中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

522 records (took 0.04 seconds)

    Rate-compatible low-density parity check codes
    23.
    发明专利
    Rate-compatible low-density parity check codes 有权
    速率兼容的低密度奇偶校验码

    公开(公告)号：JP2010063111A

    公开(公告)日：2010-03-18

    申请号：JP2009219253

    申请日：2009-09-24

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： BJERKE BJORN ,  KETCHUM JOHN W ,  SINDHUSHAYANA NAGABHUSHANA ,  WALTON JAY ROD

    IPC: H03M13/19 ,  H03M13/00 ,  H03M13/11 ,  H04L1/00

    CPC classification number: H04L1/0057 ,  H03M13/11 ,  H03M13/6393

    Abstract: PROBLEM TO BE SOLVED: To provide a method and an apparatus for generating code words with variable length and redundancy from a single low-density parity check (LDPC) code with variable-length input words. SOLUTION: A mother code for encoding data words is generated based on a parity check matrix, and the mother code is adjusted to reflect the size of the data word to be encoded. A generator matrix applies the mother code to the data words to produce a code words for transmission. A reduction criteria is determined and the size of the generator matrix is reduced accordingly. At a receiver, a corresponding parity check matrix is applied to decode the received code word. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 解决的问题：提供一种用于从具有可变长度输入字的单个低密度奇偶校验（LDPC）码生成具有可变长度和冗余的码字的方法和装置。 解决方案：基于奇偶校验矩阵生成用于编码数据字的母码，并且调整母码以反映要编码的数据字的大小。 生成矩阵将母码应用于数据字以产生用于传输的码字。 确定减少标准，并相应地减小发电机矩阵的尺寸。 在接收机处，应用相应的奇偶校验矩阵来解码所接收的码字。 版权所有（C）2010，JPO＆INPIT

    Efficient filter weight computation for mimo system
    25.
    发明专利
    Efficient filter weight computation for mimo system 有权
    MIMO系统的有效滤波器重量计算

    公开(公告)号：JP2011147143A

    公开(公告)日：2011-07-28

    申请号：JP2011025958

    申请日：2011-02-09

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： HOWARD STEVEN J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  MONSEN PETER ,  WALTON JAY RODNEY

    IPC: H04J99/00 ,  H04B7/04

    CPC classification number: H04B7/0854 ,  H04B7/0413 ,  H04L25/0246 ,  H04L25/0248 ,  H04L2025/03426 ,  H04L2025/03605 ,  H04L2025/03611

    Abstract: PROBLEM TO BE SOLVED: To efficiently derive a spatial filter matrix. SOLUTION: In a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：有效地导出空间滤波器矩阵。 解决方案：在第一种方案中，基于信道响应矩阵迭代地导出Hermitian矩阵，并且通过迭代地导出Hermitian矩阵来间接计算矩阵求逆。 基于Hermitian矩阵和信道响应矩阵导出空间滤波矩阵。 在第二方案中，执行多次旋转以迭代地获得用于信道响应矩阵的伪逆矩阵的第一和第二矩阵。 基于第一和第二矩阵导出空间滤波器矩阵。 在第三方案中，基于信道响应矩阵形成矩阵并分解以获得酉矩阵和对角矩阵。 基于单一矩阵，对角矩阵和信道响应矩阵导出空间滤波器矩阵。 版权所有（C）2011，JPO＆INPIT

    Adaptation rate control for ofdm communication system
    27.
    发明专利
    Adaptation rate control for ofdm communication system 有权
    OFDM通信系统的适应速率控制

    公开(公告)号：JP2010239653A

    公开(公告)日：2010-10-21

    申请号：JP2010132185

    申请日：2010-06-09

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALLACE MARK

    IPC: H04J11/00 ,  H04L1/00 ,  H04Q7/38

    CPC classification number: H04L1/0015 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  Y02D50/10

    Abstract: PROBLEM TO BE SOLVED: To provide a technology for adaptively controlling a data transmission rate in a radio (e.g., OFDM) communication system.
    SOLUTION: In one viewpoint, various kinds of metrics may be derived and used to select a suitable rate for data transmission. Some kinds of metrics relate to different characteristics of a communication channel such as an SNR, a frequency selection degree, a time selection degree and the like. One kind of metrics relates to data transmission performance. In another viewpoint, the various kinds of metrics may be used in a different way to adaptively control the rate. Some metrics may be used for open-loop control, other metrics may be used for closed-loop control, and some may be used for both. For example, a channel metrics may be used to decide or select the rate, and a performance metrics may be used to decide whether or not to adjust the rate.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种用于在无线电（例如，OFDM）通信系统中自适应地控制数据传输速率的技术。 解决方案：从一个角度来看，可以导出各种度量来用于选择用于数据传输的合适的速率。 某些度量涉及通信信道的不同特性，例如SNR，频率选择度，时间选择度等。 一种度量与数据传输性能有关。 另一方面，可以以不同的方式使用各种度量来自适应地控制速率。 一些度量可以用于开环控制，其他度量可以用于闭环控制，一些度量可以用于两者。 例如，可以使用信道度量来决定或选择速率，并且可以使用性能度量来决定是否调整速率。 版权所有（C）2011，JPO＆INPIT

    Multi-antenna transmission for spatial division multiple access
    29.
    发明专利
    Multi-antenna transmission for spatial division multiple access 有权
    用于空间多路访问的多天线传输

    公开(公告)号：JP2010183578A

    公开(公告)日：2010-08-19

    申请号：JP2010025725

    申请日：2010-02-08

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALTON J RODNEY ,  KETCHUM JOHN W ,  SMEE JOHN EDWARD ,  WALLACE MARK S ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B1/707 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L5/02 ,  H04Q7/36

    CPC classification number: H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for selecting a proper set of user terminals for simultaneous transmission, and transmitting and receiving data between the selected user terminals. SOLUTION: An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector for use by the terminal to transmit on the uplink. An "effective" uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供用于选择用于同时传输的适当的用户终端集合以及在所选择的用户终端之间发送和接收数据的技术。 解决方案：为每个终端获得上行链路信道响应矩阵，并对其进行分解，以获得终端在上行链路上使用的导引向量。 基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 版权所有（C）2010，JPO＆INPIT

    Method and device for processing data in multiple-input multiple-output (mimo) communication system using channel state information
    30.
    发明专利
    Method and device for processing data in multiple-input multiple-output (mimo) communication system using channel state information 有权
    用于使用信道状态信息在多输入多输出（MIMO）通信系统中处理数据的方法和装置

    公开(公告)号：JP2010136409A

    公开(公告)日：2010-06-17

    申请号：JP2010003249

    申请日：2010-01-08

    Applicant: Qualcomm Inc ,  クゥアルコム・インコーポレイテッドQualcomm Incorporated

    Inventor： WALTON JAY R ,  WALLACE MARK ,  KETCHUM JOHN W ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04J11/00 ,  H04L1/00

    CPC classification number: H04B7/0417 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/10 ,  H04B7/12 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0048 ,  H04L1/005 ,  H04L1/0071

    Abstract: PROBLEM TO BE SOLVED: To provide a technique to successively process received signals in a receiver unit and to adaptively process data in a transmitter unit based on channel state information available with an MIMO channel in an MIMO system for recovering transmitted data. SOLUTION: A successive cancellation receiver processing technique is used for processing the received signals and performing a number of iterations in order to provide a decoded data stream. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are evaluated and informed to the source of the transmitter system to adjust processing (such as coding, modulation) of data prior to transmission (i.e., adaptation). COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种在接收机单元中连续处理接收信号并基于用于恢复发送数据的MIMO系统中的MIMO信道可用的信道状态信息自适应地处理发射机单元中的数据的技术。 解决方案：连续的取消接收器处理技术用于处理接收的信号并执行多次迭代以提供解码的数据流。 对于每次迭代，处理用于迭代的输入（例如，接收的）信号以提供一个或多个符号流。 选择并处理符号流中的一个以提供解码的数据流。 由于解码的数据流的干扰从提供给下一次迭代的输入信号中被去除（即，取消）。 对信道特性进行评估并通知给发射机系统的源，以便在传输（即，适配）之前调整数据的处理（例如编码，调制）。 版权所有（C）2010，JPO＆INPIT

Patent Agency Ranking