摘要
针对舰船三维摆动和海尖峰制约高海情环境弹载雷达探测性能的问题,面向高海情探测环境提出了一种新的成像检测思路。首先,基于高海情环境分别建立舰船与海杂波回波模型;其次,将改进离散调频傅里叶变换算法(modified discrete chirp Fourier transform, MDCFT)引入回波多普勒成像,消除了高阶项相位导致的散焦现象;在此基础上,利用水平集算法分割目标与背景区域,然后利用聚类算法确定每个目标区域;最后,基于提取的目标特征判决每个区域对应的目标身份。利用仿真数据的实验结果验证了所提算法的有效性。所提方法综合考虑了成像与检测环节性能的提升,为高海情环境下的弹载雷达制导提供了一种可行思路。
In order to improve the performance of missile-borne radar constrained by ship three-dimensional oscillation and sea spikes under high sea state.A feasible imaging and detection idea is proposed.First of all,the echo model of ship and sea clutter under high sea state is established.Secondly,a modified discrete chirp Fourier transform(MDCFT)algorithm is applied for the Doppler imaging to eliminate the range Doppler(RD)image defocus caused by the high-order phase of echo.After that,the level set algorithm is used to detect the target area of the image and avoid the parameter setting steps in the constant false alarm rate(CFAR)algorithm,and the clustering algorithm is used to obtain the region of each target.Finally,the target features are extracted and used to determine whether the target is a ship.The effectiveness of the algorithm is verified by the experimental results of simulation data.This method takes into account the improvement in both imaging and detection steps,and provides a feasible idea for the guidance of missile-borne radar under high sea state.
作者
周利
胡杰民
付连庆
凌三力
ZHOU Li;HU Jiemin;FU Lianqing;LING Sanli(Southwest China Institute of Electronic Technology,Chengdu 610036,China;School of Information,Zhejiang SciTech University,Hangzhou 310018,China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2024年第4期1247-1254,共8页
Systems Engineering and Electronics
基金
中电十所创新基金(20200323090224,H20003.1)
国防科技重点实验室基金(WDZC20205500208)资助课题。
关键词
高海情
目标检测
水平集
改进chirp傅里叶变换
high sea state
target detection
level set
modified discrete chirp Fourier transform
