公开(公告)号：US20240012158A1

公开(公告)日：2024-01-11

申请号：US18035074

申请日：2021-10-14

Applicant: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

Inventor： Chang Don Kee ,  Jungbeom Kim ,  O Jong Kim ,  Yonghwan Bae

IPC: G01S19/40 ,  G01S19/23 ,  G01S19/07 ,  G01S19/29

CPC classification number: G01S19/40 ,  G01S19/23 ,  G01S19/07 ,  G01S19/29

Abstract: A method for estimating a multipath error of a pseudo-range measurement value, according to an embodiment of the present invention, comprises the steps of: obtaining satellite navigation system information including a pseudo-range measurement value and a carrier wave phase measurement value; obtaining a carrier wave phase time difference measurement value by differentiating the carrier wave phase measurement value with respect to an arbitrary time; setting a monitoring variable for multipath error estimation by using the carrier wave phase time difference measurement value; detecting a change amount of a multipath error regarding the arbitrary time by using the monitoring variable, and determining a time period that can be used to estimate the multipath error; and estimating the multipath error at a specific time point by using the change amount of the multipath error relative to an arbitrary reference time. According to an embodiment, the location of a target can be precisely determined even in a downtown environment in which signal distortion is severe, by estimating the multipath error included in the pseudo-range measurement value, and compensating for or excluding the multipath error.