2020/1
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Recent Submissions
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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, ... -
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 ... -
Reliable Estimation of the Intra-Voxel Incoherent Motion Parameters of Brain Diffusion Imaging Using θ-Teaching-Learning-Based Optimization
(Společnost pro radioelektronické inženýrství, 2020-04)Intra-voxel incoherent motion (IVIM) imaging can characterize diffusion and perfusion of tissues. Traditionally, the least-square method has been used to determine IVIM parameters consisting of pure diffusion coefficient ... -
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 ... -
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, ... -
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 ... -
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 ... -
Two-Dimensional Underdetermined DOA Estimation of Quasi-Stationary Signals using Parallel Nested Array
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper, a two dimensional underdetermined direction of arrival estimation (DOA) of quasi-stationary signals using a parallel nested array structure is investigated. The quasi-stationary signals have the statistical ... -
Speech Bandwidth Extension Using DWT-FFT-Based Data Hiding
(Společnost pro radioelektronické inženýrství, 2020-04)A novel transform-domain speech bandwidth extension algorithm is proposed to transmit information about the missing speech frequencies over a hidden channel, i.e., the related encoded spectral envelope parameters are hidden ... -
Smart-Mesh Strategy in DGTD Method for Partially Filled Cavity with Uncertain Interface Parameters
(Společnost pro radioelektronické inženýrství, 2020-04)To achieve high quality localization of nodes, a smart-mesh strategy is employed in the discontinuous Galerkin time-domain (DGTD) simulation. The strategy is able to adjust adaptively the nodes defined on the unstructured ... -
XGB Model : Research on Evaporation Duct Height Prediction Based on XGBoost Algorithm
(Společnost pro radioelektronické inženýrství, 2020-04)Evaporation duct is a specific atmospheric structure at sea, which has an important influence on the propagation path of electromagnetic waves (EW). Considering the limit of existing evaporation duct height (EDH) prediction ... -
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) ... -
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 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 ... -
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 Variable Step-size CLMS Algorithm and Its Analysis
(Společnost pro radioelektronické inženýrství, 2020-04)In this paper, a hyperbolic tangent variable step-size convex combination of the least mean square (HTVSCLMS) algorithm is proposed and analyzed. This work avoids the compromise between the convergence speed and the ... -
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 ... -
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. ... -
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 ... -
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, ...
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