Volume 8 Issue 1
Mar.  2019
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Article Navigation >  Journal of Radars  > 2019  >  8(1): 107-117
YAN Hua, CHEN Yong, LI Sheng, et al. A fast algorithm for establishing 3-D scattering center model for ship targets over sea surface using the shooting and bouncing ray technique[J]. Journal of Radars, 2019, 8(1): 107–116. doi: 10.12000/JR18078
Citation: YAN Hua, CHEN Yong, LI Sheng, et al. A fast algorithm for establishing 3-D scattering center model for ship targets over sea surface using the shooting and bouncing ray technique[J]. Journal of Radars, 2019, 8(1): 107–116. doi: 10.12000/JR18078
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A Fast Algorithm for Establishing 3-D Scattering Center Model for Ship Targets over Sea Surface Using the Shooting and Bouncing Ray Technique

doi: 10.12000/JR18078
  • ①.

    Information Engineering School, Communication University of China, Beijing 100024, China

  • ②.

    Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China

Funds:  The National Natural Science Foundation of China (61490690, 61490695), Defense Industrial Technology Development Program (JCKY2016204C302)
More Information
  • Corresponding author: YAN Hua, yanhuabit@126.com
  • Received Date: 2018-09-20
  • Rev Recd Date: 2018-10-29
    • Available Online: 2018-12-07
  • Publish Date: 2019-02-28
    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.

     

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