A Fast Algorithm for Establishing 3-D Scattering Center Model for Ship Targets over Sea Surface Using the Shooting and Bouncing Ray Technique
Yan Hua①②* Chen Yong② Li Sheng② Hu Liping② Li Huanmin② Yin Hongcheng①②
①(Information Engineering School, Communication University of China, Beijing 100024, China) ②(Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China)
Abstract：Fast construction of the 3-D scattering centers of ship targets on the sea surface is important for many radar applications, including the fast signature prediction, feature extraction, and automatic recognition of targets. Combining the "four-path" model for target-surface coupling scattering with modified Fresnel reflection coefficient model in the stochastic sea surface and ray tube integration method, we propose a 3-D image formation method for ship-surface compound targets. Using the CLEAN technique on 3-D image, we develop a fast algorithm for establishing 3-D scattering center model for ship targets on the sea surface. Because this algorithm realizes 3D imaging of targets at a single frequency and single aspect angle, and adopts simplified surface model to avoid the need to construct a large number of surface elements, the computational efficiency of the proposed alogrithm is greatly increased to meet the needs of practical engineering applications. Simulation experiments of a typical ship target show that the proposed algorithm can increase the speed by four orders of magnitude under typical conditions, as compared with the traditional FFT-based 3D imaging method. We validate the accuracy of this algorithm by comparing reconstructed 1-D range profiles and ISAR images obtain by the scattering center model with the ones that are directly simulated.
闫 华, 陈 勇, 李 胜, 胡利平, 李焕敏, 殷红成. 基于弹跳射线法的海面舰船目标三维散射中心快速建模方法[J]. 雷达学报, 0, (): 0-0.
Yan Hua, Chen Yong, Li Sheng, Hu Liping, Li Huanmin, Yin Hongcheng. A Fast Algorithm for Establishing 3-D Scattering Center Model for Ship Targets over Sea Surface Using the Shooting and Bouncing Ray Technique. JOURNAL OF RADARS, 0, (): 0-0.
