Improving the performance of UHF RFID communication in a small scale fading channel

Smietanka, Grzegorz; Goetze, Juergen

doi:10.1109/rfid.2014.6810720

Cited by 2 publications

(3 citation statements)

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“…In [18], the authors introduce differential decoding which takes the previous and next bit into account for the decoding process. In combination with a modified Miller 8 encoding they achieve a 26.2 dB performance gain…”

Section: Related Workmentioning

confidence: 99%

“…A common approach uses a less accurate but simpler common Rayleigh fading channel with AWGN (e.g., in [13], [17], [18]). As small scale fading is highly specific for the considered scenario and not generally transferable, the authors of [1] focus on AWGN and Burst Noise instead.…”

Section: A Channel Modelmentioning

confidence: 99%

“…In addition, as backscattering is a type of On-Off Keying (OOK), assuming correct channel estimation [18], the transmitted signal is fully described by its real component.…”

Section: A Channel Modelmentioning

confidence: 99%

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Improving UHF RFID read rates by juggling selected bits

Bothe

Aschenbruck

2016

2016 IEEE International Conference on RFID (RFID)

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Increasing the robustness of EPCglobal Class 1 Generation 2 ultra-high frequency (UHF) Radio Frequency IDentification (RFID) communication is crucial for deployments in challenging scenarios, such as tags moving at high speeds or under harsh environmental conditions. It becomes even more important when sensor data has to be read at high data rates with low robustness modulation schemes. In this paper, our goal is to increase the RFID read rates for different modulation schemes at various Signal to Noise Ratios (SNRs). We propose and evaluate a selected subset of improvements, which can be implemented purely on the reader side and conform to the standard. First, we compare various combinations of clock recovery and bit decoding strategies. The results show, that the performance of individual combinations varies with the uplink encoding and SNR. The overall read rate can be improved if multiple combinations are used simultaneously. Second, we introduce and evaluate a basic soft-decision approach, which attempts to correct bit errors based on the calculated bit correlation scores. Overall, we can improve the read rates in our simulations by up to 31 %.

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Section: Related Workmentioning

confidence: 99%