2011/2
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Attenuation in Rectangular Waveguides with Finite Conductivity Walls
(Společnost pro radioelektronické inženýrství, 2011-06)We present a fundamental and accurate approach to compute the attenuation of electromagnetic waves propagating in rectangular waveguides with finite conductivity walls. The wavenumbers kx and ky in the x and y directions ... -
Utilization of Selected Data Mining Methods for Communication Network Analysis
(Společnost pro radioelektronické inženýrství, 2011-06)The aim of the project was to analyze the behavior of military communication networks based on work with real data collected continuously since 2005. With regard to the nature and amount of the data, data mining methods ... -
Design, Fabrication and Properties of Rib Poly(methylmethacrylimide) Optical Waveguides
(Společnost pro radioelektronické inženýrství, 2011-06)We report about design, fabrication and properties of the polymer optical waveguides deposited on silica-on-silicon substrate. The design of the waveguides is based on a concept that geometric dimensions of the single mode ... -
A Compact Printed Monopole Antenna for Dual-band RFID and WLAN Applications
(Společnost pro radioelektronické inženýrství, 2011-06)Design of a simple and compact microstrip-fed printed monopole antenna (PMA) for applications in wireless local area network (WLAN) and radio frequency identification (RFID) is presented. The dual-band operation is achieved ... -
Estimation of Outage Capacity for Free Space Optical Links Over I-K and K Turbulent Channels
(Společnost pro radioelektronické inženýrství, 2011-06)The free space optical communication systems are attracting great research and commercial interest due to their capability of transferring data, over short distances, with high rate and security, low cost demands and without ... -
A Sequential Circuit-Based IP Watermarking Algorithm for Multiple Scan Chains in Design-for-Test
(Společnost pro radioelektronické inženýrství, 2011-06)In Very Large Scale Integrated Circuits (VLSI) design, the existing Design-for-Test(DFT) based watermarking techniques usually insert watermark through reordering scan cells, which causes large resource overhead, low ... -
Experimental Research of Harmonic Spectrum of Currents at Traction Drive with PMSM
(Společnost pro radioelektronické inženýrství, 2011-06)The paper deals with the significant results of the experimental research of current harmonic spectrum of traction drive with permanent magnet synchronous motor. The experiments were done on a special workplace with a real ... -
A Robust Image Watermarking Based on Image Restoration Using SIFT
(Společnost pro radioelektronické inženýrství, 2011-06)This paper introduces a novel robust watermarking scheme for digital images, which is robust against common signal processing and geometric distortion attacks. In order to be resistant to geometric distortion attacks, the ... -
Evaluation and Investigation of the Delay in VoIP Networks
(Společnost pro radioelektronické inženýrství, 2011-06)The paper is focused mainly on the delay problems, which considerably influence the final quality of connections in VoIP (Voice over IP) networks. The paper provides a detailed exploration of the nature and mechanisms of ... -
Edge Detection with Sub-pixel Accuracy Based on Approximation of Edge with Erf Function
(Společnost pro radioelektronické inženýrství, 2011-06)Edge detection is an often used procedure in digital image processing. For some practical applications is desirable to detect edges with sub-pixel accuracy. In this paper we present edge detection method for 1-D images ... -
Compact and Sharp-Rejection Bandstop Filter Using Uniplanar Double Spiral Resonant Cells
(Společnost pro radioelektronické inženýrství, 2011-06)A novel compact bandstop filter composed of three cascaded uniplanar double spiral resonant cells (UDSRCs) for high attenuation rates is presented. Through the equivalent circuit prediction and parametric analysis, it is ... -
Theoretical Model of the Bistable Semiconductor Laser Diode Based on the Rate Equations
(Společnost pro radioelektronické inženýrství, 2011-06)The paper describes theoretical and experimental results that enabled the authors to proof optical bistability behavior of a specially modified bistable semiconductor laser diode (BLD) created on a structure with a saturable ... -
An Issue of Boundary Value for Velocity and Training Overhead Using Cooperative MIMO Technique in Wireless Sensor Network
(Společnost pro radioelektronické inženýrství, 2011-06)A boundary value of velocity of data gathering node (DGN) and a critical value for training overhead beyond which the cooperative communication in wireless sensor network will not be feasible is proposed in this paper. ... -
Effects of Imperfect Reference Signal Recovery on Performance of SC and SSC Receivers over Generalized Fading Channels
(Společnost pro radioelektronické inženýrství, 2011-06)This paper presents the study of the effects of imperfect reference signal recovery on the bit error rate (BER) performance of dual-branch switch-and-stay combining (SSC) and multibranch selection combining (SC) receivers ... -
Modeling Deterministic Chaos Using Electronic Circuits
(Společnost pro radioelektronické inženýrství, 2011-06)This paper brings a note on systematic circuit synthesis methods for modeling the dynamical systems given by mathematical model. Both classical synthesis and integrator based method is demonstrated via the relatively ... -
Photovoltaic Panel Modeling in MATLAB® Environment
(Společnost pro radioelektronické inženýrství, 2011-06)This article is focused on the original photovoltaic panel model identification method. The method is based on the measured characteristics for given irradiation. The system can automatically create a mathematical model ... -
RF and THz Identification Using a New Generation of Chipless RFID Tags
(Společnost pro radioelektronické inženýrství, 2011-06)This article presents two chipless RFID approaches where data are reading using electromagnetic waves and where the medium encoding the data is completely passive. The former approach rests on the use of RF waves (more ... -
Wireless Power Transmission for Power Supply: State of Art
(Společnost pro radioelektronické inženýrství, 2011-06)The wireless power supply is motivated by simple and comfortable use of many small electric appliances with low power input. This paper reviews the concepts which are suitable for wireless power transmission with respect ... -
Theoretical Findings and Measurements on Planning a UHF RFID System inside a Room
(Společnost pro radioelektronické inženýrství, 2011-06)This paper investigates the problem of improving the identification performance of a UHF RFID system inside a room. We assume static reader, passive tags and availability of commodity antennas. A ray-tracing propagation ... -
3D UWB Magnitude-Combined Tomographic Imaging for Biomedical Applications. Algorithm Validation
(Společnost pro radioelektronické inženýrství, 2011-06)Biomedical microwave imaging is a topic of continuous research for its potential in different areas especially in breast cancer detection. In this paper, 3D UWB Magnitude-Combined tomographic algorithm is assessed for this ...
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