NDLI: Detection of non-Gaussian signals by frequency domain Kurtosis estimation

Content Provider	IEEE Xplore Digital Library
Author	Dwyer, R.
Copyright Year	1983
Description	Author affiliation: Naval Underwater Systems Center, New London, Connecticut (Dwyer, R.)
Abstract	The detection of signals by power spectrum density (PSD) estimation is a well known and often employed method. The PSD estimate is essentially a second order measure which is not sensitive to the statistical nature of the signals. For non-Gaussian signals, a frequency domain Kurtosis (FDK) estimate supplements the PSD estimate and in some cases of practical importance is superior as a detection statistic. Non-Gaussian signals occur in underwater acoustics due to multipath and frequency modulation effects. Specifically, we have considered sinusoidal and narrowband Gaussian signals which, when propagated through fading or multipath environments, are received as non-Gaussian in terms of a frequency domain Kurtosis estimate. The environment is modeled by introducing amplitude probability density distributions which are due to the fading or multipath conditions. Several distributions were considered previously which included Rayleigh and log-normal, both of which have been experimentally verified to exist in the ocean. The asymptotic probability of detection for a randomly occurring signal is derived for the PSD and FDK. A simulation comparing the probability of detection for the FDK and PSD is also included.
Starting Page	607
Ending Page	610
File Size	83474
Page Count	4
File Format	PDF
DOI	10.1109/ICASSP.1983.1172264
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-04-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal detection Frequency domain analysis Frequency estimation Rayleigh channels Acoustic measurements Sea measurements Acoustic signal detection Statistics Underwater acoustics Frequency modulation
Content Type	Text
Resource Type	Article

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