公开(公告)号：US08271013B2

公开(公告)日：2012-09-18

申请号：US12443764

申请日：2007-10-31

申请人： Mats Sägfors ,  Stefan Wager ,  Janne Peisa ,  Johan Torsner ,  Muhammad Kazmi ,  Afif Osseiran

发明人： Mats Sägfors ,  Stefan Wager ,  Janne Peisa ,  Johan Torsner ,  Muhammad Kazmi ,  Afif Osseiran

IPC分类号： H04B7/00 ,  H04B7/185

CPC分类号： H04L1/0029 ,  H04L1/0015 ,  H04L1/0027 ,  H04L2001/0093 ,  H04W52/143 ,  H04W52/247 ,  H04W52/322 ,  H04W72/085 ,  H04W72/087

摘要： A method for transmitting data flows between a network element and a number of receivers over a first channel. The method comprises the steps of: performing a link adaptation for the transmission of a data flow by said network element, and transmitting the data flow, transmitting an indication of a channel quality required for reception of the data flow on a second channel, receiving by said receivers said indication of channel quality, measuring a link quality by said receivers by monitoring a pilot channel, comparing said measured link quality with said received indication of the channel quality, and transmitting to said network element result of said comparison of said measured link quality with said received indication of the channel quality, if said result is lower than a predetermined value. The invention also relates to a network element and a user equipment.

摘要翻译： 一种用于在第一通道上在网络元件和多个接收器之间传送数据流的方法。 该方法包括以下步骤：对由所述网元发送数据流进行链路自适应，并发送数据流，在第二信道上发送接收数据流所需的信道质量的指示， 所述接收机表示信道质量，通过监视导频信道来测量所述接收机的链路质量，将所测量的链路质量与所述接收的信道质量指示进行比较，并将所述测量链路质量的所述比较结果发送到所述网络单元 如果所述结果低于预定值，则所述接收到的信道质量指示。 本发明还涉及网元和用户设备。

公开(公告)号：US20090323541A1

公开(公告)日：2009-12-31

申请号：US12443764

申请日：2007-10-31

申请人： Mats Sägfors ,  Stefan Wager ,  Janne Peisa ,  Johan Torsner ,  Muhammad Kazmi ,  Afif Osseiran

发明人： Mats Sägfors ,  Stefan Wager ,  Janne Peisa ,  Johan Torsner ,  Muhammad Kazmi ,  Afif Osseiran

IPC分类号： H04L12/26 ,  H04W72/08

CPC分类号： H04L1/0029 ,  H04L1/0015 ,  H04L1/0027 ,  H04L2001/0093 ,  H04W52/143 ,  H04W52/247 ,  H04W52/322 ,  H04W72/085 ,  H04W72/087

摘要： A method for transmitting data flows between a network element and a number of receivers over a first channel. The method comprises the steps of: performing a link adaptation for the transmission of a data flow by said network element, and transmitting the data flow, transmitting an indication of a channel quality required for reception of the data flow on a second channel, receiving by said receivers said indication of channel quality, measuring a link quality by said receivers by monitoring a pilot channel, comparing said measured link quality with said received indication of the channel quality, and transmitting to said network element result of said comparison of said measured link quality with said received indication of the channel quality, if said result is lower than a predetermined value. The invention also relates to a network element and a user equipment.

摘要翻译： 一种用于在第一通道上在网络元件和多个接收器之间传送数据流的方法。 该方法包括以下步骤：对由所述网元发送数据流进行链路自适应，并发送数据流，在第二信道上发送接收数据流所需的信道质量的指示， 所述接收机表示信道质量，通过监视导频信道来测量所述接收机的链路质量，将所测量的链路质量与所述接收的信道质量指示进行比较，并将所述测量链路质量的所述比较结果发送到所述网络单元 如果所述结果低于预定值，则所述接收到的信道质量指示。 本发明还涉及网元和用户设备。

公开(公告)号：US08331467B2

公开(公告)日：2012-12-11

申请号：US12461420

申请日：2009-08-11

申请人： Afif Osseiran ,  Andrew Logothetis

发明人： Afif Osseiran ,  Andrew Logothetis

IPC分类号： H04L27/28

CPC分类号： H04L25/0242 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/025

摘要： A radio channel estimation technique is described for use in a OFDM-based radio communications system. A block of OFDM symbols is transmitted from multiple antennas over multiple sub-carrier frequencies. The block of OFDM symbols includes known pilot symbols as well as data symbols to be determined by a receiver. The pilot symbols are transmitted in a predetermined pattern at periodic times on periodic sub-carriers. A pilot channel estimate is determined for each pilot symbol in the received block of OFDM symbols. An N×M matrix of points corresponding to the received OFDM symbol block is formed. N is the number of sub-carriers and M is the number of OFDM symbols in the OFDM symbol block. The matrix is formed by inserting pilot channel estimates at predetermined positions in the N×M matrix according to the predetermined pilot pattern and inserting zeros in remaining positions in the N×M matrix. A two dimensional inverse Fourier transform of the N×M matrix is calculated resulting in multiple copies of a channel estimate in the time domain. One is selected, and a two dimensional Fourier transform of the selected channel estimate is calculated to obtain a channel estimate at each point in the OFDM block.

公开(公告)号：US07848468B2

公开(公告)日：2010-12-07

申请号：US11743332

申请日：2007-05-02

申请人： Jiann-Ching Guey ,  Afif Osseiran

发明人： Jiann-Ching Guey ,  Afif Osseiran

IPC分类号： H03D1/04

CPC分类号： H04L5/0007 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0064 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/025 ,  H04L27/2613

摘要： According to one embodiment, a wireless communication device estimates channel response based on a reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols when the reduced-density common pilot signal is sufficient for estimating the channel response with a desired accuracy. The wireless communication device estimates the channel response based on the reduced-density common pilot signal and one or more additional pilot symbols adaptively allocated to the wireless communication device when the reduced-density common pilot signal is insufficient for estimating the channel response with the desired accuracy.

摘要翻译： 根据一个实施例，当减密密度公共导频信号足以以期望的精度估计信道响应时，无线通信设备基于包括多个规则间隔的公共导频符号的简化密度公共导频信号来估计信道响应。 当减密密度公共导频信号不足以估计具有所需精度的信道响应时，无线通信设备基于减小密度公共导频信号和自适应分配给无线通信设备的一个或多个附加导频符号来估计信道响应 。

公开(公告)号：US09425885B2

公开(公告)日：2016-08-23

申请号：US12937034

申请日：2008-04-11

申请人： Slimane Ben Slimane ,  Jawad Manssour ,  Afif Osseiran

发明人： Slimane Ben Slimane ,  Jawad Manssour ,  Afif Osseiran

IPC分类号： H04L12/26 ,  H04B7/14 ,  H04W4/00 ,  H04B7/155 ,  H04L1/00

CPC分类号： H04B7/15521 ,  H04L1/0001 ,  H04L1/0026 ,  H04L2001/0097

摘要： A data communication involves selecting a group (15) of M multiple source nodes (12, 16) among N multiple source nodes (10, 12, 14, 16) present in a communication system (1) and having data destined for a destination node (30), where 2≦M

摘要翻译： 数据通信涉及在存在于通信系统（1）中的N个多个源节点（10,12,14,16）中选择M个多个源节点（12,16）的组（15），并且具有去往目的地节点 （30），其中2≤M

公开(公告)号：US09179390B2

公开(公告)日：2015-11-03

申请号：US12919639

申请日：2009-01-21

申请人： Qingyu Miao ,  Jiansong Gan ,  Rong Hu ,  Afif Osseiran ,  Zhang Zhang

发明人： Qingyu Miao ,  Jiansong Gan ,  Rong Hu ,  Afif Osseiran ,  Zhang Zhang

IPC分类号： H04L12/28 ,  H04W40/02 ,  H04L12/707

CPC分类号： H04W40/02 ,  H04L45/125 ,  H04L45/22

摘要： A communication unit for use in a wireless communication system in which a transmitting unit is arranged for wireless communication with at least one receiving unit, said network further comprising at least a first and a second relay node arranged to receive a signal from the transmitting unit and forward it to the receiving unit, said node being characterized in that it comprises a processor arranged to perform the following steps: identifying at least a first and a second communication path between the transmitting unit and the receiving unit, at least one of said paths involving the first or the second relay node, calculating a first and a second capacity of at least one hop in the first and second communication path, respectively communicating information related to the first and second capacity to at least one other communication node in the wireless network.

摘要翻译： 一种在无线通信系统中使用的通信单元，其中发送单元被布置用于与至少一个接收单元的无线通信，所述网络还包括至少第一和第二中继节点，被布置为从所述发送单元接收信号， 所述节点的特征在于，其包括被配置为执行以下步骤的处理器：识别所述发送单元和所述接收单元之间的至少第一和第二通信路径，所述至少一个所述路径涉及 第一或第二中继节点，计算第一和第二通信路径中的至少一跳的第一和第二容量，分别将与第一和第二容量相关的信息传送到无线网络中的至少一个其他通信节点。

公开(公告)号：US20050064872A1

公开(公告)日：2005-03-24

申请号：US10668363

申请日：2003-09-24

申请人： Afif Osseiran ,  Andrew Logothetis ,  Marten Ericson

发明人： Afif Osseiran ,  Andrew Logothetis ,  Marten Ericson

IPC分类号： H04B7/04 ,  H04B7/06 ,  H04L12/56 ,  H04W16/28 ,  H04W72/08 ,  H04W72/12 ,  H04Q7/20

CPC分类号： H04W72/1231 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0619 ,  H04W16/28

摘要： A radio base station includes multiple antennas associated with a cell. Multiple mobile radios are selected to receive transmissions over a shared radio channel during a predetermined time interval. Information is transmitted over the shared radio channel to multiple mobile radios in the cell during the predetermined time interval using multiple antenna beams. As a result, interference from the transmission appears as white additive Gaussian noise in time and in space in the cell. A “flashlight effect” caused by a single beam transmission over the shared channel during a predetermined time interval that would normally detrimentally impact mobile channel quality detection is avoided. Other methods for avoiding the flashlight effect are described.

摘要翻译： 无线电基站包括与小区相关联的多个天线。 多个移动无线电被选择以在预定的时间间隔期间通过共享无线电信道接收传输。 信息通过共享无线电信道在预定时间间隔内使用多个天线波束在小区中的多个移动无线电发射。 结果，来自传输的干扰在时间和空间中表现为白色加性高斯噪声。 避免了在通常不利地影响移动信道质量检测的预定时间间隔期间通过共享信道上的单个波束传输引起的“手电筒效应”。 描述了避免手电筒效应的其他方法。

公开(公告)号：US08081721B2

公开(公告)日：2011-12-20

申请号：US11730003

申请日：2007-03-29

申请人： Afif Osseiran ,  Andrew Logothetis

发明人： Afif Osseiran ,  Andrew Logothetis

IPC分类号： H04B7/10

CPC分类号： H04B7/208 ,  H04B7/026 ,  H04L5/0023 ,  H04L27/2607 ,  H04L27/2628 ,  H04L27/265

摘要： A wireless communication system uses relaying to enhance performance. Artificial frequency selectivity and spatial diversity are provided by introducing delay diversity. A transformed OFDM chunk is subjected to a 2D cyclic prefix by pre-appending to a representation of the chunk the last column of the representation and by copying a number of the last rows of the pre-appended chunk to the top of the representation thereby forming an augmented OFDM chunk.

摘要翻译： 无线通信系统使用中继来提高性能。 通过引入延迟分集来提供人工频率选择性和空间分集。 通过预先附加到组块表示的最后一列并通过将预先附加的组块的最后一行的数目复制到表示的顶部，将变换的OFDM组块经受2D循环前缀，从而形成 增强的OFDM块。

公开(公告)号：US07437166B2

公开(公告)日：2008-10-14

申请号：US10668363

申请日：2003-09-24

申请人： Afif Osseiran ,  Andrew Logothetis ,  Marten Ericson

发明人： Afif Osseiran ,  Andrew Logothetis ,  Marten Ericson

IPC分类号： H04Q7/20

CPC分类号： H04W72/1231 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0619 ,  H04W16/28

摘要： A radio base station includes multiple antennas associated with a cell. Multiple mobile radios are selected to receive transmissions over a shared radio channel during a predetermined time interval. Information is transmitted over the shared radio channel to multiple mobile radios in the cell during the predetermined time interval using multiple antenna beams. As a result, interference from the transmission appears as white additive Gaussian noise in time and in space in the cell. A “flashlight effect” caused by a single beam transmission over the shared channel during a predetermined time interval that would normally detrimentally impact mobile channel quality detection is avoided. Other methods for avoiding the flashlight effect are described.

摘要翻译： 无线电基站包括与小区相关联的多个天线。 多个移动无线电被选择以在预定的时间间隔期间通过共享无线电信道接收传输。 信息通过共享无线电信道在预定时间间隔内使用多个天线波束在小区中的多个移动无线电发射。 结果，来自传输的干扰在时间和空间中表现为白色加性高斯噪声。 避免了在通常不利地影响移动信道质量检测的预定时间间隔期间通过共享信道上的单个波束传输引起的“手电筒效应”。 描述了避免手电筒效应的其他方法。

公开(公告)号：US20060280114A1

公开(公告)日：2006-12-14

申请号：US11418455

申请日：2006-05-05

申请人： Afif Osseiran ,  Andrew Logothetis

发明人： Afif Osseiran ,  Andrew Logothetis

IPC分类号： H04J11/00

CPC分类号： H04L25/0242 ,  H04L1/0625 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0232 ,  H04L25/025

摘要： A radio channel estimation technique is described for use in a OFDM-based radio communications system. A block of OFDM symbols is transmitted from multiple antennas over multiple sub-carrier frequencies. The block of OFDM symbols includes known pilot symbols as well as data symbols to be determined by a receiver. The pilot symbols are transmitted in a predetermined pattern at periodic times on periodic sub-carriers. A pilot channel estimate is determined for each pilot symbol in the received block of OFDM symbols. An N×M matrix of points corresponding to the received OFDM symbol block is formed. N is the number of sub-carriers and M is the number of OFDM symbols in the OFDM symbol block. The matrix is formed by inserting pilot channel estimates at predetermined positions in the N×M matrix according to the predetermined pilot pattern and inserting zeros in remaining positions in the N×M matrix. A two dimensional inverse Fourier transform of the N×M matrix is calculated resulting in multiple copies of a channel estimate in the time domain. One is selected, and a two dimensional Fourier transform of the selected channel estimate is calculated to obtain a channel estimate at each point in the OFDM block.

摘要翻译： 描述了用于基于OFDM的无线电通信系统中的无线电信道估计技术。 OFDM符号块通过多个子载波频率从多个天线发送。 OFDM符号的块包括已知的导频符号以及由接收机确定的数据符号。 在周期性子载波上周期性地以预定模式发送导频符号。 对OFDM符号的接收块中的每个导频符号确定导频信道估计。 形成与接收的OFDM符号块相对应的点的 Nx M个矩阵。 N 是子载波的数量，并且 M 是OFDM符号块中的OFDM符号的数量。 通过根据预定导频模式在 NxM 矩阵中的预定位置处插入导频信道估计并将零插入到 NxM 矩阵中的剩余位置中来形成矩阵。 计算 NxM 矩阵的二维傅里叶逆变换，得到时域中的信道估计的多个拷贝。 选择一个，并且计算所选择的信道估计的二维傅里叶变换，以在OFDM块中的每个点处获得信道估计。