REMOTE CONTROL SYSTEM, AND METHOD FOR AUTOMATICALLY LOCKING AND/OR UNLOCKING AT LEAST ONE MOVABLE PANEL OF A MOTOR VEHICLE AND/OR FOR STARTING A MOTOR VEHICLE ENGINE USING A REMOTE CONTROL SYSTEM
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United States of America Patent
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Issued Date -
Nov 6, 2014
app pub date -
Oct 11, 2012
filing date -
Oct 11, 2011
priority date (Note) -
Abandoned
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Abstract
A remote control system and method are disclosed for automatically locking and/or unlocking at least one movable panel of a motor vehicle and/or for starting a motor vehicle engine. The remote control system includes a vehicle module to be installed inside the vehicle and a portable module to be carried by a user. The remote control system is capable of determining the distance between the vehicle module and the portable module via a first radiofrequency signal emitted by an antenna combined with the vehicle module, and a second radiofrequency signal emitted by an antenna combined with the portable module, the first radiofrequency signal being a signal obtained by phase or frequency modulation. The second radiofrequency signal is obtained by a phase-locked loop in the portable module that uses the first radiofrequency signal as a reference for generating the second radiofrequency signal.
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