Abstract
An acoustic vector-sensor (also known as vector-hydrophone in underwater applications) is composed of two or three spatially collocated but orthogonally oriented acoustic velocity sensors, plus possibly a collocated acoustic pressure sensor. Such an acoustic vector sensor is versatile for direction-finding, due to its azimuth-elevation spatial response’s independence from the incident source’s frequency, and bandwidth. However, previously unavailable in the open literature is how the acoustic vector sensor’s far-field direction-of-arrival estimates may be adversely affected by any unknown nonideality in the acoustic vector sensor’s gain response, phase response, collocation, or orthogonal orientation among its constituent velocity sensors. This paper pioneers a characterization of how these various unknown nonidealities degrade direction-finding accuracy, via Cramér-Rao bound analysis.
Original language | English |
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Pages (from-to) | 969-982 |
Number of pages | 14 |
Journal | IEEE Sensors Journal |
Volume | 9 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Jan 2009 |
Keywords
- Acoustic interferometry
- acoustic signal processing
- acoustic velocity measurement
- array signal processing
- direction of arrival estimation
- phased arrays
- sonar arrays
- sonar signal processing
- underwater acoustic arrays
ASJC Scopus subject areas
- Instrumentation
- Electrical and Electronic Engineering