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公开(公告)号：US11221419B1
公开(公告)日：2022-01-11
申请号：US16369567
申请日：2019-03-29
Applicant: Rockwell Collins, Inc.
Inventor： Huan T. Phan , Gary A. McGraw , Michael J. Armatys
Abstract: A system and related method for determining precision navigation solutions is disclosed. The system decorrelates GPS carrier-phase ambiguities derived from multiple-source GPS information via Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) algorithms. The set of decorrelated floating-point ambiguities is used to compute protection levels and the probability of almost fix (PAF), or the probability that the partial almost-fix solution corresponding to the decorrelated ambiguities is within the region of correctly-fixed or low-error almost-fixed ambiguities. While the PAF remains below threshold and the protection levels remain below alert levels, the optimal navigation solution (floating-point, partial almost-fix, or fully fixed) is generated by fixing the decorrelated ambiguities are one at a time in the LAMBDA domain and replacing the appropriate carrier-phase ambiguities with the corresponding fixed ambiguities, reverting to the last solution if PAF reaches the threshold or if protection levels reach the alert levels.
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Patent Agency Ranking
2.发明授权Picosecond clock synchronization technique for communication and navigation platform equipment 有权用于通信和导航平台设备的Picosecond时钟同步技术公开(公告)号：US09596073B1
公开(公告)日：2017-03-14
申请号：US14993973
申请日：2016-01-12
Applicant: Rockwell Collins, Inc.
Inventor： Gina M. Reyes , Jason H. Timmerman , James H. Doty , Patrick Y. Hwang , Guolin Peng , Gary A. McGraw
CPC classification number: H04L7/0037 , G01R25/00 , H04J3/0638 , H04J3/0676 , H04J3/0688 , H04J3/14 , H04L7/0045
Abstract: Systems and related methods for simultaneous high precision synchronization and syntonization of multiple sensors or clocks utilize a precision estimator that receives clock signals and time mark signals from both sensors (a reference sensor and a clock to be measured against the reference sensor). A precision time and frequency estimator determines a time offset, frequency offset, and phase offset of the measured sensor relative to the reference sensor. Associated systems can additionally determine the propagation delay between two remote subsystems connected by a communications channel. The communications channel may be a bidirectional duplexed or multiplexed channel allowing for mutual exchange of timing information along a single non-dedicated cable between sensors. Sensors may be synchronized to within 10 ps of each other without the need for THz clocks or fiber-optic cabling.
Abstract translation: 用于同时进行多个传感器或时钟同步高精度同步和同步化的系统和相关方法利用精密估计器，其从两个传感器接收时钟信号和时间标记信号（参考传感器和相对于参考传感器测量的时钟）。 精确时间和频率估计器确定测量的传感器相对于参考传感器的时间偏移，频率偏移和相位偏移。 相关系统还可以确定通过通信信道连接的两个远程子系统之间的传播延迟。 通信信道可以是双向双工或多路复用信道，允许沿着传感器之间的单个非专用电缆相互交换定时信息。 传感器可以彼此同步到10ps以内，而不需要THz时钟或光纤布线。
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公开(公告)号：US10274606B1
公开(公告)日：2019-04-30
申请号：US15065260
申请日：2016-03-09
Applicant: Rockwell Collins, Inc.
Inventor： Huan T. Phan , Gary A. McGraw , Michael J. Armatys
Abstract: A system and related methods for determining precision navigation solutions decorrelates GPS carrier-phase ambiguities derived from multiple-source GPS information via Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) algorithms, and fixes a subset of the decorrelated integer ambiguities within the LAMBDA domain. To maintain high accuracy, a partial almost fix solution is generated using the subset of the decorrelated ambiguities to be fixed in the LAMBDA domain. The subset of decorrelated ambiguities is used to compute protection levels and the probability of almost fix (PAF), or that the navigation solution corresponding to the decorrelated ambiguities is within the region of correctly-fixed or low-error almost-fixed ambiguities. The partial list of fixed ambiguities is used to generate the optimal navigation solution (floating-point, partial almost-fix, or fully fixed) while maintaining protection levels within alert limits and PAF above the desired threshold.
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公开(公告)号：US09883348B1
公开(公告)日：2018-01-30
申请号：US15415671
申请日：2017-01-25
Applicant: Rockwell Collins, Inc.
Inventor： Brad A. Walker , Steven E. Koenck , Gary A. McGraw
CPC classification number: H04W4/029 , G01C21/165 , G01C21/206 , G01S5/0284 , G06F3/012 , G06F3/0346 , H04W4/026 , H04W4/027
Abstract: A system and related method for navigation and orientation determination in an indoor or GPS-denied environment mounts a static reference transceiver (SRT) at a known, fixed position within the environment, the fixed position referenced by a coordinate reference frame (CRF) of the SRT. The SRT communicates its position to mobile dismounted units within the environment, determining a range and orientation angle of each mobile unit relative to the SRT CRF based on response signals received from the mobile units. The SRT provides the determined SRT-CRF-referenced ranges and orientation angles to the mobile units, which may share orientation data with each other or relay the SRT-referenced location data to other mobile units not within line of sight of the SRT.
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公开(公告)号：US11644578B2
公开(公告)日：2023-05-09
申请号：US17564906
申请日：2021-12-29
Applicant: Rockwell Collins, Inc.
Inventor： Huan T. Phan , Gary A. McGraw , Michael J. Armatys
CPC classification number: G01S19/44 , G01S19/15 , G01S19/41 , G01S19/55 , G01S19/07 , G01S19/20 , G01S19/40
Abstract: A system and for determining precision navigation solutions decorrelates GPS carrier-phase ambiguities derived from multiple-source GPS information via Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) algorithms. The set of decorrelated floating-point ambiguities is used to compute protection levels and the probability of almost fix (PAF), or the probability that the partial almost-fix solution corresponding to the decorrelated ambiguities is within the region of correctly-fixed or low-error almost-fixed ambiguities. While the PAF remains below threshold and the protection levels remain below alert levels, the optimal navigation solution (floating-point, partial almost-fix, or fully fixed) is generated by fixing the decorrelated ambiguities are one at a time in the LAMBDA domain and replacing the appropriate carrier-phase ambiguities with the corresponding fixed ambiguities, reverting to the last solution if PAF reaches the threshold or if protection levels reach the alert levels.
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公开(公告)号：US20220120916A1
公开(公告)日：2022-04-21
申请号：US17564906
申请日：2021-12-29
Applicant: Rockwell Collins, Inc.
Inventor： Huan T. Phan , Gary A. McGraw , Michael J. Armatys
Abstract: A system and for determining precision navigation solutions decorrelates GPS carrier-phase ambiguities derived from multiple-source GPS information via Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) algorithms. The set of decorrelated floating-point ambiguities is used to compute protection levels and the probability of almost fix (PAF), or the probability that the partial almost-fix solution corresponding to the decorrelated ambiguities is within the region of correctly-fixed or low-error almost-fixed ambiguities. While the PAF remains below threshold and the protection levels remain below alert levels, the optimal navigation solution (floating-point, partial almost-fix, or fully fixed) is generated by fixing the decorrelated ambiguities are one at a time in the LAMBDA domain and replacing the appropriate carrier-phase ambiguities with the corresponding fixed ambiguities, reverting to the last solution if PAF reaches the threshold or if protection levels reach the alert levels.
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