公开(公告)号：WO2006110454A1

公开(公告)日：2006-10-19

申请号：PCT/US2006/012842

申请日：2006-04-07

Applicant: QUALCOMM INCORPORATED ,  VASANADU, Ajay ,  PATRICK, Christopher ,  KHUSHU, Sanjeev

Inventor： VASANADU, Ajay ,  PATRICK, Christopher ,  KHUSHU, Sanjeev

IPC: H04Q7/38 ,  H04L12/56 ,  G06F17/30

CPC classification number: H04W28/10 ,  G01S19/05 ,  G01S19/09 ,  H04W74/00

Abstract: A method, system and computer readable medium for throttling requests to access a shared resource throttles requests that are made too frequently due to, for instance, repeatedly failed access, i.e. a mobile station trying to access location data failed to get the data due to the network conditions and will try again and again until it gets the data, thereby the access frequency of said mobile station during a certain period may be very high. The methodology reduces the frequency of requests by setting a throttle end time that is based upon the frequency of previously desired access. Access is denied for a time period up until the throttle end time. The shared resource may be a CPU, a channel, a data base, etc.

Abstract translation: 用于限制访问共享资源的请求的方法，系统和计算机可读介质阻止由于例如重复失败的访问而被太频繁地进行的请求，即，尝试访问位置数据的移动站无法得到由于 网络条件，并将一次又一次地尝试，直到它获得数据，从而在一定时间段内所述移动台的接入频率可能非常高。 该方法通过基于先前期望的访问频率设置节气门结束时间来减少请求的频率。 访问被拒绝一段时间，直到节气门结束时间。 共享资源可以是CPU，信道，数据库等。

公开(公告)号：WO2006060605A3

公开(公告)日：2006-06-08

申请号：PCT/US2005/043529

申请日：2005-12-01

Applicant: QUALCOMM Incorporated ,  SIMIC, Emilija M. ,  PATRICK, Christopher ,  ROWITCH, Douglas N.

Inventor： SIMIC, Emilija M. ,  PATRICK, Christopher ,  ROWITCH, Douglas N.

IPC: G01S1/00 ,  H04B1/707

Abstract: 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.

公开(公告)号：WO2005055494A2

公开(公告)日：2005-06-16

申请号：PCT/US2004/039692

申请日：2004-11-24

Applicant: QUALCOMM Incorporated ,  PATRICK, Christopher

Inventor： PATRICK, Christopher

IPC: H04L

CPC classification number: H04W64/00 ,  G01S5/0263 ,  G01S19/09 ,  G01S19/46 ,  H04W4/20 ,  H04W64/006

Abstract: A method for calculating a position estimate of a mobile station (MS) includes collecting in the MS position estimate information (PEI) transmitted by a location node. At some point, the MS generates PEI parameters which include information from which the location node can be located or identified. The MS generates the PEI parameters based upon the PEI transmitted by the location node. Once generated, the MS sends the PEI parameters to a position determination entity. The PEI parameters permit calculation of the position estimate of the mobile station.

Abstract translation: 用于计算移动台（MS）的位置估计的方法包括收集由位置节点发送的MS位置估计信息（PEI）。 在某个时刻，MS生成PEI参数，其中包括定位节点可以从中找到或识别的信息。 MS根据位置节点发送的PEI生成PEI参数。 一旦产生，MS将PEI参数发送给位置确定实体。 PEI参数允许计算移动台的位置估计。

公开(公告)号：WO2004065982A1

公开(公告)日：2004-08-05

申请号：PCT/US2003/010064

申请日：2003-04-01

Applicant: QUALCOMM INCORPORATED

Inventor： PATRICK, Christopher ,  ROWITCH, Douglas N. ,  SRINIVAS, Pillappakkam

IPC: G01S5/14

CPC classification number: H04B1/707 ,  G01S19/29 ,  H04L2027/0065

Abstract: 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 of peak profile p (t) and correcting this position based on the compensation.

Abstract translation: 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峰值轮廓p（t）的复合峰值位置并基于该补偿来校正该位置。

公开(公告)号：WO2004038447A1

公开(公告)日：2004-05-06

申请号：PCT/US2003/033662

申请日：2003-10-22

Applicant: QUALCOMM, INCORPORATED

Inventor： SIMIC, Emilija ,  PATRICK, Christopher ,  ROWITCH, Douglas, Neal

IPC: G01S1/02

CPC classification number: G01S19/235

Abstract: 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.

Abstract translation: 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伪距测量的产量降低。 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如此，通过对在AFLT码相位测量时间传播到在位置定位引擎中使用之前的公共时间的不利影响。 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。

公开(公告)号：EP1695570B1

公开(公告)日：2020-05-13

申请号：EP04812252.7

申请日：2004-11-24

Applicant: QUALCOMM INCORPORATED

Inventor： PATRICK, Christopher

IPC: G01S5/02 ,  G01S19/09 ,  G01S19/46 ,  H04W64/00

公开(公告)号：EP1490705B1

公开(公告)日：2012-02-29

申请号：EP03716951.3

申请日：2003-04-01

Applicant: QUALCOMM INCORPORATED

Inventor： PATRICK, Christopher ,  ROWITCH, Douglas N. ,  SRINIVAS, Pillappakkam

IPC: G01S5/14

CPC classification number: H04B1/707 ,  G01S19/29 ,  H04L2027/0065

Abstract: 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 of peak profile p (t) and correcting this position based on the compensation.

公开(公告)号：EP1556711A1

公开(公告)日：2005-07-27

申请号：EP03779204.1

申请日：2003-10-22

Applicant: Qualcomm, Incorporated

Inventor： SIMIC, Emilija ,  PATRICK, Christopher ,  ROWITCH, Douglas, Neal

IPC: G01S1/02

CPC classification number: G01S19/235

Abstract: 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.

Abstract translation: 一个无线通信设备的位置确定精度也可以由一个大下落不明GPS多普勒偏压，这又可能影响由无线通信装置进行的GPS多普勒估计和GPS多普勒测量受到不利的影响。 GPS多普勒测量的质量为位置定位非常重要的，因为质量差的GPS多普勒测量可以防止无线通信设备从具有窄的频率范围内，这将导致降低的GPS伪距测量产量最敏感的模式获取卫星。 大下落不明GPS多普勒偏压从而定位精度产生不利的影响由于对GPS码相位测量时间传播到它们的位置的位置计算使用之前共同时间的不利影响的。 同样是在未考虑CDMA码多普勒的情况下如此，通过对AFLT码相位测量时间传播到它们的位置定位引擎使用之前共同时间的不利影响。 这种效果是在大型搜索窗口的情况下最大的担忧。 因此，本公开内容提供了在随时间变化的频率误差的存在优化基于GPS位置定位，包括连续地测量和/或计算得到的GPS多普勒偏压和CDMA码多普勒偏压和然后最小化及其与不良影响的步骤的方法 关于定位确定通过重新定心基于GPS多普勒偏移值GPS多普勒搜索窗口，以及使用GPS多普勒偏压和CDMA码多普勒偏移值正确地传播GPS伪距和AFLT导频相位测量，分别共同的时间 之前，他们在一个位置定位引擎的使用。

公开(公告)号：EP1301802A2

公开(公告)日：2003-04-16

申请号：EP01954780.1

申请日：2001-07-17

Applicant: QUALCOMM INCORPORATED

Inventor： PATRICK, Christopher

IPC: G01S1/00

CPC classification number: G01S19/256 ,  G01S19/05 ,  G01S19/30

Abstract: A GPS communication system including a server and a client, each including a GPS receiver, for reducing the code phase search space of the GPS receiver of the client. The communication system includes a transmitter for transmitting timing information from the server to the client to help the client locate a first satellite, and a receiver for using timing differences between the satellites to synchronize and locate other satellites. The code phase search space is reduced by reducing the number of phase hypotheses that must be calculated to establish communication between the server and the client.

公开(公告)号：EP1817605B1

公开(公告)日：2012-01-18

申请号：EP05852691.4

申请日：2005-12-01

Applicant: QUALCOMM INCORPORATED

Inventor： SIMIC, Emilija M. ,  PATRICK, Christopher ,  ROWITCH, Douglas N.

IPC: G01S19/21 ,  H04B1/7097

CPC classification number: G01S19/34 ,  G01S19/03 ,  G01S19/21 ,  G01S19/22 ,  G01S19/29 ,  H04B1/7077 ,  H04K3/228

Abstract: 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.