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27448 The effects of single bit quantization on direction of arrival estimation of UHF RFID tags
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Huiting, J. and Kokkeler, A.B.J. and Smit, G.J.M. (2016) The effects of single bit quantization on direction of arrival estimation of UHF RFID tags. In: 2016 IEEE International Conference on RFID Technology and Applications (RFID-TA), 21-22 Sept 2016, Shunde, China. pp. 55-60. IEEE Communications Society. ISBN 978-1-5090-1409-5

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Official URL: http://dx.doi.org/10.1109/RFID-TA.2016.7750731

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Abstract

Phased arrays can be used to estimate the direction-of-arrival (DOA) of UHF RFID tags. To save on energy consumption and hardware costs, in this paper we explore the possibility of using single bit analog-to-digital converters for our phased array setup. This setup consists of an off-the-shelf Impinj R2000 reader and a custom phased array with 4 receiving channels. The proposed system quantizes the baseband quadrature signals individually. As there is a direct relation between the correlation coefficient of a quantized signal and an unquantized signal, the error introduced by quantization can be corrected. The experimental results show that single bit quantization can be used for DOA estimation and the mean error increases only slightly. The proposed correction achieves better results than uncorrected quantized estimation, at the cost of the need for signal power measurements.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-CAES: Computer Architecture for Embedded Systems
Research Program:CTIT-General
Research Project:TSP: Tracking, tracing, Sensoring Platform
Uncontrolled Keywords:UHF RFID, Phased array, quantization, MUSIC
ID Code:27448
Status:Published
Deposited On:16 December 2016
Refereed:Yes
International:Yes
More Information:statisticsmetis

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