Zhenyuan Ji

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Under certain sea state, the sea wave will lead to the ship oscillation when the ship is sailing on the sea. The influence that the ship oscillation has on the target echo is usually discarded when simulating the target in shipborne HFSWOTHR. In this paper, the characteristic of ship oscillation is analyzed, including rolling, pitching and yawing. The model(More)
In the electronic reconnaissance, the identification of radio signal pulse modulation characteristics has vital significance. Firstly, this paper adopts short time fourier transform (STFT) method to analyse the pulse modulation feature of four typical radio reconnaissance signals: linear FM signal (LFM), Tangent FM signal, binary phase coded signal (BPSK),(More)
In order to further investigate HF radar waves echo chaotic characteristics, we study HF waves echo data. The correlation dimension and Kolmogorov entropy are calculated based on the phase space reconstruction theory. In the calculation of the correlation dimension, the fuzzy K-means algorithm is used to determine the scale-free range to improve the(More)
In this paper, analysis of the broadening effect of the first-order sea clutter in the HFSWR (High Frequeny Surface Waves Radar) radar system of moving shipborne platform is given. The platform is moving in six degrees of freedom (DOF) and the model of movement has been built. The technique of STAP (Space-Time Adaptive Processing) is proposed to compensate(More)
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