中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

412 records (took 0.04 seconds)

    Continuous beamforming for mimo-ofdm system
    1.
    发明专利
    Continuous beamforming for mimo-ofdm system 审中-公开
    用于MIMO-OFDM系统的连续波束

    公开(公告)号：JP2013042506A

    公开(公告)日：2013-02-28

    申请号：JP2012187907

    申请日：2012-08-28

    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 ,  WALTON JAY RODNEY ,  WALLACE MARK S

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/10 ,  H04J11/00 ,  H04L5/02 ,  H04L27/26 ,  H04W16/28 ,  H04W72/04

    CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0671

    Abstract: PROBLEM TO BE SOLVED: To provide continuous beamforming for a MIMO-OFDM system.SOLUTION: A transmitting entity 210 performs spatial processing on data symbols for each subband with an eigenmode matrix, a steering matrix, or an identity matrix to obtain spatially processed symbols for the subband. The data symbols are sent on orthogonal spatial channels with the eigenmode matrix, on different spatial channels with the steering matrix, or from different transmit antennas with the identity matrix. The transmitting entity further performs beamforming on the spatially processed symbols, in the frequency domain or time domain, prior to transmission from the multiple transmit antennas 234. A receiving entity 250 performs complementary processing to recover the data symbols sent by the transmitting entity. The receiving entity derives a spatial filter matrix for each subband on the basis of a MIMO channel response for that subband and performs receiver spatial processing for the subband with the spatial filter matrix.

    Abstract translation: 要解决的问题：为MIMO-OFDM系统提供连续波束成形。 解决方案：发送实体210对具有本征模式矩阵，导向矩阵或单位矩阵的每个子带的数据符号执行空间处理，以获得子带的空间处理符号。 数据符号在具有本征模式矩阵的正交空间信道上，在具有导引矩阵的不同空间信道上，或者从具有单位矩阵的不同发射天线发送。 发射实体在从多个发射天线234发射之前，在频域或时域中进一步对空间处理符号进行波束成形。接收实体250执行补充处理以恢复由发射实体发送的数据符号。 接收实体根据该子带的MIMO信道响应为每个子带导出空间滤波器矩阵，并利用空间滤波器矩阵对子带执行接收机空间处理。 版权所有（C）2013，JPO＆INPIT

    Receiver for wireless communication network with extended range
    2.
    发明专利
    Receiver for wireless communication network with extended range 有权
    接收无线通信网络的扩展范围

    公开(公告)号：JP2011182409A

    公开(公告)日：2011-09-15

    申请号：JP2011062827

    申请日：2011-03-22

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

    Inventor： WALTON JAY RODNEY ,  WALLACE MARK S

    IPC: H04B1/7073 ,  H04B7/02

    CPC classification number: H04L1/0072 ,  H04B1/7073 ,  H04B1/7075 ,  H04L1/0045 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/0006 ,  H04L27/0014 ,  H04L2027/0038 ,  H04L2027/0065 ,  H04L2027/0097

    Abstract: PROBLEM TO BE SOLVED: To provide a receiver for wireless communication network with an extended range. SOLUTION: A technique for detecting and demodulating a signal/transmission is described. The signal detection is performed in a plurality of stages using different types of signal processing, such as, for example, using time-domain correlation in a first stage, frequency-domain processing in a second stage, and time-domain processing in a third stage. In the first stage, products of symbols are generated for at least two different delays, correlation processing between the products of respective delays and known values is performed, and correlation results for all delays are combined to declare the presence of a signal. In the demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected sample, which are processed through channel estimate to obtain detected symbols. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题：提供具有扩展范围的无线通信网络的接收机。 解决方案：描述了用于检测和解调信号/传输的技术。 使用不同类型的信号处理，例如使用第一级中的时域相关性，第二级中的频域处理和第三级中的时域处理，在多个级中执行信号检测 阶段。 在第一阶段，对于至少两个不同的延迟产生符号的乘积，执行各个延迟的乘积与已知值之间的相关处理，并且组合所有延迟的相关结果以声明存在信号。 在解调中，调整输入样本的定时以获得经时间调整的样本。 频率偏移被估计并从定时调整的样本中去除以获得频率校正的样本，其通过信道估计来处理以获得检测到的符号。 版权所有（C）2011，JPO＆INPIT

    Efficient filter weight computation for mimo system
    3.
    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

    Multi-antenna transmission for spatial division multiple access
    4.
    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

    Noise estimation for wireless communication
    6.
    发明专利
    Noise estimation for wireless communication 有权
    无线通信的噪声估计

    公开(公告)号：JP2012249310A

    公开(公告)日：2012-12-13

    申请号：JP2012157608

    申请日：2012-07-13

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

    Inventor： WALLACE MARK S ,  MONSEN PETER

    IPC: H04J11/00 ,  H04J99/00

    CPC classification number: H04L1/20 ,  H04L25/0242 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

    Abstract: PROBLEM TO BE SOLVED: To provide a device for deriving and using noise estimate for data reception in a wireless communication system.SOLUTION: A noise estimate may be derived for each packet received in a data transmission. Data detection is then performed for each packet using the noise estimate for the packet. For the noise estimation, a first sample sequence and a second sample sequence may be obtained from each receiver used for data reception. A phase offset between the first and second sample sequences is determined and applied to the first sample sequence for each receiver to obtain a third sample sequence for the receiver. A noise estimate may then be obtained based on the differences in electric power between the second and third sample sequences for the at least one receiver.

    Abstract translation: 要解决的问题：提供一种用于在无线通信系统中导出和使用用于数据接收的噪声估计的装置。 解决方案：可以为数据传输中接收到的每个数据包导出噪声估计。 然后使用分组的噪声估计对每个分组执行数据检测。 对于噪声估计，可以从用于数据接收的每个接收机获得第一采样序列和第二采样序列。 确定第一和第二采样序列之间的相位偏移并将其应用于每个接收机的第一采样序列，以获得接收机的第三采样序列。 然后可以基于对于至少一个接收机的第二和第三采样序列之间的电功率的差异来获得噪声估计。 版权所有（C）2013，JPO＆INPIT

    Frequency-independent spatial processing for wideband miso and mimo systems
    7.
    发明专利
    Frequency-independent spatial processing for wideband miso and mimo systems 有权
    用于宽带MISO和MIMO系统的频率独立空间处理

    公开(公告)号：JP2012199933A

    公开(公告)日：2012-10-18

    申请号：JP2012104813

    申请日：2012-05-01

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

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

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L25/02 ,  H04L27/26

    CPC classification number: H04L1/0002 ,  H04B7/0417 ,  H04B7/0617 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0242 ,  H04L27/2647

    Abstract: PROBLEM TO BE SOLVED: To provide frequency-independent eigensteering in MISO and MIMO systems.SOLUTION: A correlation matrix is computed for a MIMO channel based on channel response matrices and decomposed to obtain NS frequency-independent steering vectors for NS spatial channels of the MIMO channel. For main path eigensteering, a data symbol stream is transmitted on the best spatial channel for the main propagation path of the MIMO channel. For receiver eigensteering, a data symbol stream is steered toward a receive antenna based on a steering vector obtained for that receive antenna. For all eigensteering schemes, a matched filter is derived for each receive antenna based on the steering vector(s) and channel response vectors for the receive antenna.

    Abstract translation: 要解决的问题：在MISO和MIMO系统中提供频率独立的本征导引。 解决方案：基于信道响应矩阵为MIMO信道计算相关矩阵，并分解以获得用于MIMO信道的NS空间信道的NS频率无关导向向量。 对于主路径特征导向，在MIMO信道的主传播路径的最佳空间信道上发送数据符号流。 对于接收机本征导向，基于为该接收天线获得的导向向量，将数据符号流转向接收天线。 对于所有特征导向方案，基于接收天线的导向矢量和信道响应向量，为每个接收天线导出匹配滤波器。 版权所有（C）2013，JPO＆INPIT

    Noise estimation for wireless communication
    8.
    发明专利
    Noise estimation for wireless communication 有权
    无线通信的噪声估计

    公开(公告)号：JP2012120208A

    公开(公告)日：2012-06-21

    申请号：JP2012004927

    申请日：2012-01-13

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

    Inventor： WALLACE MARK S ,  MONSEN PETER

    IPC: H04J11/00 ,  H04J99/00

    CPC classification number: H04L1/20 ,  H04L25/0242 ,  H04L25/03305 ,  H04L27/2613 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

    Abstract: PROBLEM TO BE SOLVED: To provide techniques for deriving and using noise estimation for data reception in a wireless communication system.SOLUTION: A noise estimation may be derived for each packet received in data transmission. Data detection may then be performed for each packet using the noise estimation for that packet. For the noise estimation, a first sample sequence and a second sample sequence may be obtained from each receiver used for data reception. A phase offset between the first and second sample sequences may be determined and applied to the first sample sequence for each receiver to obtain a third sample sequence for that receiver. A noise estimation may then be derived based on the power of the differences between the second and third sample sequences for at least one receiver.

    Abstract translation: 要解决的问题：提供用于在无线通信系统中导出和使用用于数据接收的噪声估计的技术。 解决方案：可以为在数据传输中接收到的每个分组导出噪声估计。 然后可以使用该分组的噪声估计对每个分组执行数据检测。 对于噪声估计，可以从用于数据接收的每个接收机获得第一采样序列和第二采样序列。 可以确定第一和第二采样序列之间的相位偏移并将其应用于每个接收机的第一采样序列，以获得该接收机的第三采样序列。 然后可以基于至少一个接收机的第二和第三采样序列之间的差的功率来导出噪声估计。 版权所有（C）2012，JPO＆INPIT

    Transmission diversity and spatial spreading for ofdm-based multi-antenna communication system
    10.
    发明专利
    Transmission diversity and spatial spreading for ofdm-based multi-antenna communication system 有权
    基于OFDM的多天线通信系统的传输多样性和空间扩展

    公开(公告)号：JP2010200342A

    公开(公告)日：2010-09-09

    申请号：JP2010087967

    申请日：2010-04-06

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

    Inventor： WALTON JAY RODNEY ,  KETCHUM JOHN W ,  WALLACE MARK S ,  HOWARD STEVEN J ,  NANDA SANJIV

    IPC: H04J11/00 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04L27/26

    CPC classification number: H04B7/0615 ,  H04B7/0413 ,  H04L27/2602

    Abstract: PROBLEM TO BE SOLVED: To achieve transmission diversity on a legacy single-antenna receiving device. SOLUTION: In order to obtain transmission diversity, a transmission entity uses different pseudo-random steering vectors across subbands, and uses the same steering vector across packets for each subband. A receiving entity does not need to know the pseudo-random steering vectors and further does not need to perform any space processing. For space spreading, the transmission entity uses different pseudo-random steering vectors across the subbands and uses different steering vectors across the packets for each subband. Only the transmission and the receiving entities know the steering vectors used for data transmission. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：实现传统单天线接收设备的传输分集。 解决方案：为了获得传输分集，传输实体在子带之间使用不同的伪随机导引向量，并且对于每个子带使用相同的导向向量跨包。 接收实体不需要知道伪随机导引向量，并且不需要执行任何空间处理。 对于空间扩展，传输实体在子带上使用不同的伪随机导引向量，并且对于每个子带使用不同的导向向量跨越分组。 只有传输和接收实体知道用于数据传输的导向向量。 版权所有（C）2010，JPO＆INPIT

Patent Agency Ranking