Positioning method and apparatus using wireless signal
AssigneeElectronics and Telecommunications Research Institute
InventorJai Hyung Cho
Life of this patent
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Abstract
A terminal that receives carrier signals with start point information indicated thereon from three or more base stations (BSs) including a serving BS, calculates a difference in phase angles between carrier signals of two BSs while changing the two BSs by using the start point information of the carrier signals of the two BSs among the three or more BSs, and calculates coordinates of the terminal by using the calculated differences in distance of arrival is provided.
Claims20
A positioning method of a terminal using a wireless signal, the method comprising:
- receiving carrier signals with start point information indicated thereon from three or more base stations (BSs) including a serving BS;
- calculating a difference in phase angles between carrier signals of two BSs, while changing the two BSs, by using the start point information of the carrier signals of the two BSs among the three or more BSs;
- calculating differences in distances of arrival from the corresponding two BS to the terminal by using the calculated differences in phase angles;
- and
- calculating coordinates of the terminal by using the calculated differences in distances of arrival.
A positioning apparatus of a terminal using a wireless signal, the apparatus comprising:
- a reception unit configured to receive carrier signals with start point information indicated thereon from three or more nearby base stations (BSs) including a serving BS;
- a phase tracking unit configured to detect a start point and a start point period of each of the received carrier signals of the BSs;
- a plurality of phase clock units configured to calculate a phase angle of each of the carrier signals of the BSs with respect to a start point of each of the carrier signals of the BSs;
- and
- a control unit configured to calculate a difference in phase angles between carrier signals of two BSs, among the nearby BSs, while changing the two BSs, calculate a difference in distances of arrival from the corresponding two BS to the terminal by using the calculated differences in phase angles, and calculate coordinates of the terminal by using the calculated differences in distances of arrival.
Dependencies are inferred from the claim text.