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Li-rong Zheng - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

  • ISCAS - A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

Majid Baghaei-nejad - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

  • ISCAS - A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

Hannu Tenhunen - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

  • ISCAS - A Novel Passive Tag with Asymmetric Wireless Link for RFID and WSN Applications
    2007 IEEE International Symposium on Circuits and Systems, 2007
    Co-Authors: Majid Baghaei-nejad, Hannu Tenhunen, Li-rong Zheng
    Abstract:

    In this paper, we present a radio-powered module with asymmetric wireless link utilizing ultra wideband radio system for RFID and wireless sensor applications. Our contribution includes using two different standards in uplink and downlink. Such as conventional RFIDs, incoming RF signal transmitted by reader is used to power the internal circuitry and receive the data. However, in upstream link, an IR-UWB transmitter is utilized. Unlike traditional RFID systems, due to great advanTages of UWB communication, this Tag is very robust to multi-path fading and collision problem and it is more secure against eavesdropping or jamming. The module consists of a power scavenging unit, a RF receiver, an IR-UWB transmitter, digital baseband controller, and an embedded UWB antenna are designed for integration on liquid-crystal polymer (LCP) substrate, using 0.18mum CMOS process technology.

Joseph A Paradiso - One of the best experts on this subject based on the ideXlab platform.

  • wireless hand gesture capture through wearable Passive Tag sensing
    Wearable and Implantable Body Sensor Networks, 2011
    Co-Authors: Rachel Bainbridge, Joseph A Paradiso
    Abstract:

    For wearable computing to become more widely accepted, the associated Human-Computer Interface must move past today's keyboard, keypad, touch screen, or other bulky hand-held interfaces to allow a user to specify input through their fingers without taking their eyes and attention off their immediate focus. Accordingly, we have developed a wearable system to track hand gestures with Passive RFID sensor Tags. This system is composed of an ultra-high frequency (UHF) reader and small, Passive, finger-worn Tags powered by transmit RF energy, each equipped with a variety of sensors that could be used to detect gestures. The primary physical goals of the system were to be comfortable and wearable without interfering with other everyday activities while tracking particular hand movements that could be used to control a wearable computer or aid in interaction with ubiquitous or other wearable devices. This paper first introduces our hardware, then gives some example user interface implementations, such as a mouse scrolled by hand position and a click specified by finger proximity, entering input by touching fingers, setting options when moving the hand to a particular spot of the user's apparel labeled with a Passive RFID Tag, and otherwise mapping control onto motion of the hand, arm, and fingers. The overall system was fully functional, but as this is an early implementation, it was still very much limited by transmit power and antenna efficiency, due to the constraints on the size of the Passive Tags. Means of scaling to lower power and smaller size are suggested.

  • BSN - Wireless Hand Gesture Capture through Wearable Passive Tag Sensing
    2011 International Conference on Body Sensor Networks, 2011
    Co-Authors: Rachel Bainbridge, Joseph A Paradiso
    Abstract:

    For wearable computing to become more widely accepted, the associated Human-Computer Interface must move past today's keyboard, keypad, touch screen, or other bulky hand-held interfaces to allow a user to specify input through their fingers without taking their eyes and attention off their immediate focus. Accordingly, we have developed a wearable system to track hand gestures with Passive RFID sensor Tags. This system is composed of an ultra-high frequency (UHF) reader and small, Passive, finger-worn Tags powered by transmit RF energy, each equipped with a variety of sensors that could be used to detect gestures. The primary physical goals of the system were to be comfortable and wearable without interfering with other everyday activities while tracking particular hand movements that could be used to control a wearable computer or aid in interaction with ubiquitous or other wearable devices. This paper first introduces our hardware, then gives some example user interface implementations, such as a mouse scrolled by hand position and a click specified by finger proximity, entering input by touching fingers, setting options when moving the hand to a particular spot of the user's apparel labeled with a Passive RFID Tag, and otherwise mapping control onto motion of the hand, arm, and fingers. The overall system was fully functional, but as this is an early implementation, it was still very much limited by transmit power and antenna efficiency, due to the constraints on the size of the Passive Tags. Means of scaling to lower power and smaller size are suggested.

Mojgan Daneshmand - One of the best experts on this subject based on the ideXlab platform.

  • Wireless Passive RFID sensor for pipeline integrity monitoring
    Sensors and Actuators A: Physical, 2017
    Co-Authors: Mohammad Hossein Zarifi, Sameir Deif, Mojgan Daneshmand
    Abstract:

    This work presents a chipless RFID-based sensor for pipeline integrity monitoring in real-time fashion. The sensor monitors the coating lift-off from the pipeline, which is the initial step in external corrosion of a metal pipe. The sensor has a readout coil and an LC resonator on the Passive Tag with an interdigitated capacitor. The resonant frequency of the sensor demonstrates a strong relation to the gap between the coating and the metal pipe. The Tag is built on a flexible substrate for wrapping around the pipe and to represent the pipe coating. The sensor is conformal, battery-free, and low cost which makes it suitable for pipeline monitoring in harsh environments. The resonator was tuned to 105 MHz with a Q factor of ∼115. The sensor demonstrates the maximum resonant frequency change of 11.7%, when 2 Standard Cubic Centimeter per Minute (SCCM) of air lifts the coating; and 7.46% when 4 mL of water ingress happens in between the coating and the pipe. This sensor has advanTages of inexpensiveness, simplicity, and long lifetime with potential capability of prediction prior to failure in pipeline systems.