公开(公告)号：US20240280707A1

公开(公告)日：2024-08-22

申请号：US18434754

申请日：2024-02-06

Applicant: GUILIN UNIVERSITY OF TECHNOLOGY

Inventor： Guoqing ZHOU ,  Jianwu LIU ,  Jiasheng XU ,  Ertao GAO ,  Xinkun YUAN

IPC: G01S19/37 ,  G01S19/25 ,  G01S19/53

CPC classification number: G01S19/37 ,  G01S19/256 ,  G01S19/53

Abstract: The present invention discloses a POS high-accuracy positioning method under occlusion, comprising: integrating single-point positioning data and differential correction data for solution to acquire high-accuracy position information; implementing a buffer through an RAM of an FPGA to cache the collected position information and a sampling time; when a satellite signal loss is detected by a system, fetching five pieces of position information from the RAM at a time before the signal is lost and five pieces of position information at a time after the signal is reappeared, and filtering the information to obtain filtered data; constructing an equation by using the filtered data, and estimating a signal lost position. By triggering an occlusion algorithm through the FPGA, the present invention improves an ability of a POS system to work in areas with weak satellite signals and meanwhile reduces an operation time, thereby meeting practical needs.