ESPRIT Super-Resolution Imaging Algorithm Based on External Illuminators
Passive radar imaging algorithm based on external illuminator requires large accumulated rotating angle of target. But in an actual circumstance, large rotating angle demands long time ， which is hard to satisfy the request of real time ，on the other hand ，target reflectivity function differs at various aspect angles ，moreover ，when rotating angle increases ，target reflectivity function differs seriously. In this paper, an ESPRIT based high resolution passive radar imaging algorithm is proposed to solve the problem which is that how to form a good image at the instant of small rotating angle. In the method self-correlation matrix of the returned echoes is estimated firstly ，then corresponding sine wave frequencies of the scattering-centers with the object is determined through eigenvalue decomposition ，target location is deduced by the sine wave frequency ，hence the reflectivity of the scattering-centers are computed. Computer simulation confirms the feasibility of the algorithm.
rotational invariance techniques external illuminator passive radar imaging super-resolution
Li Yan Wang Jun Liu Jinrong
National Key Lab of Radar Signal Processing ,Xidian University ,Xian 710071 ,China
国际会议
首届亚太合成孔径雷达会议(1st Asian and Pacific Conference on Synthetic Aperture Radar Proceedings)
安徽黄山
英文
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）