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    Method and apparatus for monitoring transmission quality
    61.
    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：US07643546B2

    公开(公告)日：2010-01-05

    申请号：US11498287

    申请日：2006-08-01

    Applicant: Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

    Inventor： Tao Chen ,  Fuyun Ling ,  Edward G. Tiedemann, Jr.

    IPC: H04L1/20

    CPC classification number: H04B17/327 ,  H04B17/309

    Abstract: 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.

    Abstract translation: 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。

    Iterative channel and interference estimation and decoding
    62.
    发明授权
    Iterative channel and interference estimation and decoding 有权
    迭代通道和干扰估计与解码

    公开(公告)号：US07421041B2

    公开(公告)日：2008-09-02

    申请号：US10791342

    申请日：2004-03-01

    Applicant: Aamod Khandekar ,  Avneesh Agrawal ,  Fuyun Ling

    Inventor： Aamod Khandekar ,  Avneesh Agrawal ,  Fuyun Ling

    IPC: H03K9/00

    CPC classification number: H04L1/005 ,  H04L1/0071 ,  H04L25/0238 ,  H04L25/03171

    Abstract: For an iterative channel and interference estimation and decoding scheme, prior information for channel gain and interference is initially obtained based on received pilot symbols. Forward information for code bits corresponding to received data symbols is derived based on the received data symbols and the prior information and then decoded to obtain feedback information for the code bits corresponding to the received data symbols. A posteriori information for channel gain and interference for each received data symbol is derived based on the feedback information for that received data symbol. The a posteriori information for the received data symbols and the prior information are combined to obtain updated information for channel gain and interference for each received data symbol. The process can be repeated for any number of iterations. The prior, a posteriori, and updated information may be represented by joint probability distributions on channel gain and interference. The forward and feedback information may be represented by log-likelihood ratios.

    Abstract translation: 对于迭代信道和干扰估计和解码方案，首先基于接收到的导频符号获得用于信道增益和干扰的先验信息。 基于接收到的数据符号和先验信息导出与接收到的数据符号相对应的码位的转发信息，然后解码以获得与接收的数据符号对应的码位的反馈信息。 基于该接收到的数据符号的反馈信息导出每个接收到的数据符号的信道增益和干扰的后验信息。 组合接收到的数据符号和先验信息的后验信息以获得每个接收到的数据符号的信道增益和干扰的更新信息。 该过程可以重复任意次数的迭代。 先前的，后验的和更新的信息可以由通道增益和干扰的联合概率分布来表示。 正向和反馈信息可以由对数似然比表示。

    Position location using transmitters with timing offset
    64.
    发明申请
    Position location using transmitters with timing offset 审中-公开
    使用定时偏移的发射机定位位置

    公开(公告)号：US20070072621A1

    公开(公告)日：2007-03-29

    申请号：US11327536

    申请日：2006-01-05

    Applicant: Krishna Mukkavilli ,  Fuyun Ling ,  Gordon Walker

    Inventor： Krishna Mukkavilli ,  Fuyun Ling ,  Gordon Walker

    IPC: H04Q7/20

    CPC classification number: H04L27/2655 ,  G01S5/021 ,  G01S5/0226 ,  G01S5/14 ,  H04L27/2607 ,  H04L27/2646 ,  H04W64/00

    Abstract: Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.

    Abstract translation: 提供了用于确定无线网络中的位置信息的系统和方法。 在一个实施例中，在多个发射机和一个或多个接收机之间传送定时偏移信息。 这样的信息使得可以进行精确的位置或位置确定，从而考虑整个网络的时序差异。 在另一个实施例中，进行发射机相位调整，其推进或延迟来自发射机的传输以考虑接收机处的潜在时序差异。 在另一个实施例中，可以在无线网络中采用定时偏移通信和/或发射机相位调整的组合以便于位置定位确定。

    Position location using transmitters with timing offset and phase adjustment
    65.
    发明申请
    Position location using transmitters with timing offset and phase adjustment 有权
    使用定时偏移和相位调整的发射机定位位置

    公开(公告)号：US20070069953A1

    公开(公告)日：2007-03-29

    申请号：US11327535

    申请日：2006-01-05

    Applicant: Fuyun Ling ,  Gordon Walker ,  Krishna Mukkavilli

    Inventor： Fuyun Ling ,  Gordon Walker ,  Krishna Mukkavilli

    IPC: H04L7/00 ,  G01S1/24 ,  G01S3/02

    CPC classification number: G01S5/021 ,  G01S5/0226 ,  G01S5/10 ,  G01S5/14

    Abstract: Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.

    Abstract translation: 提供了用于确定无线网络中的位置信息的系统和方法。 在一个实施例中，在多个发射机和一个或多个接收机之间传送定时偏移信息。 这样的信息使得可以进行精确的位置或位置确定，从而考虑整个网络的时序差异。 在另一个实施例中，进行发射机相位调整，其推进或延迟来自发射机的传输以考虑接收机处的潜在时序差异。 在另一个实施例中，可以在无线网络中采用定时偏移通信和/或发射机相位调整的组合以便于位置定位确定。

    Method and apparatus for monitoring transmission quality
    66.
    发明申请
    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：US20060268968A1

    公开(公告)日：2006-11-30

    申请号：US11498287

    申请日：2006-08-01

    Applicant: Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

    Inventor： Tao Chen ,  Fuyun Ling ,  Edward Tiedemann

    IPC: H04B17/00

    CPC classification number: H04B17/327 ,  H04B17/309

    Abstract: 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.

    Abstract translation: 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。

    Method to track analog gain step magnitudes online during operation of wireless mobile devices
    68.
    发明申请
    Method to track analog gain step magnitudes online during operation of wireless mobile devices 有权
    在无线移动设备操作期间在线跟踪模拟增益步幅的方法

    公开(公告)号：US20060215793A1

    公开(公告)日：2006-09-28

    申请号：US11373369

    申请日：2006-03-10

    Applicant: Linbo Li ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    Inventor： Linbo Li ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    IPC: H04L27/08

    CPC classification number: H03G3/3052 ,  H03F1/0205 ,  H03F3/24 ,  H03F2200/294 ,  H03F2200/372 ,  H03G1/0088 ,  H03G3/3068 ,  H04B1/109

    Abstract: Systems and methods are provided for tracking and compensating for analog gain mismatches or changes in a receiver. In an embodiment, a method is provided to track analog gain step magnitudes during operation of a device. The method includes employing an error signal between an automatic gain control (AGC) output and a reference level as input to a gain step magnitude tracking component. This also includes determining at least one compensation value from the AGC output to update a nominal gain step magnitude that tracks an actual gain step magnitude.

    Abstract translation: 提供系统和方法来跟踪和补偿接收机中的模拟增益失配或变化。 在一个实施例中，提供了一种用于在设备操作期间追踪模拟增益步幅的方法。 该方法包括采用自动增益控制（AGC）输出和参考电平之间的误差信号作为增益步长跟踪分量的输入。 这还包括从AGC输出确定至少一个补偿值以更新追踪实际增益步幅的标称增益步幅。

    Apparatus and method for determining sleep clock timing
    69.
    发明申请
    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：US20060205382A1

    公开(公告)日：2006-09-14

    申请号：US11271409

    申请日：2005-11-09

    Applicant: Michael Wang ,  Fuyun Ling ,  Rajiv Vijayan

    Inventor： Michael Wang ,  Fuyun Ling ,  Rajiv Vijayan

    IPC: H04B1/16

    CPC classification number: H04W52/029 ,  Y02D70/00

    Abstract: 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.

    Abstract translation: 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。

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