Now showing items 1-20 of 33

  • Everything You Wish to Know About Memristors But Are Afraid to Ask 

    Chua, L. (Společnost pro radioelektronické inženýrství, 2015-06)
    This paper classifies all memristors into three classes called Ideal, Generic, or Extended memristors. A subclass of Generic memristors is related to Ideal memristors via a one-to-one mathematical transformation, and is ...
  • Robust Simulation of a TaO Memristor Model 

    Ascoli, A.; Tetzlaff, R.; Chua, L. (Společnost pro radioelektronické inženýrství, 2015-06)
    This work presents a continuous and differentiable approximation of a Tantalum oxide memristor model which is suited for robust numerical simulations in software. The original model was recently developed at Hewlett Packard ...
  • Differential Equations of Ideal Memristors 

    Biolek, Zdeněk; Biolek, Dalibor; Biolková, Viera (Společnost pro radioelektronické inženýrství, 2015-06)
    Ideal memristor is a resistor with a memory, which adds dynamics to its behavior. The most usual characteristics describing this dynamics are the constitutive relation (i.e. the relation between flux and charge), or ...
  • Reliable Modeling of Ideal Generic Memristors via State-Space Transformation 

    Biolek, Dalibor; Biolek, Zdeněk; Biolková, Viera; Kolka, Zdeněk (Společnost pro radioelektronické inženýrství, 2015-06)
    The paper refers to problems of modeling and computer simulation of generic memristors caused by the so-called window functions, namely the stick effect, nonconvergence, and finding fundamentally incorrect solutions. A ...
  • Improved Model of TiO2 Memristor 

    Kolka, Zdeněk; Biolek, Dalibor; Biolková, Viera (Společnost pro radioelektronické inženýrství, 2015-06)
    Analysis of Pickett’s model of the HP TiO2 memristor presented in this paper reveals an ambiguity of its port equation, which may cause non-convergence, numerical errors, and non-physical solutions during time-domain ...
  • Transmission Cooperative Strategies for MIMO-OFDM Heterogeneous Networks 

    Ali, S.S.; Castanheira, D.; Silva, A.; Gameiro, A. (Společnost pro radioelektronické inženýrství, 2015-06)
    Mobile traffic in cellular networks is increasing exponentially, mainly due to the use of data intensive services like video. One way to cope with these demands is to reduce the cell-size by deploying small-cells along the ...
  • Semiempirical Modeling of Reset Transitions in Unipolar Resistive-Switching based Memristors 

    Picos, R.; Roldan, J.B.; Al Chawa, M.M.; Garcia-Fernandez, P.; Jimenez-Molinos, F.; Garcia-Moreno, E. (Společnost pro radioelektronické inženýrství, 2015-06)
    We have measured the transition process from the high to low resistivity states, i.e., the reset process of resistive switching based memristors based on Ni/HfO2/Si-n+ structures, and have also developed an analytical model ...
  • Labeling Diversity for 2x2 WLAN Coded-Cooperative Networks 

    Ejaz, S.; Yang, FengFan; Xu, HongJun (Společnost pro radioelektronické inženýrství, 2015-06)
    Labelling diversity is an efficient technique recently proposed in the literature and aims to improve the bit error rate(BER) performance of wireless local area network (WLAN) systems with two transmit and two receive ...
  • Gain Enhancement of a Wide Slot Antenna Using a Second-Order Bandpass Frequency Selective Surface 

    Chatterjee, A.; Parui, S. K. (Společnost pro radioelektronické inženýrství, 2015-06)
    Gain enhancement of a wide slot antenna over a wide frequency band using a low profile, second order bandpass frequency selective surface (FSS) as a superstrate is presented in this paper. The proposed multilayered FSS ...
  • A Frequency-Reconfigurable Monopole Antenna with Switchable Stubbed Ground Structure 

    Liu, X. L.; Yang, X. L.; Kong, F. L. (Společnost pro radioelektronické inženýrství, 2015-06)
    A frequency-reconfigurable coplanar-waveguide (CPW) fed monopole antenna using switchable stubbed ground structure is presented. Four PIN diodes are employed in the stubs stretching from the ground to make the antenna ...
  • Properties of the Optical Planar Polymer Waveguides Deposited on Printed Circuit Boards 

    Prajzler, V.; Nekvindova, P.; Hyps, P.; Jerabek, V. (Společnost pro radioelektronické inženýrství, 2015-06)
    This paper reports on a technology for realization of an optical planar waveguide layer on duroid substrate and on FR4 fiber reinforced board material printed circuit boards. Waveguide core material was EpoCore polymer and ...
  • A Memristor as Multi-Bit Memory: Feasibility Analysis 

    Bass, O.; Fish, A.; Naveh, D. (Společnost pro radioelektronické inženýrství, 2015-06)
    The use of emerging memristor materials for advanced electrical devices such as multi-valued logic is expected to outperform today's binary logic digital technologies. We show here an example for such non-binary device ...
  • Application of Memristors in Microwave Passive Circuits 

    Potrebic, M.; Tosic, D. (Společnost pro radioelektronické inženýrství, 2015-06)
    The recent implementation of the fourth fundamental electric circuit element, the memristor, opened new vistas in many fields of engineering applications. In this paper, we explore several RF/microwave passive circuits ...
  • A Compact Tri-band Printed Antenna for MIMO Applications 

    Zang, J. W.; Wang, X. T. (Společnost pro radioelektronické inženýrství, 2015-06)
    In this paper, a compact tri-band printed multi-input multi-output (MIMO) antenna with high isolation is presented to operate within WLAN and WiMAX frequency bands. By adopting a rectangular open-ended slot combined with ...
  • Classification of Overlapped Audio Events Based on AT, PLSA, and the Combination of Them 

    Leng, Y.; Sun, C. L.; Cheng, C. F.; Xu, X. Y.; Li, S.; Wan, H. L.; Fang, J.; Li, D. W. (Společnost pro radioelektronické inženýrství, 2015-06)
    Audio event classification, as an important part of Computational Auditory Scene Analysis, has attracted much attention. Currently, the classification technology is mature enough to classify isolated audio events accurately, ...
  • Robust Adaptive LCMV Beamformer Based On An Iterative Suboptimal Solution 

    Xiansheng Guo; Lei Chu; Baocang Li (Společnost pro radioelektronické inženýrství, 2015-06)
    The main drawback of closed-form solution of linearly constrained minimum variance (CF-LCMV) beamformer is the dilemma of acquiring long observation time for stable covariance matrix estimates and short observation time ...
  • Generalized detector as a spectrum sensor in cognitive radio networks 

    Shbat, M.S.; Tuzlukov, V.P. (Společnost pro radioelektronické inženýrství, 2015-06)
    The implementation of the generalized detector (GD) in cognitive radio (CR) systems allows us to improve the spectrum sensing performance in comparison with employment of the conventional detectors. We analyze the spectrum ...
  • A Novel Combined System of Direction Estimation and Sound Zooming of Multiple Speakers 

    Khaddour, H.; Schimmel, J.; Rund, F. (Společnost pro radioelektronické inženýrství, 2015-06)
    This article presents a new system for estimation the direction of multiple speakers and zooming the sound of one of them at a time. The proposed system is a combination of two levels; namely, sound source direction ...
  • Finding the Most Uniform Changes in Vowel Polygon Caused by Psychological Stress 

    Stanek, M.; Sigmund, M. (Společnost pro radioelektronické inženýrství, 2015-06)
    Using vowel polygons, exactly their parameters, is chosen as the criterion for achievement of differences between normal state of speaker and relevant speech under real psychological stress. All results were experimentally ...
  • Influence of Stereoscopic Camera System Alignment Error on the Accuracy of 3D Reconstruction 

    Bolecek, L.; Ricny, V. (Společnost pro radioelektronické inženýrství, 2015-06)
    The article deals with the influence of inaccurate rotation of cameras in camera system alignment on 3D reconstruction accuracy. The accuracy of the all three spatial coordinates is analyzed for two alignments (setups) of ...