Method and apparatus for estimating a signal sequence in a MIMO-OFDM mobile communication system
    1.
    发明授权
    Method and apparatus for estimating a signal sequence in a MIMO-OFDM mobile communication system 有权
    用于估计MIMO-OFDM移动通信系统中的信号序列的方法和装置

    公开(公告)号:US07333549B2

    公开(公告)日:2008-02-19

    申请号:US10756073

    申请日:2004-01-12

    IPC分类号: H04L27/28

    摘要: A apparatus and method for estimating a sequence of transmitted quadrature amplitude modulation (QAM)-modulated signals and space-time block coded signals using an optimal expectation-maximization (EM)-based iterative estimation algorithm in a multiple-input and multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) mobile communication system. An initial sequence estimation value is produced on the basis of a predetermined initial value using a pilot sub-carrier contained in each of OFDM signals received by a receiving side. A normalized value of a received signal on a channel-by-channel basis is produced by a predetermined equation using orthogonality between the OFDM signals received by the receiving side. At least one subsequent sequence estimation value is produced using the initial sequence estimation value and the normalized value of the received signal on the channel-by-channel basis. If the subsequent sequence estimation value converges to a constant value after an operation of producing the subsequent sequence estimation value is iterated the predetermined number of times, the converged subsequent sequence estimation value is designated as a final sequence estimation value.

    摘要翻译: 一种用于在多输入和多输出中使用最佳期望最大化(EM)的迭代估计算法来估计发送的正交幅度调制(QAM)调制信号和时空块编码信号的序列的装置和方法 MIMO) - 正交频分复用(OFDM)移动通信系统。 使用包含在由接收侧接收的每个OFDM信号中的导频子载波,基于预定初始值产生初始序列估计值。 通过使用由接收侧接收的OFDM信号之间的正交性的预定方程式,在逐个信道的基础上产生接收信号的归一化值。 使用初始序列估计值和逐个信道的接收信号的归一化值来产生至少一个后续序列估计值。 如果后续序列估计值在产生后续序列估计值的操作被迭代预定次数之后收敛到常数值,则将收敛后续序列估计值指定为最终序列估计值。

    APPARATUS FOR PREVENTING CORROSION OF IF CONNECTOR IN PORTABLE TERMINAL AND METHOD THEREOF
    2.
    发明申请
    APPARATUS FOR PREVENTING CORROSION OF IF CONNECTOR IN PORTABLE TERMINAL AND METHOD THEREOF 审中-公开
    防止连接器在便携式终端中的腐蚀的装置及其方法

    公开(公告)号:US20130043739A1

    公开(公告)日:2013-02-21

    申请号:US13562239

    申请日:2012-07-30

    IPC分类号: H01H1/60

    CPC分类号: H04M1/0274 Y10T307/924

    摘要: The present disclosure provides an apparatus and a method for preventing an Intermediate Frequency (IF) connector from being corroded in a portable terminal. The apparatus may comprise an IF connector and a load switch that is mounted in a main board. The load switch is configured to communicate with the IF connector and to prevent a reverse voltage from being applied to the IF connector.

    摘要翻译: 本公开提供了一种用于防止中频(IF)连接器在便携式终端中被腐蚀的装置和方法。 该装置可以包括安装在主板中的IF连接器和负载开关。 负载开关配置为与IF连接器通信,并防止反向电压施加到IF连接器。

    DATA ERROR CORRECTION CIRCUIT, INTEGRATED CIRCUIT FOR DATA ERROR CORRECTION, AND METHOD OF PERFORMING DATA ERROR CORRECTION
    3.
    发明申请
    DATA ERROR CORRECTION CIRCUIT, INTEGRATED CIRCUIT FOR DATA ERROR CORRECTION, AND METHOD OF PERFORMING DATA ERROR CORRECTION 有权
    数据错误校正电路,用于数据错误校正的集成电路以及执行数据错误校正的方法

    公开(公告)号:US20080001965A1

    公开(公告)日:2008-01-03

    申请号:US11772985

    申请日:2007-07-03

    IPC分类号: G09G5/02

    CPC分类号: H03M13/43

    摘要: A data error correction circuit includes a plurality of one-bit registers, a data error detection unit and a data error correction unit. The data error detection unit detects whether all the data values stored in the plurality of the registers are equal. The data correction unit determines a correct data value based upon each of the stored data values, and corrects each of the data values into the determined correct data value if the data values are not equal. Therefore, the data error correction circuit may correct a data error due to electrostatic discharge (ESD) or electromagnetic interference (EMI).

    摘要翻译: 数据纠错电路包括多个一位寄存器,数据错误检测单元和数据纠错单元。 数据错误检测单元检测存储在多个寄存器中的所有数据值是否相等。 数据校正单元基于每个存储的数据值确定正确的数据值,并且如果数据值不相等,则将每个数据值校正为确定的正确数据值。 因此,数据纠错电路可以校正由于静电放电(ESD)或电磁干扰(EMI)引起的数据误差。

    Data error correction circuit, integrated circuit for data error correction, and method of performing data error correction
    4.
    发明授权
    Data error correction circuit, integrated circuit for data error correction, and method of performing data error correction 有权
    数据纠错电路,数据纠错用集成电路及数据纠错方法

    公开(公告)号:US08042020B2

    公开(公告)日:2011-10-18

    申请号:US11772985

    申请日:2007-07-03

    IPC分类号: G11C29/00

    CPC分类号: H03M13/43

    摘要: A data error correction circuit includes a plurality of one-bit registers, a data error detection unit and a data error correction unit. The data error detection unit detects whether all the data values stored in the plurality of the registers are equal. The data correction unit determines a correct data value based upon each of the stored data values, and corrects each of the data values into the determined correct data value if the data values are not equal. Therefore, the data error correction circuit may correct a data error due to electrostatic discharge (ESD) or electromagnetic interference (EMI).

    摘要翻译: 数据纠错电路包括多个一位寄存器,数据错误检测单元和数据错误校正单元。 数据错误检测单元检测存储在多个寄存器中的所有数据值是否相等。 数据校正单元基于每个存储的数据值确定正确的数据值,并且如果数据值不相等,则将每个数据值校正为确定的正确数据值。 因此,数据纠错电路可以校正由于静电放电(ESD)或电磁干扰(EMI)引起的数据误差。

    METHOD FOR AUTOMATIC CLUSTERING AND METHOD AND APPARATUS FOR MULTIPATH CLUSTERING IN WIRELESS COMMUNICATION USING THE SAME
    5.
    发明申请
    METHOD FOR AUTOMATIC CLUSTERING AND METHOD AND APPARATUS FOR MULTIPATH CLUSTERING IN WIRELESS COMMUNICATION USING THE SAME 审中-公开
    用于自动聚类的方法和方法和装置在无线通信中的多路聚合

    公开(公告)号:US20100217763A1

    公开(公告)日:2010-08-26

    申请号:US12678545

    申请日:2008-05-19

    IPC分类号: G06F17/30

    CPC分类号: H04B7/0413 G06K9/6218

    摘要: An automatic clustering method using an Average-linkage algorithm and a KPower Means algorithm, and a method and apparatus for multi-path clustering required for a spatial channel modeling (SCM) in a wireless communication environment are provided. The automatic clustering method, including: a first step of obtaining an initial cluster centroid using a hierarchical clustering algorithm; a second step of moving the initial cluster centroid using a two dimensional clustering algorithm; a third step of clustering a data set according to the moved initial cluster centroid; and a fourth step of calculating a validation index with respect to the clustered data set and determining an optimal number of clusters.

    摘要翻译: 提供了使用平均联动算法和KPower均值算法的自动聚类方法,以及在无线通信环境中为空间信道建模(SCM)所需的多径聚类的方法和装置。 自动聚类方法,包括:使用分层聚类算法获得初始聚类中心的第一步; 使用二维聚类算法移动初始聚类中心的第二步; 根据移动的初始聚类质心对数据集进行聚类的第三步骤; 以及第四步骤,相对于所述聚类数据集计算验证索引并确定最佳聚类数。

    Diaphragm pump
    6.
    发明授权
    Diaphragm pump 失效
    隔膜泵

    公开(公告)号:US5888056A

    公开(公告)日:1999-03-30

    申请号:US886225

    申请日:1997-07-01

    申请人: Seong-Cheol Kim

    发明人: Seong-Cheol Kim

    IPC分类号: F04B45/04 F04B11/00 F04B43/02

    摘要: A diaphragm pump having a simple structure for effectively preventing pulsation of liquid being discharged, which includes an air chamber connected to a head-side discharge hole of the diaphragm pump and having a discharge-side discharge hole, and thereby pipes are kept from being damaged by preventing the pulsation of the liquid, and the level of noisy can be reduced to a very adequate level.

    摘要翻译: 具有简单结构的隔膜泵,其有效地防止被排出的液体的脉动,其包括连接到隔膜泵的头侧排放孔并具有排放侧排出孔的空气室,并且由此管道被损坏 通过防止液体的脉动,并且可以将噪声水平降低到非常适当的水平。