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  • 1.
    Gong, Shaofang
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Karlsson, Magnus
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Serban, Adriana
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Owais, Owais
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Östh, Joakim
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Truly Differential RF and Microwave Front-End Design2010Ingår i: IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON), Piscataway, NJ, USA: IEEE , 2010, s. 1-5Konferensbidrag (Refereegranskat)
    Abstract [en]

    New design methodology for truly differential RF and microwave front-ends has been presented in this paper. Baluns are avoided using this design methodology, while achieving differential signaling for high noise immunity. A case study on an ultra-wide band RF front-end in the frequency band 6-9 GHz has been performed using the new design methodology, indicating that both wide bandwidth and high performance can be achieved using this design methodology. A direct comparison between single-ended and differential designs of the RF filter has also been presented in order to verify the correctness of the design methodology.

  • 2.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Flexible cables for massive-parallel high-speed data communications2006Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The demand for high-speed data communications has pushed both the wired and wireless technologies to operate at higher and higher frequencies. Classic Kirchhoffs voltage and current laws cannot be directly applied, when entering the microwave spectrum for frequency > 1 GHz. Instead, the transmission line theory should be used. Most of today's wired communication products use bit-serial cables to connect devices. To transfer massive data at high speed, parallel data transfer techniques can be utilized and the speed can be increased by the number of parallel lines or cables, if the transfer rate per line or cable can be maintained. However, the interference between the lines or cables must to be well-shielded so the crosstalk between them can be minimized.

    Differential lines can also be used to increase the data speed further compared to the single-ended lines, along with saving the power consumption and reducing the electromagnetic interference. However, characterization for the differential lines is not as straight forward as that for the single-ended cases using standard S-parameters. Instead, mixed-mode S-parameters are needed to explain the differential-, common- and mixed-mode characteristics of the differential signal. The mixed-mode S-parameters were first introduced in 1995 and are now widely used. However, improvements of the theory can still be found to increase the accuracy of simulations and measurements.

    This thesis presents a study of massive-parallel conductors on flexible cables. Furthermore, some connectors in combination with the flexible cable are studies for high-speed data transfer. The conversion method for mixed-mode Sparameters has been reviewed and a new method to improve the conversion accuracy has been proposed.

    Delarbeten
    1. Study of high-speed data transfer utilizing flexible and parallel transmission lines
    Öppna denna publikation i ny flik eller fönster >>Study of high-speed data transfer utilizing flexible and parallel transmission lines
    2005 (Engelska)Ingår i: Procedings of International Microelectronics and Packaging Society Nordic,, Pelkosen Painotuote in Kiiminki, Finland , 2005, s. 230-234Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    Today many systems use serial data transfer techniques like serial AT attachment (SATA), Firewire and universal serial bus (USB). However, with parallel techniques the data transfer can be raised to a much higher speed. Having wires in parallel, one must also deal with phenomena such as crosstalk. To overcome crosstalk between parallel lines one must follow some design rules to avoid interference, like optimizing spaces between transmission lines. In this work simulations on high-speed single-ended and parallel channels utilizing microstrips and striplines have been done to show parameters that limit the channel bandwidth and thus the data rate. Design and simulations have been done using the Computer Aided Design (CAD) tool, Advanced Design System (ADS) provided by Agilent Technologies Inc. It is shown that both conductor surface roughness and dielectric loss will introduce extra AC noise to the signal. When having parallel conductors the AC noise increases with decreased rise/fall time, introduced by skin effect, conductor surface roughness and dielectric loss.

    Ort, förlag, år, upplaga, sidor
    Pelkosen Painotuote in Kiiminki, Finland, 2005
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-32317 (URN)18209 (Lokalt ID)18209 (Arkivnummer)18209 (OAI)
    Konferens
    Procedings of International Microelectronics and Packaging Society Nordic, September, Törnsberg, Norway
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2013-12-19
    2. High-speed parallel data transmission utilizing a flex-rigid concept
    Öppna denna publikation i ny flik eller fönster >>High-speed parallel data transmission utilizing a flex-rigid concept
    2005 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Transmission lines utilizing microstrips on a flex-foil with low dielectric loss (tanδ = 0.002) have been simulated to compare with the transmission lines laminated with a rigid part, a so-called flex-rigid structure. At high speeds, even solders, pads and connectors affect the signal integrity because of their parasitic effects. The flex-rigid structure does not require these extra parts, resulting in good signal integrity and thus high data transfer rates. Another advantage with a flexible cable is that dense parallel microstrips can easily be designed. Although many wired data communications utilize serial techniques like Serial AT Attachment (SATA), Universal Serial Bus (USB) and Firewire, the serial data link has its limitations when very high data speeds are required. With a parallel data transmission technique, the data transfer rate can be raised to a very high speed. However, a parallel data transmission technique has some disadvantages such as crosstalk and skew between the signals which must be considered.

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-32318 (URN)18210 (Lokalt ID)18210 (Arkivnummer)18210 (OAI)
    Konferens
    Gigahertz 2005, 8-9 September, Uppsala, Sweden
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2013-12-19
    3. High-Speed Board-to-Board Interconnects utilizing Flexible Foils and Elastomeric Connectors
    Öppna denna publikation i ny flik eller fönster >>High-Speed Board-to-Board Interconnects utilizing Flexible Foils and Elastomeric Connectors
    2006 (Engelska)Ingår i: HDP'06. Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, IEEE , 2006, s. 157-160Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper presents a board-to-board interconnect technique utilizing elastomeric connectors and parallel microstrip lines on a flexible foil cable with low dielectric loss (tandelta = 0.002). It is shown that a pad structure combined with an elastomeric connector can be co-designed such that a good signal integrity and thus a high data transmission rate is achieved. It is also shown that 2 Gbps data transmission rate can be achieved with a 490-mm-long microstrip on the flexible cable, where crosstalk is taken into account. Utilizing the elastomeric connector together with the flat and flexible cable, dense parallel microstrips can easily be designed and processed since standard printed circuit board processing techniques can be utilized

    Ort, förlag, år, upplaga, sidor
    IEEE, 2006
    Nyckelord
    High-Speed Interconnects, Flexible cable, Elastomeric Connector
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-36189 (URN)10.1109/HDP.2006.1707585 (DOI)30446 (Lokalt ID)1-4244-0488-6 (ISBN)30446 (Arkivnummer)30446 (OAI)
    Konferens
    The 8th IEEE CPMT International Conference on High Density Microsystem Design, Packaging and Component Failure Analysis, June 27 – 28, Shanhai, China
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2018-03-20
    4. Single-ended to Mixed-Mode S-Parameter Conversion for Networks with Coupled Differential Signaling
    Öppna denna publikation i ny flik eller fönster >>Single-ended to Mixed-Mode S-Parameter Conversion for Networks with Coupled Differential Signaling
    2007 (Engelska)Ingår i: 36th European Microwave Conference, Munich: EUMC , 2007, s. 238-241Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    It is shown in this paper that the commonly used method for converting from standard single-ended to mixed- mode S-parameters for networks with differential signaling only works for odd- and even-mode impedance equal to 50Omega. A correct conversion matrix equation must include the odd- and even-mode impedances which are not equal to the unique characteristic impedance owing to signal coupling in the network.

    Ort, förlag, år, upplaga, sidor
    Munich: EUMC, 2007
    Nyckelord
    Mixed-Mode S-Parameter Conversion, Coupled Differential Signaling
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-40870 (URN)10.1109/EUMC.2007.4405170 (DOI)54438 (Lokalt ID)978-2-87487-001-9 (ISBN)54438 (Arkivnummer)54438 (OAI)
    Konferens
    36th European Microwave Conference, 10-15 September, Manchester, UK
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2013-12-19
  • 3.
    Huynh, Allan
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Sammanfattning av Skokloster Slott2008Rapport (Övrigt vetenskapligt)
  • 4. Beställ onlineKöp publikationen >>
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Study of Wired and Wireless Data Transmissions2010Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    The topic of this dissertation is divided into two parts where the first part presents high-speed data transmission on flexible cables and the second part presents a wireless remote monitoring and controlling system with wireless data transmission.

    The demand on high-speed data communications has pushed both the wired and wireless technologies to operate at higher and higher frequencies. Classic Kirchhoff’s voltage and current laws cannot be directly applied, when entering the microwave spectrum for frequency above 1 GHz. Instead, the transmission line theory should be used. Most of the wired communication products use bit-serial cables to connect devices. To transfer massive data at high speed, parallel data transfer techniques can be utilized and the speed can be increased by the number of parallel lines or cables, if the transfer rate per line or cable can be maintained. However, the lines or cables must be well-shielded so the crosstalk between them can be minimized.

    Differential lines can also be used to increase the data speed further compared to the single-ended lines, along with saving the power consumption and reducing the electromagnetic interference. However, characterization for differential lines is not as straight forward as for single-ended cases using standard S-parameters. Instead, mixed-mode S-parameters are needed to describe the differential-, common- and mixed-mode characteristics of the differential signal. Mixed-mode S-parameters were first introduced in 1995 and are now widely used. However, improvements of the theory can still be found to increase the accuracy of simulations and measurements, which is proposed and presented in this dissertation.

    The interest of wireless solution to do remote control and monitoring for cultural building has been increasing. Available solutions on the market are mostly wired and very expensive. The available wireless solutions often offer limited network size with point-to-point radio link. Furthermore, the wired solution requires operation on the building, which is not the preferred way since it will damage the historical values of cultural heritage buildings. Wireless solutions on the other hand can offer flexibility when deploying the network, i.e., operation on the building can be avoided or kept to the minimum.

    A platform for wireless remote monitoring and control has been established for various deployments at different cultural buildings. The platform has a modular design to ease future improvement and expansion of the system. The platform is based on the ZigBee standard, which is an open standard, specified with wireless sensor network as focus. Three different modules have been developed. The performance has been studied and optimized. The network has been deployed at five different locations in Sweden for data collection and verification of the system stability.

    The remote monitoring and control functions of the developed platform have received a nomination for the Swedish Embedded Award 2010 and been demonstrated at the Scandinavia Embedded Conference 2010 in Stockholm.Communication

    Delarbeten
    1. Study of high-speed data transfer utilizing flexible and parallel transmission lines
    Öppna denna publikation i ny flik eller fönster >>Study of high-speed data transfer utilizing flexible and parallel transmission lines
    2005 (Engelska)Ingår i: Procedings of International Microelectronics and Packaging Society Nordic,, Pelkosen Painotuote in Kiiminki, Finland , 2005, s. 230-234Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    Today many systems use serial data transfer techniques like serial AT attachment (SATA), Firewire and universal serial bus (USB). However, with parallel techniques the data transfer can be raised to a much higher speed. Having wires in parallel, one must also deal with phenomena such as crosstalk. To overcome crosstalk between parallel lines one must follow some design rules to avoid interference, like optimizing spaces between transmission lines. In this work simulations on high-speed single-ended and parallel channels utilizing microstrips and striplines have been done to show parameters that limit the channel bandwidth and thus the data rate. Design and simulations have been done using the Computer Aided Design (CAD) tool, Advanced Design System (ADS) provided by Agilent Technologies Inc. It is shown that both conductor surface roughness and dielectric loss will introduce extra AC noise to the signal. When having parallel conductors the AC noise increases with decreased rise/fall time, introduced by skin effect, conductor surface roughness and dielectric loss.

    Ort, förlag, år, upplaga, sidor
    Pelkosen Painotuote in Kiiminki, Finland, 2005
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-32317 (URN)18209 (Lokalt ID)18209 (Arkivnummer)18209 (OAI)
    Konferens
    Procedings of International Microelectronics and Packaging Society Nordic, September, Törnsberg, Norway
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2013-12-19
    2. High-speed parallel data transmission utilizing a flex-rigid concept
    Öppna denna publikation i ny flik eller fönster >>High-speed parallel data transmission utilizing a flex-rigid concept
    2005 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    Transmission lines utilizing microstrips on a flex-foil with low dielectric loss (tanδ = 0.002) have been simulated to compare with the transmission lines laminated with a rigid part, a so-called flex-rigid structure. At high speeds, even solders, pads and connectors affect the signal integrity because of their parasitic effects. The flex-rigid structure does not require these extra parts, resulting in good signal integrity and thus high data transfer rates. Another advantage with a flexible cable is that dense parallel microstrips can easily be designed. Although many wired data communications utilize serial techniques like Serial AT Attachment (SATA), Universal Serial Bus (USB) and Firewire, the serial data link has its limitations when very high data speeds are required. With a parallel data transmission technique, the data transfer rate can be raised to a very high speed. However, a parallel data transmission technique has some disadvantages such as crosstalk and skew between the signals which must be considered.

    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-32318 (URN)18210 (Lokalt ID)18210 (Arkivnummer)18210 (OAI)
    Konferens
    Gigahertz 2005, 8-9 September, Uppsala, Sweden
    Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2013-12-19
    3. High-Speed Board-to-Board Interconnects utilizing Flexible Foils and Elastomeric Connectors
    Öppna denna publikation i ny flik eller fönster >>High-Speed Board-to-Board Interconnects utilizing Flexible Foils and Elastomeric Connectors
    2006 (Engelska)Ingår i: HDP'06. Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, IEEE , 2006, s. 157-160Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    This paper presents a board-to-board interconnect technique utilizing elastomeric connectors and parallel microstrip lines on a flexible foil cable with low dielectric loss (tandelta = 0.002). It is shown that a pad structure combined with an elastomeric connector can be co-designed such that a good signal integrity and thus a high data transmission rate is achieved. It is also shown that 2 Gbps data transmission rate can be achieved with a 490-mm-long microstrip on the flexible cable, where crosstalk is taken into account. Utilizing the elastomeric connector together with the flat and flexible cable, dense parallel microstrips can easily be designed and processed since standard printed circuit board processing techniques can be utilized

    Ort, förlag, år, upplaga, sidor
    IEEE, 2006
    Nyckelord
    High-Speed Interconnects, Flexible cable, Elastomeric Connector
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-36189 (URN)10.1109/HDP.2006.1707585 (DOI)30446 (Lokalt ID)1-4244-0488-6 (ISBN)30446 (Arkivnummer)30446 (OAI)
    Konferens
    The 8th IEEE CPMT International Conference on High Density Microsystem Design, Packaging and Component Failure Analysis, June 27 – 28, Shanhai, China
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2018-03-20
    4. Single-ended to Mixed-Mode S-Parameter Conversion for Networks with Coupled Differential Signaling
    Öppna denna publikation i ny flik eller fönster >>Single-ended to Mixed-Mode S-Parameter Conversion for Networks with Coupled Differential Signaling
    2007 (Engelska)Ingår i: 36th European Microwave Conference, Munich: EUMC , 2007, s. 238-241Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    It is shown in this paper that the commonly used method for converting from standard single-ended to mixed- mode S-parameters for networks with differential signaling only works for odd- and even-mode impedance equal to 50Omega. A correct conversion matrix equation must include the odd- and even-mode impedances which are not equal to the unique characteristic impedance owing to signal coupling in the network.

    Ort, förlag, år, upplaga, sidor
    Munich: EUMC, 2007
    Nyckelord
    Mixed-Mode S-Parameter Conversion, Coupled Differential Signaling
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-40870 (URN)10.1109/EUMC.2007.4405170 (DOI)54438 (Lokalt ID)978-2-87487-001-9 (ISBN)54438 (Arkivnummer)54438 (OAI)
    Konferens
    36th European Microwave Conference, 10-15 September, Manchester, UK
    Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2013-12-19
    5. Truly Differential RF and Microwave Front-End Design
    Öppna denna publikation i ny flik eller fönster >>Truly Differential RF and Microwave Front-End Design
    Visa övriga...
    2010 (Engelska)Ingår i: IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON), Piscataway, NJ, USA: IEEE , 2010, s. 1-5Konferensbidrag, Publicerat paper (Refereegranskat)
    Abstract [en]

    New design methodology for truly differential RF and microwave front-ends has been presented in this paper. Baluns are avoided using this design methodology, while achieving differential signaling for high noise immunity. A case study on an ultra-wide band RF front-end in the frequency band 6-9 GHz has been performed using the new design methodology, indicating that both wide bandwidth and high performance can be achieved using this design methodology. A direct comparison between single-ended and differential designs of the RF filter has also been presented in order to verify the correctness of the design methodology.

    Ort, förlag, år, upplaga, sidor
    Piscataway, NJ, USA: IEEE, 2010
    Nyckelord
    Design methodology, Differential, Microwave, RF front-end
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61292 (URN)10.1109/WAMICON.2010.5461888 (DOI)978-1-4244-6688-7 (ISBN)
    Konferens
    IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON), 12-13 April 2010, Melbourne, Australia
    Tillgänglig från: 2010-11-10 Skapad: 2010-11-10 Senast uppdaterad: 2019-06-17Bibliografiskt granskad
    6. Wireless Remote Monitoring System for Cultural Heritage
    Öppna denna publikation i ny flik eller fönster >>Wireless Remote Monitoring System for Cultural Heritage
    2010 (Engelska)Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 118, nr 7, s. 1-12Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    Existing systems to collect temperature and relative humidity data at cultural heritage buildings require technical knowledge by people who are working with it, which is very seldom that they do have. The systems available today also require manual downloading of the collected data from the sensor to a computer for central storage and for further analysis. In this paper a wireless remote sensor network based on the ZigBee technology together with a simplified data collection system is presented. The system does not require any knowledge by the building administrator after the network is deployed. The wireless sensor device will automatically join available network when the user wants to expand the network. The collected data will be automatically and periodically synchronized to a remote main server via an Internet connection. The data can be used for centralized monitoring and other purpose. The power consumption of the sensor module is also minimized and the battery lifetime is estimated up to 10 years.

    Nyckelord
    ZigBee, Remote monitoring, Low cost, Low power, Long battery lifetime
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61216 (URN)
    Projekt
    CultureBee
    Tillgänglig från: 2010-11-05 Skapad: 2010-11-05 Senast uppdaterad: 2010-11-16
    7. Design of the Remote Climate Control System for Cultural Buildings Utilizing ZigBee Technology
    Öppna denna publikation i ny flik eller fönster >>Design of the Remote Climate Control System for Cultural Buildings Utilizing ZigBee Technology
    2010 (Engelska)Ingår i: Sensors & Transducers Journal, ISSN 2306-8515, E-ISSN 1726-5479, Vol. 118, nr 7, s. 13-27Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    A wireless solution of remote climate control for cultural buildings is presented in this paper. The system allows users to use web service to control climate in different cultural buildings, like churches. The wireless sensor networks deployed in churches receive the control commands and manage the indoor climate. The whole system is modularly designed, which makes possible an easy service extension, system reconfiguration and modification. This paper includes the system overview and the software design of each part within the system.

    Nyckelord
    ZigBee, Wireless sensor network, Remote control, Modular system design
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61293 (URN)
    Projekt
    CultureBee
    Tillgänglig från: 2010-11-10 Skapad: 2010-11-10 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
    8. ZigBee Radio with External Low-Noise Amplifier
    Öppna denna publikation i ny flik eller fönster >>ZigBee Radio with External Low-Noise Amplifier
    2010 (Engelska)Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 114, nr 3, s. 184-191Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This article presents the performance study of a ZigBee module with an external low-noiseamplifier, measured in both outdoor and indoor environments. Our previous study has already shownthat the indoor campus environment such as walls and floors would reduce the radio link rangedrastically and the packet error rate increased. In this study, an external low-noise amplifier has beenadded to a ZigBee module to increase the receiver sensitivity. It is shown that with an external lownoiseamplifier the outdoor radio range can reach up to 403 m with a negligible packet error ratecompared to 144 m without the low-noise amplifier for point-to-point connection. Thus, by increasingthe receiver sensitivity the radio range can be increased without increasing of the radio power outputso that the power consumption can still be kept low to obtain long battery lifetime.

    Nyckelord
    ZigBee, Low-noise Amplifier, Increase Radio Link Range, Low Power, Long Battery Lifetime
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61214 (URN)
    Projekt
    CultureBee
    Tillgänglig från: 2010-11-05 Skapad: 2010-11-05 Senast uppdaterad: 2010-12-07
    9. ZigBee Radio with External Power Amplifier and Low-Noise Amplifier
    Öppna denna publikation i ny flik eller fönster >>ZigBee Radio with External Power Amplifier and Low-Noise Amplifier
    2010 (Engelska)Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 118, nr 7, s. 110-121Artikel i tidskrift (Refereegranskat) Published
    Abstract [en]

    This paper presents the performance study of a ZigBee module with both an external power amplifier and a low-noise amplifier, measured in outdoor and indoor environments, respectively. Our previous study has already shown that the indoor campus environment such as walls and floors would reduce the radio link range drastically and the packet error rate increased. In this study, both an external power amplifier and a low-noise amplifier have been added to a ZigBee module to increase both the transmitter power and receiver sensitivity. It is shown that with an external power amplifier and a low-noise amplifier the outdoor radio range can reach up to 1600 m with a negligible packet error rate compared to 144 m without any external amplifier for point-to-point radio connection. Thus, by increasing both the transmitter power and receiver sensitivity the radio range can be increased significantly. The power consumption issue with the added amplifiers is studied as well, indicating that the module can still be battery driven with a battery lifetime of about 9 years at a normal sampling rate to the sensor.

    Nyckelord
    ZigBee, Power amplifier, Low-noise amplifier, Radio range
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61215 (URN)
    Projekt
    CultureBee
    Tillgänglig från: 2010-11-05 Skapad: 2010-11-05 Senast uppdaterad: 2010-11-16
    10. Reliability and Latency Enhancements in a ZigBee Remote Sensing System
    Öppna denna publikation i ny flik eller fönster >>Reliability and Latency Enhancements in a ZigBee Remote Sensing System
    2010 (Engelska)Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
    Abstract [en]

    Methods to improve the reliability and optimize the system latency of our own-developed ZigBee remote sensing system are introduced in this paper. The concept of this system utilizes the ZigBee network to transmit sensor information and process them at both local and remote databases. The enhancement has been done in different parts in this system. In the ZigBee network part, the network topology is configured and controlled. The latency for message transmitting is also optimized. In the data processing part, the network status check function and data buffer function are introduced to improve the system reliability. Additionally, the system latency is measured to compare with the Ad-hoc On Demand Distance Vector algorithm used in the ZigBee standard.

    Nyckelord
    System reliability, system latency, ZigBee network topology configuration, data buffering
    Nationell ämneskategori
    Teknik och teknologier
    Identifikatorer
    urn:nbn:se:liu:diva-61294 (URN)10.1109/SENSORCOMM.2010.38 (DOI)978-1-4244-7538-4 (ISBN)
    Konferens
    The Fourth International Conference on Sensor Technologies and Applications (SENSORCOMM 2010), July 18 - 25, Venice/Mestre, Italy
    Projekt
    CultureBee
    Tillgänglig från: 2010-11-10 Skapad: 2010-11-10 Senast uppdaterad: 2014-09-25Bibliografiskt granskad
    Ladda ner fulltext (pdf)
    Study of Wired and Wireless Data Transmissions
    Ladda ner (pdf)
    Cover
  • 5.
    Huynh, Allan
    et al.
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Gong, Shaofang
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    A Comparison Between Parallel Single-Ended Microstrips and Broadside-Coupled Coplanar-Waveguides2006Rapport (Övrigt vetenskapligt)
  • 6.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Odselius, Leif
    Micronic Laser System Inc., P.O Box 3141, SE-183 03 Täby, Sweden.
    High-Speed Board-to-Board Interconnects utilizing Flexible Foils and Elastomeric Connectors2006Ingår i: HDP'06. Conference on High Density Microsystem Design and Packaging and Component Failure Analysis, IEEE , 2006, s. 157-160Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a board-to-board interconnect technique utilizing elastomeric connectors and parallel microstrip lines on a flexible foil cable with low dielectric loss (tandelta = 0.002). It is shown that a pad structure combined with an elastomeric connector can be co-designed such that a good signal integrity and thus a high data transmission rate is achieved. It is also shown that 2 Gbps data transmission rate can be achieved with a 490-mm-long microstrip on the flexible cable, where crosstalk is taken into account. Utilizing the elastomeric connector together with the flat and flexible cable, dense parallel microstrips can easily be designed and processed since standard printed circuit board processing techniques can be utilized

  • 7.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Odselius, Leif
    Micronic Laser System Inc., P.O Box 3141, Nytorpsvägen 9, SE-183 03 Täby, Sweden.
    Study of high-speed data transfer utilizing flexible and parallel transmission lines2005Ingår i: Procedings of International Microelectronics and Packaging Society Nordic,, Pelkosen Painotuote in Kiiminki, Finland , 2005, s. 230-234Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Today many systems use serial data transfer techniques like serial AT attachment (SATA), Firewire and universal serial bus (USB). However, with parallel techniques the data transfer can be raised to a much higher speed. Having wires in parallel, one must also deal with phenomena such as crosstalk. To overcome crosstalk between parallel lines one must follow some design rules to avoid interference, like optimizing spaces between transmission lines. In this work simulations on high-speed single-ended and parallel channels utilizing microstrips and striplines have been done to show parameters that limit the channel bandwidth and thus the data rate. Design and simulations have been done using the Computer Aided Design (CAD) tool, Advanced Design System (ADS) provided by Agilent Technologies Inc. It is shown that both conductor surface roughness and dielectric loss will introduce extra AC noise to the signal. When having parallel conductors the AC noise increases with decreased rise/fall time, introduced by skin effect, conductor surface roughness and dielectric loss.

  • 8.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Single-ended to Mixed-Mode S-Parameter Conversion for Networks with Coupled Differential Signaling2007Ingår i: 36th European Microwave Conference, Munich: EUMC , 2007, s. 238-241Konferensbidrag (Refereegranskat)
    Abstract [en]

    It is shown in this paper that the commonly used method for converting from standard single-ended to mixed- mode S-parameters for networks with differential signaling only works for odd- and even-mode impedance equal to 50Omega. A correct conversion matrix equation must include the odd- and even-mode impedances which are not equal to the unique characteristic impedance owing to signal coupling in the network.

  • 9.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Odselius, Leif
    Micronic Laser System Inc., P.O Box 3141, SE-183 03 Täby, Sweden.
    High-speed parallel data transmission utilizing a flex-rigid concept2005Konferensbidrag (Refereegranskat)
    Abstract [en]

    Transmission lines utilizing microstrips on a flex-foil with low dielectric loss (tanδ = 0.002) have been simulated to compare with the transmission lines laminated with a rigid part, a so-called flex-rigid structure. At high speeds, even solders, pads and connectors affect the signal integrity because of their parasitic effects. The flex-rigid structure does not require these extra parts, resulting in good signal integrity and thus high data transfer rates. Another advantage with a flexible cable is that dense parallel microstrips can easily be designed. Although many wired data communications utilize serial techniques like Serial AT Attachment (SATA), Universal Serial Bus (USB) and Firewire, the serial data link has its limitations when very high data speeds are required. With a parallel data transmission technique, the data transfer rate can be raised to a very high speed. However, a parallel data transmission technique has some disadvantages such as crosstalk and skew between the signals which must be considered.

  • 10.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Karlsson, Magnus
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Mixed-Mode S-Parameters and Conversion Techniques2010Ingår i: Advanced Microwave Circuits and Systems / [ed] Vitaliy Zhurbenko, INTECH , 2010, s. 1-12Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    This book is based on recent research work conducted by the authors dealing with the design and development of active and passive microwave components, integrated circuits and systems. It is divided into seven parts. In the first part comprising the first two chapters, alternative concepts and equations for multiport network analysis and characterization are provided. A thru-only de-embedding technique for accurate on-wafer characterization is introduced. The second part of the book corresponds to the analysis and design of ultra-wideband low- noise amplifiers (LNA).

  • 11.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Zhang, Jingcheng
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Wireless Remote Monitoring System for Cultural Heritage2010Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 118, nr 7, s. 1-12Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Existing systems to collect temperature and relative humidity data at cultural heritage buildings require technical knowledge by people who are working with it, which is very seldom that they do have. The systems available today also require manual downloading of the collected data from the sensor to a computer for central storage and for further analysis. In this paper a wireless remote sensor network based on the ZigBee technology together with a simplified data collection system is presented. The system does not require any knowledge by the building administrator after the network is deployed. The wireless sensor device will automatically join available network when the user wants to expand the network. The collected data will be automatically and periodically synchronized to a remote main server via an Internet connection. The data can be used for centralized monitoring and other purpose. The power consumption of the sensor module is also minimized and the battery lifetime is estimated up to 10 years.

  • 12.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Zhang, Jingcheng
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    ZigBee Radio with External Low-Noise Amplifier2010Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 114, nr 3, s. 184-191Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This article presents the performance study of a ZigBee module with an external low-noiseamplifier, measured in both outdoor and indoor environments. Our previous study has already shownthat the indoor campus environment such as walls and floors would reduce the radio link rangedrastically and the packet error rate increased. In this study, an external low-noise amplifier has beenadded to a ZigBee module to increase the receiver sensitivity. It is shown that with an external lownoiseamplifier the outdoor radio range can reach up to 403 m with a negligible packet error ratecompared to 144 m without the low-noise amplifier for point-to-point connection. Thus, by increasingthe receiver sensitivity the radio range can be increased without increasing of the radio power outputso that the power consumption can still be kept low to obtain long battery lifetime.

  • 13.
    Huynh, Allan
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Zhang, Jingcheng
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    ZigBee Radio with External Power Amplifier and Low-Noise Amplifier2010Ingår i: Sensors & Transducers Journal, ISSN 1726-5479, Vol. 118, nr 7, s. 110-121Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents the performance study of a ZigBee module with both an external power amplifier and a low-noise amplifier, measured in outdoor and indoor environments, respectively. Our previous study has already shown that the indoor campus environment such as walls and floors would reduce the radio link range drastically and the packet error rate increased. In this study, both an external power amplifier and a low-noise amplifier have been added to a ZigBee module to increase both the transmitter power and receiver sensitivity. It is shown that with an external power amplifier and a low-noise amplifier the outdoor radio range can reach up to 1600 m with a negligible packet error rate compared to 144 m without any external amplifier for point-to-point radio connection. Thus, by increasing both the transmitter power and receiver sensitivity the radio range can be increased significantly. The power consumption issue with the added amplifiers is studied as well, indicating that the module can still be battery driven with a battery lifetime of about 9 years at a normal sampling rate to the sensor.

  • 14.
    Håkansson, Pär
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Gong, Shaofang
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    A new concept of wireless data transmission of extremely high data rate over 10 Gbps2005Rapport (Övrigt vetenskapligt)
  • 15.
    Håkansson, Pär
    et al.
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Huynh, Allan
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Gong, Shaofang
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    A Study of Wireless Parallel Data Transmission of Extremely High Data Rate up to 6.17 Gbps per Channel2006Ingår i: Asia Pacific Microwave Conference,2006, Tokyo: Institute of Electronics, Information and Communication Engineers , 2006, s. 975-Konferensbidrag (Refereegranskat)
  • 16.
    Håkansson, Pär
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Gong, Shaofang
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för teknik och naturvetenskap.
    Wireless data transmission2005Patent (Övrig (populärvetenskap, debatt, mm))
  • 17.
    Karlsson, Magnus
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Parallel channels using frequency multiplexing techniques2010Ingår i: Ultra Wideband / [ed] Boris Lembrikov, SCIYO , 2010, s. 35-54Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    Ultra wideband technology is one of the most promising directions in the rapidly developing modern communications. Ultra wideband communication system applications include radars, wireless personal area networks, sensor networks, imaging systems and high precision positioning systems. Ultra wideband transmission is characterized by high data rate, availability of low-cost transceivers, low transmit power and low interference. The proposed book consisting of 19 chapters presents both the state-of-the-art and the latest achievements in ultra wideband communication system performance, design and components. The book is addressed to engineers and researchers who are interested in the wide range of topics related to ultra wideband communications.

  • 18.
    Karlsson, Magnus
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan.
    Frequency-multiplexed Inverted-F Antennas for Multi-band UWB2006Ingår i: IEEE Annual Wireless and Microwave Technology Conference WAMICON '06, 2006, s. FF-2-1--FF-2-3Konferensbidrag (Refereegranskat)
    Abstract [en]

    An invented frequency multiplexing technique is used to combine inverted-F antennas for multi-band UWB. The frequency multiplexing technique allows a number of independent antennas to be used in parallel. In this paper a radio front-end system consisting of three antennas and a frequency multiplexing network is built. Using one antenna for each sub-band within a band-group provides equal performance for the entire band. Both the antennas and the frequency multiplexing network can be integrated on a printed circuit board. The antennas were simulated and measured. S-parameters of the antennas were extracted and used for co-simulation with the frequency multiplexing network. The antenna system fulfills the requirement for Mode 1 UWB.

  • 19.
    Wang, Duxiang
    et al.
    Nanjing Electronic Equipment Institute.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Li, Ming
    Nanjing Electronic Equipment Institute.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Study of Wideband Microstrip 90º 3-dB Two-Branch Coupler with Minimum Amplitude and Phase Imbalance2008Konferensbidrag (Refereegranskat)
    Abstract [en]

    The properties, especially the phase properties, of a wideband microstrip coupler with very flat coupling are simulated, measured and analyzed. Then a modified wideband microstrip 90deg 3-dB two-branch coupler with flat amplitude response, low insertion loss, small amplitude imbalance and phase imbalance is proposed. This wideband coupler can be used to design wideband correlators. By tuning and optimizing the matching network at each output of a normal two-branch coupler according to both magnitude and phase properties, the relative bandwidth of this modified coupler with the minimum amplitude and phase imbalance can reach 50%, with frequency range of 3-5 GHz.

  • 20.
    Wang, Duxiang
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap. Linköpings universitet, Tekniska högskolan. Nanjing Electronic Equipment Institute, Nanjing, Jiangsu, P.R.China.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Håkansson, Pär
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Li, Ming
    Nanjing Electronic Equipment Institute, Nanjing, Jiangsu, P.R.China.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Study of Wideband Microstrip Correlators for Ultra-wideband Communication Systems2007Ingår i: Proceedings of Asia-Pacific Microwave Conference, 2007. APMC 2007., Piscataway, NJ, USA: IEEE , 2007, s. 2089-Konferensbidrag (Refereegranskat)
    Abstract [en]

    A new wideband microstrip correlator, which acts as the key component of six-port circuits for ultra-wideband (UWB) systems, is presented. This new correlator, with 40% relative bandwidth, is proposed at the frequency range of 3.1-4.8 GHz of UWB. This correlator utilizes three unique wideband 90deg 3-dB two-branch couplers and one 0deg 3-dB Wilkinson power divider to reach the required bandwidth. This correlator is designed using microstrips for the sake of low cost, simple design, and easy to implement and test. The insertion loss, amplitude imbalance and phase imbalance between ports are given. The results from measurements and simulations are compared, and methods to further improve this new correlator are discussed.

  • 21.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huss, Patrik
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    A Web-based Remote Indoor Climate Control System Based on Wireless Sensor Network2013Ingår i: International Journal of Sensors and Sensor Networks, ISSN 2329-1796, Vol. 1, nr 3, s. 32-40Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents the design and implementation of a web-based wireless indoor climate control system. The user interface of the system is implemented as a web service. People can login to the website and remotely control the indoor climate of different locations. A wireless sensor network is deployed in each location to execute control commands. A gateway is implemented to synchronize the information between the wireless sensor network and the web service. The gateway software also includes scheduling function and different control algorithms to improve the control result. Additionally, the system security and availability are highly considered in this system. The gateway software implements a warning function which sends warning messages when emergency happens. Finally, the whole wireless control system architecture is modularly designed. It is easy to add different control applications or different control algorithms into the system.

  • 22.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    A Communication Reliability Enhancement Framework for Wireless Sensor Network Using the ZigBee Protocol2011Ingår i: Sensors & Transducers Journal, ISSN 2306-8515, E-ISSN 1726-5479, Vol. 135, nr 12, s. 42-56Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents the methods for the ZigBee network reliability enhancement and the battery life time optimization. The paper begins with the introduction of the common communication problems due to the broken links between sensor module and message relay, or between different relays. Extra message hand shake mechanisms are added to solve different problem mentioned at the beginning. Finally, a general purpose reliability enhancement component is developed as a state machine which can be work together with ZigBee protocol to enhance ZigBee network communication reliability. Moreover, the battery life time of the sensor module during link broken is considerably increased after the enhancement.

  • 23.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    A Fully Wireless Monitoring and Control System for Protecting Cultural Heritage2011Ingår i: Proceedings of 2011 20th IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises WETICE 2011, IEEE , 2011, s. 250-255Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents a component based wireless monitoring and control system. The system is introduced from both the system architecture and function point of view. The paper begins with the introduction of the component design and the communication interaction between them. The system is composed by three components, the wireless sensor network, the local server and the main server. Wireless sensor networks are deployed in different locations for remote monitoring and control purpose. The monitoring results and control commands are synchronized between the main server and wireless sensor networks via local servers. The test results of the battery life time calculation and remote monitoring field test results are presented in the end of the paper.

  • 24.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Design of the Remote Climate Control System for Cultural Buildings Utilizing ZigBee Technology2010Ingår i: Sensors & Transducers Journal, ISSN 2306-8515, E-ISSN 1726-5479, Vol. 118, nr 7, s. 13-27Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A wireless solution of remote climate control for cultural buildings is presented in this paper. The system allows users to use web service to control climate in different cultural buildings, like churches. The wireless sensor networks deployed in churches receive the control commands and manage the indoor climate. The whole system is modularly designed, which makes possible an easy service extension, system reconfiguration and modification. This paper includes the system overview and the software design of each part within the system.

  • 25.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Reliability and Latency Enhancements in a ZigBee Remote Sensing System2010Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Methods to improve the reliability and optimize the system latency of our own-developed ZigBee remote sensing system are introduced in this paper. The concept of this system utilizes the ZigBee network to transmit sensor information and process them at both local and remote databases. The enhancement has been done in different parts in this system. In the ZigBee network part, the network topology is configured and controlled. The latency for message transmitting is also optimized. In the data processing part, the network status check function and data buffer function are introduced to improve the system reliability. Additionally, the system latency is measured to compare with the Ad-hoc On Demand Distance Vector algorithm used in the ZigBee standard.

  • 26.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-Zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Remote Sensing System for Cultural Buildings Utilizing ZigBee Technology2010Konferensbidrag (Refereegranskat)
    Abstract [en]

    A wireless remote sensing system using the ZigBee standard ispresented in this paper. This system is a wireless solution formonitoring purpose in cultural buildings in order to protectcultural heritage. The concept of this system utilizes ZigBeenetworks to carry and transmit data collected by sensors andstore them into both local and remote databases. Thus, users canmonitor the measured data locally or remotely. Especially, thepower consumption is optimized to extend the lifetime of thebattery-driven devices. Moreover, since the system has amodular architecture, it is easy to add extra services into thissystem.

  • 27.
    Zhang, Jingcheng
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Ye, Qin-zhong
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Huynh, Allan
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Gong, Shaofang
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Fysik och elektroteknik. Linköpings universitet, Tekniska högskolan.
    Design and Implementation of a Truly Battery-Driven ZigBee Wireless Sensor Network2013Manuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    As defined by the ZigBee standard, a router should be mains-powered in order to maintain the mesh feature of the ZigBee network. This study presents a method which allows the ZigBee router goes into sleep mode periodically and keeps the same mesh feature during the ZigBee communications. In this study, the standard ZigBee communication is separated into two synchronized clusters. The first cluster includes the communication between end devices and the associated router. The sensor message report time of different end devices are scheduled by the router in different collision-free time slots within a predefined time interval. The second cluster includes the mesh communication between routers and the concentrator. All routers are synchronized so that they wake up at the same time to maintain the mesh feature. In order to maximize the router battery lifetime, algorithms are developed so that the concentrator communicates with routers according to the network routing records. Additionally, in order to recover the broken communication, special logics are implemented in routers and end device so that they can rejoin the wireless sensor network with low power consumption. Finally, a battery lifetime model is presented which can be utilized to calculate battery lifetime of the ZigBee router under different network configurations.

1 - 27 av 27
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