Search results for: ARRAY%20PROCESSING

• Array

  Journals

  eISSN: 2590-0056

• Acoustic signal processing in passive sonar system with towed array

  Publication

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

  - HYDROACOUSTICS - Year 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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• Detection and Mitigation of GPS Spoofing Based on Antenna Array Processing

  Publication

  • J. Magiera
  • R. Katulski

  - Journal of Applied Research and Technology - Year 2015

  In this article authors present an application of spatial processing methods for GPS spoofing detection and mitigation. In the first part of this article, a spoofing detection method, based on phase delay measurements, is proposed. Accuracy and precision of phase delay estimation is assessed for various qualities of received signal. Spoofing detection thresholds are determined. Efficiency of this method is evaluated in terms of...

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• Performance evaluation of GPS anti-spoofing system based on antenna array processing

  Publication

  • J. Magiera
  • R. Katulski

  - Year 2016

  This article concerns the problem of detection and mitigation of spoofing attacks in Global Navigation Satellite Systems. First, background information about spoofing and its possible countermeasures is provided. Next, concept of a novel GPS anti-spoofing system based on antenna array processing is presented and implementation of prototype of this system is described. The third section outlines the performance evaluation of proposed...

• Sample processing for DNA chip array-based analysis of enterohemorrhagic Escherichia coli (EHEC)

  Publication

  • P. Basselet
  • G. Wegrzyn
  • S. Enfors
  • M. Gabig-Ciminska

  - Microbial Cell Factories - Year 2008

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• The Processing Procedure for the Interpretation of Microseismic Signal Acquired from a Surface Array During Hydraulic Fracturing in Pomerania Region in Poland

  Publication

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

  - Year 2017

  Hydraulic fracturing is a procedure of injecting high pressure fluid into the wellbore in order to break shell rock and facilitate gas flow. It is a very costly procedure and, if not conducted properly, it may lead to environmental pollution. To avoid costs associated with pumping fluid outside the perspective (gas rich) zone and improve one’s knowledge about the reservoir rock, microseismic monitoring can be applied. The method...

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• Passive sonar with cylindrical array

  Publication

  • J. Marszal
  • W. Leśniak
  • R. Salamon
  • A. Jedel
  • K. Zachariasz

  - Archives of Acoustics - Year 2006

  Artykuł prezentuje sposób wykorzystania sonaru aktywnego z anteną cylindryczną do nasłuchu pasywnego podwodnych źródeł dźwięku. Wykazano, że wykrycie źródła dźwięku i określenie jego namiaru może być zrealizowane bez zmian konstrukcji odbiornika. Wymagana jest jedynie zmiana algorytmów przetwarzania sygnałów w beamformerze. Wykazano również, że w celu zwiększenia dokładności namiaru można zastosować wysokorozdzielcze metody estymacji...

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• Multifrequency Wideband Sonar Array

  Publication

  • A. Eliminowicz
  • W. Lis
  • L. Zajączkowski

  - HYDROACOUSTICS - Year 2012

  This paper describes of new approach to Multifrequency Wideband Arrays (MWA),applied piezocomposite technologies of the array elements. MWA operating in transmitting(Tx) and receiving (Rx) mode on two or three bands, requires state-of-the-art technology andefficient array designing than conventional array in which separate arrays for every band oreven separate Tx and Rx transducers/arrays are used. The new piezocomposite elements...

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• High-precision bearing estimation for active sonar with cylindrical array performed by interpolated array transformation

  Publication

  • W. Leśniak

  - HYDROACOUSTICS - Year 2016

  The article presents a method for improving the accuracy of bearing in multibeam sonar with a cylindrical array. The antenna’s non-linear shape and the resulting non-uniform sampling of the signal in space, mean that known methods of high-resolution spectral analysis cannot be used. In order to apply an algorithm from this group, a linear virtual antenna must be produced. The paper presents a technique of mapping a cylindrical...

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• Physicochemical Problems of Mineral Processing

  Journals

  ISSN: 1643-1049 , eISSN: 2084-4735