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We present a novel switched slide window tracker (SSWT) to track moving targets for Automatic Radar Plotting Aid (ARPA) information in maritime radar. The SSWT is composed of both α-β tracker to find the initial parameters of a slide window and slide window tracker (SWT) to track the moving targets. The proposed algorithm does not require a high computation complexity. In addition, the proposed method can effectively track the nonlinear model by using a piecewise linear model in a target trajectory. The maritime radar simulator with the proposed SSWT algorithm is realized using a commercial DSP board.

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