University of Aveiro

Displaying 1-11 of 11 results

  • White Papers // May 2012

    Cross-Layer Design for Green Power Control

    In this paper, the authors propose a new energy efficiency metric which allows one to optimize the performance of a wireless system through a novel power control mechanism. The proposed metric possesses two important features. First, it considers the whole power of the terminal and not just the radiated power....

    Provided By University of Aveiro

  • White Papers // Jul 2011

    RelaySpot: A Framework for Opportunistic Cooperative Relaying

    Advances in wireless technologies, including more powerful devices and low cost radio technologies, have potential to drive a ubiquitous utilization of Internet services. Nevertheless wireless technologies face performance limitations due to unstable wireless conditions and mobility of devices. In face of multi-path propagation and low data rate stations, cooperative relaying...

    Provided By University of Aveiro

  • White Papers // Mar 2011

    Unsupervised Local Color Correction for Coarsely Registered Images

    The current paper proposes a new parametric local color correction technique. Initially, several color transfer functions are computed from the output of the mean shift color segmentation algorithm. Secondly, color influence maps are calculated. Finally, the contribution of every color transfer function is merged using the weights from the color...

    Provided By University of Aveiro

  • White Papers // Feb 2011

    Context-Based Wireless Mesh Networks: A Case for Network Virtualization

    Wireless Mesh Networks (WMNs) have gained increasing attention as an attractive means to provide connectivity in complement to access as offered by regular Internet Service Providers (ISPs). Such a grass-root technique, however, often suffers from detrimental operating conditions and poor quality. Network virtualization, on the other hand has been widely...

    Provided By University of Aveiro

  • White Papers // Sep 2010

    Generalized Analysis of a Distributed Energy Efficient Algorithm for Change Detection

    The authors propose an energy efficient distributed cooperative Change Detection scheme called DualCUSUM based on Page's CUSUM algorithm. In the algorithm, each sensor runs a CUSUM and transmits only when the CUSUM is above some threshold. The transmissions from the sensors are fused at the physical layer. The channel is...

    Provided By University of Aveiro

  • White Papers // Jul 2010

    Field Performance Measurements of a Gbps FSO Link at Covilha City, Portugal

    Wireless communications have been increasingly important. Besides Wi-Fi, FSO plays a very relevant technological role in this context. Performance is essential, resulting in more reliable and efficient communications. A 1.14 km FSO medium range link has been successfully implemented for high requirement applications at Gbps. An experimental performance evaluation of...

    Provided By University of Aveiro

  • White Papers // Aug 2009

    WiMAX for Emergency Services: An Empirical Evaluation

    WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed and mobile terminals, is very promising for Next Generation Networks. Emergency Services can also strongly benefit from WiMAX features, allowing the exploitation of novel application scenarios and business models. This paper presents a set of scenarios, such...

    Provided By University of Aveiro

  • White Papers // Mar 2009

    Study of Material Interference in a RFID Tag Reading

    Radio-Frequency Identification (RFID) is an automatic identification method that uses radio signals, relying on storing and remotely retrieving data using RFID tags or transponders. RFID technology is becoming more and more popular and a central part of one's daily lives. Nowadays, one uses RFID tags for every kind of activities,...

    Provided By University of Aveiro

  • White Papers // Mar 2009

    Remotely Reconfigurable Remote Node for Hybrid Ring-Tree Passive Optical Networks

    Passive Optical Networks (PONs) are becoming consistent alternatives to offer access solutions in a Fiber-To-The-Home (FTTH) environment. Flexibility, scalability, resiliency, higher user density and bandwidth, robustness and extended reach are important features for the next generation PONs (NG-PONs), while maintaining simplicity to make the network economically practicable. Scalable Advanced Ring-based...

    Provided By University of Aveiro

  • White Papers // Jan 2009

    FTT-Ethernet: A Platform to Implement the Elastic Task Model Over Message Streams

    Real-time distributed systems are becoming more pervasive, supporting a broad range of applications such as automotive, adaptive control, robotics, computer vision, and multimedia. Furthermore, in all such applications there is a growing demand for flexibility in order to support dynamic configuration changes such as those arising from evolving requirements and...

    Provided By University of Aveiro

  • White Papers // Oct 2008

    New Optimization Methods in Data Mining

    Data mining is a modern area of science dealing with the learning from given data in order to make predictions and estimations. Applications of Data mining can be found in various areas of academical and non academical life. This paper introduces new contributions by continuous optimization as a key technology...

    Provided By University of Aveiro

  • White Papers // Sep 2010

    Generalized Analysis of a Distributed Energy Efficient Algorithm for Change Detection

    The authors propose an energy efficient distributed cooperative Change Detection scheme called DualCUSUM based on Page's CUSUM algorithm. In the algorithm, each sensor runs a CUSUM and transmits only when the CUSUM is above some threshold. The transmissions from the sensors are fused at the physical layer. The channel is...

    Provided By University of Aveiro

  • White Papers // Jan 2009

    FTT-Ethernet: A Platform to Implement the Elastic Task Model Over Message Streams

    Real-time distributed systems are becoming more pervasive, supporting a broad range of applications such as automotive, adaptive control, robotics, computer vision, and multimedia. Furthermore, in all such applications there is a growing demand for flexibility in order to support dynamic configuration changes such as those arising from evolving requirements and...

    Provided By University of Aveiro

  • White Papers // Oct 2008

    New Optimization Methods in Data Mining

    Data mining is a modern area of science dealing with the learning from given data in order to make predictions and estimations. Applications of Data mining can be found in various areas of academical and non academical life. This paper introduces new contributions by continuous optimization as a key technology...

    Provided By University of Aveiro

  • White Papers // Mar 2009

    Study of Material Interference in a RFID Tag Reading

    Radio-Frequency Identification (RFID) is an automatic identification method that uses radio signals, relying on storing and remotely retrieving data using RFID tags or transponders. RFID technology is becoming more and more popular and a central part of one's daily lives. Nowadays, one uses RFID tags for every kind of activities,...

    Provided By University of Aveiro

  • White Papers // Mar 2009

    Remotely Reconfigurable Remote Node for Hybrid Ring-Tree Passive Optical Networks

    Passive Optical Networks (PONs) are becoming consistent alternatives to offer access solutions in a Fiber-To-The-Home (FTTH) environment. Flexibility, scalability, resiliency, higher user density and bandwidth, robustness and extended reach are important features for the next generation PONs (NG-PONs), while maintaining simplicity to make the network economically practicable. Scalable Advanced Ring-based...

    Provided By University of Aveiro

  • White Papers // Jul 2010

    Field Performance Measurements of a Gbps FSO Link at Covilha City, Portugal

    Wireless communications have been increasingly important. Besides Wi-Fi, FSO plays a very relevant technological role in this context. Performance is essential, resulting in more reliable and efficient communications. A 1.14 km FSO medium range link has been successfully implemented for high requirement applications at Gbps. An experimental performance evaluation of...

    Provided By University of Aveiro

  • White Papers // Mar 2011

    Unsupervised Local Color Correction for Coarsely Registered Images

    The current paper proposes a new parametric local color correction technique. Initially, several color transfer functions are computed from the output of the mean shift color segmentation algorithm. Secondly, color influence maps are calculated. Finally, the contribution of every color transfer function is merged using the weights from the color...

    Provided By University of Aveiro

  • White Papers // Jul 2011

    RelaySpot: A Framework for Opportunistic Cooperative Relaying

    Advances in wireless technologies, including more powerful devices and low cost radio technologies, have potential to drive a ubiquitous utilization of Internet services. Nevertheless wireless technologies face performance limitations due to unstable wireless conditions and mobility of devices. In face of multi-path propagation and low data rate stations, cooperative relaying...

    Provided By University of Aveiro

  • White Papers // Feb 2011

    Context-Based Wireless Mesh Networks: A Case for Network Virtualization

    Wireless Mesh Networks (WMNs) have gained increasing attention as an attractive means to provide connectivity in complement to access as offered by regular Internet Service Providers (ISPs). Such a grass-root technique, however, often suffers from detrimental operating conditions and poor quality. Network virtualization, on the other hand has been widely...

    Provided By University of Aveiro

  • White Papers // Aug 2009

    WiMAX for Emergency Services: An Empirical Evaluation

    WiMAX, as a Broadband Wireless Access technology for Metropolitan Area Networks, supporting fixed and mobile terminals, is very promising for Next Generation Networks. Emergency Services can also strongly benefit from WiMAX features, allowing the exploitation of novel application scenarios and business models. This paper presents a set of scenarios, such...

    Provided By University of Aveiro

  • White Papers // May 2012

    Cross-Layer Design for Green Power Control

    In this paper, the authors propose a new energy efficiency metric which allows one to optimize the performance of a wireless system through a novel power control mechanism. The proposed metric possesses two important features. First, it considers the whole power of the terminal and not just the radiated power....

    Provided By University of Aveiro