Temat: beamforming - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wideband beamformer in the frequency domain
Autorzy:: Elminowicz, A.
Powiązania:: https://bibliotekanauki.pl/articles/332683.pdf
Data publikacji:: 2003
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: acoustics
wideband sonar
beamforming
Opis:: In modern high resolution wideband sonars using linear array, beamforming constitutes one of the most difficult problems. This paper presents a new efficient method of beamforming in the frequency domain. Applying fast Fourier transforms: to transfer into the frequency domain - temporal FFT (TFFT); to make spatial filtration spatial FFT (SFFT) and to transfer from the frequency domain - inverse FFT (IFFT), as well as fast convolution in the frequency domain correlating the conjugated and corrected replicas for each beam with picked up samples of SFFT for each frequency and each beam we obtain a processing that is less calculations burdened than other known processing algorithms.
Źródło:: Hydroacoustics; 2003, 6; 235-242
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Development of a high-resolution real-time-capable 3D SONAR camera for deep sea operation
Autorzy:: Ehrhardt, M.
Becker, F. J.
Speicher, D.
Fonfara, H.
Hewener, H.
Degel, C.
Tretbar, S.
Powiązania:: https://bibliotekanauki.pl/articles/332135.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: 2D array
matrix array
3D imaging
beamforming
Opis:: Within this work we present a first experimental setup of a high-resolution real-timecapable 3D sonar camera system for deep sea operation. Since we are currently in the development process, the focus of this work is on the transmission aspects of the camera. Following publications will include the receiving aspects as well as the first phantom reconstructions. The system consists of a 1024 element matrix array antenna, together with a 128 channel beamforming system including a 1:8 multiplexing device for each channel. The camera is supposed to deliver volumetric images within a range of up to 15 m in a deep sea environment up to 6000 m depth. The antenna provides the advantage of an adjustable defocused transmitting sound field. This allows dynamic control of the field of view, and an increase of the image contrast for a specific region.
Źródło:: Hydroacoustics; 2016, 19; 101-110
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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