Wideband beamformer in the frequency domain

• Autorzy: Elminowicz A.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

acoustics; wideband sonar; beamforming

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2003
• Tom: Vol. 6
• Strony: 235--242
• Opis fizyczny: Bibliogr. 3 poz., rys., tab.

Twórcy

autor

Elminowicz A.

• Marine Technology Centre, Gdynia, Poland

Bibliografia

• 1. B. Maranda, "Efficient Digital Beamforming in the Frequency Domain", J.Acoust.Soc.Am. 86(5), 1813-1819, November 1989.
• 2. L.J. BIuestin, A Linear Filtering Approach to the Computation of the Discrete Fourier Transformation", IEEE Trans.Audio Electroacoust., VoI 18,451-455,1970.
• 3. http//www.curtistech.co.uk/papers/beamformer.pdf.