Determining the geographic location of a mobile communications device using a positioning reference signal
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United States of America Patent
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Jun 18, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jan 26, 2016
filing date -
Feb 18, 2015
priority date (Note) -
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Abstract
A communications device includes: a receiver configured to receive signals including at least one positioning reference signal transmitted in each of a plurality of time units; at least one antenna connected to the receiver; a motion detector configured to determine a relative local position of the communications device; and a controller configured to generate a measurement data set including plural measurement samples of at least a phase of the positioning reference signal according to a sampling rate, and a location of the communications device at which the phase of the positioning reference signal was determined. The controller is configured to estimate a relative angle of arrival of the received radio signals, used to determine an estimation of a location of the communications device, wherein the controller is configured to adapt at the rate of sampling to generate the measurement data set in accordance with predetermined conditions.
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