-
公开(公告)号：US20090128407A1
公开(公告)日：2009-05-21
申请号：US11942912
申请日：2007-11-20
申请人： Gang Xie , Mangesh Chansarkar , Daniel Liao , Xiangdong Lin
发明人： Gang Xie , Mangesh Chansarkar , Daniel Liao , Xiangdong Lin
摘要： Systems and methods for detecting global positioning system (GPS) measurement errors are provided. In this regard, a representative system, among others, includes a navigation device that is configured to receive GPS signals from signal sources, the navigation device being configured to calculate pseudoranges (PRs) and delta ranges (DRs) based on the received GPS signals, the navigation device including a consistency check algorithm that is configured to: determine mismatches between the respective calculated PRs and DRs, and indicate that an error exists in the respective calculated PRs and DRs based on their mismatch and mismatch accumulations. This algorithm can be independent of navigation state and is capable of detecting slow-changing errors.
摘要翻译： 提供了用于检测全球定位系统（GPS）测量误差的系统和方法。 在这方面，代表性系统包括配置成从信号源接收GPS信号的导航装置，所述导航装置被配置为基于所接收的GPS信号计算伪距（PR）和增量范围（DR） 所述导航装置包括一致性检查算法，其被配置为：确定各个计算的PR和DR之间的不匹配，并且基于它们的不匹配和不匹配累积来指示各个计算的PR和DR中存在错误。 该算法可以独立于导航状态，并且能够检测慢速变化的错误。
-
公开(公告)号：US07821454B2
公开(公告)日：2010-10-26
申请号：US11942912
申请日：2007-11-20
申请人： Gang Xie , Mangesh Chansarkar , Daniel Liao , Xiangdong Lin
发明人： Gang Xie , Mangesh Chansarkar , Daniel Liao , Xiangdong Lin
摘要： Systems and methods for detecting global positioning system (GPS) measurement errors are provided. In this regard, a representative system, among others, includes a navigation device that is configured to receive GPS signals from signal sources, the navigation device being configured to calculate pseudoranges (PRs) and delta ranges (DRs) based on the received GPS signals, the navigation device including a consistency check algorithm that is configured to: determine mismatches between the respective calculated PRs and DRs, and indicate that an error exists in the respective calculated PRs and DRs based on their mismatch and mismatch accumulations. This algorithm can be independent of navigation state and is capable of detecting slow-changing errors.
摘要翻译： 提供了用于检测全球定位系统（GPS）测量误差的系统和方法。 在这方面，代表性系统包括配置成从信号源接收GPS信号的导航装置，所述导航装置被配置为基于所接收的GPS信号计算伪距（PR）和增量范围（DR） 所述导航装置包括一致性检查算法，所述一致性检查算法被配置为：确定各个计算的PR和DR之间的不匹配，并且基于它们的不匹配和不匹配累积来指示相应的所计算的PR和DR中存在错误。 该算法可以独立于导航状态，并且能够检测慢速变化的错误。
-
公开(公告)号：US08670882B2
公开(公告)日：2014-03-11
申请号：US12061726
申请日：2008-04-03
申请人： Gang Xie , Mangesh Chansarkar , Sanjai Kohli
发明人： Gang Xie , Mangesh Chansarkar , Sanjai Kohli
CPC分类号： G05D1/0676 , G01C21/005 , G01C21/165 , G01C21/26 , G01S19/07 , G01S19/20 , G01S19/42 , G01S19/47
摘要： Systems and methods for monitoring navigation state errors are provided. In this regard, a representative system, among others, includes a receiver that is configured to receive GPS signals and calculate pseudorange (PR) residuals, the receiver including a navigation state error manager that is configured to: calculate a distance traveled by the receiver having the PR residuals, determine whether a navigation state has errors based on the calculated PR residuals and calculated distance, and responsive to determining that the navigation state has errors, send an error message indicating that the navigation state has errors.
摘要翻译： 提供了监控导航状态错误的系统和方法。 在这方面，代表性系统包括被配置为接收GPS信号并计算伪距（PR）残差的接收机，该接收机包括导航状态错误管理器，其被配置为：计算接收机行进的距离， PR残差，根据所计算出的PR残差和计算出的距离确定导航状态是否具有错误，并且响应于确定导航状态具有错误，发送指示导航状态具有错误的错误消息。
-
公开(公告)号：US07881407B2
公开(公告)日：2011-02-01
申请号：US12199066
申请日：2008-08-27
申请人： Mangesh Chansarkar , Gang Xie , Sanjai Kohli
发明人： Mangesh Chansarkar , Gang Xie , Sanjai Kohli
CPC分类号： H04B7/216 , G01S19/22 , G01S19/40 , G01S19/42 , G01S19/49 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B2001/70706 , H04B2201/70715
摘要： Systems and methods for mitigating multipath signals in a receiver are provided. In this regard, a representative system, among others, includes a receiver comprising an antenna being configured to receive signals from a plurality of satellites, and a computing device being configured to: generate pseudorange measurements based on the received satellites signals, process the generated pseudorange measurements to reduce its pseudorange residuals based on statistical modeling in order to mitigate multipath errors, and compute navigation solutions based on the processed pseudorange measurements. A representative method, among others, for mitigating multipath signals in a receiver, comprises: receiving the pseudorange measurements; processing the received pseudorange measurements to reduce its pseudorange residuals based on statistical modeling in order to mitigate multipath errors; and computing navigation solutions based on the processed pseudorange measurements.
摘要翻译： 提供了用于减轻接收机中的多径信号的系统和方法。 在这方面，代表性系统包括：接收机，其包括被配置为从多个卫星接收信号的天线，以及计算设备，被配置为：基于所接收的卫星信号产生伪距测量，处理所产生的伪距 基于统计建模来减少其伪距残差的测量，以减轻多路径误差，并根据处理的伪距测量计算导航解。 用于减轻接收机中的多路径信号的代表性方法包括：接收伪距测量; 处理所接收到的伪距测量以便基于统计建模来减少其伪距残差以便减轻多路径误差; 以及基于经处理的伪距测量的计算导航解决方案。
-
公开(公告)号：US20100232351A1
公开(公告)日：2010-09-16
申请号：US12402426
申请日：2009-03-11
申请人： Mangesh CHANSARKAR , Gang Xie , Gengsheng Zhang
发明人： Mangesh CHANSARKAR , Gang Xie , Gengsheng Zhang
摘要： The present invention provides methods of improving GNSS receivers' satellite signal acquisition and TIFF performances by taking advantage of SBAS signals. Due to a SBAS satellite's geostationary position and typically strong signal, the SBAS satellite signal can be acquired more quickly than a GPS satellite signal. Once a SBAS satellite signal is acquired the Doppler frequency search uncertainty may be reduced for remaining GNSS satellites which are to be acquired. Furthermore, a satellite search list may be optimized to search for satellites close to the line of sight (LOS) of the SBAS satellite for which a signal has been acquired, in receiver “warm” and “hot” start modes. Moreover, since a SBAS signal sub-frame is only one second long, which is shorter than six seconds for a GPS signal sub-frame, synchronization of the SBAS signal sub-frame may be achieved faster than for GPS signals. With aided time information, a receiver may compute the absolute time of week (TOW) from a sub-frame synchronized SBAS signal. Therefore, without necessarily waiting for TOW to be decoded from a GPS signal and with TOW extracted from a SBAS signal, a receiver can achieve better TTFF performance.
摘要翻译： 本发明提供了通过利用SBAS信号来改进GNSS接收机的卫星信号采集和TIFF性能的方法。 由于SBAS卫星的对地静止位置和典型的强信号，可以比GPS卫星信号更快地获取SBAS卫星信号。 一旦获取了SBAS卫星信号，可能会减少将要获取的剩余GNSS卫星的多普勒频率搜索不确定度。 此外，可以优化卫星搜索列表，以在接收机“暖”和“热”启动模式中搜索靠近已经获取信号的SBAS卫星的视线（LOS）的卫星。 此外，由于对于GPS信号子帧，SBAS信号子帧仅为1秒长度，其短于6秒，所以可以比针对GPS信号更快地实现SBAS信号子帧的同步。 利用辅助时间信息，接收机可以从子帧同步的SBAS信号计算绝对时间（TOW）。 因此，不必等待TOW从GPS信号解码，并且从SBAS信号提取TOW，接收机可以实现更好的TTFF性能。
-
6.发明申请Systems and Methods for Synthesizing GPS Measurements to Improve GPS Location Availability 有权综合GPS测量的系统和方法，以改善GPS位置的可用性公开(公告)号：US20100328146A1
公开(公告)日：2010-12-30
申请号：US11934832
申请日：2007-11-05
IPC分类号： G01S19/42
摘要： There are situations where GPS signals are received from less than four satellites. In order to improve the GPS location availability, disclosed here are systems and methods for synthesizing GPS measurements, which, together with fewer than four available real GPS signals, can be used to calculate a position fix. In particular, GPS range measurements for lost satellites, which are satellites that were previously tracked but are now not tracked, are synthesized to improve GPS signal availability. The synthesized measurements are used along with real measurements to enable accurate position fix even when GPS satellite availability is poor. Different synthesized measurement generation schemes, depending on whether an INS/DR aiding system is available, are further described herein.
摘要翻译： 存在从不到四颗卫星接收GPS信号的情况。 为了改善GPS位置可用性，这里公开了用于合成GPS测量的系统和方法，其与少于四个可用的真实GPS信号一起可用于计算定位。 特别地，合成用于丢失的卫星（其是先前被跟踪但现在未被跟踪的卫星）的GPS距离测量以改善GPS信号的可用性。 合成的测量结果与实际测量一起使用，即使在GPS卫星可用性差的情况下也能够进行精确的定位。 本文进一步描述了不同的合成测量生成方案，这取决于INS / DR辅助系统是否可用。
-
公开(公告)号：US20090254275A1
公开(公告)日：2009-10-08
申请号：US12061726
申请日：2008-04-03
申请人： Gang Xie , Mangesh Chansarkar , Sanjai Kohli
发明人： Gang Xie , Mangesh Chansarkar , Sanjai Kohli
CPC分类号： G05D1/0676 , G01C21/005 , G01C21/165 , G01C21/26 , G01S19/07 , G01S19/20 , G01S19/42 , G01S19/47
摘要： Systems and methods for monitoring navigation state errors are provided. In this regard, a representative system, among others, includes a receiver that is configured to receive GPS signals and calculate pseudorange (PR) residuals, the receiver including a navigation state error manager that is configured to: calculate a distance traveled by the receiver having the PR residuals, determine whether a navigation state has errors based on the calculated PR residuals and calculated distance, and responsive to determining that the navigation state has errors, send an error message indicating that the navigation state has errors.
摘要翻译： 提供了监控导航状态错误的系统和方法。 在这方面，代表性系统包括被配置为接收GPS信号并计算伪距（PR）残差的接收机，该接收机包括导航状态错误管理器，其被配置为：计算接收机行进的距离， PR残差，根据所计算出的PR残差和计算出的距离确定导航状态是否具有错误，并且响应于确定导航状态具有错误，发送指示导航状态具有错误的错误消息。
-
8.发明授权Systems and methods for synthesizing GPS measurements to improve GPS location availability 有权GPS测量的系统和方法，以提高GPS位置的可用性公开(公告)号：US08378887B2
公开(公告)日：2013-02-19
申请号：US13439075
申请日：2012-04-04
摘要： There are situations where GPS signals are received from less than four satellites. In order to improve the GPS location availability, disclosed here are systems and methods for synthesizing GPS measurements, which, together with fewer than four available real GPS signals, can be used to calculate a position fix. In particular, GPS range measurements for lost satellites, which are satellites that were previously tracked but are now not tracked, are synthesized to improve GPS signal availability. The synthesized measurements are used along with real measurements to enable accurate position fix even when GPS satellite availability is poor. Different synthesized measurement generation schemes, depending on whether an INS/DR aiding system is available, are further described herein.
摘要翻译： 存在从不到四颗卫星接收GPS信号的情况。 为了改善GPS位置可用性，这里公开了用于合成GPS测量的系统和方法，其与少于四个可用的真实GPS信号一起可用于计算定位。 特别地，合成用于丢失的卫星（其是先前被跟踪但现在未被跟踪的卫星）的GPS距离测量以改善GPS信号的可用性。 合成的测量结果与实际测量一起使用，即使在GPS卫星可用性差的情况下也能够进行精确的定位。 本文进一步描述了不同的合成测量生成方案，这取决于INS / DR辅助系统是否可用。
-
9.发明授权Systems and methods for synthesizing GPS measurements to improve GPS location availability 有权GPS测量的系统和方法，以提高GPS位置的可用性公开(公告)号：US08159393B2
公开(公告)日：2012-04-17
申请号：US11934832
申请日：2007-11-05
IPC分类号： G01S19/38
摘要： There are situations where GPS signals are received from less than four satellites. In order to improve the GPS location availability, disclosed here are systems and methods for synthesizing GPS measurements, which, together with fewer than four available real GPS signals, can be used to calculate a position fix. In particular, GPS range measurements for lost satellites, which are satellites that were previously tracked but are now not tracked, are synthesized to improve GPS signal availability. The synthesized measurements are used along with real measurements to enable accurate position fix even when GPS satellite availability is poor. Different synthesized measurement generation schemes, depending on whether an INS/DR aiding system is available, are further described herein.
摘要翻译： 存在从不到四颗卫星接收GPS信号的情况。 为了改善GPS位置可用性，这里公开了用于合成GPS测量的系统和方法，其与少于四个可用的真实GPS信号一起可用于计算定位。 特别地，合成用于丢失的卫星（其是先前被跟踪但现在未被跟踪的卫星）的GPS距离测量以改善GPS信号的可用性。 合成的测量结果与实际测量一起使用，即使在GPS卫星可用性差的情况下也能够进行精确的定位。 本文进一步描述了不同的合成测量生成方案，这取决于INS / DR辅助系统是否可用。
-
公开(公告)号：US20080309553A1
公开(公告)日：2008-12-18
申请号：US12199066
申请日：2008-08-27
申请人： Mangesh Chansarkar , Gang Xie , Sanjai Kohli
发明人： Mangesh Chansarkar , Gang Xie , Sanjai Kohli
IPC分类号： G01S1/00
CPC分类号： H04B7/216 , G01S19/22 , G01S19/40 , G01S19/42 , G01S19/49 , H04B1/707 , H04B1/7085 , H04B1/7115 , H04B2001/70706 , H04B2201/70715
摘要： Systems and methods for mitigating multipath signals in a receiver are provided. In this regard, a representative system, among others, includes a receiver comprising an antenna being configured to receive signals from a plurality of satellites, and a computing device being configured to: generate pseudorange measurements based on the received satellites signals, process the generated pseudorange measurements to reduce its pseudorange residuals based on statistical modeling in order to mitigate multipath errors, and compute navigation solutions based on the processed pseudorange measurements. A representative method, among others, for mitigating multipath signals in a receiver, comprises: receiving the pseudorange measurements; processing the received pseudorange measurements to reduce its pseudorange residuals based on statistical modeling in order to mitigate multipath errors; and computing navigation solutions based on the processed pseudorange measurements.
摘要翻译： 提供了用于减轻接收机中的多径信号的系统和方法。 在这方面，代表性系统包括一个接收机，其包括被配置为从多个卫星接收信号的天线，以及计算设备，被配置为：基于所接收的卫星信号产生伪距测量，处理所产生的伪距 基于统计建模来减少其伪距残差的测量，以减轻多路径误差，并根据处理的伪距测量计算导航解。 用于减轻接收机中的多路径信号的代表性方法包括：接收伪距测量; 处理所接收到的伪距测量以便基于统计建模来减少其伪距残差以便减轻多路径误差; 以及基于经处理的伪距测量的计算导航解决方案。
-
-
-
-
-
-
-
-
-
搜索结果
60 条记录 (耗时 0.022 秒)
