Browse > Article

An Adaptive I/Q Diversity Combining Method for UHF RFID Reader Systems  

Yoon, Chang-Seok (한양대학교 전자컴퓨터통신공학부)
Nam, Sung-Sik (한양대학교 전자컴퓨터통신공학부)
Cho, Sung-Ho (한양대학교 전자컴퓨터통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.1B, 2010 , pp. 176-182 More about this Journal
Abstract
In this paper, we propose an adaptive I/Q diversity combining scheme which reduces unnecessary computations while maintaining the required performance level. The system with the proposed scheme adaptively applies a proper combining scheme among the conventional selective scheme and combining scheme based on the comparison result between the estimated instantaneous SNR and the pre-determined threshold. As a result, the system with our proposed scheme can reduce the computational load while maintaining the required performance level. Some selected simulation results show that the system with the proposed scheme can decrease the unnecessary computations compared with the system with the conventional schemes while maintaining the required performance level.
Keywords
RFID reader; Receiver; Diversity;
Citations & Related Records
연도 인용수 순위
  • Reference
1 B.-J. Jang, "Phase Diversity and Optimal I/Q Signal Combining Methods on a UHF RFID Reader's Receiver," Microwave Journal(Web Exclusive), Vol.51, pp.1-14, April 2008.
2 J.-H. Bae, W. Choi, G.-Y. Choi, and J.-S. Chae, "Study on the Demodulator Structure of Reader Receiver in a Passive RFID Environment," Progress In Electromagnetics Research, PIER 91, pp.243-258, 2009.
3 T. C. Chieu and L.-C. Zai, "Data Recovery System for Radio Frequency Identification Interrogator," US: Intermec IP Corp., 2002.
4 Y.-s. Wu and A. R. Shober, "IQ Combiner Technology in Modulated Backscatter System," US: Lucent Technologies, Inc., 1998.
5 M. Simon and D. Divsalar, "Some Interesting Observations for Certain Line codes With Application to RFID," IEEE Trans. Comm., Vol.54, April 2006.
6 J. G. Proakis, Digital communications, 4th ed. Boston: McGraw-Hill, 2001.
7 Y. Okunev and K. J. Powell, "Method and Apparatus for Signal Processing in RFID Receivers," US: Symbol Technologies, Inc., 2007.
8 D. Marculescu, R. Marculescu, and M. Pedram, "Information Theoretic Measures for Power Analysis," IEEE Trans. on CAD, Vol.15, pp.599-610, 1996.   DOI
9 D. M. Dobkin, "The RF in RFID passive UHF RFID in practice," in Communications engineering series Amsterdam ; Boston: Elsevier/ Newnes, 2008
10 안 재명, 이 종태, and 오 해석, EPCglobal Network 기반의 RFID 기술 및 활용: 글로벌, 2007.
11 K. Finkenzeller, RFID handbook : fundamentals and applications in contactless smart cards and identification, 2nd ed. Chichester, England ; New York: Wiley, 2003.
12 H.-C. Yang, "New Results on Ordered Statistics and Analysis of Minimum-Selection Generalized Selection Combining (GSC)," IEEE Trans. WIreless Commun., Vol.5, pp.1876-1885, July 2006.   DOI
13 EPCglobal, "$EPC^{TM}$ radio-frequency identity protocol class-1 generation-2 UHF RFID protocol for communications at 860MHz - 960MHz version 1.1.0," in Specification for RFID air interface, 2005.