公开(公告)号：US20110064006A1

公开(公告)日：2011-03-17

申请号：US12992322

申请日：2008-07-04

申请人： Jiansong Gan ,  Peter Larsson ,  Qingyu Miao

发明人： Jiansong Gan ,  Peter Larsson ,  Qingyu Miao

IPC分类号： H04B7/14

CPC分类号： H04L1/0001 ,  H04L25/0202 ,  H04L25/03343 ,  H04L2001/0097

摘要： A method is performed by an intermediate device in a wireless network. The method includes estimating a first hop channel state based on a transmission originating from a first device. The method further includes estimating an end-to-end signal-to-noise ratio base on a transmission associated with a second device. The method also includes adapting a filter or an amplifier of the intermediate device based on the first hop channel state and the end-to-end signal-to-noise ratio.

摘要翻译： 一种方法由无线网络中的中间设备执行。 该方法包括基于源自第一设备的传输来估计第一跳信道状态。 该方法还包括基于与第二设备相关联的传输来估计端对端信噪比。 该方法还包括基于第一跳信道状态和端对端信噪比来适配中间设备的滤波器或放大器。

公开(公告)号：US08599952B2

公开(公告)日：2013-12-03

申请号：US13120010

申请日：2008-09-24

申请人： Peter Larsson ,  Jiansong Gan ,  Qingyu Miao

发明人： Peter Larsson ,  Jiansong Gan ,  Qingyu Miao

IPC分类号： H04B7/02

CPC分类号： H04B7/022 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0658 ,  H04B17/318

摘要： Uplink overhead is significantly reduced in a MU-COMP wireless communication network by exploiting the dissimilarity of received signal strength in signals transmitted by geographically distributed transmit antennas, as seen by receiving UEs. Each UE calculates a quantized normalization measure of channel elements for a channel weakly received from a first transmitter to that for a channel strongly received from a second transmitter. The quantized normalization measure may be modeled as a ratio of complex Gaussian variables, and quantized in phase and amplitude by making simplifying assumptions. The ratios are quantized, and transmitted to the network using far fewer bits than would be required to transmit the full channel state information. The network uses the quantized normalization measures to set the transmitter weights.

摘要翻译： MU-COMP无线通信网络中的上行链路开销明显减少，这是通过接收UE所看到的，利用地理分布式发射天线发射的信号中接收信号强度的不相似性。 每个UE计算对于从第一发射机弱接收的信道的信道单元的量化归一化度量，以及对于从第二发射机强烈接收的信道。 量化归一化测量可以通过简化假设来建模为复数高斯变量的比率，并以相位和幅度量化。 这些比率被量化，并且使用比传输全通道状态信息所需的位少得多的比特来传送到网络。 网络使用量化的归一化度量来设置发射机的权重。

公开(公告)号：US20110230224A1

公开(公告)日：2011-09-22

申请号：US13120152

申请日：2008-09-24

申请人： Peter Larsson ,  Qingyu Miao ,  Jiansong Gan

发明人： Peter Larsson ,  Qingyu Miao ,  Jiansong Gan

IPC分类号： H04W72/08

CPC分类号： H04W72/082 ,  H04W4/08 ,  H04W8/24 ,  H04W48/08 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/06

摘要： User grouping is employed to tradeoff the COMP forward link capacity and required reverse link feedback, which makes the design of COMP practical and flexible. A channel element, such as the large scale fading, is measured for each distributed transmitter and UE pair based on reference signals, and the network receives this information as feedback in the reverse link. The COMP determines a maximum cross interference level αreq that is affordable, based on the available reverse link capacity for feedback. If this maximum cross interference level αreq is exceeded, geographically separate UEs are divided into as few groups as possible, with UEs within each group separated, and the groups are allocated different time/frequency resource blocks. The grouping is done with the constraint that the cross interference does not exceed αreq.

摘要翻译： 用户分组用于权衡COMP前向链路容量和所需的反向链路反馈，这使得COMP的设计实用性和灵活性。 基于参考信号为每个分布式发射机和UE对测量诸如大规模衰落的信道元素，并且网络将该信息作为反向链路中的反馈接收。 COMP基于可用的反向链路容量来确定可承受的最大交叉干扰水平αreq。 如果超过这个最大交叉干扰水平αreq，则将地理上分离的UE划分成尽可能少的组，每个组中的UE分离，并且分配不同的时间/频率资源块。 分组完成的交叉干扰不超过αreq的约束。

公开(公告)号：US08559992B2

公开(公告)日：2013-10-15

申请号：US13120152

申请日：2008-09-24

申请人： Peter Larsson ,  Qingyu Miao ,  Jiansong Gan

发明人： Peter Larsson ,  Qingyu Miao ,  Jiansong Gan

IPC分类号： H04B15/00

CPC分类号： H04W72/082 ,  H04W4/08 ,  H04W8/24 ,  H04W48/08 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/06

摘要： User grouping is employed to tradeoff the COMP forward link capacity and required reverse link feedback, which makes the design of COMP practical and flexible. A channel element, such as the large scale fading, is measured for each distributed transmitter and UE pair based on reference signals, and the network receives this information as feedback in the reverse link. The COMP determines a maximum cross interference level αreq that is affordable, based on the available reverse link capacity for feedback. If this maximum cross interference level αreq is exceeded, geographically separate UEs are divided into as few groups as possible, with UEs within each group separated, and the groups are allocated different time/frequency resource blocks. The grouping is done with the constraint that the cross interference does not exceed αreq.

摘要翻译： 用户分组用于权衡COMP前向链路容量和所需的反向链路反馈，这使得COMP的设计实用性和灵活性。 基于参考信号为每个分布式发射机和UE对测量诸如大规模衰落的信道元素，并且网络将该信息作为反向链路中的反馈接收。 COMP基于可用的反向链路容量进行反馈，确定了可承受的最大交叉干扰水平alphareq。 如果超过这个最大交叉干扰水平αphareq，则将地理上分离的UE划分成尽可能少的组，每个组中的UE分离，并且分配不同的时间/频率资源块。 分组完成的交叉干扰不超过alphareq的约束。

公开(公告)号：US08570889B2

公开(公告)日：2013-10-29

申请号：US12992322

申请日：2008-07-04

申请人： Jiansong Gan ,  Peter Larsson ,  Qingyu Miao

发明人： Jiansong Gan ,  Peter Larsson ,  Qingyu Miao

IPC分类号： H04J1/16 ,  H04B7/208

CPC分类号： H04L1/0001 ,  H04L25/0202 ,  H04L25/03343 ,  H04L2001/0097

摘要： A method is performed by an intermediate device in a wireless network. The method includes estimating a first hop channel state based on a transmission originating from a first device. The method further includes estimating an end-to-end signal-to-noise ratio base on a transmission associated with a second device. The method also includes adapting a filter or an amplifier of the intermediate device based on the first hop channel state and the end-to-end signal-to-noise ratio.

摘要翻译： 一种方法由无线网络中的中间设备执行。 该方法包括基于源自第一设备的传输来估计第一跳信道状态。 该方法还包括基于与第二设备相关联的传输来估计端对端信噪比。 该方法还包括基于第一跳信道状态和端对端信噪比来适配中间设备的滤波器或放大器。

公开(公告)号：US20110268208A1

公开(公告)日：2011-11-03

申请号：US13120010

申请日：2008-09-24

申请人： Peter Larsson ,  Jiansog Gan ,  Qingyu Miao

发明人： Peter Larsson ,  Jiansog Gan ,  Qingyu Miao

IPC分类号： H04B7/02

CPC分类号： H04B7/022 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0658 ,  H04B17/318

摘要： Uplink overhead is significantly reduced in a MU-COMP wireless communication network by exploiting the dissimilarity of received signal strength in signals transmitted by geographically distributed transmit antennas, as seen by receiving UEs. Each UE calculates a quantized normalization measure of channel elements for a channel weakly received from a first transmitter to that for a channel strongly received from a second transmitter. The quantized normalization measure may be modeled as a ratio of complex Gaussian variables, and quantized in phase and amplitude by making simplifying assumptions. The ratios are quantized, and transmitted to the network using far fewer bits than would be required to transmit the full channel state information. The network uses the quantized normalization measures to set the transmitter weights.

摘要翻译： MU-COMP无线通信网络中的上行链路开销明显减少，这是通过接收UE所看到的，利用地理分布式发射天线发射的信号中接收信号强度的不相似性。 每个UE计算对于从第一发射机弱接收的信道的信道单元的量化归一化度量，以及对于从第二发射机强烈接收的信道。 量化归一化测量可以通过简化假设来建模为复数高斯变量的比率，并以相位和幅度量化。 这些比率被量化，并且使用比传输全通道状态信息所需的位少得多的比特来传送到网络。 网络使用量化的归一化度量来设置发射机的权重。

公开(公告)号：US08385820B2

公开(公告)日：2013-02-26

申请号：US13144049

申请日：2009-01-12

申请人： Peter Larsson ,  Jiansong Gan

发明人： Peter Larsson ,  Jiansong Gan

IPC分类号： H04B7/14

CPC分类号： H04B7/15585 ,  H04B7/0617 ,  H04B7/0619

摘要： The present application discloses systems and methods for reducing output-to-input feedback signal interference caused by a forwarding node that is configured to forward information received from a transmitter. In some embodiments, this output-to-input feedback signal interference is compensated for by the transmitter. For example, the transmitter is configured such that the signal that is transmitted by transmitter to the forwarding node includes both (1) a primary signal or ‘desired’ signal (e.g., the signal that is intended for a receiving device) and (2) a filtered version of the primary signal. The filter that produces the filtered version of the primary signal is configured (e.g., the filter's filter weights are adapted) such that the filtered version of the primary signal cancels or reduces the undesired output-to-input feedback signal.

摘要翻译： 本申请公开了用于减少由转发节点引起的输出到输入反馈信号的系统和方法，该转发节点被配置为转发从发射机接收的信息。 在一些实施例中，该输出到输入的反馈信号干扰由发射机补偿。 例如，发射机被配置为使得由发射机发送到转发节点的信号包括（1）主信号或期望信号（例如，用于接收设备的信号）和（2）经滤波的 版本的主要信号。 配置产生主信号的滤波版本的滤波器（例如，滤波器的滤波器权重被适配），使得主信号的滤波版本抵消或减少不期望的输出到输入反馈信号。

公开(公告)号：US20110269395A1

公开(公告)日：2011-11-03

申请号：US13144049

申请日：2009-01-12

申请人： Peter Larsson ,  Jiansong Gan

发明人： Peter Larsson ,  Jiansong Gan

IPC分类号： H04B7/14

CPC分类号： H04B7/15585 ,  H04B7/0617 ,  H04B7/0619

摘要： The present application discloses systems and methods for reducing output-to-input feedback signal interference caused by a forwarding node that is configured to forward information received from a transmitter. In some embodiments, this output-to-input feedback signal interference is compensated for by the transmitter. For example, the transmitter is configured such that the signal that is transmitted by transmitter to the forwarding node includes both (1) a primary signal or ‘desired’ signal (e.g., the signal that is intended for a receiving device) and (2) a filtered version of the primary signal. The filter that produces the filtered version of the primary signal is configured (e.g., the filter's filter weights are adapted) such that the filtered version of the primary signal cancels or reduces the undesired output-to-input feedback signal.

摘要翻译： 本申请公开了用于减少由转发节点引起的输出到输入反馈信号的系统和方法，该转发节点被配置为转发从发射机接收的信息。 在一些实施例中，该输出到输入的反馈信号干扰由发射机补偿。 例如，发射机被配置为使得由发射机发送到转发节点的信号包括（1）主信号或“期望”信号（例如，用于接收设备的信号）和（2） 主要信号的滤波版本。 配置产生主信号的滤波版本的滤波器（例如，滤波器的滤波器权重被适配），使得主信号的滤波版本抵消或减少不期望的输出到输入反馈信号。

公开(公告)号：US08937899B2

公开(公告)日：2015-01-20

申请号：US13110285

申请日：2011-05-18

申请人： Yuri C. B. Silva ,  Pedro R. S. Lopes ,  Francisco R. P. Cavalcanti ,  Peter Larsson

发明人： Yuri C. B. Silva ,  Pedro R. S. Lopes ,  Francisco R. P. Cavalcanti ,  Peter Larsson

IPC分类号： H04B7/14 ,  H04B7/155

CPC分类号： H04B7/15521

摘要： Improved amplify-and-forward relaying in a communication network is described, including an example network of multiple single-antenna mobile stations, a multi-antenna relay station, and a multi-antenna base station. Bi-directional communication with improved transmission efficiency is enabled by suitable transmit/receive processing at the relay station without drawbacks of current relaying techniques. Linear transmit and receive processing matrices are disclosed, and it is shown that the numbers of antennas at the relay station and the base station can be substantially the same without reducing network capacity, closely matching the performance for low and high signal to noise ratios of current techniques that require the relay station to have twice as many antennas as the base station.

摘要翻译： 描述了通信网络中的改进的放大和转发中继，包括多个单天线移动站的示例网络，多天线中继站和多天线基站。 具有改善的传输效率的双向通信可以通过在中继站的合适的发送/接收处理来实现，而不存在当前中继技术的缺点。 公开了线性发送和接收处理矩阵，并且示出了中继站和基站处的天线数量可以基本上相同，而不减少网络容量，紧密匹配电流的低和高信噪比的性能 要求中继站具有与基站相同数量的天线的技术。

公开(公告)号：US08838034B2

公开(公告)日：2014-09-16

申请号：US12996846

申请日：2008-06-18

申请人： Peter Larsson

发明人： Peter Larsson

IPC分类号： H04B1/00 ,  H04B7/06 ,  H04B7/04

CPC分类号： H04B7/0619 ,  H04B7/0417

摘要： A distributed antenna system based wireless cellular communication system with transmit side linear interference cancellation is described. In this system the effective channel elements (I) and (II) are estimated and reported by mobile station MS1 and MS2, respectively, to a transmit weight matrix processing apparatus. Processing apparatus uses the effective complex channel matrix (one row reported by each mobile station) to differentially update the transmit weight matrix used for the transmit side linear interference cancellation.

摘要翻译： 描述了一种具有发射侧线性干扰消除的基于分布式天线系统的无线蜂窝通信系统。 在该系统中，有效信道要素（I）和（II）分别由移动台MS1和MS2估计并报告给发射权重矩阵处理装置。 处理装置使用有效的复信道矩阵（每个移动台报告的一行）差分地更新用于发送侧线性干扰消除的发送权重矩阵。