Wyniki wyszukiwania dla: DIFAR SIGNAL PROCESSING

• MECHANICAL SYSTEMS AND SIGNAL PROCESSING

  Czasopisma

  ISSN: 0888-3270

• SIGNAL PROCESSING

  Czasopisma

  ISSN: 0165-1684 , eISSN: 1872-7557

• IEEE TRANSACTIONS ON SIGNAL PROCESSING

  Czasopisma

  ISSN: 1053-587X , eISSN: 1941-0476

• Implementation of DIFAR Processing in ASW Dipping Sonar

  Publikacja

  • M. Rudnicki

  - Rok 2017

  This paper presents the implementation of the signal processing algorithm used by buoy DIFAR (Directional Frequency Analysis and Recording), that is fully operational on Polish Navy anti-submarine warfare (ASW) helicopters and ships, applied to dipping sonars for detection and tracking of submarines. The development of the DSP algorithms was a part of the modernization of sonars conducted at the Gdansk University of Technology....

• DIGITAL SIGNAL PROCESSING

  Czasopisma

  ISSN: 1051-2004 , eISSN: 1095-4333

• CIRCUITS SYSTEMS AND SIGNAL PROCESSING

  Czasopisma

  ISSN: 0278-081X , eISSN: 1531-5878

• Biomedical Signal Processing and Control

  Czasopisma

  ISSN: 1746-8094 , eISSN: 1746-8108

• Digital structures for high-speed signal processing

  Publikacja

  • M. Czyżak

  - Rok 2013

  The work covers several issues of realization of digital structures for pipelined processing of real and complex signals with the use of binary arithmetic and residue arithmetic. Basic rules of performing operations in residue arithmetic are presented along with selected residue number systems for processing of complex signals and computation of convolution. Subsequently, methods of conversion of numbers from weighted systems to...

• Digital Processing of Frequency–Pulse Signal in Measurement System

  Publikacja

  • D. Świsulski
  • E. Pawłowski
  • M. Dorozhovets

  - Rok 2018

  The work presents the issue of the use of multichannel measurement systems of sensors processing input value to impulse signal frequency. The frequency impulse signal obtained from such sensors is often required to be processed at the same time with a voltage signal which is obtained from other sensors used in the same measurement system. In such case, it is usually necessary to sample the output signals from all sensors in the...

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• A study on signal processing methods applied to hearing aids

  Publikacja

  • B. Kostek
  • K. Kąkol

  - Rok 2016

  This paper presents a short survey on current technology available in hearing aids with a focus on digital signal processing techniques used. First, factors influencing the hearing aid effectiveness are introduced. Then, examples of the present DSP methods and strategies are provided. Also, a description of current limitations of hearing aids and future trends of development are shown. Finally, the notion of computational auditory...

• Efficient signal processing in spectroscopic optical coherence tomography

  Publikacja

  • M. Kraszewski
  • M. Trojanowski
  • M. Strąkowski

  - Rok 2015

  Spectroscopic optical coherence tomography (SOCT) is an extension of a standard OCT technique, which allows to obtain depth-resolved, spectroscopic information on the examined sample. It can be used as a source of additional contrast in OCT images e.g. by encoding certain features of the light spectrum into the hue of the image pixels. However, SOCT require computation of time-frequency distributions of each OCT A-scan, what is...

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• System of speech signal processing and visualisation for linguistic purposes

  Publikacja

  • K. Wojan

  - Archives of Acoustics - Rok 2005

• Using wearable device for biomedical signal acquisition and processing

  Publikacja

  • T. Kocejko
  • A. Giczewska
  • J. Wtorek
  • A. Poliński

  - Rok 2017

  In this paper we present the research conducted on synchronous measurements of biosignals. The experiment was conducted to evaluate the possibility of estimating vital signs based on eye tracking. Method: The eGlasses platform was used for acquisition of ECG, respiration rate, eye and pupil movement and blood pressure. Data were acquired in three 5 min. intervals during which a subject was performing certain tasks. The signals...

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• WSEAS Transactions on Signal Processing

  Czasopisma

  ISSN: 1790-5052

• Journal of Signal and Image Processing

  Czasopisma

  ISSN: 0976-8882

• Foundations and Trends in Signal Processing

  Czasopisma

  ISSN: 1932-8346 , eISSN: 1932-8354

• IEEE SIGNAL PROCESSING LETTERS

  Czasopisma

  ISSN: 1070-9908 , eISSN: 1558-2361

• MULTIDIMENSIONAL SYSTEMS AND SIGNAL PROCESSING

  Czasopisma

  ISSN: 0923-6082 , eISSN: 1573-0824

• Springer Topics in Signal Processing

  Czasopisma

  ISSN: 1866-2609 , eISSN: 1866-2617

• SIGNAL PROCESSING-IMAGE COMMUNICATION

  Czasopisma

  ISSN: 0923-5965 , eISSN: 1879-2677

• Digital signal processing applied to the modernization of Polish Navy sonars

  Publikacja

  • J. Marszal

  - Polish Maritime Research - Rok 2014

  The article presents the equipment and digital signal processing methods used for modernizing the Polish Navy’s sonars. With the rapid advancement of electronic technologies and digital signal processing methods, electronic systems, including sonars, become obsolete very quickly. In the late 1990s a team of researchers of the Department of Marine Electronics Systems, Faculty of Electronics, Telecommunications and Informatics, Gdansk...

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• Accelerometer signal pre-processing influence on human activity recognition

  Publikacja

  • P. Maziewski
  • A. Kupryjanow
  • K. Kaszuba-Miotke
  • A. Czyżewski

  - Rok 2009

  A study of data pre-processing influence on accelerometer-based human activity recognition algorithms is presented. The frequency band used to filter-out the accelerometer signals and the number of accelerometers involved were considered in terms of their influence on the recognition accuracy.

• Acoustic signal processing in passive sonar system with towed array

  Publikacja

  • M. Rudnicki
  • A. Raganowicz
  • J. Schmidt

  - HYDROACOUSTICS - Rok 2008

  W referacie opisano przetwarzanie sygnałów akustycznych w pasywnym systemie hydrolokacyjnym. W pojęciu ''przetwarzanie sygnałów akustycznych'' mieszczą się wszelkie operacje wykonywane na sygnałach analogowych tj. wzmacnianie, filtracja i próbkowanie, jak również operacje na sygnałach cyfrowych uzyskanych w procesie próbkowania. Do operacji cyfrowych wykonywanych w systemie zalicza się synchronizację, konwersję, sortowanie, wytwarzanie...

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• Digital Signal Processing for Hydroacoustic System in Biomimetic Underwater Vehicle

  Publikacja

  • P. Piskur
  • M. Gasiorowski

  - Nase More - Rok 2020

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• Improved method of signal processing used in low-coherent systems

  Publikacja

  • M. Szczerska

  - ACTA PHYSICA POLONICA A - Rok 2008

  W artykule przedstawiono nowe,opracowane metody przetwarzania sygnału w układach niskokoherencyjnych. W układach niskokoherencyjnych z analizą sygnału w dziedzinie czasu zaproponowano wykorzystanie źródeł syntezowanych, natomiast w przypadku układów z przetwarzaniem sygnału w dziedzinie widma zaproponowano metodę opartą na pomiarze przesunięcia widma sygnału pomiarowego. Wyniki przeprowadzonych badań eksperymentalnych zamieszczone...

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• Probe signal processing for channel estimation in underwater acoustic communication system

  Publikacja

  • I. Kochańska
  • J. Schmidt

  - Rok 2017

  Underwater acoustic communication channels are characterized by a large variety of propagation conditions. Designing a reliable communication system requires knowledge of the transmission parameters of the channel, namely multipath delay spread, Doppler spread, coherence time, and coherence bandwidth. However, the possibilities of its estimation in a realtime underwater communication system are limited, mainly due to the computational...

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• Data Compression in Ultrasonic Network Communication via Sparse Signal Processing

  Publikacja

  • B. Zima
  • O. Reyes Márquez
  • M. Mohammadgholiha
  • J. Moll
  • L. Marchi De

  - Rok 2022

  This document presents the approach of using compressed sensing in signal encoding and information transferring within a guided wave sensor network, comprised of specially designed frequency steerable acoustic transducers (FSATs). Wave propagation in a damaged plate was simulated using commercial FEM-based software COMSOL. Guided waves were excited by means of FSATs, characterized by the special shape of its electrodes, and modeled...

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• Usage of the Gstreamer framework for generation, analysis, processing and visualization of sonar signal

  Publikacja

  • K. Czarnecki
  • D. Dąbrowski

  - HYDROACOUSTICS - Rok 2015

  In this paper a novel method of the bearing estimation in a passive sonar system with a towed array is introduced. The classical approach of the bearing estimation based on the spatial spectrum is extended by using the synchrosqeezing method that is a part of the reassignment method introduced by Kodera et al. The usage of this method leads to the precise bearing estimation. The proposed method requires a relatively small amount...

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• Guided Waves in Steel Rails – Experimental Works and Wavelet Signal Processing

  Publikacja

  • M. Rucka
  • K. Wilde

  - Rok 2007

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• Guided waves in steel rails - experimental works and wavelet signal processing

  Publikacja

  • M. Rucka
  • K. Wilde

  - Key Engineering Materials - Rok 2007

  W artykule zaprezentowano analizę falkową pomierzonych eksperymentalnie fal sprężystych wzbudzanych w szynach kolejowych.

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• EURASIP Journal on Advances in Signal Processing

  Czasopisma

  ISSN: 1687-6172 , eISSN: 1687-6180

• EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING

  Czasopisma

  ISSN: 1110-8657

• APSIPA Transactions on Signal and Information Processing

  Czasopisma

  ISSN: 2048-7703

• Sampling Theory in Signal and Image Processing

  Czasopisma

  ISSN: 1530-6429

• Foundations in Signal Processing, Communications and Networking

  Czasopisma

  ISSN: 1863-8538 , eISSN: 1863-8546

• IEEE Open Journal of Signal Processing

  Czasopisma

  eISSN: 2644-1322

• Intelligent Audio Signal Processing − Do We Still Need Annotated Datasets?

  Publikacja

  • B. Kostek

  - Rok 2022

  In this paper, intelligent audio signal processing examples are shortly described. The focus is, however, on the machine learning approach and datasets needed, especially for deep learning models. Years of intense research produced many important results in this area; however, the goal of fully intelligent signal processing, characterized by its autonomous acting, is not yet achieved. Therefore, a review of state-of-the-art concerning...

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• A digital implementation of the PSK transmitter and receiver as multirate algorithms of the digital signal processing

  Publikacja

  • K. Świder
  • M. Papaj

  - Rok 2011

  In this paper designs of the transmitter and the receiver of PSK signals as three-rate algorithms of the digital signal processing are described. Additionally we show the examples of the transmitter and the receiver of the following signals: BPSK, QPSK. We discussed also an influence of the cascade of the shaping filter and the receiving filter on the intersymbol interference in the received complex envelope.W pracy opisano projektowanie...

• Influence of accelerometer signal pre-processing and classification method on human activity recognition

  Publikacja

  • A. Kupryjanow
  • K. Kaszuba-Miotke
  • A. Czyżewski

  - Elektronika : konstrukcje, technologie, zastosowania - Rok 2010

  A study of data pre-processing influence on accelerometer-based human activity recognition algorithms is presented. The frequency band used to filter-out the accelerometer signals and the number of accelerometers involved were considered in terms of their influence on the recognition accuracy. In the test four methods of classification were used: support vector machine, decision trees, neural network, k-nearest neighbor.

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• Seafloor characterisation using multibeam sonar echo signal processing and image analysis

  Publikacja

  • Z. Łubniewski
  • A. Stepnowski
  • A. Chybicki

  - HYDROACOUSTICS - Rok 2010

  The authors propose the approach to multibeam seafloor characterisation which relies on the combined, concurrent use of two different techniques of multibeam sonar data processing. The first one is based on constructing the grey-level sonar images of seabed using the echoes received in the consecutive beams. Then, the parameters describing the local region of sonar image, namely, the local standard deviation of a grey level, and...

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• Combined method of multibeam sonar signal processing and image analysis for seafloor classification

  Publikacja

  • A. Stepnowski
  • Z. Łubniewski

  - Rok 2011

  The combined approach to seafloor characterisation was investigated. It relies on calculation of several descriptors (parameters) related to seabed type using three types of multibeam sonar data obtained during seafloor sensing: 1) the grey-level sonar images (echograms) of seabed, 2) the 3D model of the seabed surface which consists of bathymetric data, 3) the set of time domain bottom echo envelopes received in the consecutive...

• Measurements of Two-phase Flows in Pipelines Using Radioisotopes and Statistical Signal Processing

  Publikacja

  • R. Hanus
  • M. Zych
  • A. Golijanek-Jędrzejczyk

  - Rok 2022

  This paper presents an application of radiotracers and gamma absorption method in two-phase flow measurements in pipelines. Two different methods were implemented to analysis of acquired signals. Investigated methods are based on the cross-correlation function and the phase of the cross-spectral density distribution. The examples presented in the article illustrate the application of the radioisotopes to evaluation of liquid-gas...

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• International Journal of Signal Processing, Image Processing and Pattern Recognition

  Czasopisma

  ISSN: 2005-4254

• Lamb wave based structural damage detection using cointegration and fractal signal processing

  Publikacja

  • P. Dao
  • W. Staszewski
  • P. B. Dao

  - Mechanical Systems and Signal Processing - Rok 2014

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• Impact of digital signal processing on FOC current feedback in high-speed PMSM drive

  Publikacja

  • L. Jarzębowicz
  • M. Gutten

  - Rok 2019

  In applications where size and weight of the electric motor are among major design concerns, Permanent Magnet Synchronous Motors (PMSMs) with wide operational speed-range are commonly preferred. Due to limited inverter switching frequency, high-speed operation of a drive results in a low ratio between the switching frequency and the fundamental frequency of motor voltage. Such operating conditions have been recently identified...

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• Digital processing of pulse signal from light-to-frequency converter under dynamic condition

  Publikacja

  • E. Pawlowski

  - Rok 2014

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• Signal Processing in the Investigation of Two-phase Liquid-gas Flow by Gamma-ray Absorption

  Publikacja

  • R. Hanus
  • M. Zych
  • M. Jaszczur
  • A. Szlachta
  • A. Golijanek-Jędrzejczyk

  - Rok 2019

  n this paper, the use of the gamma-absorption method applied in the investigation of the two-phase liquid-gas flow in the pipeline is described. An example of its application to the air transported by water in a horizontal pipeline is evaluated. In the measurements, Am-241 radioactive sources and probes with Nal (Tl) scintillation crystals have been used. The signals from the radiometric set were used to determine the velocity...

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• seafloor characterisation combined approach using multibeam sonar echo signal processing and image analysis

  Publikacja

  • Z. Łubniewski
  • A. Stepnowski
  • A. Chybicki

  - Rok 2010

  The authors propose the approach to seafloor characterisation which relies on the combined, concurrent use of two different techniques: (i) multibeam sonar image analysis and (ii) multibeam seabed echoes processing. The first technique is based on constructing the grey-level sonar images of the seabed extracted from the echoes received in the consecutive soundings. Then, the set of parameters describing the local region of sonar...

• International Journal of Image, Graphics and Signal Processing

  Czasopisma

  ISSN: 2074-9074

• IEE PROCEEDINGS-VISION IMAGE AND SIGNAL PROCESSING

  Czasopisma

  ISSN: 1350-245X