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    Doppler spread estimation system
    1.
    发明授权
    Doppler spread estimation system 有权
    多普勒扩展估计系统

    公开(公告)号：US06563861B1

    公开(公告)日：2003-05-13

    申请号：US09273480

    申请日：1999-03-22

    申请人： Leonid Krasny ,  Sandeep Chennakeshu ,  David Koilpillai

    发明人： Leonid Krasny ,  Sandeep Chennakeshu ,  David Koilpillai

    IPC分类号： H04B1500

    CPC分类号： H04B7/01 ,  H04B1/707 ,  H04B1/709 ,  H04B2201/70701

    摘要： A receiving apparatus Doppler spread estimator includes a receiver receiving signals over a transmission channel that varies over time due to fading and converting the signals to digital samples for processing. A stationarizer operatively associated with the receiver stationarizes the digital samples. An estimator is operatively associated with the stationarizer for estimating spectral density of the stationarized digital samples. The correlator is operatively coupled to the estimator for correlating the spectral density estimates with functions corresponding to hypotheses of plural Doppler spread values to select one of the Doppler spread values as an estimate of actual Doppler spread.

    摘要翻译： 接收装置多普勒扩展估计器包括接收器，其通过传输信道接收由于衰落而随时间变化的信号，并将信号转换为数字样本进行处理。 与接收器可操作地相关联的台式计算机将数字样本平均化。 估计器可操作地与台式计算机相关联，用于估计平台化数字样本的频谱密度。 相关器可操作地耦合到估计器，用于将频谱密度估计与对应于多个多普勒扩展值的假设的函数相关联，以选择多普勒扩展值中的一个作为实际多普勒扩展的估计。

    Method and apparatus for impairment correlation estimation in a wireless communication receiver
    2.
    发明授权
    Method and apparatus for impairment correlation estimation in a wireless communication receiver 有权
    无线通信接收机的损伤相关估计方法和装置

    公开(公告)号：US08670497B2

    公开(公告)日：2014-03-11

    申请号：US13253412

    申请日：2011-10-05

    申请人： Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang ,  Karl Molnar ,  Jung-Fu Cheng

    发明人： Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang ,  Karl Molnar ,  Jung-Fu Cheng

    IPC分类号： H04B7/02

    CPC分类号： H04B1/712 ,  H04B1/7103 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/7107 ,  H04B1/71072 ,  H04B7/04 ,  H04B7/0684 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0048 ,  H04L1/18 ,  H04L25/021 ,  H04L25/0224 ,  H04L25/03012 ,  H04L25/03318 ,  H04L25/03331 ,  H04W52/16 ,  H04W52/325 ,  H04W52/346 ,  H04W52/42

    摘要： A wireless communication receiver improves signal impairment correlation estimation in MIMO/MISO systems by considering different transmit power allocations and different transmit antenna power distributions in its impairment correlation calculations. The receiver may be implemented in according to a variety of architectures, including, but not limited to, Successive Interference Cancellation (SIC) Generalized RAKE (G-RAKE), Joint Detection (JD) G-RAKE, and Minimum Mean Squared Error (MMSE) G-RAKE. Regardless of the particular receiver architecture adopted, the improved impairment correlations may be used to calculate improved (RAKE) signal combining weights and/or improve channel quality estimates for reporting by receivers operating in Wideband CDMA (W-CDMA) systems transmitting HSDPA channels via MIMO or MISO transmitters. A transmitter may be configured to facilitate impairment correlation determinations by wireless communication receivers operating in MIMO/MISO environments, by signaling one or more values, e.g., data-to-pilot signal transmit power ratios and/or transmit antenna power distributions for the data and pilot signals.

    摘要翻译： 无线通信接收机通过在损伤相关计算中考虑不同的发射功率分配和不同的发射天线功率分布来改善MIMO / MISO系统中的信号损害相关估计。 接收机可以根据各种架构来实现，包括但不限于连续干扰消除（SIC）广义RAKE（G-RAKE），联合检测（JD）G-RAKE和最小均方误差（MMSE） ）G-RAKE。 不考虑所采用的特定接收机架构，改进的损害相关可以用于计算改进的（RAKE）信号组合权重和/或改善用于在通过MIMO发送HSDPA信道的宽带CDMA（W-CDMA）系统中操作的接收机报告的信道质量估计 或MISO发射机。 发射机可以被配置为通过信令一个或多个值（例如数据到导频信号发射功率比和/或数据的发射天线功率分布）来促进在MIMO / MISO环境中操作的无线通信接收机的损害相关确定，以及 导频信号。

    MULTIPLE-INPUT, MULTIPLE-OUTPUT COMMUNICATION SYSTEM WITH REDUCED FEEDBACK
    5.
    发明申请
    MULTIPLE-INPUT, MULTIPLE-OUTPUT COMMUNICATION SYSTEM WITH REDUCED FEEDBACK 有权
    多输入多输出通信系统，减少反馈

    公开(公告)号：US20120114060A1

    公开(公告)日：2012-05-10

    申请号：US11740417

    申请日：2007-04-26

    申请人： Kambiz C. Zangi ,  Leonid Krasny

    发明人： Kambiz C. Zangi ,  Leonid Krasny

    IPC分类号： H04B15/00 ,  H04L25/03

    CPC分类号： H04B7/0417 ,  H04B7/043 ,  H04B7/0634 ,  H04B7/0691

    摘要： In MIMO systems, two or more transmit signals are transmitted from different antenna clusters having one or more transmit antennas each. A precoding circuit weight the transmit signals transmitted from each transmit antenna using a common set of frequency independent antenna weights for all antenna clusters. The antenna weights are computed based on correlations between transmit antennas in the same antenna cluster.

    摘要翻译： 在MIMO系统中，从具有一个或多个发射天线的不同天线簇发射两个或更多个发射信号。 预编码电路使用对于所有天线簇的共用的一组独立于频率的天线权重对从每个发射天线发射的发射信号进行加权。 基于相同天线簇中的发射天线之间的相关性来计算天线权重。

    SYSTEMS AND METHOD FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSIONS
    6.
    发明申请
    SYSTEMS AND METHOD FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSIONS 有权
    用于协调多点下行链路传输的系统和方法

    公开(公告)号：US20120100877A1

    公开(公告)日：2012-04-26

    申请号：US13335482

    申请日：2011-12-22

    申请人： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    发明人： Kambiz Zangi ,  Dennis Hui ,  Leonid Krasny

    IPC分类号： H04W24/02

    CPC分类号： H04B7/024

    摘要： A method for determining antenna weights for use in transmitting data from a plurality of base stations to a user device is disclosed. The antenna weights are determined using an input covariance matrix (S), and the input covariance matrix is determined subject to a predetermined power constraint and a predetermined, non-zero interference constraint.

    摘要翻译： 公开了一种用于确定用于从多个基站向用户设备发送数据的天线权重的方法。 使用输入协方差矩阵（S）确定天线权重，并且在预定功率约束和预定的非零干扰约束条件下确定输入协方差矩阵。

    System and apparatus for interference suppression using macrodiversity in mobile wireless networks
    7.
    发明授权
    System and apparatus for interference suppression using macrodiversity in mobile wireless networks 有权
    用于移动无线网络中使用宏分集的干扰抑制的系统和装置

    公开(公告)号：US07983623B2

    公开(公告)日：2011-07-19

    申请号：US12129918

    申请日：2008-05-30

    申请人： Kumar Balachandran ,  Leonid Krasny

    发明人： Kumar Balachandran ,  Leonid Krasny

    IPC分类号： H04B1/00 ,  H04B7/00

    CPC分类号： H04B7/024 ,  H04B7/022 ,  H04B7/0408 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/0663 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0693 ,  H04L25/0216 ,  H04L25/03343 ,  H04W16/28 ,  H04W28/18 ,  H04W52/143 ,  H04W52/367 ,  H04W52/40 ,  H04W92/20

    摘要： In a wireless network, plural downlink signals from plural base stations are transmitted to a terminal. The plural downlink signals all carry the same information to the terminal. The terminal provides feedback on the downlink channels. The feedback provides information on the taps of the channels. The amount of information fed back is constrained. Based on the feedback, transmission parameters of the downlink signals are adjusted. The process of transmitting, providing feedback, and adjusting the parameters continue so that the energy of the downlink signal is enhanced at the terminal location and suppressed elsewhere. Beam forming can be used to further suppress the energy signature at locations other than the terminal location.

    摘要翻译： 在无线网络中，来自多个基站的多个下行链路信号被发送到终端。 多个下行链路信号都携带相同的信息给终端。 终端提供对下行链路信道的反馈。 反馈提供有关通道的抽头的信息。 反馈的信息量受到限制。 基于反馈，调整下行链路信号的传输参数。 发送，提供反馈和调整参数的过程继续进行，使得下行链路信号的能量在终端位置得到增强，并在其他地方被抑制。 波束形成可用于进一步抑制终端位置之外的位置处的能量特征。

    Method and apparatus for generating channel quality information for wireless communication
    8.
    发明授权
    Method and apparatus for generating channel quality information for wireless communication 有权
    用于生成用于无线通信的信道质量信息的方法和装置

    公开(公告)号：US07912433B2

    公开(公告)日：2011-03-22

    申请号：US12750793

    申请日：2010-03-31

    申请人： Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

    发明人： Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

    IPC分类号： H04B17/00

    CPC分类号： H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

    摘要： A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

    摘要翻译： 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

    Method and Apparatus for Generating Channel Quality Information for Wireless Communication
    9.
    发明申请
    Method and Apparatus for Generating Channel Quality Information for Wireless Communication 有权
    用于生成无线通信信道质量信息的方法和装置

    公开(公告)号：US20100183064A1

    公开(公告)日：2010-07-22

    申请号：US12750793

    申请日：2010-03-31

    申请人： Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

    发明人： Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

    IPC分类号： H04B17/00

    CPC分类号： H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

    摘要： A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

    摘要翻译： 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。