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1. 发明授权

US07596190B2 System, method, and apparatus for correction of code doppler shift 失效
标题翻译：用于校正码多普勒频移的系统，方法和装置
公开(公告)号：US07596190B2
公开(公告)日：2009-09-29
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： H04L27/00 , H03K9/00
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.
摘要翻译：根据本发明的一个实施例的信号接收的方法包括在相关信号的积分期间补偿估计或测量的多普勒频移。这种方法还包括确定复合峰值位置并基于该补偿校正该位置。

2. 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.

3. 发明授权

US07649860B2 Buffer-based GPS and CDMA pilot searcher 有权
标题翻译：基于缓冲区的GPS和CDMA导频搜索器
公开(公告)号：US07649860B2
公开(公告)日：2010-01-19
申请号：US10061874
申请日：2002-01-31
申请人： Inyup Kang , Christopher Patrick , Bruce R. Meagher , Shimman Patel , Tao Li , Joseph Cheung , Pillappakkam Srinivas , Gregory B. Foerster , Srinivas Varadarajan , Jian Wei
发明人： Inyup Kang , Christopher Patrick , Bruce R. Meagher , Shimman Patel , Tao Li , Joseph Cheung , Pillappakkam Srinivas , Gregory B. Foerster , Srinivas Varadarajan , Jian Wei
IPC分类号： H04B7/212
CPC分类号： H04B1/707 , H04B1/7075 , H04B2201/70709
摘要： A pilot searcher for CDMA and GPS signals. In one aspect, the searcher is operated in conjunction with a sample buffer in a “real-time” or “off-line” mode. The writing/reading of samples to/from the buffer may be performed in a TDM manner via a common port, and samples may be decimated and packed prior to storing in the buffer. In another aspect, the overall search for pilots is partitioned into a number of tasks, with each task corresponding to a search over a given sample segment and based on a particular set of parameter values. The tasks may be stored in a queue and performed one at a time based on their order in the queue. Prior to performing a new task, the parameter values for that task is downloaded to a set of configuration registers. The parameters may be ordered and linked such that only new values are downloaded.
摘要翻译：用于CDMA和GPS信号的导频搜索器。在一个方面，搜索器与“实时”或“离线”模式中的采样缓冲器结合操作。可以通过公共端口以TDM方式执行对/从缓冲器的读取/从缓冲器的读取/读取，并且可以在存储在缓冲器中之前对样本进行抽取和打包。在另一方面，对导频的总体搜索被划分成多个任务，其中每个任务对应于在给定采样段上的搜索，并且基于特定的一组参数值。任务可以存储在队列中，并根据队列中的顺序一次执行一次。在执行新任务之前，将该任务的参数值下载到一组配置寄存器。可以对参数进行排序和链接，以便仅下载新值。

4. 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。

5. 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。

6. 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。

7. 发明申请

US20070066268A1 Systems, methods, and apparatus for frequency control 有权
标题翻译：用于频率控制的系统，方法和装置
公开(公告)号：US20070066268A1
公开(公告)日：2007-03-22
申请号：US11430613
申请日：2006-05-08
申请人： Emilija Simic , Christopher Patrick , Raghu Challa , Douglas Rowitch
发明人： Emilija Simic , Christopher Patrick , Raghu Challa , Douglas Rowitch
IPC分类号： H04B1/26
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，所接收的实例是来自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。

8. 发明授权

US07016688B2 Forward link repeater delay watermarking system 有权
标题翻译：前向链路中继器延迟水印系统
公开(公告)号：US07016688B2
公开(公告)日：2006-03-21
申请号：US10435237
申请日：2003-05-09
申请人： Emilija Simic , Christopher Patrick , Douglas Rowitch , Luca Blessent , Roland Rick
发明人： Emilija Simic , Christopher Patrick , Douglas Rowitch , Luca Blessent , Roland Rick
IPC分类号： H04Q7/20
CPC分类号： H04W64/00 , G01S5/0226 , G01S5/0273 , G01S5/10 , G01S19/09 , G01S19/11 , G01S19/46 , H04B7/155 , H04B7/2606
摘要： A forward link repeater delay watermarking (FLRDWM) system and method that enable accurate position location of mobile stations in areas where repeaters are present by watermarking repeated signals with repeater information. A repeater watermarks a forward link signal with a (unique or non-unique) time delay modulation waveform watermark every time a signal passes through the repeater. A mobile station detects and/or identifies the time delay watermark on the forward link signal to determine repeater information that aids the network position determination entity or mobile station position location system in determining position location using AFLT and/or A-GPS systems. A forward link time delay watermarking system can be implemented to achieve low impact on FL and AFLT performance, favorable detection and identification probabilities, and short time-to-detect/identify.
摘要翻译：一种前向链路中继器延迟水印（FLRDWM）系统和方法，其通过对具有中继器信息的重复信号进行水印来实现移动站在存在中继器的区域中的准确位置定位。中继器每当信号通过中继器时对具有（唯一或非唯一）时间延迟调制波形水印的前向链路信号进行水印。移动台在前向链路信号上检测和/或识别时间延迟水印，以确定使用AFLT和/或A-GPS系统帮助网络位置确定实体或移动台位置系统确定位置定位的中继器信息。可以实现前向链路时间延迟水印系统，以实现对FL和AFLT性能的低影响，良好的检测和识别概率，以及短时间的检测/识别。

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

US20050101272A1 Procedure for searching for position determination signals using a plurality of search modes 有权
标题翻译：使用多个搜索模式搜索位置确定信号的步骤
公开(公告)号：US20050101272A1
公开(公告)日：2005-05-12
申请号：US11004313
申请日：2004-12-02
申请人： Douglas Rowitch , Christopher Patrick
发明人： Douglas Rowitch , Christopher Patrick
IPC分类号： G01S1/00 , G01S19/09 , G01S19/24 , G01S19/25 , G01S19/28 , G01S19/29 , G01S19/45 , G01S19/46 , H04W64/00 , H04B1/18
CPC分类号： H04B1/7077 , G01S5/0268 , G01S19/24 , G01S19/25 , G01S19/28 , G01S19/29 , H04B1/70754
摘要： A method of and system for searching for position determination signals using a plurality of progressively more sensitive search modes comprising a first level mode, a second mode, and at least one higher level mode. If any of the search window parameters exceed prescribed limits, a first level search is performed, and the search window parameters are refined responsive to the ensuing search results so they are within the prescribed limits. Then, the second level search is performed, and measurements derived from the ensuing search results. If the measurements satisfy selected measurement sufficiency criteria, additional searching within the position fix attempt is avoided. If the measurements do not satisfy the selected measurement sufficiency criteria, a higher level, more sensitive search is performed.
摘要翻译：一种用于使用包括第一电平模式，第二模式和至少一个较高电平模式的多个逐渐更敏感的搜索模式来搜索位置确定信号的方法和系统。如果任何搜索窗口参数超过规定的限制，则执行第一级搜索，并且响应于随后的搜索结果来改进搜索窗口参数，使得它们在规定的限制内。然后，执行第二级搜索，并从随后的搜索结果导出测量值。如果测量满足选定的测量足够标准，则避免在定位尝试内的额外搜索。如果测量不满足所选择的测量足够标准，则执行更高级别，更灵敏的搜索。

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