Now showing items 1-20 of 28

  • Comments on Pinched Hysteresis Loops of Memristive Elements 

    Biolek, Zdeněk; Biolek, Dalibor; Biolková, Viera; Kolka, Zdeněk (Společnost pro radioelektronické inženýrství, 2015-12)
    The hysteresis loops pinched in the v-i origin belong to well-known fingerprints of memristive elements driven by bipolar periodical signals. Some element properties follow from the loop behavior in the close neighborhood ...
  • Low-profile Circularly Polarized Antenna Exploiting Fabry-Perot Resonator Principle 

    Pítra, Kamil; Raida, Zbyněk; Lacik, J. (Společnost pro radioelektronické inženýrství, 2015-12)
    We designed a patch antenna surrounded by a mushroom-like electromagnetic band-gap (EBG) structure and completed it by a partially reflective surface (PRS). EBG suppresses surface waves and creates the bottom wall of the ...
  • Generalized Propagation Channel Model for 2GHz Low Elevation Links Using a Ray-tracing Method 

    Zeleny, J.; Perez-Fontan, F.; Pechač, Pavel (Společnost pro radioelektronické inženýrství, 2015-12)
    Unmanned Aerial Vehicles (UAV) will increasingly be used for responding to emergencies or for law enforcement in civil surveillance applications. Transferring the enormous amounts of information from UAV-mounted cameras ...
  • Video Tracking for Visual Degraded Aerial Vehicle with H-PMHT 

    Pakfiliz, A. G. (Společnost pro radioelektronické inženýrství, 2015-12)
    The work presented in this paper describes a novel approach for automatic video tracking of visual degraded air vehicles in daylight with sky background. The offered and applied video object tracking method is based on ...
  • Energy Efficient Power Allocation for Distributed Antenna System over Shadowed Nakagami Fading Channel 

    Ying Wang; Xiangbin Yu; Yang Li; Binbin Wu (Společnost pro radioelektronické inženýrství, 2015-12)
    In this paper, the energy efficiency (EE) of downlink distributed antenna system (DAS) with multiple receive antennas is investigated over composite fading channel that takes the path loss, shadow fading and Nakagami-m ...
  • Development of a Symmetric Ring Junction as a Four-Port Reflectometer for Complex Reflection Coefficient Measurements 

    Lee, K.Y.; Chung, B. K.; You, K. Y.; Cheng, E. M.; Abbas, Z. (Společnost pro radioelektronické inženýrství, 2015-12)
    Six-port reflectometer is well-known for its ability to measure magnitude and phase-shift of microwave signal using four power detectors that perform magnitude-only measurements. This paper presents the development of an ...
  • Cross-Layer Combining of Adaptive Modulation and Truncated ARQ in Multichannel Beamforming MIMO Systems 

    Ivanis, P.; Drajic, D.; Brkic, S. (Společnost pro radioelektronické inženýrství, 2015-12)
    In this study the authors provide a cross-layer design of multiple-input-multiple-output (MIMO) systems, with the aim to maximize spectral efficiency. We consider MIMO systems based on a multichannel beamforming technique ...
  • Analysis of Coexistence of DRM Plus and FM Broadcasting Systems 

    Ulovec, K. (Společnost pro radioelektronické inženýrství, 2015-12)
    This paper deals with DRM (Digital Radio Mondiale) Plus and FM (Frequency Modulation) radio broadcasting systems coexistence. It brings results based on measurement of mutual interferences of each to other. Minimal necessary ...
  • Efficient Simulation for Fixed-Receiver Bistatic SAR with Time and Frequency Synchronization Errors 

    Feifei Yan; Wenge Chang; Xiangyang Li (Společnost pro radioelektronické inženýrství, 2015-12)
    Time and frequency synchronization is the key technique of bistatic synthetic aperture radar (BiSAR) system, and raw data simulation is an effective tool for verifying the time and frequency synchronization techniques. ...
  • Generalized Analysis Method for a Class of Novel Wideband Loaded-Stub Phase Shifters 

    Sensong An; Badar Muneer; Qi Zhu (Společnost pro radioelektronické inženýrství, 2015-12)
    In this paper, an analysis method of wideband loaded-stub phase shifters and a fast designing procedure is presented. These kinds of phase shifters use a transmission line loaded with one or two open stubs and a reference ...
  • A Robust Color Image Watermarking Scheme Using Entropy and QR Decomposition 

    Laur, L.; Rasti, P.; Agoyi, M.; Anbarjafari, G. (Společnost pro radioelektronické inženýrství, 2015-12)
    Internet has affected our everyday life drastically. Expansive volumes of information are exchanged over the Internet consistently which causes numerous security concerns. Issues like content identification, document and ...
  • Ku Band Rotary Joint Design for SNG Vehicles 

    Torpi,H.; Bostan, S. M. (Společnost pro radioelektronické inženýrství, 2015-12)
    A wideband I-type rectangular waveguide rotary joint (RJ) is designed, simulated and built. It has an excellent performance over the whole Ku Band (10.7-14.5 GHz) where the return loss is less than -23 dB at its highest ...
  • Cascade Structure of Digital Predistorter for Power Amplifier Linearization 

    Solovyeva, E. B. (Společnost pro radioelektronické inženýrství, 2015-12)
    In this paper, a cascade structure of nonlinear digital predistorter (DPD) synthesized by the direct learning adaptive algorithm is represented. DPD is used for linearization of power amplifier (PA) characteristic, namely ...
  • A Microwave Metamaterial Inspired Sensor for Non-Invasive Blood Glucose Monitoring 

    Vrba, J.; Vrba, D. (Společnost pro radioelektronické inženýrství, 2015-12)
    In this paper, a microwave sensor based on an artificial transmission line is proposed for non-invasive blood glucose monitoring. A corresponding numerical model of the sensor implemented in microstrip technology is created ...
  • High Voltage Coil Current Sensor for DC-DC Converters Employing DDCC 

    Drinovsky, M.; Hospodka, J. (Společnost pro radioelektronické inženýrství, 2015-12)
    Current sensor is an integral part of every switching converter. It is used for over-current protection, regulation and in case of multiphase converters for balancing. A new high voltage current sensor for coil-based current ...
  • Multi-Core DSP Based Parallel Architecture for FMCW SAR Real-Time Imaging 

    Gu, C. F.; Chang, W. G.; Li, X. Y.; Liu, Z. H. (Společnost pro radioelektronické inženýrství, 2015-12)
    This paper presents an efficient parallel processing architecture using multi-core Digital Signal Processor (DSP) to improve the capability of real-time imaging for Frequency Modulated Continuous Wave Synthetic Aperture ...
  • Efficient Resource Allocation and Sectorization for Fractional Frequency Reuse (FFR) in LTE Femtocell Systems 

    Kawser, M. T.; Islam, M. R.; Ahmed, K. I.; Karim, M. R.; Saif, J. B. (Společnost pro radioelektronické inženýrství, 2015-12)
    The Fractional Frequency Reuse (FFR) is a resource allocation technique that can effectively mitigate inter-cell interference (ICI) in LTE based HetNets and it is a promising solution. Various FFR schemes have been suggested ...
  • A Novel Diversity Receiver Structure for Severe Fading and Frequency Offset Conditions 

    Dimitrijevic, B.; Krstic, V.; Nikolic, B. (Společnost pro radioelektronické inženýrství, 2015-12)
    This paper presents a novel diversity receiver of MPSK signal in fading channel in the presence of the carrier frequency offset. As a part of this receiver, a new algorithm for the estimation of the combining coefficients ...
  • Interference Suppression Performance of Automotive UWB Radars Using Pseudo Random Sequences 

    Pasya, I.; Kato, H.; Kobayashi, T. (Společnost pro radioelektronické inženýrství, 2015-12)
    Ultra wideband (UWB) automotive radars have attracted attention from the viewpoint of reducing traffic accidents. The performance of automotive radars may be degraded by interference from nearby radars using the same ...
  • Power Dissipation of Memristor-Based Relaxation Oscillators 

    Fouda, M. E.; Radwan, A. G. (Společnost pro radioelektronické inženýrství, 2015-12)
    Recently, many reactance-less memristive relaxation oscillators were introduced, where the charging and discharging processes depend on memristors. In this paper, we investigate the power dissipation in different memristor ...