Digital Radio Receiver for an UHF-RFID System with an Undersampling Digitalization Scheme

Konferenz: RFID SysTech 2011 - 7th European Workshop on Smart Objects: Systems, Technologies and Applications
17.05.2011 - 18.05.2011 in Dresden, Germany

Tagungsband: RFID SysTech 2011

Seiten: 5Sprache: EnglischTyp: PDF

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Grey, Salvador; Bögel, Gerd von; Meyer, Frederic; Grabmaier, Anton (Fraunhofer IMS, Duisburg, Germany)

This paper describes a digital radio receiver for UHF-RFID systems based on an undersampling scheme for the signal digitalization. The original UHF signal is transferred into a digital intermediate frequency by means of undersampling. The sampled signal is transfered to an FPGA where it is decimated by a CIC filter, and demodulated using a digital I-Q demodulator. The baseband signal is obtained after the low-pass filtering. The details of the system are presented as well as some measurements.