Accession Number : ADA204889

Title :   The Analysis of Some Undersea Noise with Applications to Detection,

Corporate Author : PRINCETON UNIV NJ INFORMATION SCIENCES AND SYSTEMS LAB

Personal Author(s) : Willett, Peter ; Thomas, John B

PDF Url : ADA204889

Report Date : Oct 1986

Pagination or Media Count : 12

Abstract : This paper treats a signal detection problem using real noise records. The authors have had access to two medium-sized (each about 100000 samples) data sets, each from a non-Gaussian marine environment. The first, collected near a merchant shipping lane, has lower-than-Gaussian probability of high-amplitude observations (light tails). This appears to be due to the presence of a powerful narrowband component; when this is removed by an adaptive notch filter, the tails become heavier. The second, collected near a shrimp bed, has extremely heavy tails and a kurtosis (normalized fourth moment) of 82. Excellent results are achieved through the use of a Johnson noise model fit. Keywords: Merchant noise; Shrimp noise; Johnson noise; Nonlinear detectors. (jhd)

Descriptors :   *DETECTORS, *NOISE, ACCESS, ADAPTIVE FILTERS, BANDSTOP FILTERS, DATA BASES, DETECTION, LIGHT, MERCHANT VESSELS, MOMENTS, NARROWBAND, NONLINEAR SYSTEMS, OCEAN ENVIRONMENTS, PATHS, RECORDS, SHIPPING, SHRIMP, SIGNALS, TAIL ASSEMBLIES, UNDERWATER

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE