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Technical Program

Paper Detail

Paper:	SAM-P4.10
Session:	Sensor Array Processing
Time:	Thursday, May 18, 14:00 - 16:00
Presentation:	Poster
Topic:	Sensor Array and Multichannel Signal Processing: Inverse methods
Title:	COMPARISON OF A DIFFRACTING AND A NON-DIFFRACTING CIRCULAR ACOUSTIC ARRAY
Authors:	James Carneal, Marty Johnson, Philip Gillett, Virginia Tech, United States
Abstract:	Localization of acoustic sources has been an area of research starting primarily with underwater acoustics. Recently, localization of sources in air has become a topic of interest for automatic detection, surveillance and tracking for military applications. This paper introduces a new technology of diffracting arrays and novel signal processing methods for characterization of these arrays and localization of acoustic sources. The theory and experimental implementation of an acoustic diffracting array (ADA) is presented, including singular value decomposition and the effect of robustness. The results indicate that ADA results in increased localization accuracy, and more directional point spread functions due to increased magnitude and phase differences compared to a free-field array.