利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

38 条记录 (耗时 0.037 秒)

    Multiple-input, multiple-output (MIMO) systems with multiple transmission modes
    12.
    发明授权
    Multiple-input, multiple-output (MIMO) systems with multiple transmission modes 有权
    具有多种传输模式的多输入多输出（MIMO）系统

    公开(公告)号：US07738428B2

    公开(公告)日：2010-06-15

    申请号：US10985400

    申请日：2004-11-10

    申请人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    发明人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    IPC分类号： H04Q7/00

    CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04W52/42

    摘要： Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a “beam-forming” transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a “multi-mode” transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

    摘要翻译： 使用需要较少信道状态信息（CSI）的多个传输方案在多信道通信系统中在多个传输信道上传输数据的技术。 这些方案可以包括在被选择使用的每个发射天线上发送单个数据流的部分CSI传输方案以及将所有发射功率分配给具有最佳性能的单个传输信道的“波束形成”传输方案。 每个传输方案可以为特定范围的操作条件（或操作SNR）提供良好或接近最佳的性能。 然后，这些多个传输方案可以以分段方式组合以形成覆盖由MIMO系统支持的全部操作条件的“多模式”传输方案。 在任何给定时刻用于数据传输的具体传输方案将取决于系统在此刻经历的特定操作条件。

    Resource allocation for MIMO-OFDM communication systems
    13.
    发明授权
    Resource allocation for MIMO-OFDM communication systems 有权
    MIMO-OFDM通信系统的资源分配

    公开(公告)号：US08094625B2

    公开(公告)日：2012-01-10

    申请号：US11248890

    申请日：2005-10-11

    申请人： Jay Rod Walton ,  John W. Ketchum ,  Mark Wallace ,  Irina Medvedev

    发明人： Jay Rod Walton ,  John W. Ketchum ,  Mark Wallace ,  Irina Medvedev

    IPC分类号： H04Q7/00

    CPC分类号： H04L5/0023 ,  H04L1/06 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0058 ,  H04L5/006

    摘要： Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminal(s) (for the uplink). The performance of each sub-hypothesis is then evaluated (e.g., based on one or more performance metrics). One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and the one or more terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band.

    摘要翻译： 基于终端的空间和/或频率“签名”，在MIMO-OFDM系统的下行链路和/或上行链路上安排终端进行数据传输的技术。 调度器形成用于多个频带中的每一个的可能（下行链路或上行链路）数据传输的一个或多个终端集合。 每个假设可以进一步形成一个或多个子假设，每个子假设对应于（1）假设（对于下行链路）的发射天线到终端的特定分配，或者（2）特定顺序 用于处理来自终端（用于上行链路）的上行链路数据传输。 然后评估每个子假设的性能（例如，基于一个或多个性能度量）。 然后根据评估的性能为每个频带选择一个子假设，然后调度每个选择的子假设中的一个或多个终端用于相应频带上的数据传输。

    MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES
    14.
    发明申请
    MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) SYSTEMS WITH MULTIPLE TRANSMISSION MODES 有权
    具有多种传输模式的多输入多输出（MIMO）系统

    公开(公告)号：US20100166100A1

    公开(公告)日：2010-07-01

    申请号：US12721697

    申请日：2010-03-11

    申请人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    发明人： Irina Medvedev ,  Jay Rod Walton ,  Mark Wallace

    IPC分类号： H04B7/02 ,  H04L27/00 ,  H04L25/03

    CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0439 ,  H04B7/0443 ,  H04B7/061 ,  H04B7/0626 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0046 ,  H04L5/006 ,  H04W52/42

    摘要： Techniques to transmit data on a number of transmission channels in a multi-channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a “beam-forming” transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a “multi-mode” transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

    摘要翻译： 使用需要较少信道状态信息（CSI）的多个传输方案在多信道通信系统中在多个传输信道上传输数据的技术。 这些方案可以包括在被选择使用的每个发射天线上发送单个数据流的部分CSI传输方案以及将所有发射功率分配给具有最佳性能的单个传输信道的“波束形成”传输方案。 每个传输方案可以为特定范围的操作条件（或操作SNR）提供良好或接近最佳的性能。 然后，这些多个传输方案可以以分段方式组合以形成覆盖由MIMO系统支持的全部操作条件的“多模式”传输方案。 在任何给定时刻用于数据传输的具体传输方案将取决于系统在此刻经历的特定操作条件。

    Resource allocation for MIMO-OFDM communication systems
    15.
    发明授权
    Resource allocation for MIMO-OFDM communication systems 有权

    公开(公告)号：US07020110B2

    公开(公告)日：2006-03-28

    申请号：US10042529

    申请日：2002-01-08

    申请人： Jay Rod Walton ,  John W. Ketchum ,  Mark Wallace ,  Irina Medvedev

    发明人： Jay Rod Walton ,  John W. Ketchum ,  Mark Wallace ,  Irina Medvedev

    IPC分类号： H04Q7/00

    CPC分类号： H04L5/0023 ,  H04L1/06 ,  H04L5/0042 ,  H04L5/0044 ,  H04L5/0058 ,  H04L5/006

    摘要： Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminal(s) (for the uplink). The performance of each sub-hypothesis is then evaluated (e.g., based on one or more performance metrics). One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and the one or more terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band.

    Methods and system for transmission mode selection in a multi channel communication system
    17.
    发明授权
    Methods and system for transmission mode selection in a multi channel communication system 失效
    多通道通信系统中传输模式选择的方法与系统

    公开(公告)号：US08462653B2

    公开(公告)日：2013-06-11

    申请号：US12778911

    申请日：2010-05-12

    申请人： Irina Medvedev ,  John W. Ketchum ,  J. Rodney Walton

    发明人： Irina Medvedev ,  John W. Ketchum ,  J. Rodney Walton

    IPC分类号： H04L12/26

    CPC分类号： H04W24/02 ,  H04L1/0002 ,  H04L1/0016 ,  H04L1/0019 ,  H04L1/0025 ,  H04L1/06 ,  H04L1/20

    摘要： Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.

    摘要翻译： 在本公开中提出了在具有变化的SNR的多个空间信道的多通道通信系统中选择用于数据传输的合适传输模式的技术。 对于某些实施例，可以应用闭环技术，其中调整用于计算反馈到发射机的有效SNR值的回退因子。 还提出了一种开环速率控制方案，其中发射机可以基于在接收机处是否发送的分组被错误地接收来选择数据速率和数量的数据流。

    Coding and modulation for multiple data streams in a communication system
    18.
    发明授权
    Coding and modulation for multiple data streams in a communication system 有权
    通信系统中多个数据流的编码和调制

    公开(公告)号：US08358714B2

    公开(公告)日：2013-01-22

    申请号：US11190106

    申请日：2005-07-25

    申请人： Jay Rodney Walton ,  Irina Medvedev

    发明人： Jay Rodney Walton ,  Irina Medvedev

    IPC分类号： H04L1/02

    CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/06 ,  Y02D50/10

    摘要： Techniques for transmitting multiple data streams to a single receiver using a single code rate and different modulation schemes are described. Channel estimates are determined for the multiple data streams and used to select a single code rate and multiple modulation schemes for the multiple data streams. The system may support a set of code rates, and each code rate may be associated with a respective set of modulation schemes that may be used with that code rate. The single code rate for all data streams is selected from among the set of supported code rates, and the modulation scheme for each data stream is selected from among the set of modulation schemes associated with the single code rate. The multiple data streams are encoded in accordance with the single code rate. Each data stream is further modulated in accordance with the modulation scheme selected for that stream.

    摘要翻译： 描述了使用单个码率和不同调制方案将多个数据流发送到单个接收机的技术。 为多个数据流确定信道估计，并用于为多个数据流选择单个码率和多个调制方案。 该系统可以支持一组码率，并且每个码率可以与可以与该码率一起使用的相应的一组调制方案​​相关联。 从所支持的码率集合中选择所有数据流的单码率，并且从与单个码率相关联的调制方案组中选择每个数据流的调制方案。 多个数据流根据单码率进行编码。 根据为该流选择的调制方案进一步调制每个数据流。

    Acquisition of timing information in wireless communication systems
    19.
    发明授权
    Acquisition of timing information in wireless communication systems 有权
    无线通信系统中定时信息​​的获取

    公开(公告)号：US07995616B2

    公开(公告)日：2011-08-09

    申请号：US12022975

    申请日：2008-01-30

    申请人： Mark S. Wallace ,  Jay Rodney Walton ,  Irina Medvedev

    发明人： Mark S. Wallace ,  Jay Rodney Walton ,  Irina Medvedev

    IPC分类号： H04J13/00

    CPC分类号： H04L27/2679 ,  H04L7/042 ,  H04L7/08 ,  H04L27/2655 ,  H04L27/2676

    摘要： A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols.

    摘要翻译： 一种用于在无线通信系统中识别参考时间点的方法包括：接收第一重复符号序列; 接收第二重复符号序列; 执行所述第一和第二符号序列之间的自相关; 并且将第一和第二重复符号序列之间的自相关空值识别为时间上的参考点。 用于在无线通信系统中识别参考点的装置包括：用于接收第一重复符号序列的装置; 用于接收第二重复符号序列的装置; 用于执行所述第一和第二符号序列之间的自相关的装置; 以及用于将所述第一和第二重复符号序列之间的自相关零点识别为所述参考点的装置。

    Rate selection with margin sharing
    20.
    发明授权
    Rate selection with margin sharing 有权
    费率选择与保证金共享

    公开(公告)号：US08855226B2

    公开(公告)日：2014-10-07

    申请号：US12270842

    申请日：2008-11-13

    申请人： Irina Medvedev ,  J. Rodney Walton

    发明人： Irina Medvedev ,  J. Rodney Walton

    IPC分类号： H04B7/02 ,  H04L1/00 ,  H04B7/04

    CPC分类号： H04L1/0002 ,  H04B7/0413 ,  H04L1/0015 ,  Y02D50/10

    摘要： Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has an SNR margin below a threshold, each remaining data stream has an SNR margin above a respective threshold, and the total SNR margin for all streams is above a total threshold. For rate selection with margin sharing with a vector-quantized rate set, SNR estimates are obtained for usable transmission channels. The total SNR margin is determined for each rate combination based on the estimates. Each rate combination is associated with a specific number of data streams to transmit, a specific rate for each data stream, and a specific overall throughput. The combination with the highest overall throughput and non-negative total SNR margin is selected.

    摘要翻译： 介绍了具有独立数据流速率的系统中利润分配的费率选择。 获得每个流的信噪比（SNR）估计。 基于SNR估计为流选择速率，使得至少一个数据流的SNR余量低于阈值，每个剩余数据流具有高于相应阈值的SNR裕度，并且所有流的总SNR余量高于 总门槛。 对于利用矢量量化速率集进行边缘共享的速率选择，可获得可用传输信道的SNR估计。 基于估计，确定每个速率组合的总SNR容限。 每个速率组合与要发送的特定数量的数据流，每个数据流的特定速率以及特定的总吞吐量相关联。 选择具有最高总吞吐量和非负总体SNR余量的组合。