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公开(公告)号：US20120039192A1
公开(公告)日：2012-02-16
申请号：US13146846
申请日：2009-01-28
申请人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota , Fangwei Tong
发明人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota , Fangwei Tong
IPC分类号： H04J1/12
CPC分类号： H04L25/022 , H04L25/03159 , H04L27/2657 , H04L27/2695 , H04L2025/03426
摘要： There is provided a first device for use in a communication system, the communication system further comprising a plurality of second devices, the system having a plurality of orthogonal frequency carriers available for transmissions, each second device having a respective carrier frequency offset estimated from signals received from the first device, each of the second devices transmitting a respective stream of symbols using the respective estimated carrier frequency offset and one or more frequency carriers selected from the plurality of orthogonal frequency carriers, the first device comprising receiver circuitry for receiving respective signals from each of the second devices; a channel estimator for generating, from the received signals, an estimate of the channel over which the signals have been transmitted; an interference estimator for generating, from the received signals, an estimate of interference at the first device caused by errors in the carrier frequency offsets estimated by each second device; and circuitry for equalising the received signals using the estimate of the channel and the estimate of the interference.
摘要翻译： 提供了一种在通信系统中使用的第一设备，所述通信系统还包括多个第二设备，所述系统具有可用于传输的多个正交频率载波，每个第二设备具有从接收到的信号估计的相应的载波频率偏移 从第一设备，每个第二设备使用相应的估计的载波频率偏移和从多个正交频率载波中选择的一个或多个频率载波来发送相应的符号流，第一设备包括接收机电路，用于从每个 的第二设备; 信道估计器，用于从所接收的信号中产生已经发送信号的信道的估计; 干扰估计器，用于从接收到的信号中产生由由每个第二设备估计的载波频率偏移中的误差引起的在第一设备处的干扰的估计; 以及用于使用信道的估计和干扰估计来均衡接收信号的电路。
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公开(公告)号：US08023523B2
公开(公告)日：2011-09-20
申请号：US11817007
申请日：2005-02-25
申请人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
发明人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
CPC分类号： H04L5/0085 , H04L5/0023 , H04L5/0037 , H04L5/006
摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.
摘要翻译： 在多用户通信系统中，使用每个子信道的质量测量将副载波分配给子信道。 将初始子载波分配给每个子信道，并测量质量度量。 依赖于每个子信道的质量测量来分配随后的子载波。 具有最低质量测量的子信道接收第一分配，并且具有最高质量测量的子信道接收最后的分配。 在对子信道质量测量进行重新排序之后，直到所有副载波被分配为止重复后续分配。
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公开(公告)号：US20090207829A1
公开(公告)日：2009-08-20
申请号：US11817007
申请日：2005-02-25
申请人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
发明人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
CPC分类号： H04L5/0085 , H04L5/0023 , H04L5/0037 , H04L5/006
摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.
摘要翻译： 在多用户通信系统中，使用每个子信道的质量测量将副载波分配给子信道。 将初始子载波分配给每个子信道，并测量质量度量。 依赖于每个子信道的质量测量来分配随后的子载波。 具有最低质量测量的子信道接收第一分配，并且具有最高质量测量的子信道接收最后的分配。 在对子信道质量测量进行重新排序之后，直到所有副载波被分配为止重复后续分配。
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公开(公告)号：US20090034456A1
公开(公告)日：2009-02-05
申请号：US11817001
申请日：2005-02-25
申请人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
发明人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
CPC分类号： H04L5/0085 , H04B1/715 , H04B2001/7154 , H04L5/0023 , H04L5/0037 , H04L5/006
摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.
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公开(公告)号：US08306131B2
公开(公告)日：2012-11-06
申请号：US11817001
申请日：2005-02-25
申请人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
发明人： Ying Peng , Simon Armour , Joe McGeehan , Tomoyoshi Yokota
IPC分类号： H04K1/10
CPC分类号： H04L5/0085 , H04B1/715 , H04B2001/7154 , H04L5/0023 , H04L5/0037 , H04L5/006
摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.
摘要翻译： 在多用户通信系统中，使用每个子信道的质量测量将副载波分配给子信道。 将初始子载波分配给每个子信道，并测量质量度量。 依赖于每个子信道的质量测量来分配随后的子载波。 具有最低质量测量的子信道接收第一分配，并且具有最高质量测量的子信道接收最后的分配。 在对子信道质量测量进行重新排序之后，直到所有副载波被分配为止重复后续分配。
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公开(公告)号：US20110286559A1
公开(公告)日：2011-11-24
申请号：US13146818
申请日：2009-01-28
申请人： Ying Peng , Simon Armour , Joe Mcgeehan , Tomoyoshi Yokota , Fangwei Tong
发明人： Ying Peng , Simon Armour , Joe Mcgeehan , Tomoyoshi Yokota , Fangwei Tong
IPC分类号： H04L25/08
CPC分类号： H04L27/2657 , H04L25/022 , H04L25/03159 , H04L27/2695 , H04L2025/03426
摘要： There is provided a first device for use in a communication system, the communication system further comprising a plurality of second devices divided into a plurality of groups, the system having a plurality of orthogonal frequency carriers available for transmissions, each second device having a respective carrier frequency offset estimated from signals received from the first device, each of the second devices transmitting a respective stream of symbols using the respective estimated carrier frequency offset and one or more frequency carriers selected from the plurality of orthogonal frequency carriers, the first device comprising receiver circuitry for receiving respective signals from each of the second devices; a channel estimator for generating, from the received signals, an estimate of the channel over which the signals have been transmitted; an interference estimator for generating, from the received signals, an estimate of interference at the first device caused by errors in the carrier frequency offsets estimated by each second device; first circuitry for cancelling interference in the signals received at the first device using the estimate of the interference, the circuitry being configured to cancel interference between second devices within a first one of the plurality of groups; second circuitry for equalising the signals output from the first circuitry using the estimate of the channel; and third circuitry for cancelling interference in the signals output from the second circuitry, the third circuitry being configured to cancel the interference between second devices in a second one of the plurality of groups.
摘要翻译： 提供了一种在通信系统中使用的第一设备，所述通信系统还包括划分成多个组的多个第二设备，所述系统具有可用于传输的多个正交频率载波，每个第二设备具有相应的载波 从所述第一设备接收的信号估计的频率偏移，所述第二设备中的每一个使用相应的估计载波频率偏移和从所述多个正交频率载波中选择的一个或多个频率载波来传送相应的符号流，所述第一设备包括接收机电路 用于从每个第二设备接收相应的信号; 信道估计器，用于从所接收的信号中产生已经发送信号的信道的估计; 干扰估计器，用于从接收到的信号中产生由由每个第二设备估计的载波频率偏移中的误差引起的在第一设备处的干扰的估计; 第一电路，用于使用所述干扰的估计来消除在所述第一设备处接收的信号的干扰，所述电路被配置为消除所述多个组中的第一组内的第二设备之间的干扰; 第二电路，用于使用所述信道的估计来均衡从所述第一电路输出的信号; 以及用于消除从第二电路输出的信号的干扰的第三电路，所述第三电路被配置为消除所述多个组中的第二组中的第二设备之间的干扰。
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公开(公告)号：US07680199B2
公开(公告)日：2010-03-16
申请号：US11193045
申请日：2005-07-29
申请人： Simon Armour , Angela Doufexi , Joseph Mc Geertvaw
发明人： Simon Armour , Angela Doufexi , Joseph Mc Geertvaw
IPC分类号： H04K1/10
CPC分类号： H04L5/006 , H04L5/0007 , H04W72/08
摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.
摘要翻译： 在多用户通信系统中，使用每个子信道的质量测量将副载波分配给子信道。 将初始子载波分配给每个子信道，并测量质量度量。 依赖于每个子信道的质量测量来分配随后的子载波。 具有最低质量测量的子信道接收第一分配，并且具有最高质量测量的子信道接收最后的分配。 在对子信道质量测量进行重新排序之后，直到所有副载波被分配为止重复后续分配。
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公开(公告)号：US20070036123A1
公开(公告)日：2007-02-15
申请号：US11414382
申请日：2006-05-01
IPC分类号： H04B7/208
CPC分类号： H04W16/30 , H04B7/2606 , H04L5/0007 , H04W16/26 , H04W72/082 , H04W88/04
摘要： A communication network comprises at least a first region serviced by a base station. This region also comprises a plurality of bridging stations deployed around the base station, so defining a circumference around it. Each bridging station comprises one or more directional antennas operable to generate a coverage area lying predominantly outside said circumference. The effect is to form, in operation, an outer zone predominantly outside said circumference serviced by said bridging stations, and an inner zone within said circumference serviced by said base station. For communications with the outer zone, said base station is operable to assign duplicate OFDMA sub-channels to mobile stations in respective areas of the outer zone served by bridging stations that experience sufficiently low levels of cross-interference from each other's communications.
摘要翻译： 通信网络至少包括由基站服务的第一区域。 该区域还包括围绕基站部署的多个桥接站，因此限定围绕它的圆周。 每个桥接站包括一个或多个定向天线，其可操作以产生主要位于所述圆周外的覆盖区域。 效果是在操作中形成主要在由所述桥接站服务的所述圆周外部的外部区域以及由所述基站服务的所述圆周内的内部区域。 为了与外部区域进行通信，所述基站可操作以将重复的OFDMA子信道分配给由经历来自彼此通信的足够低的交叉干扰水平的桥接站服务的外部区域的相应区域中的移动站。
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公开(公告)号：US06963617B1
公开(公告)日：2005-11-08
申请号：US09913840
申请日：2000-01-24
CPC分类号： H04L27/2647 , H04L25/03057 , H04L2025/03414 , H04L2025/0349 , H04L2025/03617
摘要： An OFDM receiver includes an adaptive equalizer, which acts on a received signal, after conversion to digital samples. After filtering by the equalizer, any guard interval is removed, and a Fast Fourier Transform is applied to the signal. The data signal is then estimated and the estimated data is supplied as an output. The estimated data also has any guard interval reinserted, and is applied to an Inverse Fast Fourier Transform, and is fed back to the equalizer to allow adaptation of the tap coefficients thereof.
摘要翻译： OFDM接收机包括在转换成数字采样之后作用于接收信号的自适应均衡器。 在均衡器滤波之后，去除任何保护间隔，并将快速傅里叶变换应用于信号。 然后估计数据信号，并将估计数据作为输出提供。 估计数据还具有重新插入的任何保护间隔，并且被应用于快速傅里叶逆变换，并被反馈到均衡器以允许其抽头系数的适应。
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公开(公告)号：US20120027105A1
公开(公告)日：2012-02-02
申请号：US13147067
申请日：2010-09-24
申请人： Andrew Nix , Simon Armour , Gillian Huang
发明人： Andrew Nix , Simon Armour , Gillian Huang
IPC分类号： H04L27/00
摘要： There is provided a channel estimator for a receiver in a communication system, the channel estimator comprising an input for receiving signals that have been transmitted over a transmission channel; processing means for determining an initial estimate of the channel impulse response of the transmission channel from the received signals, the determined initial estimate comprising a plurality of taps; and determining a further estimate of the transmission channel from the initial estimate; wherein the processing means is configured to apply a weighting to a subset of the plurality of taps from the initial estimate in determining the further estimate, the value of the weighting being determined according to a quality of the received signals.
摘要翻译： 提供了一种用于通信系统中的接收机的信道估计器，信道估计器包括用于接收通过传输信道发送的信号的输入; 处理装置，用于从接收到的信号确定传输信道的信道脉冲响应的初始估计，所确定的初始估计包括多个抽头; 以及从所述初始估计确定所述传输信道的进一步估计; 其中所述处理装置被配置为在确定所述另外的估计时，从所述初始估计中对所述多个抽头的子集应用加权，所述加权的值根据所接收的信号的质量来确定。
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