Title: Detection enhancement for RFID systems

Authors: Nadhir Ben Halima; Sajid Mubashir Sheikh

Addresses: Department of Information Technology, Community College of Qatar, Doha, 7344, Qatar ' Department of Electrical Engineering, University of Botswana, Private Bag UB 0061, Gaborone, Botswana

Abstract: In this paper, we suggest to maximise the average number of detected tags (ANDTs) of radio frequency identification (RFID) by optimising packet energies of hybrid automatic repeat request protocol. Our results are valid for additive white Gaussian noise (AWGN) channels as well as Rayleigh fading channels. We optimise the ANDT when automatic repeat request (ARQ) or HARQI are used to transmit the electronic product code (EPC). The results are extended to ARQ and HARQI with chase combining (CC) where received packet are maximum ratio combined (MRC) to maximise the ANDT. Our results are valid for Rayleigh and additive white gaussian noise channels. Optimised HARQ allows 0.4-2.3 dB gain with respect to conventional HARQ.

Keywords: radio frequency identification; RFID; automatic repeat request; ARQ; hybrid automatic repeat request; HARQ; chase combining; ALOHA.

DOI: 10.1504/IJSNET.2024.141612

International Journal of Sensor Networks, 2024 Vol.46 No.1, pp.39 - 44

Received: 15 Mar 2024
Accepted: 26 Jun 2024
Published online: 26 Sep 2024 *

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