US 2021/0063582 A1 · APPARATUS AND METHOD OF SELECTING AIRBORNE POSITION REFERENCE NODE

Abstract

Provided is a method and apparatus for selecting an airborne position reference node. A weight center coordinate of the repeaters is calculated by using position coordinates of repeaters, a plane having a vector connecting the weight center coordinate and a position coordinate of a user as a normal vector is determined, and the position coordinates of the repeaters are orthographically projected onto the plane. A certain number of repeaters located farthest from the weight center coordinate of the repeaters are selected to be airborne position reference nodes, on the basis of the orthographically projected coordinates of the repeaters and the weight center coordinate.

Claims15

Dependent claims

A method of selecting an airborne position reference node, the method comprising:

obtaining position coordinates of repeaters and position coordinate of a user;
calculating a weight center coordinate of the repeaters by using the position coordinates of the repeaters;
determining a plane having a vector connecting the weight center coordinate of the repeaters and the position coordinate of the user as a normal vector;
orthographically projecting the position coordinates of the repeaters onto the plane;
and
selecting a certain number of repeaters located farthest from the weight center coordinate of the repeaters to be airborne position reference nodes, on the basis of the orthographically projected coordinates of the repeaters and the weight center coordinate of the repeaters.

3 more elements

An apparatus for selecting an airborne position reference node, the apparatus comprising:

a communicator configured to receive position coordinates of repeaters and a position coordinate of a user;
and
a controller configured to calculate a weight center coordinate of the repeaters by using the position coordinates of repeaters,
determine a plane having a vector connecting the weight center coordinate of the repeaters and the position coordinate of a user as a normal vector,
orthographically project the position coordinates of the repeaters onto the plane, and
select a certain number of repeaters located farthest from the weight center coordinate of the repeaters to be airborne position reference nodes, on the basis of the orthographically projected coordinates of the repeaters and the weight center coordinate of the repeaters.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/001,684Filed 25 Aug 2020

Priority

KR 10-2019-010457226 Aug 2019

Published

4 Mar 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01S 19/115
Wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters: airborne or satellite based…
G01S 19/29
Acquisition or tracking or demodulation of signals transmitted by the system: carrier including Doppler, related
G01S 19/252
Involving aiding data received from a cooperating element, e.g. assisted GPS: employing an initial estimate of location in generating assistance data
G01S 19/28
Acquisition or tracking or demodulation of signals transmitted by the system: satellite selection

Apparatus and method of selecting airborne position reference node

Life of this patent

Apparatus and method of selecting airborne position reference node

Life of this patent

Abstract

Claims15