SYSTEM AND METHOD FOR MICROWAVE RANGING TO A TARGET IN PRESENCE OF CLUTTER AND MULTI-PATH EFFECTS
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United States of America Patent
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Issued Date -
Oct 15, 2015
app pub date -
Jun 10, 2014
filing date -
Jun 17, 2010
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Abandoned
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Abstract
A system for measuring the range to an RFID tag including situations containing high clutter and multi-path signals is disclosed. The system includes an RFID reader; an RFID tag; and a coordinated pulse compression radar system. In the system the RFID reader causes the tag to respond to received signals in a first backscatter state at a first time and a second backscatter state at a second time. The pulse compression radar system transmits short pulses coordinated by the backscatter state of the RFID tag and the system creates a differential signal comprised of the differences between radar signals obtained during the first and second states of the tag to obtain an uncorrupted measure of a round trip time of flight of said radar pulses between the pulse radar system and the RFID tag.
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