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This paper presents the concept of using a multisensor radio-frequency (RF) system for the detection and tracking of the ball and players in ball sports. The system will be designed as a supporting system for video based tracking systems. The system will consist of two subsystems using RFID and radar technology to detect the position and velocity parameters of the players and ball in sports such as...
Novel human gesture recognition and classification technique is suggested and experimentally studied. Suggested strategy is based on exploiting the interactions of human gestures with high-frequency electromagnetic field. Extracting of classification features contained in the wireless radio signal modulated by human gestures is proposed by utilizing bispectrum-based processing of the signal envelope...
Abdominal fetal electrocardiogram monitoring is a technique for obtaining information about fetus well-being during pregnancy by analyzing electrical signals from multi-channel recordings on the mother body surface. Of particular interest are the fetal heart rate and the shape of the PQRST complex, which are indicators of the degree of fetal distress. In this paper, we present a technique (hardware...
In this paper the problem of estimation of extended lung ventilation parameters during non-contact monitoring using video camera is considered. Nowadays non-contact systems for respiration monitoring allow estimate the respiration rate only. The approach, that allows to estimate duration of inhale, exhale and their ratio using video stream from the upper torso, is proposed. The obtained parameters...
This work describes an algorithm to help in the identification of pathologically affected voices. Based on inverse linear prediction filter (LPC) and discrete wavelet transform (DWT), this method can be used in conjunction with other classifiers in order to improve them, by the addition of the new parameter we propose, DWT-RMS. Using no association with other methods, DWT-RMS gives quantitative evaluation...
Image over-segmentation, as a pre-processing step of image segmentation, splits the input image into superpixels. Those are small compact regions with irregular shapes. The majority of existing methods for texture feature extraction are not suitable for arbitrarily shaped regions. Therefore, only color information can be used to classify and merge superpixels to create final image segmentation. We...
This paper focuses on real=time image recognition in video sequences A novel algorithm designed to be used specifically for finger spelling alphabet is introduced along with relevant qualitative comparison to current state of the art. The proposed concept introduces a new image feature selection technique used in comparation process, which significantly improves the recognition of finger spelling...
In this paper the possibility to extract information about drops vibration and deformation using the polarization characteristics of electromagnetic wave and receiving antennas are considered. The mathematical expression that demonstrates the impact of drop shape deformation and vibration onto the field reflected from liquid hydrometeor assemble and received by the antenna with arbitrary polarization...
There is a requirement for waveform orthogonality on dual or multiple channel radars to avoid cross-channel interferences. It is additionally favored that dual-channel polarization-orthogonal radars are capable of estimating target Polarization Scattering Matrix (PSM) elements simultaneously, that is within one Pulse/sweep/frame Repetition Interval (PRI). The current solution for simultaneity in Linear...
In this paper localization using UWB positioning system and an inertial unit containing a single accelerometer is considered. The main part of the paper describes a novel algorithm for person localization. The algorithm is based on modified Extended Kalman Filter and utilizes TDOA (Time Difference of Arrival) results obtained from UWB system and results of acceleration measurement performed by the...
The modern ground Instrument Landing Systems for air traffic service are analyzed. Recommendations about possible variants of those systems control processes improvement were proposed in the paper. Interconnection between control errors, control and adjusting operations indexes, probabilities of failure-free operation and its total influence on the Instrument Landing Systems technical state control...
The paper deals with the problem of synthesis and analysis for procedures of reliability parameters estimation in case of radioelectronic devices technical state deterioration. The synthesis problem was solved on the basis of the maximum likelihood method. The analysis problem was solved using analytical calculations and based on statistical simulation.
In the paper, the traditional Displaced Phase Center Antenna (DPCA) combines with the triangular wave FMCW to detect the moving targets, which could make the single-channel equivalent to the dual-channel. Without requiring any additional system instruments, cost and light, the miniaturization Ka FMCW SAR system could own the moving target detection function. This method is simple and applicable. In...
In this work, the blink detection algorithm for an embedded closed-loop system for a restoration of facial muscle functions in the case of unilateral facial nerve paralysis is proposed. The algorithm is based on a real-time assessment of a spectral power of the electromyographic signal, which is recorded from the orbicularis oculi muscle with implanted needle electrodes on the healthy side of the...
This paper describes the experiment of analyzing MRI images of the brain of patients with Alzheimer's disease (AD), mild cognitive impairment (MCI) and normal control (NC). The aim of this research is to use new methods of extracting features from MRI images and selecting the most relevant features. The values of cortical thickness in regions of interest are used as a features for MRI images. The...
Afternoon sleepiness is a routine physiological phenomenon and it reduces arousal level, performance, and so on. It has been cleared and is often said that taking a short nap is effective to cancel the sleepiness. Sleep stage 2 is one of important factors on sleeping especially in short naps. Also, sleep spindles are important hallmarks of EEG in sleep stage 2. Therefore, it is necessary to find a...
The present study proposes new method for epileptic seizure prediction based on heart rate variability (HRV) analysis and one-class support vector machines (SVM) technique. Methods: Excessive neural activity in preictal period affects not only brain activity, but also autonomic nervous system, that affects HRV. The proposed method distinguishes eight features, analyzes matrix of eigenvalues and eigenvectors,...
In this paper results of research on RTK (Real Time Kinematic) technique used to develop small and lightweight receiver of GNSS (Global Navigation Satellite System) signals is presented. Experiments with such receivers show that they are able to deliver good quality position estimation of micro aerial vehicles in 3D space during a flight. The standard deviation of the position measurement is less...
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