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IEEE journal of oceanic engineering, 1993-01, Vol.18 (1), p.15-24
1993

Details

Autor(en) / Beteiligte
Titel
Spatial smoothing and minimum variance beamforming on data from large aperture vertical line arrays
Ist Teil von
  • IEEE journal of oceanic engineering, 1993-01, Vol.18 (1), p.15-24
Ort / Verlag
New York, NY: IEEE
Erscheinungsjahr
1993
Link zum Volltext
Quelle
IEEE Electronic Library (IEL)
Beschreibungen/Notizen
  • Various approaches to the beamforming of data from large aperture vertical line arrays are investigated. Attention is focused on the conventional beamforming problem where the angular power spectrum is estimated, in this case by the adaptive minimum variance processor. The data to be processed are 200 Hz CW transmissions collected at sea by a 900 m vertical line array with 120 equally spaced sensors. Correlated multipath arrivals result in signal cancellation for the adaptive processor, and spatial smoothing techniques must be used prior to beamforming. The processing of subapertures is proposed. Full aperture and subaperture processing techniques are used on the 200 Hz data. Multipath arrivals are found to illuminate only parts of the array, thus indicating that the wavefield can be highly inhomogeneous with depth.< >

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