From 2008 to 2010, he was a Design Engineer with Rutter Technologies, St. degree in electrical engineering from the Memorial University of Newfoundland, St. degrees in radio physics from Wuhan University, Wuhan, China, in 1995, 1997, and 2001, respectively, and the M.Eng. Experimental results show that the number of detected ships that match with the automatic identification system (AIS) records is four times more than that obtained by the conventional constant false alarm rate (CFAR) detectors and 1.3 times more than that by the state-of-the-art TF method in consideration of approximately the same number of detected targets.ĭr.
The proposed TF method can separate TF ridges of similar Doppler frequency and performs constant false alarm rate (CFAR) detection for TF targets, which facilitates detecting these targets that are masked by sea clutter and other large targets. Then, whether ship signals exist in the TF ridges or not is decided by a decision threshold that is calculated by fitting the probability distribution function (PDF) of sea clutter in the TF domain. The TF target ridge areas are extracted in the TF image via the eigenvalues of the Hessian matrix, image edge detection, and local maximum search. To address this problem, an automatic ship detection method based on time–frequency (TF) analysis is presented in this paper. Compact HFSWR often suffers from missing targets, especially when the target appears near the Doppler region with heavy sea clutter or near another target in a multi-target scenario.
Shockwave has a large selection of fun online and download dress up games.As one of the main sensors for continuous maritime measurements of sea state parameters, high-frequency surface wave radar (HFSWR) also plays an important role in ship detection and tracking. has games for everyone - free online games, free download games and new daily games each week, not to mention game reviews and ratings, a community full of gamers and plenty of exclusive member perks. You'll enjoy unlimited play on all download games, no ad interruptions on all online games and brand new games each week.
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