Optimized Acoustic Localization with SRP-PHAT for Monitoring in Distributed Sensor Networks

• Autorzy: Astapov S. , Berdnikova J. , Preden J.-S.

Identyfikatory

DOI

10.2478/eletel-2013-0047

• Języki publikacji: EN

Abstrakty

EN

Acoustic localization by means of sensor arrays has a variety of applications, from conference telephony to environment monitoring. Many of these tasks are appealing for implementation on embedded systems, however large dataflows and computational complexity of multi-channel signal processing impede the development of such systems. This paper proposes a method of acoustic localization targeted for distributed systems, such as Wireless Sensor Networks (WSN). The method builds on an optimized localization algorithm of Steered Response Power with Phase Transform (SRP-PHAT) and simplifies it further by reducing the initial search region, in which the sound source is contained. The sensor array is partitioned into sub-blocks, which may be implemented as independent nodes of WSN. For the region reduction two approaches are handled. One is based on Direction of Arrival estimation and the other – on multilateration. Both approaches are tested on real signals for speaker localization and industrial machinery monitoring applications. Experiment results indicate the method’s potency in both these tasks.

Słowa kluczowe

EN

acoustic localization; wireless sensor networks; direction of arrival; multilateration; SRP-PHAT

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2013
• Tom: Vol. 59, No. 4
• Strony: 383--390
• Opis fizyczny: Bibliogr. 21 poz., wykr.

Twórcy

autor

Astapov S.

• Laboratory for Proactive Technologies, Department of Computer Control, Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia

autor

Berdnikova J.

• Department of Radio and Communication Engineering, Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia

autor

Preden J.-S.

• Laboratory for Proactive Technologies, Department of Computer Control, Tallinn University of Technology, Ehitajate tee 5, 19086, Tallinn, Estonia

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