Invention Grant
- Patent Title: Method for locating a connected object by phase differences of arrival in an LPWA network
-
Application No.: US17318185Application Date: 2021-05-12
-
Publication No.: US11668785B2Publication Date: 2023-06-06
- Inventor: Florian Wolf , Sébastien De Rivaz , François Dehmas
- Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Applicant Address: FR Paris
- Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Current Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
- Current Assignee Address: FR Paris
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: FR 04730 2020.05.13
- Main IPC: G01S5/06
- IPC: G01S5/06 ; G01S5/02 ; H04W64/00

Abstract:
A method for locating a connected object within an LPWA network using a plurality of base stations. The connected object transmits packets in RF frequency channels forming a virtual band being scanned once in the uplink direction and once in the downlink direction in a symmetrical manner. The base stations receiving the signal perform an RF to intermediate frequency translation and then a baseband translation in digital mode. The phase differences of arrival for each pair of base stations and the attenuation coefficients of each transmission channel between the connected object and each base station enable a composite transfer function to be constructed for each pair of base stations. The peaks of highest amplitude are detected in the corresponding impulse responses and the distance differences between the connected object and the different base stations are derived therefrom. The position of the object is then estimated by hyperbolic trilateration.
Public/Granted literature
- US20210356553A1 METHOD FOR LOCATING A CONNECTED OBJECT BY PHASE DIFFERENCES OF ARRIVAL IN AN LPWA NETWORK Public/Granted day:2021-11-18
Information query