Multiple-input multiple-output (MIMO) analog-to-feature converter chipsets for sub-wavelength acoustic source localization and bearing estimation

Shantanu Chakrabartty

doi:10.1117/12.852671

5 May 2010 Multiple-input multiple-output (MIMO) analog-to-feature converter chipsets for sub-wavelength acoustic source localization and bearing estimation

Shantanu Chakrabartty

Author Affiliations +

Proceedings Volume 7666, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IX; 766628 (2010) https://doi.org/10.1117/12.852671
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Localization of acoustic sources using miniature microphone arrays poses a significant challenge due to fundamental limitations imposed by the physics of sound propagation. With sub-wavelength distances between the microphones, resolving acute localization cues become difficult due to precision artifacts. In this work, we present the design of a miniature, microphone array sensor based on a patented Multiple-input Multiple-output (MIMO) analog-to-feature converter (AFC) chip-sets which overcomes the limitations due to precision artifacts. Measured results from fabricated prototypes demonstrate a bearing range of 0 degrees to 90 degrees with a resolution less than 2 degrees. The power dissipation of the MIMO-ADC chip-set for this task was measured to be less than 75 microwatts making it ideal for portable, battery powered sniper and gunshot detection applications.

Citation Download Citation

Shantanu Chakrabartty "Multiple-input multiple-output (MIMO) analog-to-feature converter chipsets for sub-wavelength acoustic source localization and bearing estimation", Proc. SPIE 7666, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense IX, 766628 (5 May 2010); https://doi.org/10.1117/12.852671

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