Browsing 2013/4 by Issue Date

Now showing items 1-20 of 42

  • Polarization Decomposition Algorithm for Detection Efficiency Enhancement 

    Zhang, Chao-Zhu; Zhang, Jing; Liu, Cheng-Yuan; Li, Lin (Společnost pro radioelektronické inženýrství, 2013-12)
    In the paper, a new polarization decomposition of the optimal detection algorithm in the partially homogeneous environment is presented. Firstly, the detectors Matched Subspace Detector (MSD) and Adaptive Subspace Detector ...

  • A Three-Dimensional DRAM Using Floating Body Capacitance Cells in an FD-SOI Process 

    Liu, Xuelian; Zia, Aamir (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper describes a three- dimensional DRAM in which the floating body capacitance (FBC) of a fully depleted SOI (FD-SOI) device is used as a storage node. This 1T DRAM lends itself particularly well to a 3D wafer-to-wafer ...

  • Novel Empirical Equations to Calculate the Impedance of a Strip Dipole Antenna 

    Keyrouz, S.; Visser, H. J.; Tijhuis, A. G. (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper investigates the input impedance of strip dipoles since they are the basic elements of folded strip dipole antennas. A novel, simple and accurate design algorithm is presented. Compared to state-of-the art design ...

  • Closed-Form Approximation for Parallel-Plate Waveguide Coefficients 

    Valtr, Pavel; Pechac, Pavel (Společnost pro radioelektronické inženýrství, 2013-12)
    Simple closed-form formulas for calculating coefficients of modes excited in a parallel-plate waveguide illuminated by a planar wave are presented. The mode-matching technique and Green’s formula are used to arrive at a ...

  • An Efficient Method for GPS Multipath Mitigation Using the Teager-Kaiser-Operator-based MEDLL 

    Hui, Yi; Song, Maozhong; Meng, Bin; Dang, Xiaoyu (Společnost pro radioelektronické inženýrství, 2013-12)
    An efficient method for GPS multipath mitigation is proposed. The motivation for this proposed method is to integrate the Teager-Kaiser Operator (TKO) with the Multipath Estimating Delay Lock Loop (MEDLL) module to mitigate ...

  • Local Features and Takagi-Sugeno Fuzzy Logic based Medical Image Segmentation 

    Javed, Umer; Riaz, Muhammad Mohsin; Ghafoor, Abdul; Cheema, Tanveer Ahmed (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper presents an improved region scalable fitting model that uses fuzzy weighted local features and active contour model for medical image segmentation. Local variance is used with local entropy to extract the regional ...

  • Channel Parameters Estimation Algorithm Based on The Characteristic Function under Impulse Noise Environment 

    Xu, Zhijiang; Wang, Kang; Meng, Limin (Společnost pro radioelektronické inženýrství, 2013-12)
    Under communication environments, such as wireless sensor networks, the noise observed usually exhibits impulsive as well as Gaussian characteristics. In the initialization of channel iterative decoder, such as low density ...

  • Effect of Location Accuracy and Shadowing on the Probability of Non-Interfering Concurrent Transmissions in Cognitive Ad Hoc Networks 

    Montejo, Samuel; Souza, Richard Demo; Fernandez, Evelio M. G.; Alfonso, Vitalio; Godoy, Walter (Společnost pro radioelektronické inženýrství, 2013-12)
    Cognitive radio ad hoc systems can coexist with a primary network in a scanning-free region, which can be dimensioned by location awareness. This coexistence of networks improves system throughput and increases the efficiency ...

  • Inverter-Based Low-Voltage CCII- Design and Its Filter Application 

    Hwang, Yuh-Shyan; Ku, Yi-Tsen; Chen, Jiann-Jong; Yu, Cheng-Chieh (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper presents a negative type second-generation current conveyor (CCII-). It is based on an inverter-based low-voltage error amplifier, and a negative current mirror. The CCII- could be operated in a very low supply ...

  • Broadband RCS Reduction of Microstrip Patch Antenna Using Bandstop Frequency Selective Surface 

    Yang, Huan-huan; Cao, Xiang-yu; Zheng, Qiu-rong; Ma, Jia-jun; Li, Wen-qiang (Společnost pro radioelektronické inženýrství, 2013-12)
    In this article, a simple and effective approach is presented to reduce the Radar Cross Section (RCS) of microstrip patch antenna in ultra broad frequency band. This approach substitutes a metallic ground plane of a ...

  • A Robust Image Hashing Algorithm Resistant Against Geometrical Attacks 

    Liu, YuLing; Xiao, Yong (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper proposes a robust image hashing method which is robust against common image processing attacks and geometric distortion attacks. In order to resist against geometric attacks, the log-polar mapping (LPM) and ...

  • A Low-Voltage Electronically Tunable MOSFET-C Voltage-Mode First-Order All-Pass Filter Design 

    Metin, Bilgin; Herencsar, Norbert; Cicekoglu, Oguzhan (Společnost pro radioelektronické inženýrství, 2013-12)
    This paper presents a simple electronically tunable voltage-mode first-order all-pass filter realization with MOSFET-C technique. In comparison to the classical MOSFET-C filter circuits that employ active elements including ...

  • A Novel Planar Fractal Antenna with CPW-Feed for Multiband applications 

    Joseph, Saira; Paul, Binu; Mridula, Shanta; Mohanan, Pezholil (Společnost pro radioelektronické inženýrství, 2013-12)
    In this paper, a multiband antenna using a novel fractal design is presented. The antenna structure is formed by inscribing a hexagonal slot within a circle. This base structure is then scaled and arranged within the hexagon ...

  • Numerical Study on Indoor Wideband Channel Characteristics with Different Internal Wall 

    Yang, Xue-Song; Tian, Zhi-Ming; Yuan, Jia-Jie; Zhang, Yi-Teng; Shao, Wei (Společnost pro radioelektronické inženýrství, 2013-12)
    Effects of material and configuration of the internal wall on the performance of wideband channel are investigated by using the Finite Difference Time-Domain (FDTD) method. The indoor wideband channel characteristics, such ...

  • Prague's Emission Fourier Transform Microwave Spectrometer - Design and Preliminary Results 

    Kabourek, Vaclav; Cerny, Petr; Piksa, Petr; Studecky, Tomas; Kania, Patrik; Urban, Stepan (Společnost pro radioelektronické inženýrství, 2013-12)
    The design, performance and operation of the high resolution microwave spectrometer are described. The spectrometer is based on the Fabry-Perot resonator supplemented by a pulsed supersonic nozzle for adiabatic cooling of ...

  • Design and Investigation of Photonic Remote Antenna Units for Bidirectional Transmission in the Last Mile Wireless over Fiber System 

    Lysiuk, Anna; Godziszewski, Konrad; Yashchyshyn, Yevhen; Modelski, Jozef (Společnost pro radioelektronické inženýrství, 2013-12)
    In the article three different photonic Remote Antenna Units (RAU) in the last mile Wireless over Fiber links are presented. For construction of RAU commercially available optoelectronic devices were used. The solutions ...

  • On the Realization of First-Order Current-Mode AP/HP Filter 

    Tangsrirat, Worapong (Společnost pro radioelektronické inženýrství, 2013-12)
    A compact circuit topology for the realization of the current-mode first-order allpass (AP) and highpass (HP) filters is described. The proposed circuit contains a minimum number of components, i.e., eight bipolar transistors ...

  • IR Thermometer with Automatic Emissivity Correction 

    Dobesch, Ales; Poliak, Juraj (Společnost pro radioelektronické inženýrství, 2013-12)
    The paper describes the design and implementation of an infrared (IR) thermometer with automatic emissivity correction. The temperature measurement is carried out by the simple digital thermopile sensor MLX90614. The ...

  • Design of a Compact Wideband Antenna Array for Microwave Imaging Applications 

    Puskely, Jan; Mikulasek, Tomas; Raida, Zbynek (Společnost pro radioelektronické inženýrství, 2013-12)
    In the paper, wideband antenna arrays aimed at microwave imaging applications and SAR applications operating at Ka band were designed. The antenna array feeding network is realized by a low-loss SIW technology. Moreover, ...

  • A Joint Link and Channel Assignment Routing Scheme for Cognitive Radio Networks 

    Zhao, Hangsheng; Zhang, Jianzhao; Zhuang, Weihua (Společnost pro radioelektronické inženýrství, 2013-12)
    Cognitive radio (CR) is a promising technology that enables opportunistic utilization of the temporarily vacant spectrum to mitigate the spectrum scarcity in wireless communications. Since secondary users (SUs) should ...