中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

37 records (took 0.032 seconds)

    METHOD AND APPARATUS FOR PILOT SIGNAL PROCESSING IN A WIRELESS COMMUNICATION SYSTEM
    1.
    发明申请
    METHOD AND APPARATUS FOR PILOT SIGNAL PROCESSING IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    无线通信系统中的引导信号处理方法与装置

    公开(公告)号：WO2011087886A1

    公开(公告)日：2011-07-21

    申请号：PCT/US2010/062461

    申请日：2010-12-30

    Applicant: MOTOROLA MOBILITY, INC. ,  THOMAS, Timothy A., ,  MONDAL, Bishwarup,

    Inventor： THOMAS, Timothy A., ,  MONDAL, Bishwarup,

    IPC: H04B1/707 ,  H04J13/16 ,  H04J13/00

    CPC classification number: H04B1/7097 ,  H04B1/7075 ,  H04B2201/70701 ,  H04B2201/709709 ,  H04J13/0062 ,  H04J13/16 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0048 ,  H04L27/2611

    Abstract: A wireless communication system (100) is provided that spreads pilot signals, or channel state information reference signals (CSI-RSs), using a spreading code chosen from a set of mutually unbiased bases (MUBs). The advantages of such spreading with MUBs are that multiple base stations (110, 120) can send their pilot signals on a same time-frequency resources, making the pilot signal design very efficient and also improving channel estimation at a user equipment (102, 103) through orthogonal and quasi-orthogonal spreading which gives a gain above noise and interference. A short spreading code chosen from MUBs may be used for spreading pilot signals transmitted from each antenna of a base station within a time-frequency resource comprising multiple closely-spaced subcarriers in frequency and/or multiple closely-spaced symbols in time.

    Abstract translation: 提供了一种使用从一组相互无偏置的基座（MUB）中选择的扩展码扩展导频信号或信道状态信息参考信号（CSI-RS）的无线通信系统（100）。 MUB这种扩展的优点在于，多个基站（110,120）可以在相同的时间 - 频率资源上发送其导频信号，使得导频信号设计非常有效，并且还改善用户设备（102,103）处的信道估计 ）通过正交和准正交扩展，其产生高于噪声和干扰的增益。 从MUB中选择的短扩展码可以用于在频率和/或多个紧密间隔的符号中包括多个紧密间隔的子载波的时间频率资源内扩频从基站的每个天线发送的导频信号。

    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING
    3.
    发明申请
    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 审中-公开
    封闭环路发射反馈的方法与装置

    公开(公告)号：WO2008144189A4

    公开(公告)日：2009-03-12

    申请号：PCT/US2008062211

    申请日：2008-05-01

    Applicant: MOTOROLA INC ,  MONDAL BISHWARUP ,  HARRISON ROBERT M ,  THOMAS TIMOTHY A

    Inventor： MONDAL BISHWARUP ,  HARRISON ROBERT M ,  THOMAS TIMOTHY A

    IPC: H04B7/04 ,  H04B7/06

    CPC classification number: H04B7/0417 ,  H04B7/0465 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066

    Abstract: A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step (900) of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step (902) includes measuring a composite channel between the transmitter and receiver. A next step (904) includes determining at least one performance metric for each set of weightings in the codebook. A next step (906) includes selecting preferred weightings for each data stream in response to the performance metrics. A next step (908) includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.

    Abstract translation: 描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。 该方法包括第一步骤（900），其提供包含多个发射天线的每个数据流的加权集合的码本，其中每个集合由发射机和接收机已知的索引识别。 相同的码本被用于直到发射天线数量的任何数量的数据流。 下一步骤（902）包括测量发射机和接收机之间的复合信道。 下一步骤（904）包括为码本中的每个权重集合确定至少一个性能度量。 下一步骤（906）包括响应于性能度量为每个数据流选择优选权重。 下一步骤（908）包括将优先权重的索引反馈到发射机用于随后的传输。

    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING
    4.
    发明申请
    METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 审中-公开
    封闭环路发射反馈的方法与装置

    公开(公告)号：WO2008144189A2

    公开(公告)日：2008-11-27

    申请号：PCT/US2008/062211

    申请日：2008-05-01

    Applicant: MOTOROLA, INC. ,  MONDAL, Bishwarup, ,  HARRISON, Robert M., ,  THOMAS, Timothy A.,

    Inventor： MONDAL, Bishwarup, ,  HARRISON, Robert M., ,  THOMAS, Timothy A.,

    IPC: H04B7/04

    CPC classification number: H04B7/0417 ,  H04B7/0465 ,  H04B7/063 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/066

    Abstract: A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step (900) of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step (902) includes measuring a composite channel between the transmitter and receiver. A next step (904) includes determining at least one performance metric for each set of weightings in the codebook. A next step (906) includes selecting preferred weightings for each data stream in response to the performance metrics. A next step (908) includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.

    Abstract translation: 描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。 该方法包括第一步骤（900），其提供包含多个发射天线的每个数据流的加权集合的码本，其中每个集合由发射机和接收机已知的索引识别。 相同的码本被用于直到发射天线数量的任何数量的数据流。 下一步骤（902）包括测量发射机和接收机之间的复合信道。 下一步骤（904）包括为码本中的每个权重集合确定至少一个性能度量。 下一步骤（906）包括响应于性能度量为每个数据流选择优选权重。 下一步骤（908）包括将优先权重的索引反馈到发射机用于随后的传输。

    METHOD AND APPARATUS FOR PERFORMING CYCLIC-SHIFT DIVERSITY WITH BEAMFORMING
    7.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING CYCLIC-SHIFT DIVERSITY WITH BEAMFORMING 审中-公开
    用于实现带有波束形状的循环转移多样性的方法和装置

    公开(公告)号：WO2007081592A2

    公开(公告)日：2007-07-19

    申请号：PCT/US2006049654

    申请日：2006-12-29

    Applicant: MOTOROLA INC ,  VOOK FREDERICK W ,  THOMAS TIMOTHY A ,  ZHUANG XIANGYANG

    Inventor： VOOK FREDERICK W ,  THOMAS TIMOTHY A ,  ZHUANG XIANGYANG

    IPC: H04B1/38

    CPC classification number: H04B7/0671

    Abstract: Cyclic-shift diversity transmission and optional per-subcarrier transmit beamforming within a same time interval (e.g., OFDM symbol interval) takes place. The CSD transmission technique circularly shifts the IFFT output prior to any cyclic prefix insertion and has the effect of putting a subcarrier and antenna dependent phase shift in the effective channel response from each transmit antenna. To properly perform transmit adaptive array (TXAA) transmission within an OFDM symbol interval that is being circularly shifted by the CSD transmission technique, the TXAA weights will account for the frequency domain phase shift created by the CSD circular shift operation.

    Abstract translation: 发生在相同时间间隔（例如，OFDM符号间隔）内的循环移位分集传输和可选的每副载波发射波束形成。 CSD传输技术在任何循环前缀插入之前循环移位IFFT输出，并且具有将每个发射天线的有效信道响应中的副载波和天线相关相移放在有效信道响应中的作用。 为了在通过CSD传输技术循环移位的OFDM符号间隔内适当地执行发射自适应阵列（TXAA）传输，TXAA权重将考虑由CSD循环移位操作产生的频域相移。

    METHOD AND APPARATUS FOR PILOT SIGNAL TRANSMISSION
    8.
    发明申请
    METHOD AND APPARATUS FOR PILOT SIGNAL TRANSMISSION 审中-公开
    引导信号传输的方法和装置

    公开(公告)号：WO2007021384A2

    公开(公告)日：2007-02-22

    申请号：PCT/US2006/025583

    申请日：2006-06-29

    Applicant: MOTOROLA, INC. ,  THOMAS, Timothy A. ,  BAUM, Kevin L. ,  CLASSON, Brian K. ,  NANGIA, Vijay

    Inventor： THOMAS, Timothy A. ,  BAUM, Kevin L. ,  CLASSON, Brian K. ,  NANGIA, Vijay

    IPC: H04J11/00 ,  H04B3/10

    CPC classification number: H04B7/0678 ,  H04L5/0023 ,  H04L5/0048

    Abstract: A pilot transmission scheme is presented where during a first OFDM symbol period a first pilot sequence is transmitted over multiple sub-carriers on a first group of antennas. During a second OFDM symbol period, a second pilot sequence is transmitted over the multiple sub-carriers on a second group of antennas. The first group of antennas does not transmit pilot sequences when the second group of antennas is transmitting pilot sequences. Additionally, the second group of antennas does not transmit pilot sequences when the first group of antennas is transmitting pilot sequences.

    Abstract translation: 提出了一种导频传输方案，其中在第一OFDM符号周期期间，在第一组天线上的多个子载波上发送第一导频序列。 在第二OFDM符号周期期间，在第二组天线上的多个子载波上发送第二导频序列。 当第二组天线正在发射导频序列时，第一组天线不发射导频序列。 另外，当第一组天线正在发送导频序列时，第二组天线不发送导频序列。

Patent Agency Ranking