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United States of America Patent

PATENT NO 9069058
APP PUB NO 20140169136A1
SERIAL NO

14110376

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Static transmitter stations are used to determine the position of a mobile receiver unit. Each transmitter station transmits an ultrasonic signal including a transmitter-specific phase-shifting signature. The receiver unit receives a signal and identifies a transmitter station by its signature. It uses the received signal and the identity of the source transmitter station to determine the position of the mobile receiver unit. The signature may include two patterns phase-shift-key (PSK)-encoded on respective carrier signals of the same frequency but different phase, with the patterns being offset from each other by a transmitter-specific offset. The signal from the transmitter station may also include a PSK-encoded message.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
SONITOR TECHNOLOGIES ASDRAMMENSVEIEN 288 OSLO 0283

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Booij, Wilfred Edwin Nordby, NO 65 299
Olsen, Øysten Haug Asker, NO 3 26

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