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公开(公告)号：EP3512219A1
公开(公告)日：2019-07-17
申请号：EP19160934.6
申请日：2010-03-14
IPC分类号： H04W4/00 , H04B7/0417 , H04B7/06 , H04B7/0452
摘要： A method for signal processing in a receiver (28A) includes receiving in the receiver a Multi-User Multiple-Input Multiple-Output (MU-MIMO) signal. The MU-MIMO signal includes at least a first signal, which is precoded using a first precoding scheme and is addressed to the receiver, and a second signal, which is preceded using a second precoding scheme. An average error rate achievable in decoding the first signal in the presence of the second signal is computed. The average error rate is computed over a set of possible choices of the second precoding scheme. The first precoding scheme is selected from among a plurality of available precoding schemes so as to satisfy a criterion defined over the average error rate. The receiver sends feedback to a transmitter (24) transmitting the first signal. The feedback depends on the selected first precoding scheme and causes the transmitter to control transmission of the first signal.
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公开(公告)号：EP2692068B1
公开(公告)日：2019-06-19
申请号：EP12765629.6
申请日：2012-03-29
IPC分类号： H04B7/024 , H04B7/06 , H04B7/0417 , H04W52/40
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公开(公告)号：EP2374252B1
公开(公告)日：2018-03-28
申请号：EP09837397.0
申请日：2009-06-25
CPC分类号： H04B7/0473 , H04L1/0009 , H04L1/0656 , H04L1/0675 , H04L5/0025
摘要： A method for communication includes, in a transmitter having a first number of transmit antenna ports, setting an upper limit on a second number of spatial layers to be used by the transmitter to be less than the first number. An actual number of the spatial layers, which does not exceed the upper limit, is allocated for transmission to a given receiver. One or more streams of modulated symbols are mapped onto the allocated actual number of the spatial layers. The actual number of the spatial layers are transmitted from the transmitter to the given receiver. A precoding operation maps the spatial layers onto the transmit antenna ports. A first upper limit is set when the precoding operation depends on feedback from the given receiver. A second upper limit, which does not exceed the first upper limit, is set when the precoding operation is not dependent on the feedback.
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公开(公告)号：EP2850742A1
公开(公告)日：2015-03-25
申请号：EP13728867.6
申请日：2013-05-17
CPC分类号： H04W24/08 , H04B7/024 , H04B7/0632 , H04L1/0026 , H04L1/20 , H04W24/10 , H04W72/08
摘要： An interference covariance calculation technique is selected at a first communication device, where the interference covariance calculation technique is to be utilized by a second communication device when computing a channel quality indicator (CQI) associated with a communication channel between the first communication device and the second communication device. The interference covariance calculation technique is selected from a set of multiple techniques for calculating interference covariance. The first communication device transmits an indication of the selected interference covariance calculation technique to the second communication device. The first communication device receives a CQI calculated by the second communication device in accordance with the selected interference covariance calculation technique.
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公开(公告)号：EP2692068A1
公开(公告)日：2014-02-05
申请号：EP12765629.6
申请日：2012-03-29
IPC分类号： H04B7/02
CPC分类号： H04B7/0626 , H04B7/024 , H04B7/0417 , H04B7/0623 , H04W52/40
摘要： A method includes receiving in a mobile communication terminal (24) downlink signals from at least first and second cells (28) that coordinate transmission of the downlink signals with one another. Channel feedback is calculated in the terminal based on the received downlink signals. The channel feedback is configured to cause the first cell to precode subsequent downlink signals in response to the channel feedback with a first precoding vector, and to cause the second cell to precode the subsequent downlink signals in response to the channel feedback with a second precoding vector that differs in magnitude from the first precoding vector. The channel feedback is transmitted from the terminal.
摘要翻译： 一种方法包括在移动通信终端（24）中接收来自协调下行链路信号彼此的传输的至少第一和第二小区（28）的下行链路信号。 基于接收到的下行链路信号在终端中计算信道反馈。 信道反馈被配置为使第一小区响应于使用第一预编码向量的信道反馈来预编码后续下行链路信号，并且使第二小区响应于使用第二预编码向量的信道反馈来预编码后续下行链路信号 其幅度与第一预编码向量不同。 信道反馈从终端传输。
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公开(公告)号：EP2417780B1
公开(公告)日：2019-05-08
申请号：EP10761252.5
申请日：2010-03-14
IPC分类号： H04B7/0417 , H04B7/0452 , H04B7/06
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7.发明授权
公开(公告)号：EP2842361B1
公开(公告)日：2019-03-27
申请号：EP13782124.5
申请日：2013-04-14
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8.发明公开METHOD AND SYSTEM FOR REPORTING FEEDBACK IN COOPERATIVE MULTIPOINT TRANSMISSION 审中-公开方法及系统协作多点传输的反馈消息
公开(公告)号：EP2847937A2
公开(公告)日：2015-03-18
申请号：EP13787645.4
申请日：2013-05-07
IPC分类号： H04L12/26
CPC分类号： H04W24/10 , H04B7/024 , H04B7/0413 , H04B7/063 , H04B7/0639 , H04W72/085
摘要： A method includes receiving, in a communication terminal (24), signals from a group of cells (28). The group of cells cooperates in a Coordinated Multipoint (CoMP) transmission scheme that assigns multiple Channel State Information Reference Signals (CSI-RS) resources to the cells. A first subset of the CSI-RS resources is assigned to periodically report channel feedback on a first uplink channel, and a second subset of the CSI-RS resources is assigned to a-periodically report the channel feedback on a second uplink channel. The channel feedback is computed for the multiple CSI-RS resources. The channel feedback computed for the CSI- RS resources is transmitted in the first subset on the first uplink channel, and the channel feedback computed for the CSI-RS resources in the second subset is transmitted on the second uplink channel.
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9.发明公开
公开(公告)号：EP2417780A1
公开(公告)日：2012-02-15
申请号：EP10761252.5
申请日：2010-03-14
IPC分类号： H04W4/00
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0632
摘要： A method for signal processing in a receiver includes receiving in the receiver a Multi-User Multiple-Input Multiple-Output (MU-MIMO) signal. The MU-MIMO signal includes at least a first signal, which is precoded using a first precoding scheme and is addressed to the receiver, and a second signal, which is precoded using a second precoding scheme. An average error rate achievable in decoding the first signal in the presence of the second signal is computed. The average error rate is computed over a set of possible choices of the second precoding scheme. The first precoding scheme is selected from among a plurality of available precoding schemes so as to satisfy a criterion defined over the average error rate. The receiver sends feedback to a transmitter transmitting the first signal. The feedback depends on the selected first precoding scheme and causes the transmitter to control transmission of the first signal.
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10.发明公开COORDINATED MULTIPOINT (COMP) COMMUNICATION BETWEEN BASE-STATIONS AND MOBILE COMMUNICATION TERMINALS 审中-公开协作多点（COMP）BETWEEN基站和移动通信终端的通信
公开(公告)号：EP2842361A1
公开(公告)日：2015-03-04
申请号：EP13782124.5
申请日：2013-04-14
IPC分类号： H04W24/00
CPC分类号： H04W24/00 , H04B7/024 , H04B7/0619 , H04B17/24 , H04B17/309 , H04L1/0026 , H04L1/0029 , H04L1/0077 , H04L1/06 , H04L25/0224 , H04W72/042
摘要： A method includes receiving, at a communication terminal (24), signals from a group of cells (28) that cooperate in a Coordinated Multipoint (Co MP) transmission scheme. Signaling (64) that specifies a Co MP resource management (CRM) set is received at the communication terminal. The CRM set includes a subset of the cells in the group for which the communication terminal is to perform signal measurements. A size of the CRM set is restricted to a predefined maximum size. The signal measurements are performed at the communication terminal only on the signals received from one or more of the cells in the CRM set. The signal measurements performed on the one or more of the cells in the CRM set are reported from the communication terminal.
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