Browsing 2013/3 by Title
Now showing items 1-20 of 34
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ACPW Dual-Band Bandpass Filter with Independently Controllable Transmission Zeros
(Společnost pro radioelektronické inženýrství, 2013-09)Compact dual-band bandpass filters with stepped-impedance conductor-backed asymmetric coplanar waveguide resonators are proposed, and synthesis formulas are derived to facilitate the design. By using an asymmetric topology, ... -
Application of the CBF Method to the Scattering by Combinations of Bodies of Revolution and Arbitrarily Shaped Structures
(Společnost pro radioelektronické inženýrství, 2013-09)In this paper, an algorithm is described which enables efficient analysis of electromagnetic scattering by configurations consisting of arbitrarily shaped conducting bodies and conducting bodies of revolution (BoR). The ... -
Beamforming Network Using Dual Band-Dual Beam Reduced Size Butler Matrices
(Společnost pro radioelektronické inženýrství, 2013-09)The results of reduced- size cascaded Butler matrices developed for dual-band and dual-beam applications are presented in this paper. The meander-line technique, an acceptable approach for reducing the size of the radio ... -
Codes Cross-Correlation Impact on S-curve Bias and Data-Pilot Code Pairs Optimization for CBOC Signals
(Společnost pro radioelektronické inženýrství, 2013-09)The aim of this paper is to analyze the impact of spreading codes cross-correlation on code tracking performance, and to optimize the data-pilot code pairs of Galileo E1 Open Service (OS) Composite Binary Offset Carrier ... -
Compact and Broadband Microstrip-Line-Fed Modified Rhombus Slot Antenna
(Společnost pro radioelektronické inženýrství, 2013-09)The printed microstrip-line-fed broadband rhombus slot antenna is investigated in this paper. With the use of the offset microstrip feed line and the corner-truncated protruded ground plane, the bandwidth enhancement and ... -
A Compact Microstrip Low-Pass Filter Using D-CRLH Transmission Line with Ultra-Wide Stopband and High Selectivity
(Společnost pro radioelektronické inženýrství, 2013-09)A novel structure of dual-composite right/left-handed transmission line (D-CRLH TL) is proposed and analyzed in this paper. The simulated reaults show that there is a stopband between the first right-handed passband and ... -
A Compressed Sensing-Based Low-Density Parity-Check Real-Number Code
(Společnost pro radioelektronické inženýrství, 2013-09)In this paper, we propose a novel low-density parity-check real-number code, based on compressed sensing. A real-valued message is encoded by a coding matrix (with more rows than columns) and transmitted over an erroneous ... -
Connectivity-Based Self-Localization in WSNs
(Společnost pro radioelektronické inženýrství, 2013-09)Efficient localization methods are among the major challenges in wireless sensor networks today. In this paper, we present our so-called connectivity based approach i.e, based on local connectivity information, to tackle ... -
Cost-Efficient Development of Acoustic Models for Speech Recognition of Related Languages
(Společnost pro radioelektronické inženýrství, 2013-09)When adapting an existing speech recognition system to a new language, major development costs are associated with the creation of an appropriate acoustic model (AM). For its training, a certain amount of recorded and ... -
Design of a New Step-like Frame FBAR for Suppression of Spurious Resonances
(Společnost pro radioelektronické inženýrství, 2013-09)Film bulk acoustic wave resonators (FBARs) are of great interest for wireless applications due to its inherent advantages at microwave frequencies. However, the presence of spurious modes near the main resonance degrades ... -
Directional Relays for Multi-Hop Cooperative Cognitive Radio Networks
(Společnost pro radioelektronické inženýrství, 2013-09)In this paper, we investigate power allocation and beamforming in a relay assisted cognitive radio (CR) network. Our objective is to maximize the performance of the CR network while limiting interference in the direction ... -
Distributed Extended Kalman Filter for Position, Velocity, Time, Estimation in Satellite Navigation Receivers
(Společnost pro radioelektronické inženýrství, 2013-09)Common techniques for position-velocity-time estimation in satellite navigation, iterative least squares and the extended Kalman filter, involve matrix operations. The matrix inversion and inclusion of a matrix library ... -
An Efficient Sparse Representation Algorithm for Direction-of-Arrival Estimation
(Společnost pro radioelektronické inženýrství, 2013-09)This paper presents an efficient sparse representation approach to direction-of-arrival (DOA) estimation using uniform linear arrays. The proposed approach constructs the jointly sparse model in real domain by exploiting ... -
Electronic Nose Odor Classification with Advanced Decision Tree Structures
(Společnost pro radioelektronické inženýrství, 2013-09)Electronic nose (e-nose) is an electronic device which can measure chemical compounds in air and consequently classify different odors. In this paper, an e-nose device consisting of 8 different gas sensors was designed and ... -
Experimental Study of Electrophoretic Deposited Carbon Nanotubes on Microstrip Transmission Line Resonators and Filters
(Společnost pro radioelektronické inženýrství, 2013-09)The electrical properties of single-walled carbon nanotube electrophoreses deposition on different types of gold-plated microstrip devices are investigated. Simple transmission lines, transmission line resonators and filters ... -
Fade Depth Prediction Using Human Presence for Real Life WSN Deployment
(Společnost pro radioelektronické inženýrství, 2013-09)Current problem in real life WSN deployment is determining fade depth in indoor propagation scenario for link power budget analysis using (fade margin parameter). Due to the fact that human presence impacts the performance ... -
Genetic Algorithm Optimization of a High-Directivity Microstrip Patch Antenna Having a Rectangular Profile
(Společnost pro radioelektronické inženýrství, 2013-09)A single high-directivity microstrip patch antenna (MPA) having a rectangular profile, which can substitute a linear array is proposed. It is designed by using genetic algorithms with the advantage of not requiring a feeding ... -
HAPS Gateway Link in the 5850-7075 MHz and Coexistence with Fixed Satellite Service
(Společnost pro radioelektronické inženýrství, 2013-09)Gateway link is essential to connect HAPS platform to terrestrial based networks. This crucial link is incorporated in HAPS fixed service spectrum allocation in considerably high frequencies, renders the link for more ... -
Investigation of Compact Low Pass Filter with Sharp Cut–Off using Metamaterial
(Společnost pro radioelektronické inženýrství, 2013-09)In this paper a new compact microstrip Bessel low pass filter (LPF) is experimentally validated using complementary split ring resonator (CSRR) which has sharper cut-off and improved spurious band suppression characteristics. ... -
MIDAS: Automated Approach to Design Microwave Integrated Inductors and Transformers on Silicon
(Společnost pro radioelektronické inženýrství, 2013-09)The design of modern radiofrequency integrated circuits on silicon operating at microwave and millimeter-waves requires the integration of several spiral inductors and transformers that are not commonly available in the ...