公开(公告)号：US09031024B2

公开(公告)日：2015-05-12

申请号：US13722016

申请日：2012-12-20

申请人： Fengming Cao ,  Zhong Fan

发明人： Fengming Cao ,  Zhong Fan

IPC分类号： H04Q7/00 ,  H04W72/08 ,  H04W72/12

CPC分类号： H04W72/085 ,  H04W72/082 ,  H04W72/1226

摘要： In a network comprising user devices and signal notes, communication links are scheduled by identifying one or more active signal node/user device pairs, wherein each active pair comprises a signal node that is presently communicating with a respective active user device over a signal channel. Then, one or more inactive signal node/user device pairs is identified; each inactive pair comprises an inactive signal node that is not presently communicating over the signal channel and a potential user device that is capable of communicating with the inactive signal node over the signal channel. One of the inactive pairs is then identified which, when made into an active pair, will achieve the greatest total fairness criterion, the total fairness criterion being a sum of a fairness criterion for the potential user device in the inactive pair in question and a fairness criterion for each of the active user devices in the event that the respective inactive pair becomes an active pair. The fairness criterion for each user device is dependent on the transmission rate achievable between the user device and the signal node in its respective pair.

摘要翻译： 在包括用户设备和信号注释的网络中，通过识别一个或多个有源信号节点/用户设备对来调度通信链路，其中每个活动对包括当前通过信号信道与相应的有效用户设备进行通信的信号节点。 然后，识别一个或多个非活动信号节点/用户设备对; 每个非活动对包括当前未通过信号信道进行通信的无效信号节点和能够通过信号信道与无效信号节点进行通信的潜在用户设备。 然后识别其中一个非活动对，当制成活动对时，将达到最大的总体公平性标准，总公平标准是所讨论的无效对中的潜在用户设备的公平标准和公平性之和 在各个非活动对成为活动对的情况下，每个活动用户设备的标准。 每个用户设备的公平性标准取决于用户设备和其相应对中的信号节点之间可实现的传输速率。

公开(公告)号：US07411894B2

公开(公告)日：2008-08-12

申请号：US10666514

申请日：2003-09-18

申请人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

发明人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

IPC分类号： H04J11/00 ,  H04J3/00 ,  H04J1/00

CPC分类号： H04L27/2607

摘要： A transceiver system and method in an OFDM communication system which enables exact symbol synchronization acquisition and improves performance for frequency offset and channel estimation. In the apparatus, a guard interval filling unit copies data at a predetermined interval in an input data row inputted to be transmitted, and fills in the copied data in the preset guard interval in the input data row. A selection unit selectively receives an output data row outputted from the guard interval filling means and unique words having a constant amplitude and a non-periodic auto-correlation characteristic, and outputs the OFDM symbol in which the unique words are inserted in the output data row.

摘要翻译： OFDM通信系统中的收发机系统和方法，其能够精确地进行符号同步采集并提高频偏和信道估计的性能。 在该装置中，保护间隔填充单元以预定的时间间隔复制输入的要输出的输入数据列中的数据，并在输入数据行中以预设的保护间隔填充复制的数据。 选择单元选择性地接收从保护间隔填充装置输出的输出数据行和具有恒定幅度和非周期性自相关特性的唯一字，并将其中插入有唯一字的OFDM符号输出到输出数据行 。

公开(公告)号：US08730788B2

公开(公告)日：2014-05-20

申请号：US13038878

申请日：2011-03-02

申请人： Ngoc-Dung Dao ,  Fengming Cao ,  Yong Sun

发明人： Ngoc-Dung Dao ,  Fengming Cao ,  Yong Sun

IPC分类号： H04J11/00 ,  H04L1/02 ,  H04B7/00 ,  H04L25/03

CPC分类号： H04L25/03343 ,  H04B7/0452 ,  H04B7/0854

摘要： According to one embodiment there is provided a method performed in a transmitter side of a multiuser minimum square error linear precoding MIMO system that comprises a transmitter with a plurality of transmit antennae and a plurality of receivers. Each receiver of the plurality of receivers comprises a plurality of receive antennae. The method is a method of scheduling receivers from among the plurality of receivers and comprises obtaining, for some or all of the receivers, receiver channel information that quantifies the properties of transmit channels between receiver antennae of the receiver and transmit antennae of the transmitter and establishing an order for determining the receiver combining vectors of the some or all of the receivers. The order is established by selecting as a next receiver in the order a so far unselected receiver from the some or all of the receivers that minimally increases the mean square data transmission error. The establishing of the order is based on the channel information of any receivers previously selected in the order and of unselected receivers.

摘要翻译： 根据一个实施例，提供了一种在多用户最小平方误差线性预编码MIMO系统的发射机侧执行的方法，其包括具有多个发射天线和多个接收机的发射机。 多个接收机的每个接收机包括多个接收天线。 该方法是从多个接收机之间调度接收机的方法，包括为接收机的一些或全部获得接收机信道信息，其量化接收机的接收机天线与发射机的发射天线之间的发射信道的属性，并建立 用于确定接收机的一些或所有接收机的组合向量的顺序。 通过以最小程度地增加均方数据传输误差的一些或所有接收器的顺序选择到目前为止的未选择的接收器的顺序来选择下一个接收器。 订单的建立是基于先前在订单中选择的任何接收器和未选择的接收器的信道信息。

公开(公告)号：US08477881B2

公开(公告)日：2013-07-02

申请号：US12830679

申请日：2010-07-06

申请人： Fengming Cao

发明人： Fengming Cao

IPC分类号： H04L27/06

CPC分类号： H04B7/0408 ,  H04B7/0634 ,  H04B7/088

摘要： According to one embodiment there is provided a method of determining receiver beam forming vectors for a plurality of receivers in a MIMO system. Each receiver comprises a plurality of receiver antennae. The MIMO system also comprises a plurality of transmitter antennae. The method comprises quantifying the properties of the channels of the MIMO system in a channel property matrix including interference between individual channels and performing Cholesky decomposition of the receiver property matrix row-by-row into a lower triangular matrix with unit elements along its diagonal, a diagonal matrix and the Hermitian transpose of said triangular matrix. Performing the Cholesky decomposition comprises determining, when performing a step of the Cholesky decomposition for a row, a receiver-beam forming vector associated with the row that maximises the component of the diagonal matrix in the row.

摘要翻译： 根据一个实施例，提供了一种确定MIMO系统中的多个接收机的接收机波束形成向量的方法。 每个接收机包括多个接收机天线。 MIMO系统还包括多个发射机天线。 该方法包括在包括单个信道之间的干扰的信道特性矩阵中量化MIMO系统的信道的属性，并且将接收机属性矩阵逐行地执行Cholesky分解成具有沿其对角线的单位元素的下三角矩阵， 对角矩阵和所述三角矩阵的厄米转置。 执行Cholesky分解包括当对行执行Cholesky分解的步骤时，确定与行中相关联的接收器波束形成向量，其使行中的​​对角矩阵的分量最大化。

公开(公告)号：US20110243045A1

公开(公告)日：2011-10-06

申请号：US13038878

申请日：2011-03-02

申请人： Ngoc-Dung DAO ,  Fengming Cao ,  Yong Sun

发明人： Ngoc-Dung DAO ,  Fengming Cao ,  Yong Sun

IPC分类号： H04W92/00 ,  H04L27/28

CPC分类号： H04L25/03343 ,  H04B7/0452 ,  H04B7/0854

摘要： According to one embodiment there is provided a method performed in a transmitter side of a multiuser minimum square error linear precoding MIMO system that comprises a transmitter with a plurality of transmit antennae and a plurality of receivers. Each receiver of the plurality of receivers comprises a plurality of receive antennae. The method is a method of scheduling receivers from among the plurality of receivers and comprises obtaining, for some or all of the receivers, receiver channel information that quantifies the properties of transmit channels between receiver antennae of the receiver and transmit antennae of the transmitter and establishing an order for determining the receiver combining vectors of the some or all of the receivers. The order is established by selecting as a next receiver in the order a so far unselected receiver from the some or all of the receivers that minimally increases the mean square data transmission error. The establishing of the order is based on the channel information of any receivers previously selected in the order and of unselected receivers.

摘要翻译： 根据一个实施例，提供了一种在多用户最小平方误差线性预编码MIMO系统的发射机侧执行的方法，其包括具有多个发射天线和多个接收机的发射机。 多个接收机的每个接收机包括多个接收天线。 该方法是从多个接收机之间调度接收机的方法，包括为接收机的一些或全部获得接收机信道信息，其量化接收机的接收机天线与发射机的发射天线之间的发射信道的属性，并建立 用于确定接收机的一些或所有接收机的组合向量的顺序。 通过以最小程度地增加均方数据传输误差的一些或所有接收器的顺序选择到目前为止的未选择的接收器的顺序来选择下一个接收器。 订单的建立是基于先前在订单中选择的任何接收器和未选择的接收器的信道信息。