Interferometric inverse synthetic aperture radar imaging for space targets based on wideband direct sampling using two antennas

Abstract

Interferometric inverse synthetic aperture radar (InISAR) imaging provides complementary information to monostatic inverse synthetic aperture radar (ISAR) imaging. This paper proposes a new InISAR imaging system for space targets based on wideband direct sampling using two antennas. The system is easy to realize in engineering since the motion trajectory of space targets can be known in advance, which is simpler than that of three receivers. In the preprocessing step, high speed movement compensation is carried out by designing an adaptive matched filter containing speed that is obtained from the narrow band information. Then, the coherent processing and keystone transform for ISAR imaging are adopted to reserve the phase history of each antenna. Through appropriate collocation of the system, image registration and phase unwrapping can be avoided. Considering the situation not to be satisfied, the influence of baseline variance is analyzed and compensation method is adopted. The corresponding size can be achieved by interferometric processing of the two complex ISAR images. Experimental results prove the validity of the analysis and the three-dimensional imaging algorithm. Downloaded From: http://remotesensing.spiedigitallibrary.org/ on 05/19/2015 Terms of Use: http://spiedl.org/termsFig. 7 The distribution of dimensions in ISAR image. Tian et al.: Interferometric inverse synthetic aperture radar imaging for space targets.

Inverse Synthetic Aperture Radar Imaging of Targets with Complex Motion based on Optimized Non-Uniform Rotation Transform

“…The echo is received through wideband direct sampling, and then, the matched filtering containing high-speed compensation [29] is adopted for pulse compression. After that, the obtained range profile is expressed as…”

Three-dimensional reconstruction for space targets with multistatic inverse synthetic aperture radar systems

“…However, such a 3D-FT based method requires a measurement of radar data in three dimensions with a dense sampling way, which increases the cost of computation and storage significantly. The second type of approaches is based on the interferometric ISAR (InISAR) [4][5][6][7], which uses the spatial information provided by multiple antennas. Such an approach has the advantage of not requiring the prior knowledge of target motions.…”

Interferometric ISAR imaging for space moving targets on a squint model using two antennas

“…In order to enhance the target recognition probability, the interferometric ISAR (InISAR) [5][6][7][8][9][10] technique is proposed to achieve the third dimension of the target. Traditional InISAR imaging systems commonly use three receiving antennas.…”