公开(公告)号：US20110064035A1

公开(公告)日：2011-03-17

申请号：US12634250

申请日：2009-12-09

申请人： Igor Moáco Guerreiro ,  Charles Casimiro Cavalcante ,  Darlan Cavalcante Moreira ,  Dennis Hui ,  Icaro L. Silva

发明人： Igor Moáco Guerreiro ,  Charles Casimiro Cavalcante ,  Darlan Cavalcante Moreira ,  Dennis Hui ,  Icaro L. Silva

IPC分类号： H04B15/00 ,  H04W72/00

CPC分类号： H04B1/1027 ,  H04B7/0434 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/345

摘要： According to the teachings presented herein, each base station in a group of base stations is linked to an associated terminal as a receiver-transmitter pair. These receiver-transmitter pairs reuse channelization resources, such that each terminal represents a source of other-cell interference (also referred to as multi-user interference or MUI) for other terminals in neighboring cells that are reusing all or some of the same channelization resources. Accordingly, the base stations implement a gaming-based algorithm to mitigate MUI for the multiple-input-multiple-output (MIMO) uplink signals received from their associated terminals. More particularly, each base station functions as a player in a game, in which the allowed gaming action is the selection of the precoding matrix to be used for MIMO uplink transmissions to the base station from an associated terminal.

摘要翻译： 根据本文给出的教导，一组基站中的每个基站作为接收机 - 发射机对链接到相关联的终端。 这些接收机 - 发射机对重用信道化资源，使得每个终端表示对相邻小区中用于重用所有或一些相同信道化资源的相邻小区中的其他终端的其他小区干扰源（也称为多用户干扰或MUI） 。 因此，基站实施基于游戏的算法来减轻从其相关终端接收的多输入多输出（MIMO）上行链路信号的MUI。 更具体地，每个基站用作游戏中的玩家，其中允许的游戏动作是选择用于从相关联的终端到基站的MIMO上行链路传输的预编码矩阵。

公开(公告)号：US09148244B2

公开(公告)日：2015-09-29

申请号：US13567397

申请日：2012-08-06

申请人： Paulo G. Normando ,  Carlos I. R. Bandeira ,  Darlan Cavalcante Moreira ,  Walter C. Freitas, Jr. ,  Yuri C. B. Silva

发明人： Paulo G. Normando ,  Carlos I. R. Bandeira ,  Darlan Cavalcante Moreira ,  Walter C. Freitas, Jr. ,  Yuri C. B. Silva

IPC分类号： H04J11/00 ,  H04B7/02 ,  H04B7/04 ,  H04B15/00

CPC分类号： H04J11/0033 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0456 ,  H04B15/00

摘要： In MU-MIMO scenarios, uncoordinated or external interference may be very significant. Such external interference can degrade the system performance as much as the internal interference. To address these problems, a desired signal subspace can be changed to avoid the external interference as much as possible. This technique can be applied in conjunction with systems that already cancel internal interference, such as Interference Alignment and Joint Processing. An original signal space may be broken down to desired and interference subspaces that are orthogonal to each other. The receiver can notify the transmitter of the boundary, and transmitter in turn can project the transmitted signal to fall into the desired subspace. The receiver can project the received signal into the desired subspace, which cancels everything not contained in the desired subspace.

摘要翻译： 在MU-MIMO方案中，不协调或外部干扰可能非常显着。 这种外部干扰可能使系统性能与内部干扰一样多。 为了解决这些问题，可以改变期望的信号子空间，以尽可能地避免外部干扰。 该技术可以与已经消除内部干扰的系统结合使用，例如干扰对准和联合处理。 原始信号空间可以被分解为彼此正交的期望的和干扰的子空间。 接收机可以通知发射机的边界，而发射机又可以将传输的信号投影到所需的子空间中。 接收机可以将接收到的信号投影到所需的子空间中，从而取消所需的子空间中不包含的一切。

公开(公告)号：US20140036790A1

公开(公告)日：2014-02-06

申请号：US13567397

申请日：2012-08-06

申请人： Paulo G. NORMANDO ,  Carlos I.R. Bandeira ,  Darlan Cavalcante Moreira ,  Walter C. Freitas, JR. ,  Yuri C.B. Silva

发明人： Paulo G. NORMANDO ,  Carlos I.R. Bandeira ,  Darlan Cavalcante Moreira ,  Walter C. Freitas, JR. ,  Yuri C.B. Silva

IPC分类号： H04B15/00

CPC分类号： H04J11/0033 ,  H04B7/024 ,  H04B7/0452 ,  H04B7/0456 ,  H04B15/00

摘要： In MU-MIMO scenarios, uncoordinated or external interference may be very significant. Such external interference can degrade the system performance as much as the internal interference. To address these problems, a desired signal subspace can be changed to avoid the external interference as much as possible. This technique can be applied in conjunction with systems that already cancel internal interference, such as Interference Alignment and Joint Processing. An original signal space may be broken down to desired and interference subspaces that are orthogonal to each other. The receiver can notify the transmitter of the boundary, and transmitter in turn can project the transmitted signal to fall into the desired subspace. The receiver can project the received signal into the desired subspace, which cancels everything not contained in the desired subspace.

摘要翻译： 在MU-MIMO方案中，不协调或外部干扰可能非常显着。 这种外部干扰可能使系统性能与内部干扰一样多。 为了解决这些问题，可以改变期望的信号子空间，以尽可能地避免外部干扰。 该技术可以与已经消除内部干扰的系统结合使用，例如干扰对准和联合处理。 原始信号空间可以被分解为彼此正交的期望的和干扰的子空间。 接收机可以通知发射机的边界，而发射机又可以将传输的信号投影到所需的子空间中。 接收机可以将接收到的信号投影到所需的子空间中，从而取消所需的子空间中不包含的一切。

公开(公告)号：US08054869B2

公开(公告)日：2011-11-08

申请号：US12174829

申请日：2008-07-17

申请人： Ari Kangas ,  Markus Ringström ,  Darlan Cavalcante Moreira

发明人： Ari Kangas ,  Markus Ringström ,  Darlan Cavalcante Moreira

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04L1/0036 ,  H04B7/0413 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0224

摘要： A downlink Channel Quality Indicator (CQI) is estimated in two steps. Initially, one or more subsets of received reference symbols are selected. If the transmitter may transmit signals in one or more of two or more frequency bands, optimal frequency bands are selected based on a first subset of reference symbols. If the transmitter may transmit using one of two or more VACs, an optimal VAC is selected based on the first or a second subset of reference symbols. An SINR is subsequently calculated for the selected frequency band and VAC combination, based on more than the subset(s) of reference symbols.

摘要翻译： 在两个步骤中估计下行链路信道质量指示符（CQI）。 首先，选择接收到的参考符号的一个或多个子集。 如果发射机可以在两个或更多个频带中的一个或多个频带中发送信号，则基于参考符号的第一子集来选择最佳频带。 如果发射机可以使用两个或更多个VAC中的一个发射，则基于参考符号的第一或第二子集选择最佳VAC。 基于多于参考符号的子集，随后针对所选择的频带和VAC组合计算SINR。

公开(公告)号：US20090238250A1

公开(公告)日：2009-09-24

申请号：US12174829

申请日：2008-07-17

申请人： Ari Kangas ,  Markus Ringstrom ,  Darlan Cavalcante Moreira

发明人： Ari Kangas ,  Markus Ringstrom ,  Darlan Cavalcante Moreira

IPC分类号： H04B1/38 ,  H04B1/10

CPC分类号： H04L1/0036 ,  H04B7/0413 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/0224

摘要： A downlink Channel Quality Indicator (CQI) is estimated in two steps. Initially, one or more subsets of received reference symbols are selected. If the transmitter may transmit signals in one or more of two or more frequency bands, optimal frequency bands are selected based on a first subset of reference symbols. If the transmitter may transmit using one of two or more VACs, an optimal VAC is selected based on the first or a second subset of reference symbols. An SINR is subsequently calculated for the selected frequency band and VAC combination, based on more than the subset(s) of reference symbols.

摘要翻译： 在两个步骤中估计下行链路信道质量指示符（CQI）。 首先，选择接收到的参考符号的一个或多个子集。 如果发射机可以在两个或更多个频带中的一个或多个频带中传输信号，则基于参考符号的第一子集来选择最佳频带。 如果发射机可以使用两个或更多个VAC中的一个发射，则基于参考符号的第一或第二子集选择最佳VAC。 基于多于参考符号的子集，随后针对所选择的频带和VAC组合计算SINR。