Browsing 2016/2 by Issue Date
Now showing items 1-20 of 23
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A Compact Multiband BPF Using Step-impedance Resonators with Interdigital Capacitors
(Společnost pro radioelektronické inženýrství, 2016-06)A compact multiband band-pass filter design for applications of GSM, Wi-MAX and WLAN systems is presented. The design is based on the resonant characteristics of step-impedance and interdigital capacitor resonators with ... -
Ultra-Broad Band Radar Cross Section Reduction of Waveguide Slot Antenna with Metamaterials
(Společnost pro radioelektronické inženýrství, 2016-06)To reduce the radar cross section of a waveguide slot antenna, a three-layer metamaterial is presented based on orthogonal double split-ring resonators. The absorption characteristics of three-layer metamaterial are ... -
Miniaturized Dual-Band Aperture Coupled Microstrip Antenna Using Corrugated Ground
(Společnost pro radioelektronické inženýrství, 2016-06)A novel dual-band aperture coupled microstrip antenna with corrugated ground plane is proposed to improve radiation performance in this letter. The dual-band operation is obtained by embedding a S-shaped slot in the radiating ... -
High-Precision CMOS Analog Computational Circuits Based on a New Linearly Tunable OTA
(Společnost pro radioelektronické inženýrství, 2016-06)Implementation of CMOS current-mode analog computational circuits are presented in this paper. A new Linearly Tunable OTA is employed in a modified structure as a basic building block for implementation of the circuits ... -
Segmentation of Moving Object Using Background Subtraction Method in Complex Environments
(Společnost pro radioelektronické inženýrství, 2016-06)Background subtraction is an extensively used approach to localize the moving object in a video sequence. However, detecting an object under the spatiotemporal behavior of background such as rippling of water, moving curtain ... -
Improved Asymptotic Capacity Lower Bound for OFDM System with Compressed Sensing Channel Estimation for Bernoulli Gaussian Channel
(Společnost pro radioelektronické inženýrství, 2016-06)We propose an improved capacity lower bound for OFDM system with compressed sensing channel estimation for Bernoulli-Gaussian channel. We improve the known capacity lower bound which is based on Lasso compressed sensing ... -
Triangle/Square Waveform Generator Using Area Efficient Hysteresis Comparator
(Společnost pro radioelektronické inženýrství, 2016-06)A function generator generating both square and triangle waveforms is proposed. The generator employs only one low area comparator with accurate hysteresis set by a bias current and a resistor. Oscillation frequency and ... -
k-Nearest Neighbors Algorithm in Profiling Power Analysis Attacks
(Společnost pro radioelektronické inženýrství, 2016-06)Power analysis presents the typical example of successful attacks against trusted cryptographic devices such as RFID (Radio-Frequency IDentifications) and contact smart cards. In recent years, the cryptographic community ... -
Frequency Agile Radial-Shaped Varactor-Loaded Reflectarray Cell
(Společnost pro radioelektronické inženýrství, 2016-06)An equivalent circuit approach is adopted in this paper to analyze a novel varactor loaded phasing line, specifically designed to improve the frequency agility features of reconfigurable aperture-coupled reflectarray cell, ... -
Analysis of Intermodulation Distortion in OFDM Based Transmitter Using EER Technique
(Společnost pro radioelektronické inženýrství, 2016-06)During the last two decades, new digital modulation systems have appeared in the audio broadcasting. Such broadcasting systems require new transmitters’ concepts to enable the transmission of digitally modulated signals. ... -
A Low-Dropout Voltage Regulator with a Fractional-Order Control
(Společnost pro radioelektronické inženýrství, 2016-06)This paper presents a 5 V / 50 mA low-dropout voltage regulator (LDO). The LDO uses a fractional-order control for its regulation loop to achieve a high DC gain (for a tight DC regulation) while avoiding (for a good ... -
Novel CMOS Bulk-driven Charge Pump for Ultra Low Input Voltage
(Společnost pro radioelektronické inženýrství, 2016-06)In this paper, a novel bulk-driven cross-coupled charge pump designed in standard 90 nm CMOS technology is presented. The proposed charge pump is based on a dynamic threshold voltage inverter and is suitable for integrated ... -
Improvement of Reading Performance of Frequency-Domain Chipless RFID Transponders
(Společnost pro radioelektronické inženýrství, 2016-06)This review paper presents the summary of our investigations in several topics of frequency-domain chipless RFID transponders. The performance comparison of various types of scatterers used in the literature and recently ... -
Microwave Diplexer Purely Based on Direct Synchronous and Asynchronous Coupling
(Společnost pro radioelektronické inženýrství, 2016-06)A diplexer realized purely based on direct coupling is presented. No cross-coupling is involved in the design process. The microwave diplexer is achieved by coupling a dual-band bandpass filter onto two individual channel ... -
Properties of Siloxane Based Optical Waveguides Deposited on Transparent Paper and Foil
(Společnost pro radioelektronické inženýrství, 2016-06)In this paper, we present the properties of flexible planar optical waveguides made of siloxane-based polymer deposited on Xerox transparent paper and PLEXIGLAS foil substrate. Measurement of optical properties such as the ... -
Reduction of EMC Emissions in Mixed Signal Integrated Circuits with Embedded LIN Driver
(Společnost pro radioelektronické inženýrství, 2016-06)This paper describes several methods for reduction of electromagnetic emissions (EME) of mixed signal integrated circuits (IC). The focus is on the impact that a LIN bus communication block has on a complex IC which contains ... -
Performance of a Cognitive Relay Network under AF Relay Selection Scheme with Imperfect Channel Estimation
(Společnost pro radioelektronické inženýrství, 2016-06)In this paper outage performance of a secondary user (SU) is evaluated under amplify and forward (AF) relay selection scheme with an imperfect channel state information (CSI)while sharing spectrum in an underlay cognitive ... -
A Geometric Approach to Group Delay Network Synthesis
(Společnost pro radioelektronické inženýrství, 2016-06)All-pass networks with prescribed group delay are used for analog signal processing and equalisation of transmission channels. The state-of-the-art methods for synthesising quasi-arbitrary group delay functions using ... -
Efficient Design of Digital FIR Differentiator using $L_1$-Method
(Společnost pro radioelektronické inženýrství, 2016-06)In this paper, an efficient design of FIR digital differentiator using the L1-optimality criterion is proposed. We present a technique based on the modified Newton method to solve the design problem so that the optimal ... -
Reconfigurable Plasma Antenna Array by Using Fluorescent Tube for Wi-Fi Application
(Společnost pro radioelektronické inženýrství, 2016-06)This paper presents a new design of reconfigurable plasma antenna array using commercial fluorescent tube. A round shape reconfigurable plasma antenna array is proposed to collimate beam radiated by an omnidirectional ...