Multipacket Reception of Passive UHF RFID Tags: A Communication Theoretic Approach

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Executive Summary

This paper develops a communication theoretic model for the design and analysis at the physical layer of a reader receiver structure for passive UHF Radio Frequency IDentification (RFID). This is to attain multi-packet reception capabilities which in turn help the fast resolution of multiple tags through a more rapid and power efficient arbitration of the tags collisions. In particular, the authors derive a parametric continuous time model for the subspace of a tag signal at the noisy receiver/reader, which in addition to being affected by fading and receiver delay, exhibits wide variations in the symbol frequency and transmission delay, due to imperfections in the RFID hardware design.

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