Browsing 2020/1 by Title
Now showing items 1-20 of 30
-
Analyzing the Resonance Resultant from the Capacitive Effects in Bulk Current Injection Probe
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper, the effect of the slot distance, existed between the two parts of BCI-probe shield, on its performance is studied, therefore, two ferrite materials with the same size and different characteristics are used ... -
Automatic Image Matting of Synthetic Aperture Radar Target Chips
(Společnost pro radioelektronické inženýrství, 2020-04)A matting technique to extract the targets from synthetic aperture radar (SAR) images is presented. Binary segmentation is performed initially for rough identification of target boundaries. Trimap is then estimated by ... -
Circularly Polarized Printed Helix Antenna for L- and S-Bands Applications
(Společnost pro radioelektronické inženýrství, 2020-04)The first aim of this work is to design a new geometry of printed helix antennas in a simple structure that only uses planar FR4 substrates, unlike conventional wire helix antennas. The main body of helix comprises four ... -
A Compact SIW Power Divider for Dual-Band Applications
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper, a novel design of highly compact power divider employing substrate-integrated waveguide (SIW) is proposed for dual-band applications. The double-ring asymmetric complimentary split-ring resonators (CSRRs) ... -
DAB+ Network Implementation in the Czech Republic and Impact of the Audio Coding on Subjective Perception of Sound Quality
(Společnost pro radioelektronické inženýrství, 2020-04)Digital Audio Broadcasting (DAB+) is becoming a reality in the Czech Republic. The first nationwide DAB+ network, based on the regular broadcasting, is being completed. This paper presents the principles that were used to ... -
Distributed Network Tomography Applied to Stochastic Delay Profile Estimation
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper is shown, how delay properties of the edges of a network with stochastic properties can be estimated cooperatively by individual nodes that retain the delay profiles of the entire network. The proposed algorithm ... -
Efficiency of Supervised Machine Learning Algorithms in Regular and Encrypted VoIP Classification within NFV Environment
(Společnost pro radioelektronické inženýrství, 2020-04)Cloudification of all computing environments is an undergoing process. The process has overpassed the classical Virtual Machines (VM) and Software-Defined Networking (SDN) approach and has moved towards dockerizing, ... -
Experimental Tests and Performance Evaluation of a VHF Data Transceiver Prototype for Operation in the Antarctic Regions
(Společnost pro radioelektronické inženýrství, 2020-04)This paper presents the study and implementation results of a point to point radio data link carried out by the PERMASNOW project Research Team in the Gabriel de Castilla (GdC) Spanish Antarctic Station (Deception Island, ... -
Facial Expression Recognition Based on Multi-dataset Neural Network
(Společnost pro radioelektronické inženýrství, 2020-04)Facial activity is the most powerful and natural means for understanding emotional expression for humans. Recent years, extensive efforts have been devoted to facial expression recognition by using neural networks. However, ... -
A Frequency and Polarization Agile Disc Monopole Wearable Antenna for Medical Applications
(Společnost pro radioelektronické inženýrství, 2020-04)A combined frequency and polarization reconfigurable textile based wearable disc monopole antenna is proposed in this paper. The antenna consists of a disc monopole as the radiator and four PIN diodes for realizing the ... -
Isosceles Triangular Resonator Based Compact Triple Band Quad Element Multi Terminal Antenna
(Společnost pro radioelektronické inženýrství, 2020-04)A triple band quad element multi-input-multi-output (MIMO) antenna is proposed for Bluetooth (2.4 GHz), WLAN (2.5/4.9 GHz) and LTE (3.7 GHz) applications. A compact triangular ring-shaped structure is used as an antenna ... -
Ku-Band High Performance Monopulse Microstrip Array Antenna Based on Waveguide Coupling Slot Array Feeding Network
(Společnost pro radioelektronické inženýrství, 2020-04)A high gain low sidelobe monopulse microstrip array antenna for Ku-band frequency modulated conti-nuous wave (FMCW) radar application is proposed. The design consists of microstrip array radiation front-end and waveguide ... -
Method for Phase Noise Impact Compensation in 60 GHz OFDM Receivers
(Společnost pro radioelektronické inženýrství, 2020-04)This paper presents a method for phase noise impact compensation in 60 GHz OFDM receivers and provides the results of performance evaluation using OFDM PHY parameters defined in the IEEE 802.11ay standard. It is shown that ... -
Microwave Components Realized by Additive Manufacturing Techniques
(Společnost pro radioelektronické inženýrství, 2020-04)This paper presents an overview of the use of additive manufacturing (AM) technologies for the implementation of microwave components. Two major technological solutions, based on the AM of plastic materials, are discussed: ... -
Mitigation of the Effects of Unknown Sea Clutter Statistics by Using Radial Basis Function Network
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper, we investigate feasibility of employing Radial Basis Function (RBF) network into non-coherent detection process, for detection of targets embedded in sea clutter of unknown statistics. We particularly have ... -
A Novel Design of Single Branch Wideband Rectifier for Low-Power Application
(Společnost pro radioelektronické inženýrství, 2020-04)This paper proposes a novel design of single branch wideband rectifier working at low input power level. Both the impedance tuning part and a dual-band matching network are adopted for wideband impedance matching. Theoretical ... -
A Novel Mega-stable Chaotic Circuit
(Společnost pro radioelektronické inženýrství, 2020-04)In recent years designing new multistable chaotic oscillators has been of noticeable interest. A multistable system is a double-edged sword which can have many benefits in some applications while in some other situations ... -
On Segmented Predistortion for Linearization of RF Power Amplifiers
(Společnost pro radioelektronické inženýrství, 2020-04)This paper presents a general survey of digital predistortion (DPD) techniques with segmentation. A comparison of global DPD with two segmented approaches namely Vector-Switched DPD and Decomposed Vector Rotation DPD is ... -
Practically Feasible Closed-Loop Digital Predistortion for VCSEL-MMF-Based Radio-over-Fiber links
(Společnost pro radioelektronické inženýrství, 2020-04)The article demonstrates a novel Digital Predistortion (DPD) architecture for Mobile Front Haul links for the advanced Long-Term Evolution (LTE) and upcoming 5G networks. Precisely, the use of a feedback approximation ... -
Real-Time Triple-Frequency Cycle Slip Detection and Repair Algorithm Based on the Optimal Fixing Probability
(Společnost pro radioelektronické inženýrství, 2020-04)Global Navigation Satellite System (GNSS) is now being speedily expanded to our daily life, but the positioning precision still can hardly meet the demands of many applications, such as approaching landing system on airports. ...