公开(公告)号：US07756099B2

公开(公告)日：2010-07-13

申请号：US11777356

申请日：2007-07-13

申请人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/208

CPC分类号： H04B7/0628 ,  H04B7/0404 ,  H04B7/0413 ,  H04B7/0691 ,  H04B7/0874 ,  H04B7/0888 ,  H04B17/309

摘要： A method selects antennas in an OFDMA network. A channel state of a downlink is measured using a downlink subframe received in a mobile station from a base station. A channel state of an uplink is measured using an uplink subframe received in the base station from the mobile station. Next, the method compares the channel states to determine whether the downlink and the uplink are reciprocal or not. The mobile station can perform receive antenna selection based on the quality of the downlink channel state. The mobile station can also perform transmit antenna selection when instructed by the base station.

摘要翻译： 一种方法选择OFDMA网络中的天线。 使用从基站在移动台中接收的下行链路子帧来测量下行链路的信道状态。 使用从移动站在基站中接收的上行链路子帧来测量上行链路的信道状态。 接下来，该方法比较信道状态以确定下行链路和上行链路是否是倒数的。 移动台可以基于下行链路信道状态的质量来执行接收天线选择。 当基站指示时，移动站也可以执行发射天线选择。

公开(公告)号：US07729659B2

公开(公告)日：2010-06-01

申请号：US11454568

申请日：2006-06-16

申请人： Andreas F. Molisch ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/00

CPC分类号： H04W64/00 ,  G01S13/767 ,  H04B1/7163 ,  H04B17/27

摘要： A method signals a quality of range estimates in a UWB network. For each range estimate, a confidence level of a range estimate is signaled, a confidence interval for the range estimate is signaled, and a confidence interval scaling factor for the confidence interval is signaled.

摘要翻译： 一种方法用信号通知UWB网络中的距离估计的质量。 对于每个范围估计，用信号通知距离估计的置信水平，用信号通知距离估计的置信区间，并且用信号通知置信区间的置信区间缩放因子。

公开(公告)号：US20090225883A1

公开(公告)日：2009-09-10

申请号：US12403025

申请日：2009-03-12

申请人： Philip V. Orlik ,  Toshiyuki Kuze ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Toshiyuki Kuze ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

IPC分类号： H04L27/28 ,  H04W84/00

CPC分类号： H04W72/046 ,  H04W4/08 ,  H04W24/10 ,  H04W72/085

摘要： A base station transmits a set of sounding requests to a set of mobile station (MS) in a cell, using a set of beams, wherein there is one beam for each sounding request. Qualities of sounding signals transmitted by the set of MSs in response to receiving the sounding request are measured, and the set of MSs are grouping into subsets according to the qualities, wherein there is one subset of MSs associated with each beam.

摘要翻译： 基站使用一组波束向小区中的一组移动台（MS）发送一组探测请求，其中对于每个探测请求存在一个波束。 测量响应于接收到探测请求的MS组发送的探测信号的质量，并且根据质量将MS组合成子集，其中存在与每个波束相关联的MS的一个子集。

公开(公告)号：US20090170458A1

公开(公告)日：2009-07-02

申请号：US11995394

申请日：2005-07-19

申请人： Andreas F. Molisch ,  Ismail Guvenc ,  Zafer Sahinoglu

发明人： Andreas F. Molisch ,  Ismail Guvenc ,  Zafer Sahinoglu

IPC分类号： H04B17/00

CPC分类号： H04B1/71637 ,  H04B1/7183

摘要： A method for identifying a leading edge time period of a received radio signal includes identifying a greatest energy time period in a sequence of time periods. The received radio signal has a greatest average energy in the greatest energy time period. The method also includes identifying a least energy time period in the sequence of time periods. The received radio signal has a least average energy in the least energy time period. Further, the method includes setting a threshold energy based on the greatest average energy and the least average energy, determining a number of window time periods based on a characteristic of a radio channel used by the received radio signal, and identifying as a leading edge time period an earliest time period that precedes the greatest energy time period within the number of window time periods. The received radio signal in the leading edge time period has an average energy greater than or equal to the threshold energy.

摘要翻译： 一种用于识别所接收的无线电信号的前沿时间段的方法包括识别时间序列中的最大能量时间段。 接收的无线电信号在最大能量时间段内具有最大的平均能量。 该方法还包括识别时间序列中的最少能量时间段。 所接收的无线电信号在最短能量时间段内具有最小平均能量。 此外，该方法包括基于最大平均能量和最小平均能量来设置阈值能量，基于由所接收的无线电信号使用的无线电信道的特性确定窗口时间段的数量，以及将其识别为前沿时间 期间是在窗口时间段内的最大能量时间段之前的最早时间段。 在前沿时间段中接收的无线电信号具有大于或等于阈值能量的平均能量。

公开(公告)号：US20090075590A1

公开(公告)日：2009-03-19

申请号：US11577106

申请日：2005-04-15

申请人： Zafer Sahinoglu ,  Ismail Guvenc ,  Andreas F. Molisch

发明人： Zafer Sahinoglu ,  Ismail Guvenc ,  Andreas F. Molisch

IPC分类号： H04B7/24

CPC分类号： H04B1/71637 ,  G01S5/0221 ,  G01S13/76 ,  H04B17/318 ,  H04B17/336 ,  H04B17/345

摘要： A method and system (500) estimates a time of arrival of a signal received via a wireless communications channel. The energy in the received signal is conditioned at multiple different time scales to produce a conditioned signal (700). Then, a leading edge is detected in the conditioned signal (550). The leading edge corresponds to the time of arrival of the received signal (551).

摘要翻译： 方法和系统（500）估计经由无线通信信道接收的信号的到达时间。 接收信号中的能量被调节在多个不同的时标上以产生调节信号（700）。 然后，在调节信号（550）中检测前沿。 前沿对应于接收信号的到达时间（551）。

公开(公告)号：US20080247370A1

公开(公告)日：2008-10-09

申请号：US12088285

申请日：2005-09-30

申请人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

发明人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

IPC分类号： H04Q7/24

CPC分类号： H04B7/0691 ,  H04B7/024 ,  H04B7/0695 ,  H04B7/0851 ,  H04B7/0874 ,  H04B7/088

摘要： A computer implemented method selects antennas in a multiple-input, multiple-output wireless local area network that includes multiple stations, and each station includes a set of antennas. Multiple consecutively transmitted sounding packets are received in a station. Each sounding packet corresponds to a different subset of the set of antennas. A channel matrix is estimated from the multiple consecutively transmitted sounding packets, and a subset of antennas is selected according to the channel matrix.

摘要翻译： 计算机实现的方法选择包括多个站的多输入多输出无线局域网中的天线，并且每个站包括一组天线。 在站中接收到多个连续发送的探测包。 每个探测包对应于该组天线的不同子集。 从多个连续发送的探测分组估计信道矩阵，并根据信道矩阵选择天线子集。

公开(公告)号：US20080144562A1

公开(公告)日：2008-06-19

申请号：US12039843

申请日：2008-02-29

申请人： Stark C. Draper ,  Lingjia Liu ,  Andreas F. Molisch ,  Jonathan S. Yedidia

发明人： Stark C. Draper ,  Lingjia Liu ,  Andreas F. Molisch ,  Jonathan S. Yedidia

IPC分类号： H04B7/14 ,  H04L12/56

CPC分类号： H04B7/2606 ,  H04B7/026 ,  H04B7/15592 ,  H04L1/06 ,  H04L1/0618 ,  H04L2001/0092 ,  H04W52/46

摘要： A route is selected in a wireless cooperative relay network of nodes. A decoding order is initialized. A set of resources is minimized subject to constraints. The resources are allocated to the nodes in the decoding order. The decoding order is changed iteratively to further minimize the allocated resources, until a minimum is reached. A code word is transmitted when the allocated resources are at the minimum, which can either be determined globally or locally at each node. The method can operate in a centralized or distributed manner.

摘要翻译： 在节点的无线协作中继网络中选择路由。 解码顺序被初始化。 一系列资源在受限制的情况下被最小化。 资源按解码顺序分配给节点。 迭代地改变解码顺序，以进一步最小化分配的资源，直到达到最小值。 当分配的资源为最小时，发送码字，这可以在每个节点全局或局部地确定。 该方法可以集中或分布式运行。

公开(公告)号：US20080075007A1

公开(公告)日：2008-03-27

申请号：US11527267

申请日：2006-09-25

申请人： Neelesh B. Mehta ,  Ritesh Madan ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Neelesh B. Mehta ,  Ritesh Madan ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04J3/14 ,  H04L12/28

CPC分类号： H04W40/22 ,  H04B7/15592 ,  H04L45/12 ,  H04L45/24 ,  H04W40/08 ,  Y02D70/122 ,  Y02D70/324 ,  Y02D70/39 ,  Y02D70/446

摘要： A method selects an optimal route in a cooperative relay network including a set of nodes. For each node in a set of nodes of a cooperative relay network, dynamically varying channel state information is determined. A transmission policy based on the dynamically-varying channel state information is selected, in which the transmission policy includes selected nodes forming an optimal route, a transmission mode for each selected node, and a transmission power for each selected node.

摘要翻译： 一种方法在包括一组节点的协作中继网络中选择最优路由。 对于协作中继网络的一组节点中的每个节点，确定动态变化的信道状态信息。 选择基于动态变化的信道状态信息的传输策略，其中传输策略包括形成最佳路由的选定节点，每个选定节点的传输模式以及每个选择节点的传输功率。

公开(公告)号：US20080051149A1

公开(公告)日：2008-02-28

申请号：US11620105

申请日：2007-01-05

申请人： Neelesh B. Mehta ,  Erdem Bala ,  Jinyun Zhang ,  Andreas F. Molisch

发明人： Neelesh B. Mehta ,  Erdem Bala ,  Jinyun Zhang ,  Andreas F. Molisch

IPC分类号： H04B1/02 ,  H04M1/00 ,  H04B7/02

CPC分类号： H04B7/061 ,  H04L1/0026 ,  H04L1/06 ,  H04L5/023 ,  H04L25/0224 ,  H04L27/261

摘要： A method and system selects a subset of antennas from a set of antennas to transmit user data in a wireless communication system. The user data is transmitted during a first transmission time intervals (TTI) using a first subset of antennas. Pilot tones are transmitted during a second TTI using a second subset of antennas. Corresponding channel qualities are estimated for the first subset of antennas and the second subset of antennas from the user data and the pilot tones. Then, based on the estimating, a best subset of antenna is selected from the first subset of antennas and the second subset of antennas to transmit the user data during a subsequent TTI.

摘要翻译： 一种方法和系统从一组天线中选择天线的子集以在无线通信系统中传送用户数据。 使用第一天线子集在第一传输时间间隔（TTI）期间发送用户数据。 在第二TTI期间使用第二天线子集来传送导频音调。 对于天线的第一子集和来自用户数据和导频音的第二子天线子集估计相应的信道质量。 然后，基于估计，从天线的第一子集和第二天线子集中选择天线的最佳子集，以在随后的TTI期间发送用户数据。

公开(公告)号：US08284686B2

公开(公告)日：2012-10-09

申请号：US12293458

申请日：2006-03-30

申请人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

发明人： Daqing Gu ,  Hongyuan Zhang ,  Jinyun Zhang ,  Andreas F. Molisch

IPC分类号： H04W4/00

CPC分类号： H04B7/0691 ,  H04B7/0608 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0634 ,  H04B7/0636 ,  H04B7/0695 ,  H04B7/0874 ,  H04B7/088 ,  H04W84/12

摘要： A method selects antennas in a multiple-input, multiple-output (MIMO) wireless local area network (WLAN) that includes a plurality of stations, and each station includes a set of antennas. Plural consecutive packets, received at a station, include plural consecutive sounding packets. Each sounding packet corresponds to a different subset of the set of antennas, and at least one of the plural consecutive packets includes a high throughput (HT) control field including a signal to initiate antenna selection and a number N indicative of a number of sounding packets which follow the at least one packet including the HT control field and which are to be used for antenna selection. A channel matrix is estimated based on a characteristic of the channel as indicated by the received N sounding packets, and a subset of antennas is selected according to the channel matrix. Station and computer program product embodiments include similar features.

摘要翻译： 一种方法选择包括多个站的多输入多输出（MIMO）无线局域网（WLAN）中的天线，并且每个站包括一组天线。 在站处接收的多个连续分组包括多个连续的探测分组。 每个探测分组对应于该组天线的不同子集，并且多个连续分组中的至少一个分组包括高吞吐量（HT）控制字段，包括用于发起天线选择的信号和指示多个探测分组的数量N 其遵循至少一个包括HT控制字段并将用于天线选择的分组。 基于由接收的N个探测分组指示的信道的特性来估计信道矩阵，并且根据信道矩阵选择天线的子集。 站和计算机程序产品实施例包括类似的特征。