公开(公告)号：US20100074358A1

公开(公告)日：2010-03-25

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: H04L1/02

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观测生成矩阵，对该信道进行建模，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：US20100064166A1

公开(公告)日：2010-03-11

申请号：US12511126

申请日：2009-07-29

Applicant: Cezary Dubnicki ,  Cristian Ungureanu

Inventor： Cezary Dubnicki ,  Cristian Ungureanu

IPC: G06F11/20 ,  G06F12/16

CPC classification number: G06F17/30067 ,  G06F11/14

Abstract: Exemplary systems and methods in accordance with embodiments of the present invention may provide a plurality of data services by employing splittable, mergable and transferable redundant chains of data containers. The chains and containers may be automatically split and/or merged in response to changes in storage node network configurations and may be stored in erasure coded fragments distributed across different storage nodes. Data services provided in a distributed secondary storage system utilizing redundant chains of containers may include global deduplication, dynamic scalability, support for multiple redundancy classes, data location, fast reading and writing of data and rebuilding of data due to node or disk failures.

Abstract translation: 根据本发明的实施例的示例性系统和方法可以通过使用可拆分的，可合并且可传输的数据容器的冗余链来提供多个数据服务。 链和容器可以根据存储节点网络配置的变化自动分割和/或合并，并且可以存储在分布在不同存储节点上的擦除编码片段中。 使用冗余的容器链的分布式二级存储系统中提供的数据服务可能包括全局重复数据删除，动态可扩展性，对多个冗余类的支持，数据位置，快速读取和写入数据以及由于节点或磁盘故障而重建数据。

公开(公告)号：US20100058475A1

公开(公告)日：2010-03-04

申请号：US12397041

申请日：2009-03-03

Applicant: Suresh Thummalapenta ,  Guofei Jiang ,  Sriram Sankaranarayanan ,  Franjo Ivancic

Inventor： Suresh Thummalapenta ,  Guofei Jiang ,  Sriram Sankaranarayanan ,  Franjo Ivancic

IPC: G06F15/18 ,  G06F11/00

CPC classification number: H04L63/1433 ,  G06F21/577

Abstract: Embodiments of the present invention combine static analysis, source code instrumentation and feedback-guided fuzz testing to automatically detect resource exhaustion denial of service attacks in software and generate inputs of coma for vulnerable code segments. The static analysis of the code highlights portions that are potentially vulnerable, such as loops and recursions whose exit conditions are dependent on user input. The code segments are dynamically instrumented to provide a feedback value at the end of each execution. Evolutionary techniques are then employed to search among the possible inputs to find inputs that maximize the feedback score.

Abstract translation: 本发明的实施例将静态分析，源代码仪表和反馈引导的模糊测试结合起来，自动检测软件中的资源耗尽拒绝服务攻击，并为脆弱的代码段生成昏迷的输入。 代码的静态分析突出显示可能易受攻击的部分，例如其退出条件取决于用户输入的循环和递归。 代码段被动态调整，以在每次执行结束时提供反馈值。 然后使用进化技术来搜索可能的输入以找到使反馈分数最大化的输入。

公开(公告)号：US20100054735A1

公开(公告)日：2010-03-04

申请号：US12388068

申请日：2009-02-18

Applicant: Wei Wei ,  Ting Wang ,  Chonggang Wang

Inventor： Wei Wei ,  Ting Wang ,  Chonggang Wang

IPC: H04B10/08 ,  H04J1/05

CPC classification number: H04J14/0282 ,  H04J14/0283 ,  H04J14/0298

Abstract: A system and method for dynamically allocating sub-carriers between the nodes of an optical OFDMA ring network or an OFDMA passive optical network. A carrier allocation system assigns sub-carriers according to a utility function based on real-time measurements of arrival data rates and queue length variance.

Abstract translation: 一种用于在光学OFDMA环形网络或OFDMA无源光网络的节点之间动态分配子载波的系统和方法。 载波分配系统根据到达数据速率和队列长度方差的实时测量，根据效用函数分配子载波。

公开(公告)号：US20100005041A1

公开(公告)日：2010-01-07

申请号：US12269380

申请日：2008-11-12

Applicant: Seongmoon Wang

Inventor： Seongmoon Wang

IPC: G06F15/18 ,  G06F17/50

CPC classification number: G01R31/2894 ,  G06N20/00

Abstract: A system and method for integrated circuit diagnosis includes partitioning an integrated circuit design into sub-regions according to a structure of the integrated circuit design. A decision function is generated for a sub-region by training a machine learning tool. A sequence of test patterns is applied to a device under test (DUT) to determine responses. If the DUT fails, all the decision functions are evaluated with the errors produced by the DUT. A sub-region whose decision function yielded a highest value is selected to find a defect sub-region in the DUT.

Abstract translation: 用于集成电路诊断的系统和方法包括根据集成电路设计的结构将集成电路设计分成子区域。 通过训练机器学习工具为子区域生成决策功能。 测试模式的序列被应用于被测器件（DUT）以确定响应。 如果DUT发生故障，则所有的判决功能都由DUT产生的错误进行评估。 选择其决策函数产生最高值的子区域以在DUT中找到缺陷子区域。

公开(公告)号：US20090304268A1

公开(公告)日：2009-12-10

申请号：US12478073

申请日：2009-06-04

Applicant: Srihari Cadambi ,  Igor Durdanovic ,  Venkata Jakkula ,  Eric Cosatto ,  Murugan Sankaradass ,  Hans Peter Graf ,  Srimat T. Chakradhar

Inventor： Srihari Cadambi ,  Igor Durdanovic ,  Venkata Jakkula ,  Eric Cosatto ,  Murugan Sankaradass ,  Hans Peter Graf ,  Srimat T. Chakradhar

IPC: G06K9/62 ,  G06K9/00

CPC classification number: G06N99/005

Abstract: A method system for training an apparatus to recognize a pattern includes providing the apparatus with a host processor executing steps of a machine learning process; providing the apparatus with an accelerator including at least two processors; inputting training pattern data into the host processor; determining coefficient changes in the machine learning process with the host processor using the training pattern data; transferring the training data to the accelerator; determining kernel dot-products with the at least two processors of the accelerator using the training data; and transferring the dot-products back to the host processor.

Abstract translation: 用于训练识别模式的装置的方法系统包括向所述装置提供执行机器学习过程的步骤的主机处理器; 向所述设备提供包括至少两个处理器的加速器; 将训练模式数据输入到主处理器中; 使用所述训练模式数据来确定主处理器在机器学习过程中的系数变化; 将训练数据传送到加速器; 使用所述训练数据确定具有所述加速器的所述至少两个处理器的内核点产品; 并将点产品传送回主机处理器。

公开(公告)号：US20090296650A1

公开(公告)日：2009-12-03

申请号：US12477255

申请日：2009-06-03

Applicant: Luca Venturino ,  Narayan Prasad ,  Xiaodong Wang

Inventor： Luca Venturino ,  Narayan Prasad ,  Xiaodong Wang

IPC: H04W72/04

CPC classification number: H04W16/28

Abstract: System and methods are disclosed for optimizing wireless communication for a plurality of mobile wireless devices. The system uses beamforming vectors or precoders having a structure optimal with respect to the weighted sum rate in a multi-cell orthogonal frequency division multiple access (OFDMA) downlink. A plurality of base stations communicate with the mobile devices and all base stations perform a distributed non-convex optimization exploiting the determined structure.

Abstract translation: 公开了用于优化多个移动无线设备的无线通信的系统和方法。 该系统在多小区正交频分多址（OFDMA）下行链路中使用具有关于加权和速率最优的结构的波束成形向量或预编码器。 多个基站与移动设备进行通信，并且所有基站使用所确定的结构来执行分布式非凸优化。

公开(公告)号：US20090290877A1

公开(公告)日：2009-11-26

申请号：US12124402

申请日：2008-05-21

Applicant: Jianjun Yu ,  Ting Wang ,  Junqiang Hu

Inventor： Jianjun Yu ,  Ting Wang ,  Junqiang Hu

IPC: H04J14/02

CPC classification number: H04B10/0795 ,  H04L27/2602

Abstract: A method includes coupling an optical signal upconverted to a higher frequency and a digital signal having a bit rate similar to that of a subchannel of the upconverted optical signal, and obtaining, responsive to the coupling, a transmission signal with an optical carrier frequency carrying the digital signal and subchannels about the optical carrier frequency carrying the upconverted optical signal, the bit rate of the optical carrier being similar to that of the subchannels. In a preferred embodiment, the coupling includes electrically power coupling the upconverted optical signal with the digital signal, and modulating the coupled optical carrier frequency carrying the digital signal and subchannels about the optical carrier frequency carrying the upconverted optical signal.

Abstract translation: 一种方法包括将上变频到较高频率的光信号和具有与上变频光信号的子信道的比特率相似的比特率的数字信号耦合，并且响应于耦合获得具有携带 关于携带上变频光信号的光载波频率的数字信号和子信道，光载波的比特率与子信道的比特率相似。 在优选实施例中，耦合包括将上变频的光信号与数字信号进行电功率耦合，以及调制载有数字信号的耦合的光载波频率和携带上变频的光信号的光载波频率的子信道。

公开(公告)号：US20090279891A1

公开(公告)日：2009-11-12

申请号：US12437706

申请日：2009-05-08

Applicant: Jianjun Yu

Inventor： Jianjun Yu

IPC: H04J14/06

CPC classification number: H04J14/06 ,  G02F1/3515 ,  G02F2002/006

Abstract: An apparatus includes a first laser source for providing a first lightwave; a first optical coupler that is polarization maintaining for dividing the first lightwave into first and second optical carrier lightwaves; first and second modulators for modulating respective ones of the first and second carrier lightwaves with information; a polarization beam combiner for combining the modulated first and second carrier lightwaves which generates a polarization multiplexing optical signal; second and third lasers for providing second and third lightwaves whose wavelengths are one of both longer than that of the first lightwave and shorter than that of the first lightwave, a second optical coupler that is polarization maintaining for combining the second and third lightwaves; and a third optical coupler for combining the modulated first and second carrier lightwaves from the polarization beam combiner and the combined second and third lightwaves out of the second optical coupler for transmission over an optical medium.

Abstract translation: 一种装置包括用于提供第一光波的第一激光源; 第一光耦合器，其是用于将第一光波分割成第一和第二光载波光的偏振保持; 第一和第二调制器，用于用信息调制第一和第二载波光波中的相应的一个; 偏振光束组合器，用于组合产生偏振复用光信号的调制的第一和第二载波光波; 第二和第三激光器，用于提供第二和第三光波，其波长比第一光波的波长都长于第一光波的波长，并且比第一光波的波长短;第二光耦合器，其是用于组合第二和第三光波的保持极化; 以及第三光耦合器，用于将来自偏振光束组合器的调制的第一和第二载波光波与第二光耦合器中的组合的第二和第三光波组合，以在光学介质上传输。

公开(公告)号：US07610540B2

公开(公告)日：2009-10-27

申请号：US12265300

申请日：2008-11-05

Applicant: Kedarnath Balakrishnan ,  Seongmoon Wang ,  Wenlong Wei ,  Srimat T. Chakradhar

Inventor： Kedarnath Balakrishnan ,  Seongmoon Wang ,  Wenlong Wei ,  Srimat T. Chakradhar

IPC: G06F11/00 ,  G06G7/58

CPC classification number: G01R31/31921

Abstract: Disclosed is a logic testing system that includes a decompressor and a tester in communication with the decompressor. The tester is configured to store a seed and locations of scan inputs and is further configured to transmit the seed and the locations of scan inputs to the decompressor. The decompressor is configured to generate a test pattern from the seed and the locations of scan inputs. The decompressor includes a first test pattern generator, a second test pattern generator, and a selector configured to select the test pattern generated by the first test pattern generator or the test pattern generated by the second test pattern generator using the locations of scan inputs.

Abstract translation: 公开了一种包括解压缩器和与解压缩器通信的测试器的逻辑测试系统。 测试器被配置为存储种子和扫描输入的位置，并且还被配置为将种子和扫描输入的位置传送到解压缩器。 解压缩器被配置为从种子和扫描输入的位置生成测试图案。 解压缩器包括第一测试图案发生器，第二测试图案发生器和被配置为选择由第一测试图案发生器生成的测试图案或由第二测试图案发生器使用扫描输入位置产生的测试图案的选择器。