1. 海军航空工程学院电子信息工程系,山东,烟台,264001
2. 海军航空工程学院信息融合研究所,山东,烟台,264001
3. 海军航空工程学院电子信息工程系,山东,烟台,264001
4. 海军航空工程学院信息融合研究所,山东,烟台,264001
纸质出版:2014
移动端阅览
陈小龙, 刘宁波, 王国庆, 等. 基于高斯短时分数阶Fourier变换 的海面微动目标检测方法[J]. 电子学报, 2014,42(5):971-977.
CHEN Xiao-long, LIU Ning-bo, WANG Guo-qing, et al. Gaussian Short-Time Fractional Fourier Transform Based Detection Algorithm of Target with Micro-Motion at Sea[J]. Acta Electronica Sinica, 2014, 42(5): 971-977.
陈小龙, 刘宁波, 王国庆, 等. 基于高斯短时分数阶Fourier变换 的海面微动目标检测方法[J]. 电子学报, 2014,42(5):971-977. DOI: 10.3969/j.issn.0372-2112.2014.05.021.
CHEN Xiao-long, LIU Ning-bo, WANG Guo-qing, et al. Gaussian Short-Time Fractional Fourier Transform Based Detection Algorithm of Target with Micro-Motion at Sea[J]. Acta Electronica Sinica, 2014, 42(5): 971-977. DOI: 10.3969/j.issn.0372-2112.2014.05.021.
海上目标随海面颠簸导致姿态变化,引起回波功率调制效应,导致回波多普勒体现时变和非平稳特性.为此,本文将微多普勒理论应用于海杂波中弱目标检测,提出一种基于高斯短时分数阶Fourier变换(GSTFRFT)的海面微动目标检测方法.首先,建立海面目标的平动和三维转动回波模型;然后,基于海尖峰判别方法对回波信号进行数据筛选,改善信杂比,并采用GSTFRFT对微动信号进行增强处理,利用海面目标与海杂波的微动特征差异设计恒虚警检测方法;最后,通过GSTFRFT域滤波,提取信号的微动特征并得到瞬时频率.实测雷达数据仿真结果验证了算法的有效性,具有在强海杂波中检测微弱目标的能力.
The attitude of target at sea may vary with the fluctuation of sea surface
which induces the effect of power modulation of radar echo
and also the Doppler reflects time-varying and nonstationary properties.In this paper
micro-Doppler theory is applied to weak target detection within sea clutter
and an algorithm of detecting micro-motion target at sea is proposed via Gaussian short-time fractional Fourier transform (GSTFRFT).Firstly
signal model of target on the sea surface is established including translation and 3-D rotation movements.Then
radar returns are selected based on sea spikes identification for better signal-to-clutter ratio.Moreover
micro-motion signal is enhanced via GSTFRFT
and signature differences between target and sea clutter are utilized for designing constant false alarm ratio detector.Finally
micro-motion signature and instantaneous frequency can be extracted and obtained by filtering in GSTFRFT domain.Simulation results with real datasets validate the effectiveness of the algorithm
which is qualified for detecting weak target in strong sea clutter environment.
0
浏览量
1889
下载量
15
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621