DocumentCode :
2613848
Title :
Adaptive wideband aeroacoustic array processing
Author :
Pham, Tien ; Sadler, Brian M.
Author_Institution :
Army Res. Lab., Adelphi, MD, USA
fYear :
1996
fDate :
24-26 Jun 1996
Firstpage :
295
Lastpage :
298
Abstract :
Incoherent and coherent wideband array processing techniques for aeroacoustic detection and tracking of ground vehicles are contrasted. Experimental results for a circular array are presented, illustrating complexity and performance tradeoffs. Incoherent and coherent MUSIC are used for comparison. Complexity is dominated in both cases by singular value decomposition (SVD) calculation performed M times for the incoherent case and S times for the coherent case, where M is the number of frequency bins and S is the number of look angles. Good results are obtained with the incoherent method for small M provided adequate narrowband SNR is available. The coherent approach is more statistically stable, and S can be reduced by employing a priori coarse direction estimates
Keywords :
acoustic signal detection; acoustic signal processing; adaptive signal detection; adaptive signal processing; aeroacoustics; direction-of-arrival estimation; road vehicles; tracking; DOA estimates; SVD; adaptive wideband aeroacoustic array processing; aeroacoustic detection; aeroacoustic tracking; circular array; coarse direction estimates; coherent MUSIC; coherent wideband array processing; complexity; experimental results; frequency bins; ground vehicles; incoherent MUSIC; incoherent wideband array processing; look angles; narrowband SNR; performance; singular value decomposition; statistically stable method; Array signal processing; Covariance matrix; Frequency estimation; Helicopters; Land vehicles; Narrowband; Sensor arrays; Spectrogram; Vehicle detection; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Statistical Signal and Array Processing, 1996. Proceedings., 8th IEEE Signal Processing Workshop on (Cat. No.96TB10004
Conference_Location :
Corfu
Print_ISBN :
0-8186-7576-4
Type :
conf
DOI :
10.1109/SSAP.1996.534875
Filename :
534875
Link To Document :
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