Disclosed in the present invention is an MFCC feature encoding-based combined ultrawideband cross polarization chipless RFID tag, comprising a tag patch unit, a dielectric substrate, and a grounding layer. The tag patch unit comprises a barcode type resonant unit and a double L-shaped resonant unit. The barcode type resonant unit is formed by arranging five identical rectangular patches in parallel and rotating same counterclockwise. The double L-shaped resonant unit is formed by reversely combining two L-shaped patches that are composed of four identical rectangular patches. A transmitting antenna transmits a horizontally polarized electromagnetic wave as an interrogation signal; scattered waves of the signal reflected by the tag are obtained by a receiving antenna; a receiver obtains a spectrum of the scattered waves; the spectrum is converted into a time domain signal by means of inverse Fourier transform; a response to the tag is extracted by means of a window; an MFCC feature is extracted by means of steps such as pre-emphasis and short-time Fourier transform. A 2-8 GHz MFCC feature encoding mode is achieved by means of the tag, thereby achieving encoding of 15 bits in total. The present invention has the advantages of being low in cost, large in encoding capacity, and easy to be detected in the actual environment.
MFCC FEATURE ENCODING-BASED COMBINED ULTRAWIDEBAND CROSS POLARIZATION CHIPLESS RFID TAG