NDLI: Distributed source localization with multiple sensor arrays and frequency-selective spatial coherence

Content Provider	IEEE Xplore Digital Library
Author	Kozick, R.J. Sadler, B.M.
Copyright Year	2000
Description	Author affiliation: Bucknell Univ., Lewisburg, PA, USA (Kozick, R.J.)
Abstract	Multiple sensor arrays distributed over a planar region provide the means for highly accurate localization of the (x,y) position of a source. In some applications, such as microphone arrays receiving aeroacoustic signals from ground vehicles, random fluctuations in the air lead to frequency-selective coherence of the signals that arrive at widely separated arrays. We present a performance analysis for localization of a wideband source using multiple sensor arrays. The wavefronts are modeled with perfect spatial coherence over individual arrays and with frequency-selective coherence between distinct arrays. The sensor signals are modeled as wideband Gaussian random processes, and we study the Cramer-Rao bound (CRB) on source localization accuracy for varying levels of signal coherence and for processing schemes with different levels of complexity. We show that significant improvements in source localization accuracy are possible when partial signal coherence from array to array is exploited. Further, we show that a distributed processing scheme involving bearing estimation at the individual arrays and time-delay estimation between pairs of sensors performs nearly as well as the optimum scheme that jointly processes the signals from all sensors. Results based on measured aeroacoustic data are included to illustrate frequency-selective signal coherence at distributed arrays.
Starting Page	419
Ending Page	423
File Size	454872
Page Count	5
File Format	PDF
ISBN	0780359887
DOI	10.1109/SSAP.2000.870158
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-08-16
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensor arrays Microphone arrays Frequency Signal processing Wideband Land vehicles Fluctuations Performance analysis Spatial coherence Random processes
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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