Invention Grant
- Patent Title: Positioning method using height-constraint-based extended Kalman filter
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Application No.: US16309939Application Date: 2016-06-27
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Publication No.: US10422883B2Publication Date: 2019-09-24
- Inventor: Yuan Zhuang , Jinfeng Ma , Longning Qi , Xinning Liu , Jun Yang
- Applicant: Southeast University
- Applicant Address: CN Nanjing
- Assignee: SOUTHEAST UNIVERSITY
- Current Assignee: SOUTHEAST UNIVERSITY
- Current Assignee Address: CN Nanjing
- Agent Gokalp Bayramoglu
- Priority: CN201610432153 20160616
- International Application: PCT/CN2016/087287 WO 20160627
- International Announcement: WO2017/215026 WO 20171221
- Main IPC: G01S19/40
- IPC: G01S19/40 ; G01S19/42 ; G01S19/37

Abstract:
A positioning method using height-constraint-based extended Kalman filter, suitable for a GNSS navigation and positioning system, comprises: obtaining an estimated state value of a current epoch by using an extended Kalman filter algorithm and according to an estimated state value of a previous epoch; constraining a positioning height of the current epoch by establishing a height constraint condition, so as to obtain an optimum estimated value of the current epoch and a corresponding mean square error, wherein the optimum estimated value satisfies the height constraint condition; further correcting the estimated state value by using a pseudorange obtained from the mean square error and a measured Doppler shift residual to obtain a final estimated state value of the current epoch, thus more accurately obtaining positioning information of a target to be positioned in the current epoch and enhancing the accuracy of GNSS navigation and positioning.
Public/Granted literature
- US20190146095A1 EXTENDED KALMAN FILTER POSITIONING METHOD BASED ON HEIGHT CONSTRAINT Public/Granted day:2019-05-16
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