Weak RFID tag signal recovery from collisions
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United States of America Patent
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Jan 30, 2018
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app pub date -
Jun 20, 2017
filing date -
Nov 14, 2014
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Abstract
RFID readers may be configured to recover weak RFID tag signals from collisions with stronger RFID tag signals. An RFID reader may receive a combined tag response including a strong tag response and a weak tag response. The reader recovers the strong and weak tag responses using source separation. In one example, the reader may recover the strong tag response from the combined tag response and remove the recovered tag response from the combined tag response to form a modified tag response. The reader may then recover the weak tag response from the modified tag response.
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