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dc.contributor.authorDobeck, Gerald J.
dc.contributor.authorWilbur, JoEllen
dc.contributor.authorAzimi-Sadjadi, Mahmood R.
dc.contributor.authorYuan, Chunhua
dc.date.accessioned2007-01-03T04:18:51Z
dc.date.available2007-01-03T04:18:51Z
dc.date.issued2000
dc.descriptionIncludes bibliographical references.
dc.description.abstractIn this paper, new pre- and post-processing schemes are developed to process shallow-water sonar data to improve the accuracy of target detection. A multichannel subband adaptive filtering is applied to preprocess the data in order to isolate the potential target returns from the acoustic backscattered signals and improve the signal-to-reverberation ratio. This is done by estimating the time delays associated with the reflections in different subbands. The preprocessed results are then beamformed to generate an image for each ping of the sonar. The testing results on both the simulated and real data revealed the efficiency of this scheme in time-delay estimation and its capability in removing most of the competing reverberations and noise. To improve detection rate while significantly minimizing the incident of false detections, a high-order correlation (HOC) method for postprocessing the beamformed images is then developed. This method determines the consistency in occurrence of the target returns in several consecutive pings. The application of the HOC process to the real beamformed sonar data showed the ability of this method for removing the clutter and at the same time boosting the target returns in several consecutive pings. The algorithm is simple, fast, and easy to implement.
dc.description.sponsorshipThis work was supported by the Office of Naval Research (ONR 321TS) under Contract N61331-94-K-0018.
dc.format.mediumborn digital
dc.format.mediumarticles
dc.identifier.bibliographicCitationYuan, Chunhua, et al., Underwater Target Detection Using Multichannel Subband Adaptive Filtering and High-Order Correlation Schemes, IEEE Journal of Oceanic Engineering 25, no. 1 (January 2000): 192-205.
dc.identifier.urihttp://hdl.handle.net/10217/996
dc.languageEnglish
dc.publisherColorado State University. Libraries
dc.publisher.originalIEEE
dc.relation.ispartofFaculty Publications - Department of Electrical and Computer Engineering
dc.rights©2000 IEEE
dc.subjectsonar
dc.subjecthigh-order correlation
dc.subjectadaptive filtering
dc.subjecttarget detection
dc.subjectwavelet transform
dc.titleUnderwater target detection using multichannel subband adaptive filtering and high-order correlation schemes
dc.typeText


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