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1. 发明申请

US20070116102A1 METHOD AND APPARATUS FOR DEMODULATING SIGNALS PROCESSED IN A TRANSMIT DIVERSITY MODE 有权
公开(公告)号：US20070116102A1
公开(公告)日：2007-05-24
申请号：US11624198
申请日：2007-01-17
申请人： Douglas Rowitch , Way-Shing Lee , Thunyachate Ekvetchavit
发明人： Douglas Rowitch , Way-Shing Lee , Thunyachate Ekvetchavit
IPC分类号： H04B1/00
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.

2. 发明申请

US20070116101A1 METHOD AND APPARATUS FOR DEMODULATING SIGNALS PROCESSED IN A TRANSMIT DIVERSITY MODE 有权
标题翻译：用于在发射多样性模式下处理信号的方法和装置
公开(公告)号：US20070116101A1
公开(公告)日：2007-05-24
申请号：US11624194
申请日：2007-01-17
申请人： Douglas Rowitch , Way-Shing Lee , Thunyachate Ekvetchavit
发明人： Douglas Rowitch , Way-Shing Lee , Thunyachate Ekvetchavit
IPC分类号： H04B1/00
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。

3. 发明授权

US08570220B2 Navigation receiver 有权
标题翻译：导航接收机
公开(公告)号：US08570220B2
公开(公告)日：2013-10-29
申请号：US13276252
申请日：2011-10-18
申请人： Liang Zhao , Michael Kohlmann , Paul A. Conflitti , Roger Brockenbrough , Cormac S. Conroy , Leonid Sheynblat , Douglas Rowitch
发明人： Liang Zhao , Michael Kohlmann , Paul A. Conflitti , Roger Brockenbrough , Cormac S. Conroy , Leonid Sheynblat , Douglas Rowitch
IPC分类号： G01S19/36 , G01S19/09
CPC分类号： G01S19/36 , G01S19/25 , G01S19/32 , G01S19/33
摘要： The subject matter disclosed herein relates to a system and method for processing navigation signals received from multiple global navigation satellite systems (GNSS′). In a particular implementation, signals received from multiple GNSS′ may be processed in a single receiver channel.
摘要翻译：本文公开的主题涉及用于处理从多个全球导航卫星系统（GNSS'）接收的导航信号的系统和方法。在特定实现中，从多个GNSS接收的信号可以在单个接收机信道中进行处理。

4. 发明申请

US20060217130A1 Methods and systems for deriving seed position of a subscriber station in support of unassisted GPS-type position determination in a wireless communication system 有权
公开(公告)号：US20060217130A1
公开(公告)日：2006-09-28
申请号：US11244529
申请日：2005-10-05
申请人： Douglas Rowitch , Chang Row , Ann Tien , Sanjeev Khushu
发明人： Douglas Rowitch , Chang Row , Ann Tien , Sanjeev Khushu
IPC分类号： H04Q7/20
CPC分类号： G01S19/24 , G01S19/252 , H04W64/00
摘要： In a method and system for deriving a seed position of a subscriber station in a wireless communications system in supporting unassisted GPS-type position determination is provided, the subscriber station receives overhead messages from the wireless communications system, and derives the seed position from the parameter values. The subscriber station may use a data structure in its memory and map possible parameter values to corresponding positions that may serve as the seed positions.

5. 发明授权

US07096132B2 Procedure for estimating a parameter of a local maxima or minima of a function 有权
标题翻译：用于估计功能的局部最大值或最小值的参数的步骤
公开(公告)号：US07096132B2
公开(公告)日：2006-08-22
申请号：US10687478
申请日：2003-10-16
申请人： Christopher Patrick , Douglas Rowitch
发明人： Christopher Patrick , Douglas Rowitch
IPC分类号： G06F19/00
CPC分类号： G01S19/29 , G01S19/30 , H04B1/70757 , H04B2201/70715
摘要： A method of and system for estimating a parameter of a local maxima or minima of a function. An interpolated local maxima or minima is determined. An interpolation offset is then derived, comprising a deviation between locations of the interpolated and sampled local maxima or minima of the function. An estimate of the parameter is derived from the interpolation offset.
摘要翻译：一种用于估计功能的局部最大值或最小值的参数的方法和系统。确定内插局部最大值或最小值。然后导出内插偏移，包括内插和采样的局部最大值或函数的最小值的位置之间的偏差。参数的估计是从插补偏移中得出的。

6. 发明授权

US08044853B2 Navigation receiver 有权
标题翻译：导航接收机
公开(公告)号：US08044853B2
公开(公告)日：2011-10-25
申请号：US11962019
申请日：2007-12-20
申请人： Liang Zhao , Michael Kohlmann , Paul A. Conflitti , Roger Brockenbrough , Cormac S. Conroy , Leonid Sheynblat , Douglas Rowitch
发明人： Liang Zhao , Michael Kohlmann , Paul A. Conflitti , Roger Brockenbrough , Cormac S. Conroy , Leonid Sheynblat , Douglas Rowitch
IPC分类号： G01S19/24 , G01S19/09
CPC分类号： G01S19/36 , G01S19/25 , G01S19/32 , G01S19/33
摘要： The subject matter disclosed herein relates to a system and method for processing navigation signals received from multiple global navigation satellite systems (GNSS'). In a particular implementation, signals received from multiple GNSS' may be processed in a single receiver channel.
摘要翻译：本文公开的主题涉及用于处理从多个全球导航卫星系统（GNSS'）接收的导航信号的系统和方法。在特定实现中，从多个GNSS接收的信号可以在单个接收机信道中进行处理。

7. 发明申请

US20060222058A1 Systems, methods, and apparatus for jammer rejection 有权
标题翻译：用于干扰抑制的系统，方法和装置
公开(公告)号：US20060222058A1
公开(公告)日：2006-10-05
申请号：US11291173
申请日：2005-11-30
申请人： Emilija Simic , Douglas Rowitch , Christopher Patrick
发明人： Emilija Simic , Douglas Rowitch , Christopher Patrick
IPC分类号： H04B1/00
CPC分类号： G01S19/34 , G01S19/03 , G01S19/21 , G01S19/22 , G01S19/29 , H04B1/7077 , H04K3/228
摘要： A method according to an embodiment obtains a list of peaks for each of a number of frequency hypotheses. Each peak has an energy result and corresponds to a code phase hypothesis. Embodiments include methods and apparatus that may be used in identifying a location of a signal (such as a GPS signal) in a two-dimensional search space. Location information may be further applied to operations such as signal acquisition, signal tracking, position location of a receiver, and timing operations such as the synchronization of one or more other processes.
摘要翻译：根据实施例的方法获得多个频率假设中的每一个的峰值列表。每个峰值具有能量结果，并对应于码相位假设。实施例包括可用于识别二维搜索空间中的信号（例如GPS信号）的位置的方法和装置。位置信息可以进一步应用于诸如信号获取，信号跟踪，接收机的位置定位等操作，以及诸如一个或多个其他过程的同步的定时操作。

8. 发明授权

US06903684B1 Method and apparatus for optimizing GPS-based position location in presence of time varying frequency error 失效
标题翻译：在存在时变频率误差的情况下优化基于GPS的位置定位的方法和装置
公开(公告)号：US06903684B1
公开(公告)日：2005-06-07
申请号：US10404711
申请日：2003-03-31
申请人： Emilija Simic , Christopher Patrick , Douglas Rowitch
发明人： Emilija Simic , Christopher Patrick , Douglas Rowitch
IPC分类号： G01S19/09 , G01S19/46 , H04B7/185
CPC分类号： G01S19/235
摘要： Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn may affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is very important for position location, because poor quality GPS doppler measurements may prevent the wireless communication device from acquiring satellites in the most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use in position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a position location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and/or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
摘要翻译：无线通信设备的位置确定精度可能受到大量未计数的GPS多普勒偏倚的负面影响，这又可能影响由无线通信设备进行的GPS多普勒估计和GPS多普勒测量。 GPS多普勒测量的质量对于位置定位是非常重要的，因为差的质量GPS多普勒测量可能会阻止无线通信设备采集具有较窄频率范围的最敏感模式的卫星，这导致GPS伪距测量产量的降低。由于对GPS码相位测量时间的传播对其在位置位置计算中使用之前的公共时间的不利影响，大量未计数的GPS多普勒偏置也会对位置精度产生不利影响。在没有计算的CDMA码多普勒的情况下也是这样，通过对AFLT码相位测量时间传播的不利影响，在它们在位置定位引擎中使用之前的公共时间。这种效果是大型搜索窗口最大的问题。因此，本公开提供了一种在存在时变频率误差的情况下优化基于GPS的位置定位的方法，包括以下步骤：连续测量和/或计算所得到的GPS多普勒偏差和CDMA码多普勒偏差，然后将其不利影响最小化考虑到基于GPS多普勒偏置值重新定位GPS多普勒搜索窗口的位置定位，以及使用GPS多普勒偏差和CDMA码多普勒偏置值分别适当地将GPS伪距和AFLT导频相位测量传播到常见时间在使用位置引擎之前。

9. 发明授权

US07764726B2 Systems, methods, and apparatus for jammer rejection 有权
标题翻译：用于干扰抑制的系统，方法和装置
公开(公告)号：US07764726B2
公开(公告)日：2010-07-27
申请号：US11291173
申请日：2005-11-30
申请人： Emilija Simic , Douglas Rowitch , Christopher Patrick
发明人： Emilija Simic , Douglas Rowitch , Christopher Patrick
IPC分类号： H04B1/00
CPC分类号： G01S19/34 , G01S19/03 , G01S19/21 , G01S19/22 , G01S19/29 , H04B1/7077 , H04K3/228
摘要： A method according to an embodiment obtains a list of peaks for each of a number of frequency hypotheses. Each peak has an energy result and corresponds to a code phase hypothesis. Embodiments include methods and apparatus that may be used in identifying a location of a signal (such as a GPS signal) in a two-dimensional search space. Location information may be further applied to operations such as signal acquisition, signal tracking, position location of a receiver, and timing operations such as the synchronization of one or more other processes.
摘要翻译：根据实施例的方法获得多个频率假设中的每一个的峰值列表。每个峰值具有能量结果，并对应于码相位假设。实施例包括可用于识别二维搜索空间中的信号（例如GPS信号）的位置的方法和装置。位置信息可以进一步应用于诸如信号获取，信号跟踪，接收机的位置定位等操作，以及诸如一个或多个其他过程的同步的定时操作。

10. 发明申请

US20060121915A1 System, method, and apparatus for correction of code doppler shift 失效
公开(公告)号：US20060121915A1
公开(公告)日：2006-06-08
申请号：US10404715
申请日：2003-03-31
申请人： Christopher Patrick , Douglas Rowitch , Pillappakkam Srinivas
发明人： Christopher Patrick , Douglas Rowitch , Pillappakkam Srinivas
IPC分类号： H04M1/00
CPC分类号： H04B1/707 , G01S19/29 , H04L2027/0065
摘要： A method of signal reception according to one embodiment of the invention includes compensating for an estimated or measured Doppler shift during integration of a correlated signal. Such a method also includes determining a composite peak position and correcting this position based on the compensation.

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