Performance improvement of multiple-antenna RFID tags using limited feedback schemes in ISO 18000-7 standard

Radio Frequency IDentification (RFID) is a pervasive wireless technology to automatically identify, track, locate objects or people. RFID technology falls into three categories with respect to tags´ energy source: passive, semi-passive and active. Active RFID tags are preferred in many applications for their advantages: Visibility, security, quality and high distance communication. ISO/IEC 18000-7, operating at 433 MHz, is one of the active RFID standards. We realize that a tag consumes too much energy source to perform a satisfactory communication compliance with the standard in Rayleigh fading channel. Motivated by this need, in this paper, we aim to ameliorate a RFID system performance from the perspective of better communication and energy efficiency. Detailed and extensive simulations show that multiple-antenna designs at tag side using limited feedback schemes significantly decreases the frame error rates and increases the battery lifetime.