公开(公告)号：US08660598B2

公开(公告)日：2014-02-25

申请号：US12941575

申请日：2010-11-08

Applicant: Narayan Prasad ,  Kishore Ramachandran ,  Sampath Rangarajan

Inventor： Narayan Prasad ,  Kishore Ramachandran ,  Sampath Rangarajan

IPC: H04B7/00 ,  H04B15/00

CPC classification number: H04B7/0408 ,  H04B1/1027 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088

Abstract: Methods and systems for enabling the rectification of deteriorated channel conditions on a communication link are described. In particular, the methods and systems can employ mechanisms that prioritize beams in accordance with signal quality measures, direction of departures of transmission beams and/or direction of arrivals of reception beams to address variable channel conditions.

Abstract translation: 描述了能够在通信链路上整流恶化的信道条件的方法和系统。 特别地，方法和系统可以采用根据信号质量测量，发射波束的偏离方向和/或接收波束的到达方向对波束进行优先化的机制，以解决可变信道条件。

公开(公告)号：US20140050391A1

公开(公告)日：2014-02-20

申请号：US13858044

申请日：2013-04-06

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Anelia Angelova ,  Shenghuo Zhu ,  Yuanqing Lin

IPC: G06K9/62

CPC classification number: G06K9/6267 ,  G06K9/00624 ,  G06T7/11 ,  G06T7/194 ,  G06T2207/10004 ,  G06T2207/20084 ,  G06T2207/30188

Abstract: A method for fine-grained image classification on an image includes automatically segmenting one or more objects of interest prior to classification; and combining segmented and original image features before performing final classification.

Abstract translation: 用于图像上的细粒度图像分类的方法包括在分类之前自动分割一个或多个感兴趣对象; 并在执行最终分类之前组合分段和原始图像特征。

公开(公告)号：US20140044061A1

公开(公告)日：2014-02-13

申请号：US13948409

申请日：2013-07-23

Applicant: NEC Laboratories America, Inc.

Inventor： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

IPC: H04W72/04

CPC classification number: H04J11/0053 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0068 ,  H04L1/0077 ,  H04L5/0035 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/0073 ,  H04L5/0091 ,  H04W24/10 ,  H04W72/042

Abstract: A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system is disclosed. The communications method comprises transmitting, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping, and transmitting, to the UE, one of the four indicators, each of which is conveyed in 2 bits, wherein the four indicators comprises ‘00’, ‘01’, ‘10’, and ‘11’ corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively. Other methods, apparatuses, and systems are also disclosed.

Abstract translation: 公开了在协调多点发送和接收（CoMP）系统中使用的传输点（TP）中实现的通信方法。 所述通信方法包括：向用户设备（UE）发送最多指示至少物理下行链路共享信道（PDSCH）资源元素（RE）映射的四个指示符的属性，并向所述UE发送所述四个指示符之一， 其中每一个以2位传送，其中四个指示符包括对应于第一组，第二组，第三组和第四组参数的“00”，“01”，“10”和“11” ， 分别。 还公开了其它方法，装置和系统。

公开(公告)号：US08643656B2

公开(公告)日：2014-02-04

申请号：US13227865

申请日：2011-09-08

Applicant: Dong Li ,  Surendra Byna ,  Srimat Chakradhar

Inventor： Dong Li ,  Surendra Byna ,  Srimat Chakradhar

IPC: G06F15/00 ,  G06T1/00 ,  G06F9/46

CPC classification number: G06F9/4893 ,  G06F1/329 ,  Y02D10/24

Abstract: A method includes configuring a shared library, stored in a memory, to be loaded into applications to intercept graphics processing unit (GPU) computation requests for different types of workload kernals corresponding to the applications. The method further includes generating a power prediction and a performance prediction for at least one candidate kernel combination for execution on a GPU responsive to the GPU computations requests. The at least one candidate kernel combination pertains to at least two of the workload kernals. The method also includes rendering a decision of whether to execute the at least one candidate kernel combination or to execute the at least two of the workload kernals pertaining thereto separately, based on the power prediction and the performance prediction.

Abstract translation: 一种方法包括配置存储在存储器中的共享库，以被加载到应用程序中以拦截对应于应用的不同类型的工作负载的图形处理单元（GPU）计算请求。 该方法还包括响应于GPU计算请求，在至少一个候选内核组合上生成用于在GPU上执行的功率预测和性能预测。 至少一个候选内核组合属于至少两个工作负载内核。 该方法还包括基于功率预测和性能预测来呈现是否执行至少一个候选内核组合或者分别执行属于其的工作负载内核中的至少两个。

公开(公告)号：US20140006383A1

公开(公告)日：2014-01-02

申请号：US13890359

申请日：2013-05-09

Applicant: Vahit Hakan Hacigumus ,  Jagan Sankaranarayanan ,  Jeffrey LeFevre ,  Junichi Tatemura ,  Neoklis Polyzotis

Inventor： Vahit Hakan Hacigumus ,  Jagan Sankaranarayanan ,  Jeffrey LeFevre ,  Junichi Tatemura ,  Neoklis Polyzotis

IPC: G06F17/30

CPC classification number: G06F17/30448 ,  G06F17/30457 ,  G06F17/30463 ,  G06F17/30471

Abstract: A system for evolutionary analytics supports three dimensions (analytical workflows, the users, and the data) by rewriting workflows to be more efficient by using answers materialized as part of previous workflow execution runs in the system.

Abstract translation: 用于进化分析的系统通过使用作为系统中以前的工作流执行运行的一部分实现的答案，将工作流重写为更有效率，从而支持三维（分析工作流程，用户和数据）。

公开(公告)号：US08619918B2

公开(公告)日：2013-12-31

申请号：US12395679

申请日：2009-03-01

Applicant: Mohammad A. Khojastepour ,  Krishna S. Gomadam

Inventor： Mohammad A. Khojastepour ,  Krishna S. Gomadam

IPC: H04L27/06

CPC classification number: H04L25/0204 ,  H04L25/022 ,  H04L25/0224

Abstract: A method for sparse channel estimation in MIMO OFDM systems with a plurality of subchannels having the same sparsity structure is presented. The inventive method comprises initializing a plurality of residual vectors and observation generating matrices modeling the channel, sending a pilot signal for each subcarrier, converting the pilot signals to tap positions, detecting an optimal tap position, updating the residual vectors by removing the one residual vector having the optimal tap position, updating the generating matrices in accordance with the optimal residual vector, calculating weighted residuals based on the updated residual vectors, and repeating the steps, except initializing, until a stopping condition is met, wherein the updated observation matrices estimate the sparse channel. In one embodiment, the observation generating matrices are omitted. In one embodiment, multiple vectors are removed during one iteration. Pilot placement and pilot allocation techniques are presented to optimize the method.

Abstract translation: 提出了具有相同稀疏结构的多个子信道的MIMO OFDM系统中稀疏信道估计的方法。 本发明的方法包括：初始化多个残差向量和建立该信道的观测生成矩阵，为每个子载波发送导频信号，将导频信号转换成抽头位置，检测最佳抽头位置，通过去除一个残差向量来更新残差向量 具有最佳抽头位置，根据最佳残差矢量更新生成矩阵，基于更新后的残差向量计算加权残差，并重复除了初始化之外的步骤，直到满足停止条件为止，其中更新后的观测矩阵估计 稀疏频道 在一个实施例中，省略观察生成矩阵。 在一个实施例中，在一次迭代期间移除多个向量。 提出了试点布置和导频分配技术，以优化方法。

公开(公告)号：US08615047B2

公开(公告)日：2013-12-24

申请号：US13194132

申请日：2011-07-29

Applicant: Mohammad A. Khojastepour ,  Sampath Rangarajan

Inventor： Mohammad A. Khojastepour ,  Sampath Rangarajan

IPC: H04L27/00

CPC classification number: H04B7/0617 ,  H04B7/0626 ,  H04B7/0632

Abstract: Beamforming systems and methods are disclosed. In accordance with one method, an optimization problem that is based on channel matrices for a plurality of receivers is solved to obtain corresponding multipliers for each of the channel matrices. In addition, a determination of whether a maximum eigenvalue of a particular matrix that is based on the channel matrices and the multipliers has a multiplicity of one is made. Further, the method includes applying an eigenvector of the particular matrix for the maximum eigenvalue as a beamforming matrix to data symbols if the maximum eigenvalue has a multiplicity of one. Moreover, data signals are transmitted to the receivers in accordance with the beamforming matrix.

Abstract translation: 公开了波束形成系统和方法。 根据一种方法，解决了基于多个接收机的信道矩阵的优化问题，以获得每个信道矩阵的相应乘法器。 此外，确定基于信道矩阵和乘法器的特定矩阵的最大特征值是否具有多重性。 此外，该方法包括将最大特征值的特定矩阵的特征向量作为波束成形矩阵应用于数据符号，如果最大特征值具有多个1。 此外，根据波束形成矩阵将数据信号发送到接收机。

公开(公告)号：US08611293B2

公开(公告)日：2013-12-17

申请号：US13029726

申请日：2011-02-17

Applicant: Yan Xin ,  Guosen Yue

Inventor： Yan Xin ,  Guosen Yue

IPC: H04W4/00

CPC classification number: H04W72/02 ,  H04W24/00 ,  H04W28/18 ,  Y02D70/00

Abstract: Methods and systems for cognitive radio channel searching are shown that include determining an energy detection threshold and a number of samples that will find a free channel in a minimum searching time, based on a number of channels K and a channel occupancy probability π0, constrained by a target acceptable misdetection probability and a target acceptable false alarm probability. The search includes an energy detection threshold and a number of samples that will find a free channel in a minimum average searching time. The K channels are searched with a signaling device using the determined energy detection threshold and the determined number of samples to find a free channel.

Abstract translation: 示出了用于认知无线电信道搜索的方法和系统，其包括基于信道数目K和信道占用概率pi0来确定在最小搜索时间内将找到空闲信道的能量检测阈值和数量的样本数， 目标可接受的误检概率和目标可接受的误报概率。 搜索包括能量检测阈值和将在最小平均搜索时间内找到空闲频道的样本数。 使用确定的能量检测阈值和所确定的样本数量来搜索K个信道，使用信令装置来搜索自由信道。

公开(公告)号：US20130329823A1

公开(公告)日：2013-12-12

申请号：US13952160

申请日：2013-07-26

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Ali Khojastepour

IPC: H04B7/04

CPC classification number: H04B7/0617 ,  H04B7/04 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0486 ,  H04W52/42 ,  H04W88/02 ,  H04W88/08

Abstract: A method of precoding implemented in a base station used in a wireless communications system having codebooks for multiple transmission ranks is disclosed. The method includes precoding data in one or more layers with a precoding matrix obtained from one of the codebooks, and transmitting the precoded data to a user equipment, wherein entries of said one of the codebooks are accessed through a first description and a second description, wherein the precoding matrix is determined according to the first description and the second description, which are unique to the precoding matrix, and wherein the second description provides a finer description of said one of the codebooks than the first description. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在具有用于多个传输等级的码本的无线通信系统中使用的基站中实现的预编码方法。 该方法包括利用从码本之一获得的预编码矩阵对一个或多个层中的数据进行预编码，并将预编码数据发送到用户设备，其中通过第一描述和第二描述来访问所述码本之一的条目， 其中所述预编码矩阵根据所述预编码矩阵唯一的所述第一描述和所述第二描述来确定，并且其中所述第二描述提供比所述第一描述的所述码本中的所述一个的更精细的描述。 还公开了其它方法，系统和装置。

公开(公告)号：US08594248B2

公开(公告)日：2013-11-26

申请号：US12940761

申请日：2010-11-05

Applicant: Mohammad A. Khojastepour ,  Sampath Rangarajan

Inventor： Mohammad A. Khojastepour ,  Sampath Rangarajan

IPC: H04L27/06

CPC classification number: H04L27/28 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/30

Abstract: Methods and systems for reversing indexing signal option selections are disclosed. The signal options can be any of a variety of options that permit the establishment of a communication link, including modulation format, coding rate, precoding index and assigned subbands. The selected options can be represented as a vector and the index can be determined by employing a worth function for a particular selected vector element that is dependent on a selection occurrence count of the element and on an element position count of the element. In particular, the index can be the summation of worth function values for each selected element.

Abstract translation: 公开了用于反转索引信号选项选择的方法和系统。 信号选项可以是允许建立通信链路的各种选项中的任一种，包括调制格式，编码率，预编码索引和分配的子带。 所选择的选项可以被表示为向量，并且可以通过对依赖于元素的选择发生次数和元素的元素位置计数的特定选定向量元素采用值函数来确定索引。 特别地，索引可以是每个选定元素的值函数值的总和。