摘要
相对于粗糙海洋表面,海面小目标的后向散射比较微弱,导致了海杂波背景下的微弱目标很难检测。由于海面目标和海面波浪在速度上的差异,多普勒频率成为海面微弱目标检测可以利用的一个有效线索。近年来分形几何在海杂波分析方面有了比较深入的研究。将多普勒频率和分形几何概念相结合,将有助于对海面杂波背景下的微弱目标进行检测。去趋势波动分析是提取分形对象分形参数的有效工具。通过去趋势波动分析,对多普勒域海杂波进行分形参数提取,利用不同距离单元分形参数的不同可以有效地判断微弱目标存在。最后,利用IPIX实测雷达数据对所提算法进行仿真实验,实验结果表明,该方法能够有效判断海面微弱目标存在。
Weaker target within the heavy sea clutter is very difficult to detect directly due to its weaker backscattering relative to the rough sea surface. The Doppler frequency may be the better available clue to detect a weak target within sea clutter based on the velocity differences of target and sea surface waves.Moreover,fractal has recently been used for the analysis of radar sea clutters,especially detrended fluctuation analysis（ DFA）. The use of the concepts of Doppler frequency and DFA together will help us to detect weaker target in heavy sea clutters and give a considerable improvement in detection performance.In order for supporting this conclusion,some simulations with real IPIX radar data have been represented.
出处
《中国电子科学研究院学报》
2014年第6期619-623,共5页
Journal of China Academy of Electronics and Information Technology
基金
总装预研项目(102060302)
关键词
海杂波
目标探测
去趋势波动分析
sea clutter
target detection
detrended fluctuation analysis（DFA）
