Title :
Impact of the correlation between forward and backscatter channels on RFID system performance
Author :
He, Chen ; Wang, Z. Jane
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada
Abstract :
The channel of radio frequency identification (RFID) can be modeled as a cascaded channel consisting of a forward link and a backscatter link. The correlation between the forward and backscatter links strongly affects the bit-error-rate (BER) performance of RFID systems. In this paper, we analytically study how the link correlation affects the BER performance of a single-input, multiple-output (SIMO) RFID system. We de rive exact forms and asymptotic forms of the BER for SIMO RFID systems with maximal ratio combining (MRC) at the reader side. The asymptotic forms provides an insight into the relationship between the link correlation and the BER perfor mance. It is shown that the BER is an increasing function of the magnitude of link correlation in the high SNR regime and is proportional to (1 + ρ2)L/(1 - ρ2)L in the extremely high SNR regime for an L branch channel.
Keywords :
backscatter; diversity reception; error statistics; radiofrequency identification; wireless channels; BER performance; L branch channel; MRC; RFID system performance; SIMO RFID system; SNR regime; backscatter link cascaded channel; bit-error-rate performance; forward link cascaded channel; link correlation impact; maximal ratio combining; radio frequency identification system performance; single-input multiple-output RFID system; Approximation methods; Backscatter; Bit error rate; Correlation; Fading; Radiofrequency identification; Signal to noise ratio; Asymptotic; Link correlation; RFID; SIMO;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0538-0
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2011.5946242