Browsing 2013/3 by Issue Date
Now showing items 1-20 of 34
-
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 ... -
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 ... -
Ultra Low-Power Analog Median Filters
(Společnost pro radioelektronické inženýrství, 2013-09)The design and implementation of three analog median filter topologies, whose transistors operate in the deep weak-inversion region, is described. The first topology is a differential pairs array, in which drain currents ... -
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 ... -
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 ... -
Robust Power and Subcarrier Allocation for OFDM-based Cognitive Radio Networks Considering Spectrum Sensing Uncertainties
(Společnost pro radioelektronické inženýrství, 2013-09)In this paper, we address power and subcarrier allocation for cooperative cognitive radio (CR) networks in the presence of spectrum sensing errors. First, we derive the mutual interference of primary and secondary ... -
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 ... -
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 ... -
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 ... -
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, ... -
Segmentation of Sedimentary Grain in Electron Microscopy Image
(Společnost pro radioelektronické inženýrství, 2013-09)This paper describes a novel method developed for the segmentation of sedimentary grains in electron microscopy images. The algorithm utilizes the approach of region splitting and merging. In the splitting stage, the ... -
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 ... -
A Powerful Optimization Tool for Analog Integrated Circuits Design
(Společnost pro radioelektronické inženýrství, 2013-09)This paper presents a new optimization tool for analog circuit design. Proposed tool is based on the robust version of the differential evolution optimization method. Corners of technology, temperature, voltage and current ... -
A Novel (DDCC-SFG)-Based Systematic Design Technique of Active Filters
(Společnost pro radioelektronické inženýrství, 2013-09)This paper proposes a novel idea for the synthesis of active filters that is based on the use of signal-flow graph (SFG) stamps of differential difference current conveyors (DDCCs). On the basis of an RLC passive network ... -
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 ... -
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 ... -
A Novel Electronically Controllable of Current-mode Level Shifted Multicarrier PWM Based on MO-CFTA
(Společnost pro radioelektronické inženýrství, 2013-09)This paper proposes the application of an electronically controlled current-mode for a level shifted multicarrier PWM generator. The proposed circuit consists of two multiple-output current follower transconductance ... -
A Separation Algorithm for Sources with Temporal Structure Only Using Second-order Statistics
(Společnost pro radioelektronické inženýrství, 2013-09)Unlike conventional blind source separation (BSS) deals with independent identically distributed (i.i.d.) sources, this paper addresses the separation from mixtures of sources with temporal structure, such as linear ... -
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 ...