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    METHODS AND APPARATUS FOR POSITION LOCATION IN A WIRELESS NETWORK
    62.
    发明申请
    METHODS AND APPARATUS FOR POSITION LOCATION IN A WIRELESS NETWORK 有权
    无线网络中位置定位的方法和设备

    公开(公告)号：US20090117917A1

    公开(公告)日：2009-05-07

    申请号：US12338901

    申请日：2008-12-18

    申请人： Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

    发明人： Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

    IPC分类号： H04W24/00

    CPC分类号： G01S5/0205 ,  H04L5/0053 ,  H04W24/00 ,  H04W64/00

    摘要： Methods and apparatus for position location in a wireless network. In an aspect, a method is provided that includes determining whether a symbol to be transmitted is an active symbol, wherein the symbol comprises a plurality of subcarriers, and encoding identification information on a first portion of subcarriers if it is determined that the symbol is the active symbol. The method also includes encoding idle information on a second portion of subcarriers if it is determined that the symbol in not the active symbol. In an aspect, an apparatus includes detector logic configured to decode a plurality of symbols to determine identification information that identifies a plurality of transmitters, and to determine a plurality of channel estimate associated with the plurality of transmitters. The apparatus also includes position determination logic configured to calculate a device position based on the plurality of transmitters and the plurality of channel estimates.

    摘要翻译： 无线网络中位置定位的方法和装置。 一方面，提供了一种方法，其包括确定要发送的符号是否是活动符号，其中，所述符号包括多个子载波，并且如果确定所述符号是所述符号是所述符号，则对所述子载波的第一部分编码识别信息 活动符号 如果确定不在活动符号中的符号，则该方法还包括对子载波的第二部分上的空闲信息进行编码。 一方面，一种装置包括检测器逻辑，其被配置为对多个符号进行解码以确定标识多个发射机的识别信息，并且确定与多个发射机相关联的多个信道估计。 该装置还包括位置确定逻辑，其被配置为基于多个发射机和多个信道估计来计算设备位置。

    Apparatus and method for determining sleep clock timing
    63.
    发明授权
    Apparatus and method for determining sleep clock timing 失效
    用于确定睡眠时钟定时的装置和方法

    公开(公告)号：US07463910B2

    公开(公告)日：2008-12-09

    申请号：US11271409

    申请日：2005-11-09

    申请人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

    发明人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

    IPC分类号： H04M1/00 ,  H04B1/16

    CPC分类号： H04W52/029 ,  Y02D70/00

    摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.

    摘要翻译： 通过选择性地利用估计的睡眠时钟频率和睡眠时钟频率的估计改变来估计睡眠或慢时钟的频率的装置和方法。 所公开的装置包括：睡眠时钟频率估计器，用于输出快速时钟导出的睡眠时钟频率估计;以及睡眠时钟变化频率估计器，用于输出睡眠时钟的频率变化的估计。 该装置还包括组合器，其对至少一个快速时钟导出的睡眠时钟频率估计进行加权以获得加权睡眠时钟频率估计和睡眠时钟的频率变化的估计，以获得频率变化的加权估计 的睡眠时钟。 组合器还使用加权睡眠时钟频率估计和睡眠时钟的频率变化的加权估计中的至少一个来确定睡眠时钟频率的新估计。 还公开了互补方法。

    Evaluation of transmitter performance
    64.
    发明申请
    Evaluation of transmitter performance 失效
    发射机性能评估

    公开(公告)号：US20070071122A1

    公开(公告)日：2007-03-29

    申请号：US11361085

    申请日：2006-02-22

    申请人： Fuyun Ling ,  Durk Van Veen ,  Murali Chari ,  Thomas Sun

    发明人： Fuyun Ling ,  Durk Van Veen ,  Murali Chari ,  Thomas Sun

    IPC分类号： H04K1/10

    CPC分类号： H04L5/023 ,  H04B17/13 ,  H04B17/391 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0232 ,  H04L27/0012

    摘要： Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. A signal analyzer can be used to sample the output of a transmitter and the sampled signal can be propagated to a processor. The processor can generate frequency domain channel estimates for the subcarriers. If the transmitted modulation symbols are unknown, the processor can determine the modulation symbols and use the determined modulation symbols to calculate the channel estimates. The channel estimates can be averaged and used to generate various metrics to evaluate the transmitter performance.

    摘要翻译： 描述了便于在无线通信环境中监视发射机性能的系统和方法。 信号分析仪可用于对发射机的输出采样，采样信号可以传播到处理器。 处理器可以产生子载波的频域信道估计。 如果发送的调制符号是未知的，则处理器可以确定调制符号并使用确定的调制符号来计算信道估计。 信道估计可以被平均化并用于生成各种度量以评估发射机的性能。

    Modulation type determination for evaluation of transmitter performance
    65.
    发明申请
    Modulation type determination for evaluation of transmitter performance 审中-公开
    用于评估发射机性能的调制类型确定

    公开(公告)号：US20070070877A1

    公开(公告)日：2007-03-29

    申请号：US11361088

    申请日：2006-02-22

    申请人： Thomas Sun ,  Durk Van Veen ,  Fuyun Ling ,  Murali Ramaswamy Chari

    发明人： Thomas Sun ,  Durk Van Veen ,  Fuyun Ling ,  Murali Ramaswamy Chari

    IPC分类号： H04J11/00

    CPC分类号： H04L27/0012 ,  H04L25/0206 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2601 ,  H04L27/2647

    摘要： Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. If the received modulation symbols are unknown during transmitter monitoring, it may be necessary to determine the modulation symbols for each subcarrier. The modulation types can be evaluated over a subset of subcarriers having a consistent modulation type, to reduce the possibility of an erroneous modulation type determination to an extremely low level. A metric can be generated for each modulation type that indicates the likelihood of a particular modulation type for the subset of subcarriers. The modulation type can be selected based upon the metric and modulation symbols consistent with the modulation type can be used for the subset of subcarriers.

    摘要翻译： 描述了便于在无线通信环境中监视发射机性能的系统和方法。 如果在发射机监控期间接收到的调制符号是未知的，则可能需要确定每个子载波的调制符号。 调制类型可以在具有一致调制类型的子载波的子集上进行评估，以将错误调制类型确定的可能性降低到非常低的水平。 可以为指示子载波子集的特定调制类型的可能性的每种调制类型生成度量。 可以基于度量来选择调制类型，并且可以将与调制类型一致的调制符号用于子载波的子集。

    Bit log likelihood ratio evaluation
    66.
    发明申请
    Bit log likelihood ratio evaluation 失效
    位对数似然比评估

    公开(公告)号：US20060178755A1

    公开(公告)日：2006-08-10

    申请号：US11330652

    申请日：2006-01-11

    申请人： Fuyun Ling ,  Seong Chung ,  Jinxia Bai ,  Thomas Sun

    发明人： Fuyun Ling ,  Seong Chung ,  Jinxia Bai ,  Thomas Sun

    IPC分类号： G05B15/00

    CPC分类号： H04L27/3488 ,  H04L1/0045 ,  H04L1/0065 ,  H04L1/0066 ,  H04L27/2604 ,  H04L2001/0098

    摘要： A system and method are provided for generating bit log likelihood ratio (LLR) values for two-layered Quadrature Phase-Shift Keying (QPSK) turbo decoding in a wireless communications user terminal (UT). The method includes receiving a two-layered QPSK signal with an energy ratio that is unknown, but typically defined as either k12 or k22. The method selects a mismatched energy ratio (k2) between k12 and k22, and generating bit LLR values for two-layered QPSK turbo decoding, using the mismatched k2 energy ratio. For example, if the received two-layered QPSK signal is known to have an energy ratio of about 4 or about 6.25. Then, k2 is selected to be about 5.0625. Alternately stated, the mismatched k2 energy ratio in selected by determining the approximate midpoint between k12 and k22.

    摘要翻译： 提供了一种用于在无线通信用户终端（UT）中生成用于双层正交相移键控（QPSK）turbo解码的比特对数似然比（LLR）值的系统和方法。 该方法包括以未知的能量比接收两层QPSK信号，但通常被定义为k1≤2或k2≥2。 该方法选择k1 <2> 2和k2 <2>之间的不匹配能量比（k <2> 2），并为双层QPSK涡轮增益产生位LLR值 使用不匹配的k <2>能量比进行解码。 例如，如果已知所接收的两层QPSK信号具有约4或约6.25的能量比。 然后，选择k <2>为约5.0625。 或者说，通过确定k1 <2> 2和k2 <2>之间的近似中点，所选择的不匹配的k 2 2能量比。

    Method and apparatus for monitoring transmission quality
    68.
    发明授权
    Method and apparatus for monitoring transmission quality 失效
    监测传输质量的方法和装置

    公开(公告)号：US06967998B1

    公开(公告)日：2005-11-22

    申请号：US09438988

    申请日：1999-11-12

    申请人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

    发明人： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

    IPC分类号： H04B7/26 ,  H04B17/00 ,  H04W28/04 ,  H04L1/20

    CPC分类号： H04B17/327 ,  H04B17/309

    摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.

    摘要翻译： 在无线通信中，需要监控通信信道的传输质量，保持系统的性能和运行。 本发明提供了一种在接收机中测量信道中的比特错误率的方法，而不会通过将质量监视数据插入到发射机的信号中来减少信道吞吐量。

    Systems and methods for frequency acquisition in a wireless communication network
    70.
    发明申请
    Systems and methods for frequency acquisition in a wireless communication network 审中-公开
    无线通信网络中频率采集的系统和方法

    公开(公告)号：US20050163263A1

    公开(公告)日：2005-07-28

    申请号：US11021028

    申请日：2004-12-22

    申请人： Alok Gupta ,  Fuyun Ling

    发明人： Alok Gupta ,  Fuyun Ling

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2665 ,  H04L7/007 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2675 ,  H04L27/2695

    摘要： The disclosed embodiments provide for methods and systems for initial frequency acquisition in a wireless communication network. In one aspect, a method for initial frequency acquisition includes the acts of receiving a stream of input samples from a transmitter, determining an estimate for a frequency offset associated with the transmitter and the receiver based on the received input samples, and compensating for the frequency offset to achieve an initial frequency acquisition.

    摘要翻译： 所公开的实施例提供了用于无线通信网络中的初始频率采集的方法和系统。 一方面，一种用于初始频率获取的方法包括从发射机接收输入样本流的动作，基于接收到的输入样本确定与发射机和接收机相关联的频率偏移的估计，并补偿频率 偏移以实现初始频率采集。