Coherent acoustic array processing and localization on wireless sensor networks

Advances in microelectronics, array processing, and wireless networking have motivated the analysis and design of low-cost integrated sensing, computing, and communicating nodes capable of performing various demanding collaborative space-time processing tasks. In this paper, we consider the problem...

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Bibliographic Details
Published in:Proceedings of the IEEE 2003, Vol.91 (8), p.1154-1162
Main Authors: Chen, J.C., Yip, L., Elson, J., Hanbiao Wang, Maniezzo, D., Hudson, R.E., Kung Yao, Estrin, D.
Format: Article
Language:English
Subjects:
Acoustic sensors
Acoustic testing
Acoustics
Algorithms
Array signal processing
Arrays
Coherence
Collaboration
Computer networks
Localization
Microelectronics
Microphone arrays
Networks
Performance analysis
Position (location)
Sensor arrays
Sensors
Wireless sensor networks
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Summary:Advances in microelectronics, array processing, and wireless networking have motivated the analysis and design of low-cost integrated sensing, computing, and communicating nodes capable of performing various demanding collaborative space-time processing tasks. In this paper, we consider the problem of coherent acoustic sensor array processing and localization on distributed wireless sensor networks. We first introduce some basic concepts of beamforming and localization for wide-band acoustic sources. A review of various known localization algorithms based on time-delay followed by least-squares estimations as well as the maximum-likelihood method is given. Issues related to practical implementation of coherent array processing, including the need for fine-grain time synchronization, are discussed. Then we describe the implementation of a Linux-based wireless networked acoustic sensor array testbed, utilizing commercially available iPAQs with built-in microphones, codecs, and microprocessors, plus wireless Ethernet cards, to perform acoustic source localization. Various field-measured results using two localization algorithms show the effectiveness of the proposed testbed. An extensive list of references related to this work is also included.
ISSN:0018-9219
1558-2256
DOI:10.1109/JPROC.2003.814924