Collaborative Sensor Networking Towards Real-Time Acoustical Beamforming in Free-Space and Limited Reverberance

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	Similar Articles Articles by Pierpaolo Bergamo Articles by Shadnaz Asgari Articles by Hanbiao Wang Articles by Daniela Maniezzo Articles by Len Yip Articles by Ralph E. Hudson Articles by Kung Yao Articles by Deborah Estrin

July 2004 (vol. 3 no. 3)

pp. 211-224

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	Pierpaolo Bergamo, Shadnaz Asgari, Hanbiao Wang, Daniela Maniezzo, Len Yip, Ralph E. Hudson, Kung Yao, Deborah Estrin, "Collaborative Sensor Networking Towards Real-Time Acoustical Beamforming in Free-Space and Limited Reverberance," IEEE Transactions on Mobile Computing, vol. 3, no. 3, pp. 211-224, July, 2004.

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	@article{ 10.1109/TMC.2004.17, author = {Pierpaolo Bergamo and Shadnaz Asgari and Hanbiao Wang and Daniela Maniezzo and Len Yip and Ralph E. Hudson and Kung Yao and Deborah Estrin}, title = {Collaborative Sensor Networking Towards Real-Time Acoustical Beamforming in Free-Space and Limited Reverberance}, journal ={IEEE Transactions on Mobile Computing}, volume = {3}, number = {3}, issn = {1536-1233}, year = {2004}, pages = {211-224}, doi = {http://doi.ieeecomputersociety.org/10.1109/TMC.2004.17}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, }

	RefWorks Procite/RefMan/Endnote	x
	TY - JOUR JO - IEEE Transactions on Mobile Computing TI - Collaborative Sensor Networking Towards Real-Time Acoustical Beamforming in Free-Space and Limited Reverberance IS - 3 SN - 1536-1233 SP211 EP224 EPD - 211-224 A1 - Pierpaolo Bergamo, A1 - Shadnaz Asgari, A1 - Hanbiao Wang, A1 - Daniela Maniezzo, A1 - Len Yip, A1 - Ralph E. Hudson, A1 - Kung Yao, A1 - Deborah Estrin, PY - 2004 KW - Beamforming KW - source localization KW - distributed sensor network KW - wireless network KW - microphone array KW - time synchronization KW - reverberance. VL - 3 JA - IEEE Transactions on Mobile Computing ER -

Len Yip, IEEE

Kung Yao, IEEE

Deborah Estrin, IEEE

DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TMC.2004.17

Wireless sensor networks have been attracting increasing research interest given the recent advances in microelectronics, array processing, and wireless networking. Consisting of a large collection of small, wireless, low-cost, integrated sensing, computing, and communicating nodes capable of performing various demanding collaborative space-time processing tasks, wireless sensor network technology poses various unique design challenges, particularly for real-time operation. In this paper, we review the Approximate Maximum-Likelihood (AML) method for source localization and direction-of-arrival (DOA) estimations. Then, we consider the use of least-squares (LS) method applied to DOA bearing crossings to perform source localization. A novel virtual array model applicable to the AML-DOA estimation method is proposed for reverberant scenarios. Details on the wireless acoustical testbed are given. We consider the use of Compaq iPAQ 3760s, which are handheld, battery-powered device normally meant to be used as personal organizers (PDAs), as sensor nodes. The iPAQ provide a reasonable balance of cost, availability, and functionality. It has a build-in StrongARM processor, microphone, codec for acoustic acquisition and processing, and a PCMCIA bus for external IEEE 802.11b wireless cards for radio communication. The iPAQs form a distributed sensor network to perform real-time acoustical beamforming. Computational times and associated real-time processing tasks are described. Field measured results for linear, triangular, and square subarrays in free-space and reverberant scenarios are presented. These results show the effective and robust operation of the proposed algorithms and their implementations on a real-time acoustical wireless testbed.

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Index Terms:

Beamforming, source localization, distributed sensor network, wireless network, microphone array, time synchronization, reverberance.

Citation:

Pierpaolo Bergamo, Shadnaz Asgari, Hanbiao Wang, Daniela Maniezzo, Len Yip, Ralph E. Hudson, Kung Yao, Deborah Estrin, "Collaborative Sensor Networking Towards Real-Time Acoustical Beamforming in Free-Space and Limited Reverberance," IEEE Transactions on Mobile Computing, vol. 3, no. 3, pp. 211-224, July 2004, doi:10.1109/TMC.2004.17

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