King Abdullah University of Science and Technology

Displaying 1-10 of 10 results

  • White Papers // May 2013

    Joint Opportunistic Scheduling and Network Coding for Bidirectional Relay Channel

    In this paper, the authors consider a two-way communication system in which two users communicate with each other through an intermediate relay over block-fading channels. They investigate the optimal opportunistic scheduling scheme in order to maximize the long-term average transmission rate in the system assuming symmetric information flow between the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // May 2013

    Exact Symbol Error Probability of Square M-QAM Signaling Over Generalized Fading Channels Subject to Additive Generalized Gaussian Noise

    This paper considers the average symbol error probability of square Quadrature Amplitude Modulation (QAM) coherent signaling over flat fading channels subject to additive generalized Gaussian noise. More specifically, a generic closed-form expression in terms of the Fox H function and the bivariate Fox H function is offered for the extended...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Feb 2013

    Energy Efficient Wireless Vehicular-Guided Actuator Network

    In this paper, the authors present an energy-efficient vehicular guided system for environmental disaster management using wireless sensor/actuator networks. Sensor nodes within clusters are controlled by a master node that is dynamically selected. Actuators support mobility for every sensor node in the area of interest. The system maintains energy efficiency...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Jan 2013

    Noisy Mean Eld Game Model for Malware Propagation in Opportunistic Networks

    In this paper, the authors present analytical mean field techniques that can be used to better understand the behavior of malware propagation in opportunistic large networks. They develop a modeling methodology based on stochastic mean field optimal control that is able to capture many aspects of the problem, especially the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Dec 2012

    Video Quality Prediction Over Wireless 4G

    In this paper, the authors study the problem of video quality prediction over the wireless 4G network. Video transmission data is collected from a real 4G SCM test-bed for investigating factors that affect video quality. After feature transformation and selection on video and network parameters, video quality is predicted by...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Sep 2012

    Efficient Power Allocation for Video Over Superposition Coding

    In this paper, the authors consider a wireless multimedia system by mapping Scalable Video Coded (SVC) bit-stream upon Super-Position Coded (SPC) signals, referred to as (SVC-SPC) architecture. Empirical experiments using a Software-Defined Radio (SDR) emulator are conducted to gain a better understanding of its efficiency, specifically, the impact of the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Sep 2012

    Empirical Evaluation of Superposition Coded Multicasting for Scalable Video

    In this paper, the authors investigate cross-layer Superposition Coded Multicast (SCM). Previous studies have proven its effectiveness in exploiting better channel capacity and service granularities via both analytical and simulation approaches. However, it has never been practically implemented using a commercial 4G system. This paper demonstrates their prototype in achieving...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Jul 2012

    Structure-Based Bayesian Sparse Reconstruction

    Sparse signal reconstruction algorithms have attracted research attention due to their wide applications in various fields. In this paper, the authors present a simple Bayesian approach that utilizes the sparsity constraint and a priori statistical information (Gaussian or otherwise) to obtain near optimal estimates. In addition, they make use of...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Apr 2011

    A Compact QPSK Modulator with Low Amplitude and Phase Imbalance for Remote Sensing Applications

    A new, compact and wide-band Quadrature Phase Shift Keying (QPSK) modulator is presented for remote sensing applications. The micro-strip-based modulator employs quadrature hybrid coupler, Wilkinson divider, rat race coupler and GaAs MESFET switches. It is designed to be part of an X band remote sensing transmitter with a center frequency...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Mar 2010

    Local and Global Recoding Methods for Anonymizing Set-valued Data

    In this paper, the authors study the problem of protecting privacy in the publication of set-valued data. Consider a collection of supermarket transactions that contains detailed information about items bought together by individuals. Even after removing all personal characteristics of the buyer, which can serve as links to user's identity,...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Dec 2012

    Video Quality Prediction Over Wireless 4G

    In this paper, the authors study the problem of video quality prediction over the wireless 4G network. Video transmission data is collected from a real 4G SCM test-bed for investigating factors that affect video quality. After feature transformation and selection on video and network parameters, video quality is predicted by...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Sep 2012

    Efficient Power Allocation for Video Over Superposition Coding

    In this paper, the authors consider a wireless multimedia system by mapping Scalable Video Coded (SVC) bit-stream upon Super-Position Coded (SPC) signals, referred to as (SVC-SPC) architecture. Empirical experiments using a Software-Defined Radio (SDR) emulator are conducted to gain a better understanding of its efficiency, specifically, the impact of the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Sep 2012

    Empirical Evaluation of Superposition Coded Multicasting for Scalable Video

    In this paper, the authors investigate cross-layer Superposition Coded Multicast (SCM). Previous studies have proven its effectiveness in exploiting better channel capacity and service granularities via both analytical and simulation approaches. However, it has never been practically implemented using a commercial 4G system. This paper demonstrates their prototype in achieving...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Jan 2013

    Noisy Mean Eld Game Model for Malware Propagation in Opportunistic Networks

    In this paper, the authors present analytical mean field techniques that can be used to better understand the behavior of malware propagation in opportunistic large networks. They develop a modeling methodology based on stochastic mean field optimal control that is able to capture many aspects of the problem, especially the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Feb 2013

    Energy Efficient Wireless Vehicular-Guided Actuator Network

    In this paper, the authors present an energy-efficient vehicular guided system for environmental disaster management using wireless sensor/actuator networks. Sensor nodes within clusters are controlled by a master node that is dynamically selected. Actuators support mobility for every sensor node in the area of interest. The system maintains energy efficiency...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Mar 2010

    Local and Global Recoding Methods for Anonymizing Set-valued Data

    In this paper, the authors study the problem of protecting privacy in the publication of set-valued data. Consider a collection of supermarket transactions that contains detailed information about items bought together by individuals. Even after removing all personal characteristics of the buyer, which can serve as links to user's identity,...

    Provided By King Abdullah University of Science and Technology

  • White Papers // May 2013

    Joint Opportunistic Scheduling and Network Coding for Bidirectional Relay Channel

    In this paper, the authors consider a two-way communication system in which two users communicate with each other through an intermediate relay over block-fading channels. They investigate the optimal opportunistic scheduling scheme in order to maximize the long-term average transmission rate in the system assuming symmetric information flow between the...

    Provided By King Abdullah University of Science and Technology

  • White Papers // May 2013

    Exact Symbol Error Probability of Square M-QAM Signaling Over Generalized Fading Channels Subject to Additive Generalized Gaussian Noise

    This paper considers the average symbol error probability of square Quadrature Amplitude Modulation (QAM) coherent signaling over flat fading channels subject to additive generalized Gaussian noise. More specifically, a generic closed-form expression in terms of the Fox H function and the bivariate Fox H function is offered for the extended...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Jul 2012

    Structure-Based Bayesian Sparse Reconstruction

    Sparse signal reconstruction algorithms have attracted research attention due to their wide applications in various fields. In this paper, the authors present a simple Bayesian approach that utilizes the sparsity constraint and a priori statistical information (Gaussian or otherwise) to obtain near optimal estimates. In addition, they make use of...

    Provided By King Abdullah University of Science and Technology

  • White Papers // Apr 2011

    A Compact QPSK Modulator with Low Amplitude and Phase Imbalance for Remote Sensing Applications

    A new, compact and wide-band Quadrature Phase Shift Keying (QPSK) modulator is presented for remote sensing applications. The micro-strip-based modulator employs quadrature hybrid coupler, Wilkinson divider, rat race coupler and GaAs MESFET switches. It is designed to be part of an X band remote sensing transmitter with a center frequency...

    Provided By King Abdullah University of Science and Technology