Short Time Fourier Transform (STFT) for collision detection in chipless RFID systems

This method proposes a novel collision detection methodology in chipless RFID system. The tags are interrogated by a impulse radio ultra wideband signal (IR-UWB). The collided backscattered signal received from the interrogation zone is analyzed in time-frequency plane through Short Time Fourier Transform (STFT). From the time-frequency representation, multiple tag IDs can be easily decoded. The simulation results prove the potentiality of the method as an efficient collision detection technique for chipless RFID systems.

[1]  Nemai Karmakar,et al.  Time domain analysis of a backscattering frequency signature based chipless RFID tag , 2011, Asia-Pacific Microwave Conference 2011.

[2]  A. Lazaro,et al.  IR-UWB radar system and tag design for time-coded chipless RFID , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[3]  Nemai Karmakar,et al.  A collision avoidance methodology for chipless RFID tags , 2011, Asia-Pacific Microwave Conference 2011.

[4]  Cj Railton,et al.  European Conference on Antennas and Propagation , 2007 .

[5]  Douglas L. Jones,et al.  Instantaneous frequency estimation using an adaptive short-time Fourier transform , 1995 .

[6]  N.C. Karmakar,et al.  Phase-Encoded Chipless RFID Transponder for Large-Scale Low-Cost Applications , 2009, IEEE Microwave and Wireless Components Letters.

[7]  S. Tedjini,et al.  A compact chipless RFID tag using polarization diversity for encoding and sensing , 2012, 2012 IEEE International Conference on RFID (RFID).

[8]  R. V. Koswatta,et al.  A Novel Reader Architecture Based on UWB Chirp Signal Interrogation for Multiresonator-Based Chipless RFID Tag Reading , 2012, IEEE Transactions on Microwave Theory and Techniques.

[9]  N. C. Karmakar,et al.  Efficient Collisi , 2022 .

[10]  Nemai Karmakar,et al.  A spectrally efficient chipless RFID tag based on split-wheel resonator , 2014, 2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT).

[11]  N. Karmakar,et al.  Compact printable chipless RFID tags using polarization diversity , 2012, 2012 9th European Radar Conference.