Now showing items 1-20 of 45

  • Subjective Quality Assessment of the Impact of Buffer Size in Fine-Grain Parallel Video Encoding 

    Montero, P.; Polak, L.; Taibo, J.; Kratochvil, T. (Společnost pro radioelektronické inženýrství, 2012-12)
    Fine-Grain parallelism is essential for real-time video encoding performance. This usually implies setting a fixed buffer size for each encoded block. The choice of this parameter is critical for both performance and ...
  • Current-Mode Universal Filters Employing Single FDCCII 

    Kacar, F.; Yesil, A.; Kuntman, H. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this study, to realize current-mode multifunction filters, three new circuit configurations are presented. The circuits include fully differential current conveyor (FDCCII) and four passive components. First proposed ...
  • Graph Cuts based Image Segmentation using Fuzzy Rule Based System 

    Khokher, M. R.; Ghafoor, A.; Siddiqui, A. M. (Společnost pro radioelektronické inženýrství, 2012-12)
    This work deals with the segmentation of gray scale, color and texture images using graph cuts. From input image, a graph is constructed using intensity, color and texture profiles of the image simultaneously. Based on the ...
  • Large-Signal Simulation of 94 GHz Pulsed Silicon DDR IMPATTs Including the Temperature Transient Effect 

    Acharyya, A.; Banerjee, S.; Banerjee, J. P. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this paper large-signal modeling and simulation has been carried to study the frequency chirping due to temperature transients and the large-signal power and efficiency of pulsed silicon Double-Drift Region (DDR) Impact ...
  • Modified Level Restorers Using Current Sink and Current Source Inverter Structures for BBL-PT Full Adder 

    Tirumalasetty, V. R.; Avireni, S. (Společnost pro radioelektronické inženýrství, 2012-12)
    Full adder is an essential component for the design and development of all types of processors like digital signal processors (DSP), microprocessors etc. In most of these systems adder lies in the critical path that affects ...
  • Evolutionary Synthesis of Fractional Capacitor Using Simulated Annealing Method 

    Slezak, J.; Gotthans, T.; Drinovsky, J. (Společnost pro radioelektronické inženýrství, 2012-12)
    Synthesis of fractional capacitor using classical analog circuit synthesis method was described in [6]. The work presented in this paper is focused on synthesis of the same problem by means of evolutionary method simulated ...
  • A Non-blind Color Image Watermarking Scheme Resistent Against Geometric Attacks 

    Ghafoor, A.; Imran, M. (Společnost pro radioelektronické inženýrství, 2012-12)
    A non-blind color image watermarking scheme using principle component analysis, discrete wavelet transform and singular value decomposition is proposed. The color components are uncorrelated using principle component ...
  • Tunable Versatile High Input Impedance Voltage-Mode Universal Biquadratic Filter Based on DDCCs 

    Jiun-Wei Horng; To-Yao Chiu; Zih-Yang Jhao (Společnost pro radioelektronické inženýrství, 2012-12)
    A high input impedance voltage-mode universal biquadratic filter with three input terminals and seven output terminals is presented. The proposed circuit uses three differential difference current conveyors (DDCCs), four ...
  • Radiation Characteristics of Tunable Graphennas in the Terahertz Band 

    Llatser, I.; Kremers, C.; Chigrin, D. N.; Jornet, J. M.; Lemme, M. C.; Cabellos-Aparicio, A.; Alarcon, E. (Společnost pro radioelektronické inženýrství, 2012-12)
    Graphene-enabled wireless communications constitute a novel paradigm which has been proposed to implement wireless communications among nanosystems. Indeed, graphene-based plasmonic nano-antennas, or graphennas, just a few ...
  • Indoor Wireless RF Energy Transfer for Powering Wireless Sensors 

    Visser, H. (Společnost pro radioelektronické inženýrství, 2012-12)
    For powering wireless sensors in buildings, rechargeable batteries may be used. These batteries will be recharged remotely by dedicated RF sources. Far-field RF energy transport is known to suffer from path loss and therefore ...
  • A Novel Method for Radio Propagation Simulation Based on Automatic 3D Environment Reconstruction 

    He, D.; Liang, G.; Portilla, J.; Riesgo, T. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this paper, a novel method to simulate radio propagation is presented. The method consists of two steps: automatic 3D scenario reconstruction and propagation modeling. For 3D reconstruction, a machine learning algorithm ...
  • Antenna Design Concepts Based on Transformation Electromagnetics Approach 

    Tichit, P.-H.; Burokur, S. N.; de Lustrac, A. (Společnost pro radioelektronické inženýrství, 2012-12)
    Using the idea of wave manipulation via coordinate transformation, we demonstrate the design of novel antenna concepts. The manipulation is enabled by composite metamaterials that realize the space coordinate transformation. ...
  • Single-band and Dual-band Artificial Magnetic Conductor Ground Planes for Multi-band Dipole Antenna 

    Abu, M.; Rahim, M. K. A. (Společnost pro radioelektronické inženýrství, 2012-12)
    Two new designs of high impedance surface (HIS) structure are presented, namely zigzag and slotted rectangular with I-shaped slot Artificial Magnetic Conductor (AMC). The zigzag AMC is designed based on the straight dipole ...
  • Characterization of 60 GHz Shadowing by Human Bodies and Simple Phantoms 

    Gustafson, C.; Tufvesson, F. (Společnost pro radioelektronické inženýrství, 2012-12)
    The 60 GHz band is very prominsing for high data rate (>1 Gb/s) wireless systems operating at short ranges. However, due to the short wavelengths in this frequency band, the shadowing effects cuased by human bodies and ...
  • A Hybrid Optimization Algorithm for Low RCS Antenna Design 

    Shao, W.; Zhu, X. (Společnost pro radioelektronické inženýrství, 2012-12)
    In this article, a simple and efficient method is presented to design low radar cross section (RCS) patch antennas. This method consists of a hybrid optimization algorithm, which combines a genetic algorithm (GA) with tabu ...
  • Impedance Bandwidth and Gain Improvement for Microstrip Antenna Using Metamaterials 

    Xiong, H.; Hong, J. S.; Peng, Y. H. (Společnost pro radioelektronické inženýrství, 2012-12)
    An improved ultra-wideband (UWB) and high gain rectangular antenna is specifically designed in this paper using planar-patterned metamaterial concepts. The antenna has isolated triangle gaps and crossed gaps etched on the ...
  • 3-D Microwave Imaging for Breast Cancer 

    Cheng, G. G.; Zhu, Y.; Grzesik, J. (Společnost pro radioelektronické inženýrství, 2012-12)
    We introduce a novel microwave imaging technique for breast cancer detection. Our approach provides a one-pass inverse image solution, which is completely new and unprecedented, unrelated to tomography or radar-based ...
  • Optical Control of Millmeter-wave Lateral Double-Drift Region Silicon IMPATT Device 

    Acharyya, A.; Banerjee, S.; Banerjee, J. P. (Společnost pro radioelektronické inženýrství, 2012-12)
    The effect of optical illumination on lateral Double-Drift Region (DDR) structure of Silicon Impact Avalanche Transit Time (IMPATT) device is investigated in this paper. The device is designed to operate at mm-wave W-band ...
  • Utility based Dynamic Subcarrier Allocation for QoS Guarantees in SC-FMDA System 

    Li, Y. B.; Zhang, X.; Ye, F.; Gao, Z. G. (Společnost pro radioelektronické inženýrství, 2012-12)
    Two utility based dynamic subcarrier allocation (DSA) algorithms: the max exponential utility (MEU) algorithm and the max weighted exponential utility (MWEU) algorithm are proposed for quality of service (QoS) guarantees ...
  • Application of Artificial Neural Networks for Efficient High-Resolution 2D DOA Estimation 

    Agatonović, M.; Stanković, Z.; Doncov, N.; Sit, L.; Milovanović, B.; Zwick, T. (Společnost pro radioelektronické inženýrství, 2012-12)
    A novel method to provide high-resolution Two-Dimensional Direction of Arrival (2D DOA) estimation employing Artificial Neural Networks (ANNs) is presented in this paper. The observed space is divided into azimuth and ...