Shanti Garman;Ali Saffari;Daisuke Kobuchi;Dara Stotland;Joshua R. Smith;Zerina Kapetanovic
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引用次数: 0
摘要
在这项工作中,我们证明了在没有载波的情况下读取超高频 RFID 标签是可能的。具体来说,我们引入了一种不发射载波的替代读取器设计,可以读取传统载波系统使用的 RFID 标签。传统的 RFID 标签会对载波进行调制,但值得注意的是,用于反向散射的调制电路也会对标签电路的固有噪声(包括约翰逊噪声)进行调制,而与载波存在与否无关。我们的调制噪声通信(MNC)方法利用了最近在调制约翰逊噪声(MJN)方面的研究成果,可通过另一种射频识别(RFID)读取器设计进行读取,与传统的反向散射读取器相比,这种读取器消除了自干扰障碍,读取起来更简单、更方便。MNC 支持在标准 UHF RFID 标签和拟议的替代读取器之间 2 厘米至 10 厘米的距离内无线传输数据包,数据传输速率为 1 bps 和 2 bps。
Carrier-Free RFID: Using Modulated Noise Communication to Read UHF RFID Tags
In this work, we demonstrate that it is possible to read UHF RFID tags without a carrier. Specifically, we introduce an alternative reader design that does not emit a carrier and allows reading RFID tags intended for conventional carrier-based systems. While traditional RFID tags modulate a carrier, it is important to note that a modulation circuit used for backscatter also modulates the inherent noise of the tag circuitry, including the Johnson noise, irrespective of whether a carrier is present or not. Our Modulated Noise Communication (MNC) approach leverages recent work on Modulated Johnson Noise (MJN) and can be read by an alternative RFID reader design that enables simpler, more accessible RFID readings than a conventional backscatter reader by eliminating self-jamming obstructions. MNC is shown to support wireless transmission of data packets between 2 cm to 10 cm of separation between a standard UHF RFID tag and the proposed alternative reader for data rates of 1 bps and 2 bps.