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 p...

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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:
Acoustic Detection and Detectors
*ACOUSTIC DETECTORS
*ACOUSTIC DATA
*UNDERWATER SOUND SIGNALS
PROBABILITY
SHAPE
MOVING TARGETS
FALSE ALARMS
CORRELATION
PULSES
SAMPLING
ADAPTIVE FILTERS
MATCHED FILTERS
FUNCTIONS(MATHEMATICS)
PREPROCESSING
NARROWBAND
ARCTIC REGIONS
NOISE(SOUND)
SONAR TARGETS
BANDSTOP FILTERS
DETECTION
UNDERICE
HIGH POWER
OPTIMIZATION
NOTCHED FILTERS
UNDERICE ACOUSTICS
CORRELATION FUNCTIONS
Arctic
Online Access:http://www.dtic.mil/docs/citations/ADA203821
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA203821
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 a 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: Acoustic data; Underice acoustic detectors. Presented at the Annual Asilomar Conference on Signals, Systems, and Computers (22nd), Asilomar, CA, 31 Oct-2 Nov 1988.

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