Near optimal joint channel estimation and data detection for COFDM systems
    1.
    发明授权
    Near optimal joint channel estimation and data detection for COFDM systems 有权
    近COFDM系统的最优联合信道估计和数据检测

    公开(公告)号:US07940852B2

    公开(公告)日:2011-05-10

    申请号:US12315300

    申请日:2008-12-02

    IPC分类号: H04L5/12 H04L1/02

    CPC分类号: H04L25/0204 H04L27/2647

    摘要: A method for decoding a received signal comprising the steps of receiving a signal at a plurality of antennas, applying Fast Fourier transformations to the received signal, estimating channel characteristics of a channel over which the signal was transmitted using iterative processing and decoding the transformed signal.

    摘要翻译: 一种用于对接收信号进行解码的方法,包括以下步骤:在多个天线处接收信号,对接收到的信号应用快速傅立叶变换,使用迭代处理估计发送信号的信道的信道特性并解码变换后的信号。

    Method for near optimal joint channel estimation and data detection for COFDM systems
    2.
    发明授权
    Method for near optimal joint channel estimation and data detection for COFDM systems 有权
    COFDM系统接近最佳联合信道估计和数据检测方法

    公开(公告)号:US07099413B2

    公开(公告)日:2006-08-29

    申请号:US09774875

    申请日:2001-02-01

    IPC分类号: H04B7/08

    CPC分类号: H04L25/0204 H04L27/2647

    摘要: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative forward processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

    摘要翻译: 提出了编码正交频分复用(COFDM)系统的联合信道估计和最大似然解码方法。 使用这种方法结合卷积编码,可以在快速色散衰落通道中实现鲁棒和近似最佳的相干检测。 在具有激进频率重用的系统中实现了分组数据吞吐量的显着性能增益。 一种用于估计多载波传输系统中的信道特性的方法,包括以下步骤:接收多载波信号,对所述多载波信号应用快速傅立叶变换,使用迭代前向处理的组合估计多载波信号在其上传输的信道特性 并进行迭代反向处理,并对变换后的多载波信号进行解码。

    Method for near optimal joint channel estimation and data detection for COFDM systems
    3.
    发明授权
    Method for near optimal joint channel estimation and data detection for COFDM systems 有权
    COFDM系统接近最佳联合信道估计和数据检测方法

    公开(公告)号:US07460620B2

    公开(公告)日:2008-12-02

    申请号:US11240228

    申请日:2005-09-30

    IPC分类号: H04L27/06 H04L5/12

    CPC分类号: H04L25/0204 H04L27/2647

    摘要: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

    摘要翻译: 提出了编码正交频分复用(COFDM)系统的联合信道估计和最大似然解码方法。 使用这种方法结合卷积编码,可以在快速色散衰落通道中实现鲁棒和近似最佳的相干检测。 在具有激进频率重用的系统中实现了分组数据吞吐量的显着性能增益。 一种用于估计多载波传输系统中的信道特性的方法,包括以下步骤:接收多载波信号,对所述多载波信号应用快速傅里叶变换,使用迭代处理和迭代处理的组合估计多载波信号的传输的信道特性, 呈现迭代反向处理和解码变换后的多载波信号。

    System for near optimal joint channel estimation and data detection for COFDM systems

    公开(公告)号:US06477210B2

    公开(公告)日:2002-11-05

    申请号:US09774802

    申请日:2001-02-01

    IPC分类号: H03D100

    CPC分类号: H04L27/2647 H04L25/0204

    摘要: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A system for estimating channel characteristics in a multicarrier transmission system comprising means for receiving a multicarrier signal, means for applying Fast Fourier transformations to the multicarrier signal, means for estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using iterative processing and means for decoding the transformed multicarrier signal is presented.

    Method for near optimal joint channel estimation and data detection for COFDM systems

    公开(公告)号:US20090080575A1

    公开(公告)日:2009-03-26

    申请号:US12315300

    申请日:2008-12-02

    IPC分类号: H04L27/06

    CPC分类号: H04L25/0204 H04L27/2647

    摘要: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

    MANAGING JOB STATUS
    6.
    发明申请
    MANAGING JOB STATUS 有权
    管理工作状态

    公开(公告)号:US20150134695A1

    公开(公告)日:2015-05-14

    申请号:US14539072

    申请日:2014-11-12

    IPC分类号: G06F17/30 H04L29/08

    摘要: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for job management. One of the methods includes receiving a status report for each of a plurality of jobs from a pluggable status reporter. The jobs are executed by applications in a distributed computing system. The applications are developed in at least two different software frameworks. A job type for each job is determined. A specific status handler associated with the job type is selected to determine specified status information for the job. The specified status information is stored and associated with the job in a status database.

    摘要翻译: 方法,系统和装置,包括在计算机存储介质上编码的计算机程序,用于作业管理。 其中一种方法包括从可插拔状态报告器接收针对多个作业中的每一个的状态报告。 这些作业由分布式计算系统中的应用程序执行。 应用程序至少在两个不同的软件框架中开发。 确定每个作业的作业类型。 选择与作业类型相关联的特定状态处理程序以确定作业的指定状态信息。 指定的状态信息被存储并与状态数据库中的作业相关联。

    MONOLITHIC FOLDED F-P CAVITY AND SEMICONDUCTOR LASER USING THE SAME
    8.
    发明申请
    MONOLITHIC FOLDED F-P CAVITY AND SEMICONDUCTOR LASER USING THE SAME 有权
    使用相同的单晶折叠F-P孔和半导体激光

    公开(公告)号:US20110032961A1

    公开(公告)日:2011-02-10

    申请号:US12865965

    申请日:2009-01-22

    摘要: This invention relates to a monolithic folded F-P cavity used for semiconductor laser, which is composed of a monolithic optical element. The monolithic optical element is made of the material having low propagation loss for a certain spectrum range. Light entering through an input/output coupling surface of the monolithic optical element is reflected several times between the input/output coupling surface and at least two high reflection surfaces within the monolithic optical element, and then at least one part of the light exits through the input/output coupling surface along the path which is collinear with the incident light but in an opposite direction. By means of integrating reflecting and coupling parts of the folded F-P cavity within a single monolithic optical material, this invention greatly improves the reliability of the F-P cavity, and has other advantages, such as insensitive to outside interferences, smaller size, simpler structure and easy usage. A semiconductor laser using the monolithic folded F-P cavity is also provided.

    摘要翻译: 本发明涉及由单片光学元件组成的用于半导体激光器的单片折叠F-P腔。 单片光学元件由在一定光谱范围内具有低传播损耗的材料制成。 通过单片光学元件的输入/输出耦合表面进入的光在输入/输出耦合表面与单片光学元件内的至少两个高反射表面之间反射若干次,然后光的至少一部分通过 沿着与入射光共线但沿相反方向的路径的输入/输出耦合表面。 通过将折叠FP腔的反射和耦合部分集成在单个单片光学材料内,本发明大大提高了FP腔的可靠性,并且具有其他优点,如对外部干扰不敏感,尺寸更小,结构更简单,容易 用法。 还提供了使用单片折叠F-P腔的半导体激光器。

    MIMO OFDM system
    9.
    发明授权
    MIMO OFDM system 有权
    MIMO OFDM系统

    公开(公告)号:US07643404B2

    公开(公告)日:2010-01-05

    申请号:US11380531

    申请日:2006-04-27

    IPC分类号: H04J11/00

    CPC分类号: H04L27/2601 H04L1/0618

    摘要: A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

    摘要翻译: MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中,可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。

    Hot-Spot Wireless Access Exploiting Shadowing Diversity of Distributed Antennas
    10.
    发明申请
    Hot-Spot Wireless Access Exploiting Shadowing Diversity of Distributed Antennas 失效
    热点无线接入利用分布式天线的阴影多样性

    公开(公告)号:US20090247067A1

    公开(公告)日:2009-10-01

    申请号:US12058954

    申请日:2008-03-31

    申请人: Ye Li Jinyun Zhang

    发明人: Ye Li Jinyun Zhang

    IPC分类号: H04B7/14

    CPC分类号: H04W52/46

    摘要: The embodiments of the invention describe method and system for maximizing capacity of a distributed antenna system. A relaying antenna is selected to maximize a signal-to-leakage ratio (SLR) ratio of the distributed antenna system. Further, the capacity of the system is improved by allocating a signal power based on a pseudo-capacity criterion such that an average pseudo capacity of the distributed antenna system is maximized.

    摘要翻译: 本发明的实施例描述了用于最大化分布式天线系统的容量的方法和系统。 选择中继天线以最大化分布式天线系统的信噪比(SLR)。 此外,通过基于伪容量标准分配信号功率来提高系统的容量,使得分布式天线系统的平均伪容量最大化。