Browsing 2015/4 by Issue Date

Now showing items 1-20 of 28

  • Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology 

    Kunto, Terdsak; Prommee, Pipat; Abuelma'atti, Muhammad Taher (Společnost pro radioelektronické inženýrství, 2015-12)
    This paper describes the design of current mode low-pass ladder filters based on CMOS technology. The filters are derived from passive RLC ladder filter prototypes using new CMOS lossy and lossless integrators. The all-pole ...

  • Ku Band Rotary Joint Design for SNG Vehicles 

    Torpi, Hamid; Bostan, Salih Mehmed (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 ...

  • Multi-Core DSP Based Parallel Architecture for FMCW SAR Real-Time Imaging 

    Gu, Chengfei; Chang, Wenge; Li, Xiangyang; Liu, Zhaohe (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 ...

  • A Robust Color Image Watermarking Scheme Using Entropy and QR Decomposition 

    Laur, Lauri; Rasti, Pejman; Agoyi, Mary; Anbarjafari, Gholamreza (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 ...

  • A Novel Diversity Receiver Structure for Severe Fading and Frequency Offset Conditions 

    Dimitrijevic, Bojan; Krstic, Vladimir; Nikolic, Bojana (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 ...

  • Analysis of Coexistence of DRM Plus and FM Broadcasting Systems 

    Ulovec, Karel (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 ...

  • Cross-Layer Combining of Adaptive Modulation and Truncated ARQ in Multichannel Beamforming MIMO Systems 

    Ivanis, Predrag; Drajic, Dejan; Brkic, Srdan (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 ...

  • Efficient Resource Allocation and Sectorization for Fractional Frequency Reuse (FFR) in LTE Femtocell Systems 

    Kawser, Mohammad T.; Islam, Mohammad R.; Ahmed, Kazi I.; Karim, Mir R.; Saif, Jaeed 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 ...

  • Optimization of Far-Field Antenna Range 

    Cerny, Ondrej; Dolecek, Radovan; Kopecky, Petr; Schejbal, Vladimir; Zavodny, Vadim (Společnost pro radioelektronické inženýrství, 2015-12)
    Measurements of test antennas are performed on antenna ranges. The operated microwave far-field outdoor range was built-up in 1970’s and therefore it was not appropriate for the today measurements. Thus, it was decided to ...

  • Comments on Pinched Hysteresis Loops of Memristive Elements 

    Biolek, Zdenek; Biolek, Dalibor; Biolkova, Viera; Kolka, Zdenek (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 ...

  • Energy Efficient Power Allocation for Distributed Antenna System over Shadowed Nakagami Fading Channel 

    Wang, Ying; Yu, Xiangbin; Li, Yang; Wu, Binbin (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 ...

  • A Microwave Metamaterial Inspired Sensor for Non-Invasive Blood Glucose Monitoring 

    Vrba, Jan; Vrba, David (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, Martin; Hospodka, Jiri (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 ...

  • Power Dissipation of Memristor-Based Relaxation Oscillators 

    Fouda, Mohammed E.; Radwan, Ahmed 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 ...

  • Research of the Defects in Anesthetic Masks 

    Laucka, Andrius; Andriukaitis, Darius (Společnost pro radioelektronické inženýrství, 2015-12)
    The article concerns the computer-assisted vision system created for the detection of the disposable anesthetic respiratory masks. This article provides the classification of defects which may be common to both rubber and ...

  • Efficient Simulation for Fixed-Receiver Bistatic SAR with Time and Frequency Synchronization Errors 

    Yan, Feifei; Chang, Wenge; Li, Xiangyang (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. ...

  • Low-profile Circularly Polarized Antenna Exploiting Fabry-Perot Resonator Principle 

    Pitra, Kamil; Raida, Zbynek; Lacik, Jaroslav (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 ...

  • Interference Suppression Performance of Automotive UWB Radars Using Pseudo Random Sequences 

    Pasya, Idnin; Kato, Hiroshi; Kobayashi, Takehiko (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 ...

  • Pascal-Interpolation-Based Noninteger Delay Filter and Low-Complexity Realization 

    Soontornwong, Parinya; Chivapreecha, Sorawat (Společnost pro radioelektronické inženýrství, 2015-12)
    This paper proposes a new method for designing the polynomial-interpolation-type noninteger-delay filter with a new structure formulation. Since the design formulation and the new realization structure are based on the ...

  • Generalized Analysis Method for a Class of Novel Wideband Loaded-Stub Phase Shifters 

    An, Sensong; Muneer, Badar; Zhu, Qi (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 ...