公开(公告)号：US20130003621A1

公开(公告)日：2013-01-03

申请号：US13344253

申请日：2012-01-05

申请人： Xiaolong Huang ,  Vijayalakshmi R. Raveendran ,  Xiaodong Wang ,  Fawad Shaukat

发明人： Xiaolong Huang ,  Vijayalakshmi R. Raveendran ,  Xiaodong Wang ,  Fawad Shaukat

IPC分类号： H04L12/56 ,  H04W76/02

CPC分类号： H04L65/00 ,  H04L69/24 ,  H04W99/00

摘要： As part of a communication session, a wireless source device can transmit audio and video data to a wireless sink device, and the wireless sink device can transmit user input data received at the wireless sink device back to the wireless source device. In this manner, a user of the wireless sink device can control the wireless source device and control the content that is being transmitted from the wireless source device to the wireless sink device. The user input data transmitted by the wireless sink device can be input data obtained at a third party device and forwarded to the wireless source device.

摘要翻译： 作为通信会话的一部分，无线源设备可以将音频和视频数据传输到无线宿设备，并且无线宿设备可以将在无线宿设备处接收的用户输入数据发送回无线源设备。 以这种方式，无线接收设备的用户可以控制无线源设备并且控制正在从无线源设备发送到无线接收设备的内容。 由无线接收设备发送的用户输入数据可以是在第三方设备获得的输入数据，并转发给无线源设备。

公开(公告)号：US20130002949A1

公开(公告)日：2013-01-03

申请号：US13344291

申请日：2012-01-05

申请人： Vijayalakshmi R. Raveendran ,  Xiaolong Huang ,  Xiaodong Wang ,  Fawad Shaukat

发明人： Vijayalakshmi R. Raveendran ,  Xiaolong Huang ,  Xiaodong Wang ,  Fawad Shaukat

IPC分类号： H04N7/04

CPC分类号： H04W28/18 ,  H04L65/4092

摘要： As part of a communication session, a wireless source device can transmit audio and video data to a wireless sink device, and the wireless sink device can transmit user inputs received at the wireless sink device back to the wireless source device. In this manner, a user of the wireless sink device can control the wireless source device and control the content that is being transmitted from the wireless source device to the wireless sink device. As part of establishing the communication session, the wireless sink device and the wireless source device may perform capability negotiation.

摘要翻译： 作为通信会话的一部分，无线源设备可以将音频和视频数据发送到无线接收设备，并且无线接收设备可以将在无线接收设备处接收的用户输入发送回无线源设备。 以这种方式，无线接收设备的用户可以控制无线源设备并且控制正在从无线源设备发送到无线接收设备的内容。 作为建立通信会话的一部分，无线接收设备和无线源设备可以执行能力协商。

公开(公告)号：US08341467B2

公开(公告)日：2012-12-25

申请号：US12498042

申请日：2009-07-06

申请人： Guosen Yue ,  Xiaodong Wang

发明人： Guosen Yue ,  Xiaodong Wang

IPC分类号： G06F11/00

CPC分类号： H04L1/1825 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009

摘要： A method and system for packet transmission in a hybrid automatic repeat request (ARQ) system. A modulation and a block length for a transmission are determined based on the average mutual information per bit. The average mutual information per bit is computed based on a current channel signal-to-noise ratio and a plurality of previous transmissions, each being transmitted with a respective coded block length, modulation form, and signal-to-noise ratio. A block error rate is computed for the potential block lengths and modulations based on the average mutual information per bit, and a throughput of the current transmission is determined based on the block error rate. The modulation form and the block length of the transmission are determined based on an analysis of the throughput. If the receiver cannot decode the current transmission, the transmitter repeats the computation to determine the modulation and the block length for retransmission.

摘要翻译： 一种混合自动重传请求（ARQ）系统中分组传输的方法和系统。 基于每比特的平均互信息来确定传输的调制和块长度。 基于当前信道信噪比和多个先前传输来计算每比特的平均互信息，每个传输以相应的编码块长度，调制形式和信噪比进行传输。 基于每比特的平均互信息计算潜在块长度和调制的块错误率，并且基于块错误率来确定当前传输的吞吐量。 基于吞吐量的分析来确定传输的调制形式和块长度。 如果接收机不能解码当前的传输，则发射机重复计算以确定用于重传的调制和块长度。

公开(公告)号：US20120281662A1

公开(公告)日：2012-11-08

申请号：US13550099

申请日：2012-07-16

申请人： Narayan Prasad ,  Mohammad Ali Khojastepour ,  Meilong Jiang ,  Xiaodong Wang ,  Sampath Rangarajan

发明人： Narayan Prasad ,  Mohammad Ali Khojastepour ,  Meilong Jiang ,  Xiaodong Wang ,  Sampath Rangarajan

IPC分类号： H04W72/08 ,  H04W72/12

CPC分类号： H04W72/04 ,  H04B7/0452 ,  H04B7/0639 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/20 ,  H04L5/0007 ,  H04L25/0208 ,  H04W8/26 ,  H04W28/04 ,  H04W52/346 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/1231 ,  H04W72/1289

摘要： A user equipment (UE) used in a multi-user (MU)-multiple input multiple output (MIMO) orthogonal frequency division multiple access (OFDMA) system is disclosed. The UE includes a receiving unit to receive from a base station an indication of an estimate of or an upper-bound on the total number of MU-MIMO user equipments (|S|) that are scheduled on a sub-band by the base station, wherein the sub-band includes one or more resource units, a calculation unit to calculate channel quality based on the indication of the estimate of or the upper-bound on the total number of MU-MIMO user equipments, and a transmission unit to transmit to the base station an indication of the channel quality. Other methods and apparatuses also are disclosed.

摘要翻译： 公开了在多用户（MU） - 多输入多输出（MIMO）正交频分多址（OFDMA）系统中使用的用户设备（UE）。 UE包括：接收单元，用于从基站接收由基站在子带上调度的MU-MIMO用户设备（| S |）的总数的估计或上限的指示; 其特征在于，所述子带包括一个以上的资源单元，基于MU-MIMO用户设备的总数的估计或上限的指示来计算信道质量的计算单元，以及发送单元 向基站提供信道质量的指示。 还公开了其它方法和装置。

公开(公告)号：US20120057558A1

公开(公告)日：2012-03-08

申请号：US13296394

申请日：2011-11-15

申请人： Narayan Prasad ,  Mohammad Ali Khojastepour ,  Meilong Jiang ,  Xiaodong Wang ,  Sampath Rangarajan

发明人： Narayan Prasad ,  Mohammad Ali Khojastepour ,  Meilong Jiang ,  Xiaodong Wang ,  Sampath Rangarajan

IPC分类号： H04W72/04

CPC分类号： H04W72/04 ,  H04B7/0452 ,  H04B7/0639 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/20 ,  H04L5/0007 ,  H04L25/0208 ,  H04W8/26 ,  H04W28/04 ,  H04W52/346 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/1231 ,  H04W72/1289

摘要： Methods and systems for conveying or transmitting to any given user in an OFDMA-MU-MIMO system scheduling information of other co-scheduled users to permit the user to perform error-correction on received data and/or interference reduction on its received signals. The scheduling information can include resource block assignment, modulation constellations employed, coding rates employed, power levels utilized and precoder matrix indices used. Further, the scheduling information can be conveyed in part through dedicated reference symbol layers or pilot streams. Moreover, a base station may transmit a preliminary estimate of the total number of users the base station expects to schedule, or an upper-bound on the total number of users, to the MU-MIMO users to permit the MU-MIMO users to determine preferred precoder matrix indices and indications of channel quality indices.

摘要翻译： 在OFDMA-MU-MIMO系统中向任何给定用户传送或发送给其他协调调度用户的信息的方法和系统，以允许用户对接收到的数据执行纠错和/或对其接收信号的干扰减少。 调度信息可以包括资源块分配，采用的调制星座，采用的编码率，使用的功率电平和使用的预编码器矩阵索引。 此外，可以部分地通过专用参考符号层或导频流来传送调度信息。 此外，基站可以向MU-MIMO用户发送基站期望调度的用户总数或总用户数的上限的初步估计，以允许MU-MIMO用户确定 优选的预编码器矩阵索引和信道质量指标的指示。

公开(公告)号：US20120033756A1

公开(公告)日：2012-02-09

申请号：US13273880

申请日：2011-10-14

申请人： Mohammad A. Khojastepour ,  Xiaodong Wang ,  Mohammad Madihian

发明人： Mohammad A. Khojastepour ,  Xiaodong Wang ,  Mohammad Madihian

IPC分类号： H04L1/02

CPC分类号： H04W72/042 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0626 ,  H04B7/0639 ,  H04L1/0001 ,  H04L1/06

摘要： Multi-user (MU-) MIMO systems with quantized feedback are designed to maximize the sum-rate via scheduling and linear precoding. To maximize throughput over the network, quantized CSIT is sent through a low-rate feedback link feedback from a plurality of users back to a base station. The base station then determines a subset of the plurality of users to transmit one or more signals to based on the received feedback and determines a preceding matrix based on the received feedback from the plurality of users wherein the precoding matrix maximizes a sum-rate throughput for the subset of the plurality of users. Additionally, based on the received feedback, the base station designs a quantization codebook. This codebook may be designed off-line and/or online. The codebook and/or precoding matrix are used to transmit signals to the users.

摘要翻译： 设计了具有量化反馈的多用户（MU-）MIMO系统，以通过调度和线性预编码来最大化总和速率。 为了使网络上的吞吐量最大化，量化的CSIT通过从多个用户返回到基站的低速率反馈链路反馈发送。 基站然后基于所接收的反馈确定多个用户的子集以发送一个或多个信号，并且基于来自多个用户的接收到的反馈来确定先前的矩阵，其中预编码矩阵使和速率吞吐量最大化 多个用户的子集。 另外，基于接收到的反馈，基站设计量化码本。 该码本可以离线和/或在线设计。 码本和/或预编码矩阵用于向用户发送信号。

公开(公告)号：US08098631B2

公开(公告)日：2012-01-17

申请号：US12047555

申请日：2008-03-13

申请人： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

发明人： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC分类号： H04W4/00

CPC分类号： H04W88/06 ,  H04W4/06 ,  H04W24/00 ,  H04W84/042

摘要： The invention is a method directed to group MMSE-DFD with rate (SINR) feedback and without pre-determined decoding order for reception on a cellular downlink. The method includes initializing channel matrix estimates and inner codes of all co-channel transmitter sources in a wireless network. Each channel matrix estimate is converted into an effective channel matrix responsive to the inner code of the corresponding transmitter source; The channel estimates or the inner codes or the modulation and coding schemes are not known for some of the transmitter sources whose transmitted signals are consequently treated as interference and deemed un-decodable.

摘要翻译： 本发明是一种针对具有速率（SINR）反馈的组MMSE-DFD并且在蜂窝下行链路上没有用于接收的预定解码顺序的方法。 该方法包括在无线网络中初始化信道矩阵估计和所有同信道发射机源的内部码。 响应于相应的发射机源的内部码，每个信道矩阵估计被转换成有效的信道矩阵; 信道估计或内码或调制和编码方案对于其发射信号因此被视为干扰并被认为是不可解码的一些发射机源是未知的。

公开(公告)号：US20110246848A1

公开(公告)日：2011-10-06

申请号：US13023667

申请日：2011-02-09

申请人： Guosen Yue ,  Momin A. Uppal ,  Xiaodong Wang

发明人： Guosen Yue ,  Momin A. Uppal ,  Xiaodong Wang

IPC分类号： H04L1/08 ,  H03M13/05 ,  G06F11/10 ,  G06F11/14

CPC分类号： H04L1/0045 ,  H03M13/3723 ,  H03M13/3761 ,  H03M13/6306 ,  H04L1/1819

摘要： Methods and systems for doped rateless retransmission include receiving ratelessly coded symbols. An attempt is made to decode the coded symbols using a processor by creating an associated code graph that represents the structure of the rateless code used by the symbols. If the decoding attempt fails, an input node is selected from the code graph using a metric that gauges the number and degree of connections to the input node based on the code graph structure. The selected input node is then requested for retransmission of the selected input node by a feedback channel.

摘要翻译： 用于掺杂无错重传的方法和系统包括接收无编码符号。 尝试使用处理器来解码编码符号，通过创建代表由符号使用的无码代码的结构的相关联的代码图。 如果解码尝试失败，则使用使用基于代码图结构来衡量与输入节点的连接的数量和程度的度量从代码图中选择输入节点。 然后通过反馈信道请求所选择的输入节点来重传所选择的输入节点。

公开(公告)号：US08023581B2

公开(公告)日：2011-09-20

申请号：US11857269

申请日：2007-09-18

申请人： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

发明人： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC分类号： H04L23/02 ,  H04L27/06

CPC分类号： H04L1/0054 ,  H04L25/03203 ,  H04L25/03286 ,  H04L25/03305

摘要： A method includes the steps of i) listing out all possibilities for a first symbol of a two stream signal; ii) determining a second symbol of the two stream signal for each of the first symbol listed out, iii) evaluating a metric for each of the first symbol and second symbol pair, iv) listing out all possibilities for second symbol, v) determining a first symbol for each choice of the second symbol listed out, vi) evaluating a metric for each of the second symbol and first symbol pair, vii) determining an exact maximum log likelihood ratio for all bits using the metrics, and viii) decoding codeword(s) in the two stream signal using the determined exact maximum log likelihood ratio for all bits.

摘要翻译： 一种方法包括以下步骤：i）列出两个流信号的第一符号的所有可能性; ii）确定所列出的第一符号中的每一个的两个流信号的第二符号，iii）评估第一符号和第二符号对中的每一个的度量，iv）列出第二符号的所有可能性，v）确定 vi）对所述第二符号和第一符号对中的每个符号对的每一个的度量进行评估，vii）使用所述度量确定所有比特的精确最大对数似然比，以及viii）解码码字（ s）在两个流信号中，使用所确定的所有比特的精确最大对数似然比。

公开(公告)号：US07960594B2

公开(公告)日：2011-06-14

申请号：US12734601

申请日：2008-10-31

申请人： Tao Zhang ,  Mingyuan Zheng ,  Na Ji ,  Aigin Wang ,  Yuying Shu ,  Hui Wang ,  Xiaodong Wang ,  Jingguang Chen

发明人： Tao Zhang ,  Mingyuan Zheng ,  Na Ji ,  Aigin Wang ,  Yuying Shu ,  Hui Wang ,  Xiaodong Wang ,  Jingguang Chen

IPC分类号： C07C29/00

CPC分类号： C07C29/00 ,  B01J21/063 ,  B01J21/18 ,  B01J23/652 ,  B01J23/6527 ,  B01J23/85 ,  B01J23/888 ,  B01J27/19 ,  B01J27/22 ,  B01J27/25 ,  Y02P20/52 ,  C07C31/202

摘要： A method for preparing ethylene glycol from cellulose uses the cellulose as the feed for the reaction. The cellulose conversion is performed over catalysts which are composed of the metallic state, carbides, nitrides, or phosiphides of molybdenum or tungsten, and metallic cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum of the group 8, 9, or 10 transition metals. The catalytic conversion of cellulose is conducted at 120 to 300° C. and hydrogen pressure 1 to 12 MPa under the hydrothermal conditions to achieve the high efficiency, high selectivity, and high yield of ethylene glycol. Compared to the existing method of preparing ethylene glycol from ethylene, the method, using the renewable raw material for the reaction, is friendly to the environment, and has high atom economy.

摘要翻译： 从纤维素制备乙二醇的方法使用纤维素作为反应的进料。 纤维素转化在由金属状态，碳化物，氮化物或钼或钨的高温以及金属钴，镍，钌，铑，钯，铱和铂组成的催化剂上进行，第8,9或9族 10个过渡金属。 在水热条件下，纤维素的催化转化率为120〜300℃，氢压为1〜12MPa，达到乙二醇的高效率，高选择性和高产率。 与从乙烯制备乙二醇的现有方法相比，使用可再生原料进行反应的方法对环境友好，原子经济性好。