Effect of Correlation on Signal Detection in Arctic Under-Ice Noise

Signal detection in a large segment of non-Gaussian and non-stationary Arctic under-ice noise, which contains both high power narrow-band and impulsive components, is examined. It is shown that the correlation functions of sub-segments of data change significantly, and if ignored, can degrade the pe...

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Bibliographic Details
Main Authors: Nielsen, P. A., Thomas, J. B.
Other Authors: PRINCETON UNIV NJ DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
Format: Text
Language:English
Published: 1988
Subjects:
Electrical and Electronic Equipment
Acoustic Detection and Detectors
Acoustics
*HIGH POWER
DETECTORS
PROBABILITY
SHAPE
FALSE ALARMS
CORRELATION
PULSES
SIGNALS
SAMPLING
ADAPTIVE FILTERS
NOISE
HYDROPHONES
MATCHED FILTERS
FUNCTIONS(MATHEMATICS)
NARROWBAND
ARCTIC REGIONS
NOISE(SOUND)
OMNIDIRECTIONAL
BANDSTOP FILTERS
UNDERICE
DETECTION
Arctic
Online Access:http://www.dtic.mil/docs/citations/ADA230143
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA230143
Description
Summary:Signal detection in a large segment of non-Gaussian and non-stationary Arctic under-ice noise, which contains both high power narrow-band and impulsive components, is examined. It is shown that the correlation functions of sub-segments of data change significantly, and if ignored, can degrade the performance of the detector. For a false alarm probability of 0.05 and a known constant signal, the matched filter was on average 17.6% better than a detector designed assuming independent noise samples. It is also shown that pre-processing the data with an adaptive notch filter, then using the matched filter will result in a further improvement of about 6%. Additionally, the effect two different signal shapes have on the performance of the matched filter is examined. Keywords: Underwater sound d signals; Underice noise sound; Omnidirectional hydrophones.

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