Wyniki wyszukiwania dla: 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

• 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...

• 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

• DIGITAL SIGNAL PROCESSING

  Czasopisma

  ISSN: 1051-2004 , eISSN: 1095-4333

• 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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• Digital Signal Processing for Hydroacoustic System in Biomimetic Underwater Vehicle

  Publikacja

  • P. Piskur
  • M. Gasiorowski

  - Nase More - Rok 2020

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

  Publikacja

  • M. Rucka
  • K. Wilde

  - Rok 2007

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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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• CIRCUITS SYSTEMS AND SIGNAL PROCESSING

  Czasopisma

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

• 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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• 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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• 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...

• 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...

• 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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• Biomedical Signal Processing and Control

  Czasopisma

  ISSN: 1746-8094 , eISSN: 1746-8108

• 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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• 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...

• Fully Tunable Analog Biquadratic Filter for Low-Power Auditory Signal Processing in CMOS Technologies

  Publikacja

  • W. Jendernalik
  • J. Jakusz

  - Electronics - Rok 2024

  A novel Gm-C structure of a second-order continuous-time filter is proposed that allows for the independent control of the filter’s natural frequency (ω0) and quality factor (Q). The structure consists of two capacitors and four transconductors. Two transconductors together with the capacitors form a lossless second-order circuit with tunable ω0. The other two transconductors form a variable gain amplifier (VGA) which realizes...

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• WSEAS Transactions on Signal Processing

  Czasopisma

  ISSN: 1790-5052

• 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

• EVALUATION OF LIQUID-GAS FLOW IN PIPELINE USING GAMMA-RAY ABSORPTION TECHNIQUE AND ADVANCED SIGNAL PROCESSING

  Publikacja

  • R. Hanus
  • M. Zych
  • V. Mosorov
  • A. Golijanek-Jędrzejczyk
  • M. Jaszczur
  • A. Andruszkiewicz

  - Metrology and Measurement Systems - Rok 2021

  Liquid-gas flows in pipelines appear in many industrial processes, e.g. in the nuclear, mining, and oil industry. The gamma-absorption technique is one of the methods that can be successfully applied to study such flows. This paper presents the use of thegamma-absorption method to determine the water-air flow parameters in a horizontal pipeline. Three flow types were studied in this work: plug, transitional plug-bubble,...

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• MATCHED FILTER APPROACH FOR MICROSEISMIC SIGNAL PROCESSING OF REAL DATA FROM EAST POMERANIA SHALE GAS

  Publikacja

  • M. Kmieć
  • M. Antoszkiewicz
  • R. Jankowski
  • M. Szkodo

  - Rok 2017

  The microseismic monitoring is a method of monitoring of fracture propagation during hydraulic fracturing (HF)process. An array of several hundred geophones is placed on the surface to record little ground tremors induced by fracturing process. Filtration and summation of signals from geophones is essential to identify and locate fracturing events from underground. Authors propose a method of matched filtering, that is usually...

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• Efficient FPGA Implementation of an RFIR Filter Using the APC–OMS Technique with WTM for High-Throughput Signal Processing

  Publikacja

  • K. Satish Reddy
  • S. Madhavan
  • P. Falkowski-Gilski
  • P. B. Divakarachari
  • A. Mathiyalagan

  - Electronics - Rok 2022

  Nowadays, Finite Impulse Response (FIR) filters are used to change the attributes of a signal in the time or frequency domain. Among FIR filters, a reconfigurable filter has the advantage of changing the coefficient in real-time, while performing the operation. In this paper, the Anti-Symmetric Product Coding (APC) and Odd Multiple Storage (OMS) modules are utilized to implement the reconfigurable FIR filter (RFIR–APC–OMS). Herein,...

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• Digital Signal Processing

  Kursy Online

  • T. Stefański

• <title>Measurements of SIMCON 3.1 LLRF control signal processing quality for VUV free-electron laser FLASH</title>

  Publikacja

  • R. Pietrasik
  • W. Giergusiewicz
  • W. Jalmuzna
  • K. Pozniak
  • R. Romaniuk
  • S. Simrock
  • R. S. Romaniuk

  - Rok 2006

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• System przetwarzania i wizualizacji sygnału mowy dla potrzeb lingwistycznych = System of speech signal processing and visualisation of the results

  Publikacja

  • Z. Wojan
  • W. Lis
  • K. Wojan

  - Rok 2005

  W artykule przedstawiono sposób przetwarzania i wizualizacji sygnału mowy w formie prostego w obsłudze i relatywnie niedrogiego urządzenia do nagrywania sygnału akustycznego oraz przetwarzania cyfrowego wyselekcjonowanych fragmentów i wizualizacji uzyskanych rezultatów przekształceń. Zastosowano do tego celu komputer z kartą dźwiękową. Przetwarzanie cyfrowe oraz wizualizacja dokonywana była w oparciu o program MATLAB bezpośrednio...

• EURASIP Journal on Advances in Signal Processing

  Czasopisma

  ISSN: 1687-6172 , eISSN: 1687-6180

• EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING

  Czasopisma

  ISSN: 1110-8657

• Foundations in Signal Processing, Communications and Networking

  Czasopisma

  ISSN: 1863-8538 , eISSN: 1863-8546

• IEEE Open Journal of Signal Processing

  Czasopisma

  eISSN: 2644-1322

• System przetwarzania i wizualizacji sygnału mowy dla potrzeb lingwistycznych [A system of speech signal processing and visualisation for linguistic purposes]

  Publikacja

  • K. Wojan

  - Rok 2005

• Contactless Hearing Aid for Infants Employing Signal Processing Algorithms. [Bezkontaktowy aparat słuchowy dla niemowląt wykorzystujący algorytmy przetwarzania sygnału]

  Publikacja

  • M. Kulesza
  • P. Dalka
  • B. Kostek

  - Rok 2006

  Zaprojektowany bezkontaktowy aparat słuchowy umiejscawiany jest w łóżeczku niemowlęcia. Aparat składający się z matrycy 4 mikrofonów oraz prototypowej karty z procesorem DSP pracuje w polu swobodnym. Przetworzony sygnał mowy emitowany jest z wykorzystaniem miniaturowych głośników. Opracowane algorytmy pozwalają na elminację akustycznych sprzężeń zwrotnych, które mogą wystepować ze względu na niewielką odległość mikrofonów od głośników...

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

  Czasopisma

  ISSN: 2005-4254

• International Journal of Image, Graphics and Signal Processing

  Czasopisma

  ISSN: 2074-9074

• IEE PROCEEDINGS-VISION IMAGE AND SIGNAL PROCESSING

  Czasopisma

  ISSN: 1350-245X

• IEEE Journal of Selected Topics in Signal Processing

  Czasopisma

  ISSN: 1932-4553 , eISSN: 1941-0484