| 1. |
- Zhang, Lu, et al.
(författare)
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An innovative fully printable RFID technology based on high speed time-domain reflections
- 2006
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Ingår i: 2006 Conference on High Density Microsystem Design and Packaging and Component Failure Analysis (HDP '06), Proceedings. - 1424404886 ; , s. 148-152
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present an innovative, chipless and fully printable RFID technology. The proposed tag is a fully passive device. Neither power supply nor. chip assembly is required. In our design, information data is embedded in the tag as impedance mismatches along a transmission line. The RFID-reader sends a short time pulse modulated at high frequencies. The reflections due to the impedance mismatches in the tag are transmitted back and detected by the reader. A prototype of the tag has been constructed and tested. The idea has been successfully proven both by simulations and experimental measurements.
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| 2. |
- Zhang, Zhi, et al.
(författare)
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Two-layered wireless sensor networks for warehouses and supermarkets
- 2009
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The rapid development of wireless sensor network and RFID technologies offers a wide range of novel applications and services. In this paper, we present a two-layered wireless network for warehouses and supermarkets to monitor goods storage and sale, and assist for quality management and market analysis. The hierarchical architecture uses IEEE 802.15.4a impulse ultra-wideband radio (IR-UWB) communication protocol between slave sensor nodes and master sensor nodes, and IEEE 802.11b/g between master sensor nodes and server. The performance of our proposal is evaluated based on the widely used OMNeT++ simulation environment. Simulation results are presented and discussed according to different sampling rates and traffic loads for specific scenarios requirements. © 2009 IEEE.
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| 3. |
- Zheng, Lirong, et al.
(författare)
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Future RFID and Wireless Sensors for Ubiquitous Intelligence
- 2008
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Ingår i: 26th Norchip Conference, Norchip. ; , s. 142-149
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Konferensbidrag (refereegranskat)abstract
- Next generation RFID towards ubiquitous wireless sensing and identification requires high network throughput along with long operation range and ultra low energy consumption. In this paper, we review future RFID for ubiquitous intelligence and their technology needs from system to device perspectives. As a promising enabling technology, ultra wideband radio (UWB) and its use in various RFID implementations are investigated. A special focus on an UWB/UHF hybrid passive RFID and sensor system with asymmetric wireless links is studied as an example. Unlike conventional RFID systems relying on backscattering and narrowband radio, UWB is introduced as the uplink for tag to reader communication. It enables a high network throughput (2000 tag/sec), high data bandwidth (100MHz pulse rate), under ultra low power and low cost constraint. The hardware implementation in silicon level is also presented. Finally, applications of the system in intelligent warehouse and fresh food tracker are introduced.
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| 4. |
- Zheng, Li-Rong, et al.
(författare)
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System-on-flexible-substrates : Electronics for future smart-intelligent world
- 2006
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Ingår i: 2006 Conference on High Density Microsystem Design and Packaging and Component Failure Analysis (HDP '06), Proceedings. - NEW YORK : IEEE. - 1424404886 ; , s. 29-36
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present architecture, circuit implementation and integration issues of embedded smart systems on flexible substrates for future ubiquitous intelligent world. The work is exampled by several concepts of innovative, self-powered, Ion I g-range interconnected radio-frequency identification and sensor networks in warehouse and intelligent goods distribution systems. Two types of RFID concepts are designed for this network. The first one is a self-powered, ultra-low power UWB RFID. A power scavenging system is designed which can draws energy from the 802.11 access point and its surrounding electromagnetic waves. In the second demonstration, we developed a chipless passive RFID based on time-domain reflection principle. As this RFID is chipless and needs only interconnections and antenna, it is potentially fully printable on flexible substrate such as a paper board. Finally, some implementation and experimental results are presented.
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