Method for locating a connected object by phase differences of arrival in an LPWA network

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United States of America Patent

PATENT NO 11668785
APP PUB NO 20210356553A1
SERIAL NO

17318185

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

  • COMMISSARIAT A L' ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
De, Rivaz Sébastien Grenoble, FR 4 0
Dehmas, François Grenoble, FR 5 2
Wolf, Florian Grenoble, FR 29 257

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