Active geo-location for orthogonal frequency division multiplex wireless local area network devices using additive correlation in the time domain

Active geo-location for orthogonal frequency division multiplex wireless local area network devices using additive correlation in the time domain

A method in a wireless device (WD) is described. The method is performed for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD to the target station and a plurality of response signals received from the target station. The me...

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Hauptverfasser: Fernandez, Olivia, Smith, Graham K, Busser, Ryan
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
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creator Fernandez, Olivia
Smith, Graham K
Busser, Ryan
description A method in a wireless device (WD) is described. The method is performed for determining a geo-location of a target station using round-trip times (RTTs) of a plurality of signals transmitted by the WD to the target station and a plurality of response signals received from the target station. The method includes determining expected time domain symbols of an expected response signal, and, for each transmitted signal of the plurality of signals, determining a first time, opening a reception window for receiving a response signal, receiving the response signal within the reception window, frequency shifting the expected time domain symbols, and cross-correlating the time domain symbols with the frequency shifted expected time domain symbols. In addition, the method includes determining a peak correlation value, a second time, and the RTT for each one of the transmitted plurality of signals based at least on the first time and the second time.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
WIRELESS COMMUNICATIONS NETWORKS
title Active geo-location for orthogonal frequency division multiplex wireless local area network devices using additive correlation in the time domain
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