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Research in emotional speech recognition is generally focused on analysis of a set of primary emotions. However, it is clear that spontaneous speech, which is more intricate comparing to acted out utterances, carries information about emotional complexity or degree of their intensity. This research refers to the theory of Robert Plutchik, who suggested the existence of eight primary emotions. All...
In radars, the performance of signal detectors is seriously degraded by arrival of impulse noise that extremely worsens their detectability characteristics. There are many papers, in which different Constant False Alarm Rate (CFAR) detectors have been analyzed in the presence of randomly arriving impulse interference described as Bernoulli pulse sequences. In this paper, the randomly arriving impulse...
The paper describes an X-band receiver constructed from Commercial Off-The-Shelf (COTS) elements that was used to capture a radar signal transmitted by the TerraSAR-X satellite. The motivation was to use recorded waveforms to perform ground-based imaging of the surrounding area. The paper describes the motivation, receiver setup and the results of the measurement campaign.
This article falls within the field of speech processing — speech synthesis. The content is focused on phonetic transcription of the text. The transcript rules as well as dictionary of phonetic transcriptions are important tools for the phonetic transcription. The article deals with the transcript rules called LTS (Letter-To-Sound). Automatically generated LTS rules are presented in form of binary...
The aim of the paper is to shown a construction of an autonomous vehicle using fuzzy logic. The vehicle was designed as line-follower. The task of control system is to move a vehicle in such way that it follows a black line marked on the white floor. The vehicle consists of two wheels in the front and a support at the back. The system control is based on input signals from six optical sensors measuring...
The signal detection nonparametric algorithm is suggested. It based on the use of the nonlinear transform based on the kernel estimate of the cumulative distribution function. Atomic functions are used as an estimate and transform kernels.
In conjunction with the problem of the target selection on a clutter background with quasi-continuous radiation, the analysis of the spatial radar signal processing is made. The analysis is made for a case of non-isotropic array elements. The calculation results of the optimized receiving antenna pattern and the attained signal-to-noise ratio for the confirmation of the efficiency of the cylindrical...
In this paper the possibility of SpO2 signal preprocessing is studied and the influence of signal smoothing on the alarm level and duration is investigated. Dyadic wavelet transform was applied to SpO2 signal and the reconstruction for different levels using approximation part was performed, considering the time duration of wavelet and scaling functions. 68 signals from PhysioNet MIMIC II database...
The innovation processes are connected with uncertainty and considerable financial risk. No matter whether a new product, technology or methodology is promoted, there are several stages that the innovation passes. The first three are connected with venture investments and the final — with eventual good profits. It is possible that the outcome is a failure, which is normal for any venture enterprise...
This paper presents a method of modern deep machine learning and its application in dimension reduction and lossy compression. Deep belief networks (or DBN's), first proposed by Yoshua Bengio, are hierarchic, stochastic, neural networks with appropriate architecture and dedicated training algorithms. They are composed of layers, each one of which is a restricted Boltzmann machine (or RBM). There exists...
The aim of the work presented in this paper was to construct a passive radar demonstrator that uses transmitters of DVB-T (Digital Television Broadcasting — Terrestrial). The system uses commercially available, PXI-based (PCI eXtensions for Instrumentation) system including four-channel digitizer and an FPGA (Field Programmable Gate Array). The key processing step for this task is calculation of crossambiguity...
The calculations of scattering characteristics of polydisperse medium with ellipsoidal raindrops are considered. The novelty of the approach used is that differential radar cross section (DRCS) of ellipsoidal drops have been calculated in the framework of the Pruppacher model in the case of double-frequency sounding. The DRCS is studied in details at 8 mm, 3cm and 10 cm wavelengths according to their...
This paper presents an usage of a sidelobe canceller technique with one auxiliary antenna and a lattice joint process estimator as a jammer filter. System performance is analyzed on the example of a recorded real radar signal with one active jammer, and multiple flying and stationary objects.
NCTI (Non-Cooperative Target Identification) in a monostatic radar configuration has been investigated extensively within the past years but classification in a bi-/ multistatic configuration does not seem to have obtained much attention to date. To have a good data basis to work on this problem we conducted bistatic turntable measurements of five distinct ground targets at Fraunhofer FHR. The bistatic...
In radars, complex signals arise naturally as a result of a quadrature demodulation or Fourier transform. Also, the Doppler spectrum is not an even function of frequency and the Doppler signal is thus naturally complex. Random complex radar signals used to be automatically assumed to be circular. As a result, most of signal processing algorithms (such as detection and estimation) were derived for...
Algorithm of radiometer signal processing is considered for reconstruction of water content profile in clouds. The procedure of signal processing is described and results of numerical simulation of brightness temperature are presented at 8 mm and 32 mm wavelengths. The study is performed for different cloud thickness and various types of water content profiles. It was shown that water content profile...
The design and realization of non-invasive directional coupler for Cellflex cables is presented. The new idea of the coupler is presented in which the coupled line is separated by half-wavelength long connecting lines and signal from the main line is picked up at two points only. The designed parameters are compared with measurements showing good agreement.
The present paper is an attempt for acceptable balance between theoretical research, computer simulations and experiments on real industrial objects. Several rules and recommendations are retrieved from the obtained results about the exploitation domains of certain classes of industrial metallurgical objects. The practical trend of the presented results is contained in our efforts for a comparative...
In this article we discuss certain aspects of compressed sensing application in the context of radar systems. We thoroughly analyze the framework of the paper [4] and propose the directions of generalizations. In particular we consider a rectangle time frequency grid of non-prime type, non-Allotop carrier signals of the length non-equal to the length of time grid, incoherent carrier and grid frequency...
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