RFID decoding method based on visible light space-time coding, medium, device and system

The invention discloses an RFID decoding method based on visible light space-time coding, a medium, equipment and a system. The method comprises the following steps: collecting a return signal of an RFID tag connected with a photodiode in parallel on an RFID chip; adopting a coarse-grained optical s...

Full description

Saved in:
Bibliographic Details
Main Authors HUI WEI, HAN LUBING, DING HAN, WANG GE, ZHAO JIZHONG, CHANG YUANCE
Format Patent
LanguageChinese
English
Published 21.01.2022
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
Online AccessGet full text

Cover

More Information
Summary:The invention discloses an RFID decoding method based on visible light space-time coding, a medium, equipment and a system. The method comprises the following steps: collecting a return signal of an RFID tag connected with a photodiode in parallel on an RFID chip; adopting a coarse-grained optical switching signal positioning technology, using an RFID tag for returning a signal, using a prefix of a decoding reader for positioning the position between an ACK instruction and a Query/QRep instruction, and acquiring an EPC signal with 24-96 data bits; re-sampling the EPC signal, dividing every three sampled signal points into one group, and selecting a maximum value H and a minimum value L from each group of signal points according to frequency; calculating corresponding phase jump by calculating a difference value of two adjacent groups of H-L, marking a phase jump value as a candidate entity, after a false candidate entity caused by frequency deviation is removed, obtaining a specific candidate group and a time
Bibliography:Application Number: CN202111130038