Method and apparatus for positioning
AssigneeLocaila, Inc
InventorJaihyung Cho
Life of this patent
Estimating the term…
Abstract
Provided is a positioning method performed by a user equipment (UE). The positioning method includes receiving reference signals from a plurality of base stations; acquiring phase difference information depending on a wavelength of at least one subcarrier among subcarriers included in the reference signals; calculating first estimated coordinates of the UE based on first phase difference information depending on a wavelength of a first subcarrier among the subcarriers; and calculating a first travel distance difference between the reference signals from the first estimated coordinates and estimating integer ambiguity of a second phase difference depending on a wavelength of a second subcarrier from the first travel distance difference.
Claims18
A positioning method performed by a user equipment (UE), the positioning method comprising:
- receiving reference signals from a plurality of base stations;
- acquiring phase difference information depending on a wavelength of at least one subcarrier among subcarriers comprised in the reference signals;
- calculating first estimated coordinates of the UE based on first phase difference information depending on a wavelength of a first subcarrier among the subcarriers;
- calculating a first travel distance difference between the reference signals from the first estimated coordinates and estimating integer ambiguity of a second phase difference depending on a wavelength of a second subcarrier from the first travel distance;
- difference;
- calculating kth estimated coordinates based on kth phase difference information depending on a wavelength of kth subcarrier;
- and
- calculating a kth travel distance difference from the kth estimated coordinates and estimating integer ambiguity of a (k+1)-th phase difference depending on a wavelength of a (k+1)-th subcarrier from the kth travel distance difference,
- wherein the calculating of the kth estimated coordinates and the estimating of the integer ambiguity of the (k+1)-th phase difference is repeated until a preset termination condition is met, and k denotes a natural number.
A positioning apparatus comprising:
- a communicator;
- and
- a processor configured to connect to the communicator,
- wherein the processor is configured to perform a process of receiving reference signals from a plurality of base stations, a process of acquiring phase difference information depending on a wavelength of at least one subcarrier among subcarriers comprised in the reference signals, a process of calculating first estimated coordinates of a user equipment (UE) based on first phase difference information depending on a wavelength of a first subcarrier among the subcarriers, and a process of calculating a first travel distance difference between the reference signals from the first estimated coordinates and estimating integer ambiguity of a second phase difference depending on a wavelength of a second subcarrier from the first travel distance difference, and
- wherein the processor is configured to further perform a process of calculating kth estimated coordinates based on kth phase difference information depending on a wavelength of a kth subcarrier, and a process of calculating a kth travel distance difference from the kth estimated coordinates and estimating integer ambiguity of a (k+1)-th phase difference depending on a wavelength of a (k+1)-th subcarrier from the kth travel distance difference, and
- the process of calculating the kth estimated coordinates and the process of estimating the integer ambiguity of the (k+1)-th phase difference is repeated until a preset termination condition is met, and k denotes a natural number.
Dependencies are inferred from the claim text.