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    METHOD AND APPARATUS FOR MULTIPATH MITIGATION
    12.
    发明申请
    METHOD AND APPARATUS FOR MULTIPATH MITIGATION 失效
    用于多路减速的方法和装置

    公开(公告)号：US20100135365A1

    公开(公告)日：2010-06-03

    申请号：US12326001

    申请日：2008-12-01

    申请人： Shiou-Hung Chen ,  Grant Alexander Marshall ,  Emilija M. Simic ,  Douglas Neal Rowitch ,  Rayman Wai Pon

    发明人： Shiou-Hung Chen ,  Grant Alexander Marshall ,  Emilija M. Simic ,  Douglas Neal Rowitch ,  Rayman Wai Pon

    IPC分类号： H04B1/00 ,  H04B1/10

    CPC分类号： H04B1/7113 ,  G01S19/22 ,  H04B2201/70715

    摘要： An apparatus and method for short multipath mitigation. In one aspect the method comprises subtracting a first stronger path from a correlation function to obtain a first residual signal, wherein one component of the first residual signal is a weaker path; applying reconstruction on the first residual signal to obtain a first reconstructed weaker path; subtracting the first reconstructed weaker path from the correlation function to obtain a second residual signal; and applying reconstruction on the second residual signal to obtain a second stronger path. In one aspect, the apparatus includes an antenna for receiving a composite receive RF signal, a receiver front-end for converting the composite receive RF signal into a composite receive digital signal; and a processor for performing signal correlation on the composite receive digital signal to obtain a correlation function and for processing the correlation function to obtain a desired signal. In one aspect, the short multipath is identified by computing a Left Edge Height Ratio Indicator (LEHRI).

    摘要翻译： 一种用于短多径减轻的装置和方法。 在一个方面，该方法包括从相关函数中减去第一较强路径以获得第一残差信号，其中第一残差信号的一个分量是较弱的路径; 对第一残差信号应用重建以获得第一重建较弱路径; 从所述相关函数中减去所述第一重建较弱路径以获得第二残差信号; 以及对所述第二残差信号应用重建以获得第二较强路径。 一方面，该装置包括用于接收复合接收RF信号的天线，用于将复合接收RF信号转换成复合接收数字信号的接收机前端; 以及处理器，用于对复合接收数字信号执行信号相关，以获得相关函数，并用于处理相关函数以获得期望的信号。 在一个方面，通过计算左边缘高度比指示符（LEHRI）来识别短多径。

    Method and apparatus for demodulating signals processed in a transmit diversity mode
    13.
    发明授权
    Method and apparatus for demodulating signals processed in a transmit diversity mode 有权
    用于解调以发射分集模式处理的信号的方法和装置

    公开(公告)号：US07684474B2

    公开(公告)日：2010-03-23

    申请号：US11624198

    申请日：2007-01-17

    申请人： Douglas Neal Rowitch ,  Way-Shing Lee ,  Thunyachate Ekvetchavit

    发明人： Douglas Neal Rowitch ,  Way-Shing Lee ,  Thunyachate Ekvetchavit

    IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

    CPC分类号： H04B1/70751 ,  H04B1/70752 ,  H04B1/708 ,  H04B1/709 ,  H04B7/0613 ,  H04J13/004

    摘要： Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically receives and despreads input samples (which are generated from the received signal) with a respective despreading sequence to provide despread samples. Each correlator then decovers the despread samples to provide decovered “half-symbols” and further demodulates the decovered half-symbols with pilot estimates to generate correlated symbols. The decovering is performed with a Walsh symbol having a length (T) that is half the length (2T) of a Walsh symbol used to cover the data symbols in the transmitted signal. The combiner selectively combines correlated symbols from the assigned correlators to provide demodulated symbols. One or more correlators can be assigned to process one or more instances of each transmitted signal. The pilot estimates used within each assigned correlator to demodulate the decovered half-symbols are generated based on the signal instance being processed by that correlator.

    摘要翻译： 用于在无线通信系统中处理接收信号的解调器架构。 解调器包括耦合到组合器的多个相关器。 每个相关器通常以相应的解扩序列接收和解扩输入采样（其从接收信号产生），以提供解扩样本。 每个相关器然后解码解扩样本以提供去除的“半符号”，并且用导频估计进一步解调已解除的半符号以产生相关符号。 使用具有用于覆盖发送信号中的数据符号的沃尔什符号的长度（2T）的一半的长度（T）的沃尔什符号执行解复用。 组合器选择性地组合来自所分配的相关器的相关符号以提供解调符号。 可以分配一个或多个相关器来处理每个发射信号的一个或多个实例。 在每个分配的相关器内使用的导频估计是根据该相关器正在处理的信号实例产生的。

    Radio Frequency (RF) Signal Multiplexing
    14.
    发明申请
    Radio Frequency (RF) Signal Multiplexing 有权
    射频（RF）信号复用

    公开(公告)号：US20090274079A1

    公开(公告)日：2009-11-05

    申请号：US12431683

    申请日：2009-04-28

    申请人： Ashok Bhatia ,  Dominic Gerard Farmer ,  Douglas Neal Rowitch ,  Doulgas Grover ,  Arie Rahmat ,  Chang Shik Row

    发明人： Ashok Bhatia ,  Dominic Gerard Farmer ,  Douglas Neal Rowitch ,  Doulgas Grover ,  Arie Rahmat ,  Chang Shik Row

    IPC分类号： H04B7/00

    CPC分类号： H04B1/403 ,  H04B1/3805

    摘要： In a radio frequency (RF) receiver, a receiver RF chain is tuned to a first (e.g., global positioning system (GPS)) channel to permit receipt of a first (e.g., GPS) signal over the first (e.g., GPS) channel on the receiver RF chain during a first time duration. The receiver RF chain is tuned to a second (e.g., cellular page) channel to permit receipt of a second (e.g., cellular page) signal over the second (e.g., cellular page) channel on the receiver RF chain during a second time duration, following the first time duration. The first (e.g., GPS) signal is processed during the first time duration and the second time duration, without any apparent interruption of the first (e.g., GPS) signal during the second time duration. The processing, for example, treats the actual interruption as a temporary, short term fade of the first (e.g., GPS) signal during the second time duration, or provides a bridge signal (e.g., an estimated GPS signal on the receiver RF chain or an actual GPS signal received on another receiver RF chain) during the second time duration.

    摘要翻译： 在射频（RF）接收机中，接收器RF链被调谐到第一（例如，全球定位系统（GPS））信道，以允许在第一（例如，GPS）信道上接收第一（例如，GPS）信号 在第一时间段内在接收机RF链上。 接收机RF链被调谐到第二（例如，蜂窝页）信道，以允许在第二持续时间期间在接收机RF链上的第二（例如，蜂窝页）信道上接收第二（例如，蜂窝页）信号， 按照第一次持续时间。 在第一持续时间和第二持续时间期间处理第一（例如，GPS）信号，而在第二持续时间期间没有第一（例如，GPS）信号的明显中断。 例如，该处理将实际中断视为在第二持续时间期间第一（例如，GPS）信号的临时短期衰落，或提供桥接信号（例如，接收机RF链上的估计的GPS信号或 在另一个接收机RF链上接收的实际GPS信号）。

    Method and Apparatus for Establishing a Wireless Network Signal Acquisition Rate
    15.
    发明申请
    Method and Apparatus for Establishing a Wireless Network Signal Acquisition Rate 审中-公开
    建立无线网络信号采集率的方法和装置

    公开(公告)号：US20090156205A1

    公开(公告)日：2009-06-18

    申请号：US11958257

    申请日：2007-12-17

    申请人： Douglas Neal Rowitch

    发明人： Douglas Neal Rowitch

    IPC分类号： H04Q7/20

    CPC分类号： H04W48/16 ,  H04W36/32

    摘要： Methods and apparatuses are provided for use by, or use with or in, a portable wireless device that allow for a wireless network signal acquisition rate to based, at least in part, on movement data associated with the portable wireless device.

    摘要翻译： 方法和装置被提供用于便携式无线设备的使用或使用或使用，其允许无线网络信号获取速率至少部分地基于与便携式无线设备相关联的移动数据。

    Systems, methods, and apparatus for frequency control
    19.
    发明授权
    Systems, methods, and apparatus for frequency control 有权
    用于频率控制的系统，方法和装置

    公开(公告)号：US08139685B2

    公开(公告)日：2012-03-20

    申请号：US11430613

    申请日：2006-05-08

    申请人： Emilija Simic ,  Christopher Patrick ,  Raghu Challa ,  Douglas Neal Rowitch

    发明人： Emilija Simic ,  Christopher Patrick ,  Raghu Challa ,  Douglas Neal Rowitch

    IPC分类号： H04L27/00

    CPC分类号： G01S19/235 ,  H04B1/26

    摘要： A receiver according to one embodiment includes a frequency control unit configured to receive a stream of samples including a plurality of received instances of a transmitted signal. The frequency control unit is configured to output a first correction signal (e.g. indicating a rotation) that is based on more than one of the received instances and a second correction signal (e.g. to control an oscillator) that is also based on more than one of the received instances. In some embodiments, a controlled oscillator is used to receive and/or transmit another signal, such as a signal received from a GPS space vehicle. In other embodiments, the received instances are from a GPS signal. In further embodiments, a fixed-frequency oscillator is used, and the second correction signal is used to receive and/or transmit another signal, such as a GPS signal.

    摘要翻译： 根据一个实施例的接收机包括：频率控制单元，被配置为接收包括发射信号的多个接收的实例的样本流。 频率控制单元被配置为输出基于多于一个接收到的实例的第一校正信号（例如指示旋转）和还基于多个接收实例中的多于一个的第二校正信号（例如，以控制振荡器） 接收的实例。 在一些实施例中，受控振荡器用于接收和/或发送另一信号，例如从GPS空中交通工具接收的信号。 在其他实施例中，所接收的实例来自GPS信号。 在另外的实施例中，使用固定频率振荡器，并且第二校正信号用于接收和/或发送诸如GPS信号的另一信号。

    System and/or Method for Determining Sufficiency of Pseudorange Measurements
    20.
    发明申请
    System and/or Method for Determining Sufficiency of Pseudorange Measurements 有权
    用于确定伪距测量足够的系统和/或方法

    公开(公告)号：US20100328149A1

    公开(公告)日：2010-12-30

    申请号：US12638900

    申请日：2009-12-15

    申请人： Rizwan E. Ahmed ,  Douglas Neal Rowitch

    发明人： Rizwan E. Ahmed ,  Douglas Neal Rowitch

    IPC分类号： G01S19/20

    CPC分类号： G01S19/24

    摘要： The subject matter disclosed herein relates to a system and method for determining a sufficiency of measurements for locating positions. In one example, although claimed subject matter is not so limited, a process to improve accuracy of pseudorange measurements may be terminated in response to a weighting of quantitative assessments of at least some of such pseudorange measurements.

    摘要翻译： 本文公开的主题涉及用于确定用于定位位置的测量的充分性的系统和方法。 在一个示例中，尽管所要求保护的主题不限于此，但是可以响应于至少一些这样的伪距测量的定量评估的加权来终止提高伪距测量的精度的过程。