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Line-array beamforming using linear prediction for aperture interpolation and extrapolation

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2 Author(s)
Swingler, D.N. ; Div. of Eng., Saint Mary''s Univ., Halifax, NS, Canada ; Walker, R.S.

It is demonstrated that linear prediction can be successfully utilized in conjunction with otherwise conventional narrow-band line-array beamforming for aperture extrapolation (APEX), where there are significant SNR (signal-to-noise ratio) and resolution advantages compared to the conventional approach, aperture interpolation, where faulty sensor data are replaced, and a combined technique (ALPINEX). The performance of all three methods is investigated in connection with both simulated and real data. The APEX technique is shown to be amenable to a simple theoretical treatment. Further, the approach is demonstrated to offer a practical performance comparable to the well-known high-resolution technique, MUSIC, when the observation time is short.<>

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:37 ,  Issue: 1 )