Peter H. Cole

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For a dense RFID reader deployment, such as in warehouse RFID deployment, where hundreds of antennas are positioned in a building, the interference between all these readers must be studied carefully to avoid severe reader collisions. Strict RFID regulations and standards have been imposed, trying to address the problem of reader collision and also the(More)
⎯ RFID has its many applications, one use of this technology is for livestock identification. Animals such as cattle and sheep are tagged for purposes such as disease control, breeding management and also stock management. In this paper, a small passive RFID tag that can be attached to an animal's ear and operating at UHF is presented. This paper covers the(More)
The study and analysis of RFID antenna positioning is important for supply chain large-scale deployment. In a dense reader environment, there are multiples of RFID readers and readers interference reduces the reliability and efficiency of the RFID system. In the worst case, the interference would paralyse an entire RFID system. This paper explores antenna(More)
* Passive UHF Radio Frequency Identification (RFID) tags are potentially low cost and offer good read range for object identification in various types of applications. However, the performance of conventional passive UHF RFID tags will be greatly affected when the tags are attached to metallic objects. In this paper, a small passive UHF RFID tag consisting(More)
Meander line dipole antennas (MDA) are useful as radio frequency identification (RFID) tag antennas because of their relatively high radiation efficiency and small size. A method has been proposed recently to obtain the resonant frequency of an MDA by calculating its inductance. According to this method, the resonant characteristics of MDA are related to(More)
—For a dense RFID reader deployment, such as in a warehouse, where hundreds of readers will be positioned in a building, the interference between all these readers must be studied carefully to avoid disruption of operations. Strict RFID regulations and standards have been imposed, trying to address the problem of reader collision and also the problem of(More)
One time codes, originated from the works of Vernam (Vernam cipher (1917)), and Capt Joseph Maubourne around the same time. They have been used in military for the highest secret communications. One-time codes are the most secure means of encryption. They were proven to be ideal secret codes by Shannon (1949). When using one-time codes, both the sender and(More)
Reader collision is not only limited to the interference between interrogator signals from different RFID readers, but to maintain low RFID tag cost, an RFID tag cannot filter a valid interrogation signal in a channel from another valid interrogation signal in another channel. Second Carrier Sensing is then introduced to solve this problem. This paper(More)