Fractal-based weak target detection within sea clutter

LI Yang; LV Xiaowen; LIU Kuisheng; ZHAO Shangzhuo

doi:10.1007/s13131-014-0519-1

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Article Navigation > Acta Oceanologica Sinica > 2014 > 33(9): 68-72

LI Yang, LV Xiaowen, LIU Kuisheng, ZHAO Shangzhuo. Fractal-based weak target detection within sea clutter[J]. Acta Oceanologica Sinica, 2014, 33(9): 68-72. doi: 10.1007/s13131-014-0519-1

Citation:

LI Yang, LV Xiaowen, LIU Kuisheng, ZHAO Shangzhuo. Fractal-based weak target detection within sea clutter[J]. Acta Oceanologica Sinica, 2014, 33(9): 68-72. doi: 10.1007/s13131-014-0519-1

LI Yang, LV Xiaowen, LIU Kuisheng, ZHAO Shangzhuo. Fractal-based weak target detection within sea clutter[J]. Acta Oceanologica Sinica, 2014, 33(9): 68-72. doi: 10.1007/s13131-014-0519-1

Citation:

LI Yang, LV Xiaowen, LIU Kuisheng, ZHAO Shangzhuo. Fractal-based weak target detection within sea clutter[J]. Acta Oceanologica Sinica, 2014, 33(9): 68-72. doi: 10.1007/s13131-014-0519-1

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Fractal-based weak target detection within sea clutter

doi: 10.1007/s13131-014-0519-1

1.
China Academy of Electronics and Information Technology, Beijing 100041, China
2.
Beijing Urban Engineering Design & Research Institute CO., LTD, Beijing 100037, China
3.
Beijing Urban Construction Group Co., Ltd., Beijing 100088, China
4.
School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China.

Received Date: 2013-07-20
Rev Recd Date: 2014-03-10

Abstract

Abstract

The target on the sea surface is complex and difficult to detect due to the interference of backscattered returns from the sea surface illuminated by the radar pulse. Detrended fluctuation analysis (DFA) has been used successfully to extract the time-domain Hurst exponent of sea-clutter series. Since the frequency of the sea clutter mainly concentrates around Doppler center so that we consider to extract frequency-domain fractal characterization and then detect a weak target within sea clutter by using the difference of frequency-domain fractal characterization. The generalized detrended fluctuation analysis (GDFA) is more flexible than traditional DFA owing to its smoothing action for the clutters. In this paper, we apply the GDFA to evaluate the generalized Hurst exponent of sea-clutter series in the frequency domain. The difference of generalized Hurst exponents between different sea-clutter range bins would be used to determine whether the target exists. Moreover, some simulations with the real IPIX radar data have also been demonstrated in order to support this conclusion.
- sea clutter,
- weak target detection,
- generalized detrended fluctuation analysis

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References(19)

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