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。

公开(公告)号：US08588623B2

公开(公告)日：2013-11-19

申请号：US12860659

申请日：2010-08-20

Applicant: Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H04B10/06

CPC classification number: H04L25/03171 ,  H04B10/532 ,  H04B10/6971 ,  H04J14/002 ,  H04J14/06 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/3405

Abstract: Systems and methods for optical communication that use a transmitter/receiver. The systems and methods include receiving a modulated, encoded input stream. Channel memory is reduced using coarse digital backpropagation and other channel impairments are removed using turbo equalization. Symbols are detected in the input stream that conform to a non-uniform, polar constellation having a Gaussian source distribution to produce a stream of encoded data. The stream of encoded data is decoded with one or more low density parity check (LDPC) decoders.

Abstract translation: 使用发射机/接收机的光通信系统和方法。 系统和方法包括接收经调制的编码的输入流。 使用粗数字反向传播减少信道存储，并且使用turbo均衡消除其他信道损伤。 在符合具有高斯源分布的非均匀极坐标的输入流中检测符号以产生编码数据流。 编码数据流用一个或多个低密度奇偶校验（LDPC）解码器解码。

公开(公告)号：US08583896B2

公开(公告)日：2013-11-12

申请号：US12843579

申请日：2010-07-26

Applicant: Srihari Cadambi ,  Abhinandan Majumdar ,  Michela Becchi ,  Srimat Chakradhar ,  Hans Peter Graf

Inventor： Srihari Cadambi ,  Abhinandan Majumdar ,  Michela Becchi ,  Srimat Chakradhar ,  Hans Peter Graf

IPC: G06F15/80

CPC classification number: G06F15/7821 ,  G06N3/063 ,  G06N99/005

Abstract: Systems and methods for massively parallel processing on an accelerator that includes a plurality of processing cores. Each processing core includes multiple processing chains configured to perform parallel computations, each of which includes a plurality of interconnected processing elements. The cores further include multiple of smart memory blocks configured to store and process data, each memory block accepting the output of one of the plurality of processing chains. The cores communicate with at least one off-chip memory bank.

Abstract translation: 在包括多个处理核心的加速器上进行大规模并行处理的系统和方法。 每个处理核心包括配置成执行并行计算的多个处理链，每个处理链包括多个互连处理元件。 核心还包括配置为存储和处理数据的多个智能存储器块，每个存储块接受多个处理链之一的输出。 内核与至少一个片外存储体通信。

公开(公告)号：US08582807B2

公开(公告)日：2013-11-12

申请号：US12790979

申请日：2010-05-31

Applicant: Ming Yang ,  Shenghuo Zhu ,  Fengjun Lv ,  Kai Yu

Inventor： Ming Yang ,  Shenghuo Zhu ,  Fengjun Lv ,  Kai Yu

IPC: G06K9/00

CPC classification number: G06K9/00248 ,  G06K9/4628 ,  G06K2009/00322

Abstract: Systems and methods are disclosed for determining personal characteristics from images by generating a baseline gender model and an age estimation model using one or more convolutional neural networks (CNNs); capturing correspondences of faces by face tracking, and applying incremental learning to the CNNs and enforcing correspondence constraint such that CNN outputs are consistent and stable for one person.

Abstract translation: 公开了用于通过生成基线性别模型和使用一个或多个卷积神经网络（CNN）的年龄估计模型来确定来自图像的个人特征的系统和方法; 通过面部跟踪获取面部对应关系，并将增量学习应用于CNN，并执行对应约束，使得CNN输出对于一个人来说是一致和稳定的。

公开(公告)号：US08582769B2

公开(公告)日：2013-11-12

申请号：US12846915

申请日：2010-07-30

Applicant: Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

Inventor： Yi Zhao ,  Martin Roetteler ,  Lei Xu ,  Ting Wang

IPC: H04K1/00

CPC classification number: H04L9/0852

Abstract: Systems and methods to communicate securely includes communicating quantum encryption data on a first wavelength-division multiplexing passive optical network (WDM-PON); and communicating data over separate classical channels of a second WDM-PON, wherein the second WDM-PON synchronizes with the first WDM-PON while providing data communication over the classical channels.

Abstract translation: 用于安全通信的系统和方法包括在第一波分复用无源光网络（WDM-PON）上传送量子加密数据; 以及在第二WDM-PON的单独的经典信道上传送数据，其中所述第二WDM-PON与所述第一WDM-PON同步，同时在经典信道上提供数据通信。

公开(公告)号：US20130290936A1

公开(公告)日：2013-10-31

申请号：US13873610

申请日：2013-04-30

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Junghwan Rhee ,  Hui Zhang ,  Nipun Arora ,  Guofei Jiang ,  Kenji Yoshihira ,  Myoungku Song

IPC: G06F11/36

CPC classification number: G06F11/3636 ,  G06F11/3604

Abstract: A system for automatically instrumenting and tracing an application program and related software components achieves a correlated tracing of the program execution. It includes tracing of endpoints that are the set of functions in the program execution path that the developers are interested. The tracing endpoints and related events become the total set of functions to be traced in the program (called instrument points). This invention automatically analyzes the program and generates such instrumentation points to enable correlated tracing. The generated set of instrumentation points addresses common questions that developers ask when they use monitoring tools.

Abstract translation: 用于自动测试和跟踪应用程序和相关软件组件的系统实现了程序执行的相关跟踪。 它包括跟踪开发人员感兴趣的程序执行路径中的一组函数的端点。 跟踪终点和相关事件成为程序中要追踪的功能的总数（称为仪器点）。 本发明自动分析程序并生成这样的仪器点以实现相关跟踪。 生成的仪器仪表组解决了开发人员在使用监控工具时所要求的常见问题。