Now showing items 1-17 of 17

  • Admission Control Techniques for UMTS System 

    Kejik, P.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2010-09)
    Universal mobile telecommunications system (UMTS) is one of the 3rd generation (3G) cell phone technologies. The capacity of UMTS is interference limited. Radio resources management (RRM) functions are therefore used. They ...
  • Advanced Fuzzy Logic Based Admission Control for UMTS System 

    Kejik, P.; Hanus, S.; Blumenstein, J. (Společnost pro radioelektronické inženýrství, 2010-12)
    The capacity of CDMA (Code Division Multiple Access) systems is interference limited. Therefore radio resources management (RRM) functions are used. They are responsible for supplying optimum coverage, ensuring efficient ...
  • Algorithms for Fast Computing of the 3D-DCT Transform 

    Fryza, T.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2003-04)
    The algorithm for video compression based on the Three-Dimensional Discrete Cosine Transform (3D-DCT) is presented. The original algorithm of the 3D-DCT has high time complexity. We propose several enhancements to the ...
  • Bluetooth and IEEE 802.11b/g Coexistence Simulation 

    Mikulka, J.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2008-09)
    This paper deals with the coexistence simulation of Bluetooth and Wi-Fi physical layers. Bluetooth and Wi-Fi systems share the same ISM 2.4 GHz frequency band and therefore using both systems in the same area may cause ...
  • Co-channel and Adjacent Channel Interference Measurement of UMTS and GSM/EDGE Systems in 900 MHz Radio Band 

    Gleissner, F.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2008-09)
    This paper is concerned with inter-system and intra-system interference measurements of 2.5G and 3G mobile communication systems. The both systems UMTS and GSM/EDGE are assumed to operate in a common radio band of 900 MHz. ...
  • Comparison of Fuzzy Logic and Genetic Algorithm Based Admission Control Strategies for UMTS System 

    Kejík, P.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2010-04)
    CDMA systems have so-called soft capacity, so the total number of possible sessions has not an exact value. The capacity of CDMA system depends on the interference level in the system. There are therefore RRM (Radio Resources ...
  • Enhanced Receivers for Interference Cancellation in 3G Systems 

    Kejik, P.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2009-12)
    Interference cancellation and multiuser detection in CDMA systems are still actual research topics. These techniques enable us to deal with interference and to increase system capacity. In this paper, a so-called Generalized ...
  • Image Compression Algorithms Optimized for MATLAB 

    Fryza, T.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2003-12)
    This paper describes implementation of the Discrete Cosine Transform (DCT) algorithm to MATLAB. This approach is used in JPEG or MPEG standards for instance. The substance of these specifications is to remove the considerable ...
  • The Laboratory of Wireless and Mobile Communications 

    Hanus, S. (Společnost pro radioelektronické inženýrství, 2001-12)
    The paper presents the basic information about establishing of the laboratory for Mobile Communications on the Dept. of Radio Electronics, Brno University of Technology. This information allows to experts from the practice ...
  • New Second-Order Optimized Filter Design 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Dostal, T.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2003-04)
    Starting from the piecewise-linear (PWL) autonomous dynamical system optimized from the eigenvalue sensitivities viewpoint the corresponding optimized non-autonomous linear (single-input single-output) system is derived. ...
  • Optimized Second-Order Dynamical Systems and Their RLC Circuit Models with PWL Controlled Sources 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Petrzela, J.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2004-09)
    Complementary active RLC circuit models with a voltage-controlled voltage source (VCVS) and a current-controlled current source (CCCS) for the second-order autonomous dynamical system realization are proposed. The main ...
  • Optimized State Model of Piecewise-Linear Dynamical Systems 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Michalek, V.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2003-04)
    The conditions for an optimized design of the second dynamical system having low eigenvalue sensitivities are directly derived. Their more general form is in accordance with the previous results obtained by using linear ...
  • Performance Analysis of PCFICH and PDCCH LTE Control Channels 

    Milos, J.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2014-04)
    Control channels play a key role in the evaluation of mobile system performance. The purpose of our paper is to evaluate the performance of the control channels implementation in the Long Term Evolution (LTE) system. The ...
  • Simple Chaotic Oscillator: From Mathematical Model to Practical Experiment 

    Petrzela, J.; Kolka, Zdeněk; Hanus, S. (Společnost pro radioelektronické inženýrství, 2006-04)
    This paper shows the circuitry implementation and practical verification of the autonomous nonlinear oscillator. Since it is described by a single third-order differential equation, its state variables can be considered ...
  • Synthesis of Optimized Piecewise-Linear Systems Using Similarity Transformation. Part III: Higher-Order Systems 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2002-06)
    State models of dynamical systems used as prototypes in their practical realization are optimized from the viewpoint of minimum eigenvalue sensitivities with respect to the change of the individual parameters. In the paper ...
  • UMTS Network Model for Interference Analysis - Optimization of Spreading Codes Order 

    Ruzicka, Z.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2007-09)
    This article deals with mathematical modeling of UMTS network. The presented model is designed for interference analysis in this network. The paper presents the set of simulations based on an idea of a specific order of ...
  • Wi-Fi Influence on LTE-U Downlink Data and Control Channel Performance in Shared Frequency Bands 

    Milos, J.; Polak, L.; Hanus, S.; Kratochvil, T. (Společnost pro radioelektronické inženýrství, 2017-04)
    Nowadays, providers of wireless services try to find appropriate ways to increase user data throughput mainly for future 5G cellular networks. Utilizing the unlicensed spectrum (ISM bands) for such purpose is a promising ...