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1.发明授权Method for refining state estimates of a global positioning system (GPS) receiver based upon sequential GPS carrier phase measurements 有权基于连续的GPS载波相位测量来改进全球定位系统（GPS）接收机状态估计的方法公开(公告)号：US07423583B2
公开(公告)日：2008-09-09
申请号：US11335245
申请日：2006-01-19
Applicant: James R. Wright , William A. Chuba , Richard S. Hujsak
Inventor： James R. Wright , William A. Chuba , Richard S. Hujsak
Abstract: Sequential GPS Doppler carrier phase count measurements are used for precision sequential determination of position and velocity of a GPS receiver, such as for orbit determination and geolocation, with minimum throughput time. Real-time orbit determination and geolocation performance is enabled with an optimal sequential filter, and near-real-time performance is enabled with an optimal fixed-lag smoother. Many problems associated with prior art orbit determination are eliminated by addressing the “cycle slip” problem, the unknown initial range problem with RANGECP measurement representations, the problem of serial correlation in the measurements due to reprocessing of overlapping thermal noise. Also, the present invention significantly attenuates the carrier signal phase variation due to rotation of receiver antenna relative to transmitter antenna because the sequential phase count time intervals are sufficiently short.
Abstract translation: 顺序GPS多普勒载波相位计数测量用于精确连续确定GPS接收机的位置和速度，例如用于轨道确定和地理定位，最小吞吐时间。 实时轨道确定和地理定位性能可通过最优顺序滤波器实现，并且可实现近实时性能，并具有最优的固定滞后平滑器。 与现有技术的轨道确定相关的许多问题通过解决“循环滑移”问题，RANGE
测量表示的未知初始范围问题，由于重叠处理引起的测量中的串行相关问题而被消除 热噪声。 此外，由于连续相位计数时间间隔足够短，本发明显着地衰减了由于接收机天线相对于发射机天线的转动而导致的载波信号相位变化。 -
公开(公告)号：US07050002B1
公开(公告)日：2006-05-23
申请号：US11140296
申请日：2005-05-27
Applicant: James R. Wright , William A. Chuba , Richard S. Hujsak
Inventor： James R. Wright , William A. Chuba , Richard S. Hujsak
Abstract: Sequential GPS Doppler carrier phase count measurements are used for precision sequential determination of position and velocity of a GPS receiver, such as for orbit determination and geolocation, with minimum throughput time. Real-time orbit determination and geolocation performance is enabled with an optimal sequential filter, and near-real-time performance is enabled with an optimal fixed-lag smoother. Many problems associated with prior art orbit determination are eliminated by addressing the “cycle slip” problem, the unknown initial range problem with RANGECP measurement representations, the problem of serial correlation in the measurements due to reprocessing of overlapping thermal noise. Also, the present invention significantly attenuates the carrier signal phase variation due to rotation of receiver antenna relative to transmitter antenna because the sequential phase count time intervals are sufficiently short.
Abstract translation: 顺序GPS多普勒载波相位计数测量用于精确连续确定GPS接收机的位置和速度，例如用于轨道确定和地理定位，最小吞吐时间。 实时轨道确定和地理定位性能可通过最优顺序滤波器实现，并且可实现近实时性能，并具有最优的固定滞后平滑器。 与现有技术的轨道确定相关的许多问题通过解决“循环滑移”问题，RANGE
测量表示的未知初始范围问题，由于重叠处理引起的测量中的串行相关问题而被消除 热噪声。 此外，由于连续相位计数时间间隔足够短，本发明显着地衰减了由于接收机天线相对于发射机天线的转动而导致的载波信号相位变化。
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