Yazar "Bereketli, Alper" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    A Comparative Study on the Performances of the DF Techniques Using a Single Acoustic Vector Sensor
    (Ieee, 2014) Gunes, Ahmet; Guldogan, Mehmet B.; Bereketli, Alper
    Underwater acoustic vector sensors (AVS) are devices which can measure scalar pressure and three dimensional acceleration or particle velocity with only one sensor. Direction of an acoustic target can be estimated by these four measured scalar values. Techniques based on either closed-form expressions or beamforming can be carried out for direction finding by using the axial projections of the gradient vector of the pressure from the target. In this work, the performances of direction of arrival (DOA) estimation techniques for a single underwater AVS are analyzed in detail under the effects of various error sources such as imperfect projections and ambient noise.
  • Küçük Resim Yok
    Öğe
    Analysis of Direction Finding Techniques Using a Single Underwater Acoustic Vector Sensor
    (Ieee, 2014) Gunes, Ahmet; Bereketli, Alper; Guldogan, M. Burak
    Underwater acoustic vector sensors (AN'S) are devices which can measure scalar pressure and three dimensional acceleration or particle velocity with only one sensor. Bearing estimation for the target can be accomplished by these four measured scalar values. Algorithms based on closed-form expressions or beamforming can be carried out for direction finding by using the axial projections of the gradient vector of the pressure from the target. In this work, the performances of direction of arrival estimation algorithms for underwater acoustic vector sensors are analyzed in detail under the effects of various error sources such as imperfect projections and ambient noise.
  • Küçük Resim Yok
    Öğe
    Experimental Results for Direction of Arrival Estimation with a Single Acoustic Vector Sensor in Shallow Water
    (Wiley, 2015) Bereketli, Alper; Guldogan, Mehmet B.; Kolcak, Taner; Gudu, Tamer; Avsar, Ahmet Levent
    We study the performances of several computationally efficient and simple techniques for estimating direction of arrival (DOA) of an underwater acoustic source using a single acoustic vector sensor (AVS) in shallow water. Underwater AVS is a compact device, which consists of one hydrophone and three accelerometers in a packaged form, measuring scalar pressure and three-dimensional acceleration simultaneously at a single position. A very controlled experimental setup is prepared to test how well-known techniques, namely, arctan-based, intensity-based, time domain beamforming, and frequency domain beamforming methods, perform in estimating DOA of a source in different circumstances. Experimental results reveal that for almost all cases beamforming techniques perform best. Moreover, arctan-based method, which is the simplest of all, provides satisfactory results for practical purposes.