开(公告)号：US20120045019A1

公开(公告)日：2012-02-23

申请号：US13318145

申请日：2010-04-30

申请人： Jianjun Li ,  Jae Hyeon Ahn ,  Zhengzi Li ,  Hyung Joon Jeon

发明人： Jianjun Li ,  Jae Hyeon Ahn ,  Zhengzi Li ,  Hyung Joon Jeon

IPC分类号： H04L25/497

CPC分类号： H04B7/0413 ,  H04B7/0639 ,  H04L25/03942 ,  H04L2025/03764

摘要： Disclosed is a method for determining precoding matrix based on an open-loop MIMO scheme, which can enhance a diversity gain at a static communication environment or a low-mobility communication environment. The method for determining precoding matrix applies a first precoding matrix to downstream data to transmit the downstream data through a plurality of antennas, the first precoding matrix being selected from a codebook which comprises a plurality of precoding matrixes, and changes the first precoding matrix to a second precoding matrix per predetermined period, and applying the second precoding matrix to the downstream data to transmit the downstream data through the antennas. The second precoding matrix is a precoding matrix corresponding to an index which has been shifted by a certain value from an index of the first precoding matrix in a direction where an index of a precoding matrix increases, in the codebook

摘要翻译： 公开了一种基于开环MIMO方案确定预编码矩阵的方法，其可以增强静态通信环境或低移动性通信环境下的分集增益。 用于确定预编码矩阵的方法将第一预编码矩阵应用于下游数据以通过多个天线发送下行数据，所述第一预编码矩阵从包括多个预编码矩阵的码本中选择，并将第一预编码矩阵改变为 第二预编码矩阵，并且将第二预编码矩阵应用于下游数据，以通过天线发送下行数据。 第二预编码矩阵是对应于在码本中在预编码矩阵的索引增加的方向上已经从第一预编码矩阵的索引偏移特定值的索引的预编码矩阵

公开(公告)号：US08948098B2

公开(公告)日：2015-02-03

申请号：US12990861

申请日：2009-04-30

申请人： Jianjun Li ,  Zhengzi Li ,  Jung Nam Yun ,  Dong Jun Lee ,  Jae Hyeong Kim

发明人： Jianjun Li ,  Zhengzi Li ,  Jung Nam Yun ,  Dong Jun Lee ,  Jae Hyeong Kim

IPC分类号： H04W4/00 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/0452 ,  H04B7/0617 ,  H04B7/0626

摘要： Disclosed is a frame transmission method using precoding for supporting MU-MIMO, which facilitates to reduce overhead of a downlink frame in a wireless communication system of FDD method, and a base station supporting that method. The frame transmission method comprises calculating a precoding matrix of a present frame based on channel state information (CSI) of each mobile station and a precoding matrix of a prior frame; precoding a dedicated pilot and downlink data to be transmitted to the mobile station by the use of precoding matrix of the present frame; and transmitting a downlink frame including the precoded dedicated pilot and precoded downlink data to the corresponding mobile station.

摘要翻译： 公开了一种使用用于支持MU-MIMO的预编码的帧传输方法，其有助于降低FDD方法的无线通信系统中的下行链路帧的开销，以及支持该方法的基站。 帧发送方法包括基于每个移动台的信道状态信息（CSI）和现有帧的预编码矩阵来计算当前帧的预编码矩阵; 通过使用当前帧的预编码矩阵来预编码要发送到移动台的专用导频和下行链路数据; 以及将包含预编码的专用导频和预编码的下行链路数据的下行链路帧发送到对应的移动台。

公开(公告)号：US20110134859A1

公开(公告)日：2011-06-09

申请号：US12990861

申请日：2009-04-30

申请人： Jianjun Li ,  Zhengzi Li ,  Jung Nam Yun ,  Dong Jun Lee ,  Jae Hyeong Kim

发明人： Jianjun Li ,  Zhengzi Li ,  Jung Nam Yun ,  Dong Jun Lee ,  Jae Hyeong Kim

IPC分类号： H04W72/04

CPC分类号： H04B7/0452 ,  H04B7/0617 ,  H04B7/0626

摘要： Disclosed is a frame transmission method using precoding for supporting MU-MIMO, which facilitates to reduce overhead of a downlink frame in a wireless communication system of FDD method, and a base station supporting that method. The frame transmission method comprises calculating a precoding matrix of a present frame based on channel state information (CSI) of each mobile station and a precoding matrix of a prior frame; precoding a dedicated pilot and downlink data to be transmitted to the mobile station by the use of precoding matrix of the present frame; and transmitting a downlink frame including the precoded dedicated pilot and precoded downlink data to the corresponding mobile station.

摘要翻译： 公开了一种使用用于支持MU-MIMO的预编码的帧传输方法，其有助于降低FDD方法的无线通信系统中的下行链路帧的开销，以及支持该方法的基站。 帧发送方法包括基于每个移动台的信道状态信息（CSI）和现有帧的预编码矩阵来计算当前帧的预编码矩阵; 通过使用当前帧的预编码矩阵来预编码要发送到移动台的专用导频和下行链路数据; 以及将包含预编码的专用导频和预编码的下行链路数据的下行链路帧发送到对应的移动台。