| 海杂波微弱目标分形检测 |
| |
| 作者姓名： | LI Yang LV Xiaowen LIU Kuisheng ZHAO Shangzhuo |
| |
| 作者单位： | China Academy of Electronics and Information Technology, Beijing 100041, China;Beijing Urban Engineering Design & Research Institute CO., LTD, Beijing 100037, China;Beijing Urban Construction Group Co., Ltd., Beijing 100088, China;School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China. |
| |
| 基金项目： | The National Natural Science Foundation of China Project under contract Nos 41276187 and 41076119; the Scientific Research Foundation for Introducing Talents, Nanjing University of Information Science and Technology under contract No. 20110310; Jiangsu Natural Science Foundation under contract No. BK2011008. |
| |
| 摘 要： | 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-do- main 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 suooort this conclusion.
|
| 关 键 词： | 弱目标检测 分形特征 海杂波 Hurst指数 DFA评价 波动分析 多普勒中心 雷达脉冲 |
| 收稿时间： | 2013/7/20 0:00:00 |
| 修稿时间： | 2014/3/10 0:00:00 |
Fractal-based weak target detection within sea clutter |
| |
| 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. |
| |
| Authors: | LI Yang LV Xiaowen LIU Kuisheng and ZHAO Shangzhuo |
| |
| Institution: | 1.China Academy of Electronics and Information Technology, Beijing 100041, China2.Beijing Urban Engineering Design & Research Institute CO., LTD, Beijing 100037, China3.Beijing Urban Construction Group Co., Ltd., Beijing 100088, China4.School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China. |
| |
| 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. |
| |
| Keywords: | sea clutter weak target detection generalized detrended fluctuation analysis |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
