公开(公告)号：US20090257423A1

公开(公告)日：2009-10-15

申请号：US12423485

申请日：2009-04-14

申请人： Young Hoon Kwon ,  Yang Tang ,  Tao Wu

发明人： Young Hoon Kwon ,  Yang Tang ,  Tao Wu

IPC分类号： H04B7/00 ,  H04J3/00

CPC分类号： H04B7/0626

摘要： A system and method for channel status information feedback in a wireless communications system is provided. A method includes receiving a transmission containing feedback information from a mobile station (MS) having N total antennas, M receive/transmit antennas, N−M receive-only antennas, wherein N and M are integers and N>M, decoding the received transmission, computing estimates of CSI for channel elements of N−M receive-only antennas using the decoded transmission, computing estimates of CSI for channel elements of M receive/transmit antennas using channel reciprocity, and computing a precoding matrix from the channel elements for the N−M receive-only antennas and the M receive/transmit antennas.

摘要翻译： 提供了一种用于无线通信系统中的信道状态信息反馈的系统和方法。 一种方法包括从具有N个总天线的移动站（MS）接收包含反馈信息的传输，M个接收/发送天线，仅NM个接收天线，其中N和M是整数，并且N> M，解码所接收的传输，计算 使用解码的传输对NM接收天线的信道单元的CSI的估计，使用信道互逆计算M个接收/发射天线的信道单元的CSI的估计，以及从NM只接收天线的信道单元计算预编码矩阵 和M个接收/发射天线。

公开(公告)号：US07599394B2

公开(公告)日：2009-10-06

申请号：US10718939

申请日：2003-11-21

申请人： Patrick Hosein ,  Tao Wu

发明人： Patrick Hosein ,  Tao Wu

IPC分类号： H04J3/22

CPC分类号： H04W52/267 ,  H04L1/0002 ,  H04L1/0019 ,  H04L1/0025

摘要： A mobile station dynamically adjusts its data transmission rate based on periodic load indications from a base station. The mobile station calculates a load tracking value based on two or more periodic load indications, and then calculates a rate change probability as a function of the load tracking value. The mobile station selectively changes its transmission rate responsive to a current load indication based on the rate change probability.

摘要翻译： 移动台基于来自基站的周期性负载指示动态地调整其数据传输速率。 移动台基于两个以上的周期性负载指示来计算负载跟踪值，然后计算作为负载跟踪值的函数的速率变化概率。 基于速率变化概率，移动台根据当前负载指示选择性地改变其传输速率。

公开(公告)号：US20090082028A1

公开(公告)日：2009-03-26

申请号：US12200640

申请日：2008-08-28

申请人： Patrick Hosein ,  Tao Wu

发明人： Patrick Hosein ,  Tao Wu

IPC分类号： H04W88/00

CPC分类号： H04W72/04 ,  H04L5/0023 ,  H04L5/0076 ,  H04W52/146 ,  H04W52/346 ,  H04W52/367 ,  H04W72/12

摘要： System and method for utility-based scheduling for SDMA transmissions on an uplink of a wireless communications network. A method comprises assigning a utility function to each user in a set of users, selecting a set of selected users from the set of users, assigning uplink transmission resources to each user in the set of selected users, and transmitting a control message to each user in the set of selected users. The selecting comprises iteratively selecting up to K users one user at a time from the set of users, wherein a combination of the selected users maximally increases a value of the assigned utility functions, wherein K is a maximum number of users in the set of selected users

摘要翻译： 用于在无线通信网络的上行链路上的SDMA传输的基于公用事业的调度的系统和方法。 一种方法包括向一组用户中的每个用户分配效用函数，从所述用户组中选择一组所选择的用户，向所述用户组中的每个用户分配上行链路传输资源，以及向每个用户发送控制消息 在所选用户的集合中。 选择包括从用户集合一次迭代地选择一个用户的一个用户，其中所选择的用户的组合最大程度地增加所分配的效用函数的值，其中K是所选择的集合中的最大用户数 用户

公开(公告)号：US07469146B2

公开(公告)日：2008-12-23

申请号：US10889554

申请日：2004-07-12

申请人： Anthony C. K. Soong ,  Tao Wu ,  Thawatt Gopal ,  Young C. Yoon ,  Shiau-He Shawn Tsai

发明人： Anthony C. K. Soong ,  Tao Wu ,  Thawatt Gopal ,  Young C. Yoon ,  Shiau-He Shawn Tsai

IPC分类号： H04Q7/20

CPC分类号： H04W28/18 ,  H04L1/0625 ,  H04W52/16 ,  H04W52/325 ,  H04W52/36 ,  H04W52/40

摘要： A wireless communication network receives packet data transmissions from a mobile station, tracks the occurrence of retransmission requests sent to the mobile station responsive thereto, and modifies the radio link assignments for the mobile station based at least in part on said tracking. For example, a base station controller may be configured to manage the active set of a mobile station based on the number and/or frequency of NACK messages sent by the radio base stations in the mobile station's active set(s) responsive to packet data transmissions from the mobile station. The ACK/NACK response of a radio base station to mobile station transmissions may be used to detect link imbalance, identify poor reverse link channels, etc. The base station controller can add or change radio links based on the ACK/NACK response to improve reverse link performance, trigger voice call handoff, correct link imbalance, etc.

摘要翻译： 无线通信网络从移动站接收分组数据传输，响应于此而跟踪发送到移动站的重传请求的发生，并且至少部分地基于所述跟踪修改移动台的无线电链路分配。 例如，基站控制器可以被配置为基于移动台的活动组中的无线电基站响应于分组数据传输发送的NACK消息的数量和/或频率来管理移动台的活动集合 从移动台。 无线电基站对移动台传输的ACK / NACK响应可用于检测链路不平衡，识别差的反向链路信道等。基站控制器可以基于ACK / NACK响应来添加或改变无线电链路以改善反向 链路性能，触发语音呼叫切换，链路不平衡等。

公开(公告)号：US20070033040A1

公开(公告)日：2007-02-08

申请号：US10511236

申请日：2003-04-10

申请人： Shengyang Huang ,  Hiroshi Katukura ,  Tao Wu ,  Dong Li

发明人： Shengyang Huang ,  Hiroshi Katukura ,  Tao Wu ,  Dong Li

IPC分类号： G10L15/04

CPC分类号： G10L15/1822 ,  G06F17/2755 ,  G06F17/2881

摘要： The present invention includes a morpheme extracting unit 420 configured to extract, based on a character string corresponding to input information, at least one morpheme constituting a minimum unit of the character string, as first morpheme information, a topic search unit 340 configured to compare the first morpheme information extracted at the morpheme extracting unit 420 with topic titles, and to search a topic title corresponding to the first morpheme information from among the topic titles, and a reply retrieval unit 350 configured to retrieve, based on the topic title searched at a topic identification information search unit 320, a reply sentence associated with the topic title.

摘要翻译： 本发明包括：语素提取单元420，被配置为基于与输入信息对应的字符串，提取构成字符串的最小单位的至少一个语素作为第一语素信息;主题搜索单元340，被配置为将 在具有主题标题的语素提取单元420处提取的第一语素信息，并且从主题标题中搜索与第一语素信息相对应的主题标题，以及应答检索单元350，被配置为基于在主题标题中搜索的主题标题 主题识别信息搜索单元320，与主题标题相关联的回复句子。

公开(公告)号：US20060217101A1

公开(公告)日：2006-09-28

申请号：US11086045

申请日：2005-03-22

申请人： Lawrence Connell ,  David Kovac ,  Poojan Wagh ,  Vikram Karnani ,  William Waldie ,  Tao Wu

发明人： Lawrence Connell ,  David Kovac ,  Poojan Wagh ,  Vikram Karnani ,  William Waldie ,  Tao Wu

IPC分类号： H04B1/26

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0084 ,  H03D2200/0088

摘要： Transmission of a high frequency signal is provided by a passive mixer. The passive mixer receives a low frequency signal as an input. The passive mixer includes a plurality of transistors each with a gate, a source, and a drain. The passive mixer also includes a local oscillator connected to the gates of the transistors. The gates of the transistors are also connected to a DC bias proportional to the threshold voltage of the transistors. In addition, an output of the passive mixer may be attenuated by a passive attenuator wherein both the passive attenuator and passive mixer are substantially free of quiescent current.

摘要翻译： 高频信号的传输由无源混频器提供。 无源混频器接收低频信号作为输入。 无源混频器包括多个晶体管，每个具有栅极，源极和漏极。 无源混频器还包括连接到晶体管的栅极的本地振荡器。 晶体管的栅极也连接到与晶体管的阈值电压成比例的DC偏置。 此外，无源混频器的输出可以被无源衰减器衰减，其中无源衰减器和无源混频器都基本上没有静态电流。

公开(公告)号：US20060133268A1

公开(公告)日：2006-06-22

申请号：US11018773

申请日：2004-12-21

申请人： Tao Wu ,  Wanshi Chen ,  Young Yoon ,  Jonas Wiorek ,  Anthony Soong

发明人： Tao Wu ,  Wanshi Chen ,  Young Yoon ,  Jonas Wiorek ,  Anthony Soong

IPC分类号： H04Q7/24 ,  H04Q7/00 ,  H04L12/26 ,  H04J3/22 ,  H04J3/16 ,  H04L1/00

CPC分类号： H04L1/1812 ,  H04L1/0009 ,  H04L1/1867 ,  H04L41/0816 ,  H04L41/0886 ,  H04W24/00 ,  H04W28/18 ,  H04W52/04

摘要： A wireless communication network improves reverse link communication performance by changing one or more Automatic Repeat Request (ARQ) control settings as a function of measured or estimated reverse link loading. Control settings can be changed on a per-sector basis, allowing consideration of different loading conditions in different radio sectors of the network. Further, control settings can be changed for individual mobile stations, or selected groups of mobile stations, allowing different ARQ controls to be used for different mobile stations. By way of non-limiting example, a control circuit in a base station controller can be configured to take advantage of light reverse link loading conditions in a given radio sector by changing the ARQ control parameter(s) used for one or more mobile stations operating in that sector so that fewer ARQ retransmissions are required for those mobile stations to transmit reverse link data to the network.

摘要翻译： 无线通信网络通过改变作为测量或估计的反向链路负载的函数的一个或多个自动重传请求（ARQ）控制设置来改善反向链路通信性能。 可以在每个扇区的基础上改变控制设置，允许考虑网络不同无线电扇区中的不同负载条件。 此外，可以针对各个移动站或选定的移动站组来改变控制设置，允许不同的ARQ控制被用于不同的移动站。 作为非限制性示例，基站控制器中的控制电路可以被配置为通过改变用于一个或多个移动站操作的ARQ控制参数来利用给定无线电扇区中的轻反向链路负载条件 在该扇区中，因此这些移动站需要较少的ARQ重传来向网络发送反向链路数据。

公开(公告)号：US07039672B2

公开(公告)日：2006-05-02

申请号：US10409284

申请日：2003-04-08

申请人： Tao Wu ,  Sadhna Ahuja ,  Sudhir Sharan Dixit

发明人： Tao Wu ,  Sadhna Ahuja ,  Sudhir Sharan Dixit

IPC分类号： G06F15/16

CPC分类号： H04L67/306 ,  H04L12/18 ,  H04L12/1859 ,  H04L29/06 ,  H04L69/329 ,  H04W4/00

摘要： Systems and methods are provided for delivering content in a communications system. A communications system is provided that includes a plurality of terminals and a content director. The terminals are adapted to communicate via a communications network, and are each capable of requesting and thereafter receiving content via the communications network. The content director, on the other hand, is capable of receiving a request for content from one terminal. The content director can then push the content to the terminal based upon the request, and push the content to at least one other terminal before the other terminals request the content. Each terminal can have an associated user interest correlation with each other terminal. In such instances, the content director can push the content to other terminals based upon the user interest correlation of the other terminals with respect to the terminal requesting the content.

公开(公告)号：US20050181834A1

公开(公告)日：2005-08-18

申请号：US11017338

申请日：2004-12-20

申请人： Wanshi Chen ,  Rath Vannithamby ,  Shiau-He Shawn Tsai ,  Young Yoon ,  Anthony Soong ,  Tao Wu

发明人： Wanshi Chen ,  Rath Vannithamby ,  Shiau-He Shawn Tsai ,  Young Yoon ,  Anthony Soong ,  Tao Wu

IPC分类号： H04L1/00 ,  H04L1/18 ,  H04W36/18 ,  H04Q7/20

CPC分类号： H04L1/1845 ,  H04L1/189 ,  H04L2001/0093 ,  H04W36/18

摘要： A base station generates per-cell ACK/NACK responses rather than per-sector ACK/NACK responses. For a given mobile station signal received in softer handoff at two of the base station's sectors, the base station generates an ACK response if at least one of the soft handoff sectors correctly receives the signal, and otherwise generates a NACK response. Alternatively, the base station can combine the softer handoff signals and generate ACK/NACK responses based on whether the combined signal is correctly received. Since only one set of ACK/NACK responses are generated for all of the softer handoff sectors, the base station can use the forward link in just one softer handoff sector to send the ACK/NACK responses to the mobile station, consuming fewer forward link transmit resources at the base station. Or, the base station can send the same ACK/NACK responses from two or more softer handoff sectors, thus allowing diversity combining of the ACK/NACK responses at the mobile station.

摘要翻译： 基站产生每小区ACK / NACK响应而不是每扇区ACK / NACK响应。 对于在两个基站扇区的较软切换中接收到的给定移动站信号，如果软切换扇区中的至少一个正确地接收到该信号，则基站产生ACK响应，否则产生NACK响应。 或者，基站可以组合较软切换信号，并且基于组合信号是否被正确接收来生成ACK / NACK响应。 由于仅为所有更软切换扇区生成一组ACK / NACK响应，所以基站可以在仅一个较软切换扇区中使用前向链路来向移动台发送ACK / NACK响应，从而消耗较少的前向链路传输 资源在基站。 或者，基站可以从两个或更多个更软切换扇区发送相同的ACK / NACK响应，从而允许在移动站处的ACK / NACK响应的分集组合。

公开(公告)号：US20050105679A1

公开(公告)日：2005-05-19

申请号：US10776690

申请日：2004-02-11

申请人： Tao Wu ,  Alex Stewart ,  Martin Stanton ,  Walter Phillips ,  Daniel Kopans ,  Richard Moore

发明人： Tao Wu ,  Alex Stewart ,  Martin Stanton ,  Walter Phillips ,  Daniel Kopans ,  Richard Moore

IPC分类号： A61B6/00 ,  A61B6/03 ,  G01N23/04 ,  G06T11/00 ,  G21K1/12 ,  G01N23/00 ,  H05G1/60

CPC分类号： G06T11/006 ,  A61B6/025 ,  A61B6/502 ,  A61B6/583 ,  G01N23/04 ,  G06T2211/424 ,  G06T2211/436

摘要： A system for three-dimensional tomosynthesis imaging of a target element is provided having an image acquisition element and a processor. The image acquisition element obtains a plurality of images of the target element from a plurality of angles and includes a radiation source that is positionable at a plurality of angles with respect to the target element and a radiation detector. The radiation detector is positioned so as to detect radiation emitted by the radiation source passing through the target element and determine a plurality of attenuation values for radiation passing through the target element to establish a radiation absorbance projection image of the target element for a particular radiation source angle. The processor is configured to apply an iterative reconstruction algorithm to the radiation absorbance projection images of the target element obtained from a plurality of radiation source angles to generate a three-dimensional reconstruction of the target element. The system can gain further accuracy where the iterative reconstruction algorithm is applied using cone-beam forward projection and back projection.

摘要翻译： 提供了具有图像采集元件和处理器的目标元件的三维断层合成成像系统。 图像采集元件从多个角度获得目标元件的多个图像，并且包括可相对于目标元件以多个角度定位的辐射源和放射线检测器。 放射线检测器被定位成检测通过目标元件的辐射源发射的辐射，并确定用于通过目标元件的辐射的多个衰减值，以建立用于特定辐射源的目标元件的辐射吸收投影图像 角度。 处理器被配置为对从多个辐射源角度获得的目标元件的辐射吸收投影图像应用迭代重建算法，以产生目标元素的三维重建。 在使用锥束前向投影和反投影应用迭代重建算法的情况下，系统可以获得进一步的准确性。