Performance Analysis on ISAR Imaging of Space Targets

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Abstract

Usually, in traditional Inverse Synthetic Aperture Radar (ISAR) systems design and mode selection for space satellite targets, coherent integration gain in azimuth direction hardly can be analyzed, which depends on target's motion. In this study, we combine the target orbit parameters to determine its motion relative to radar and deduce coherent integration equation in ISAR imaging to realize the selection of imaging intervals based on coherent integration, which can ensure the resolution in azimuth direction. Meanwhile, we analyze the influence of target orbit altitude to echo power and imaging Signal-to-Noise Ratio (SNR) that provides a new indicator for space observation ISAR systems design. The result of simulation experiment illustrates that with target orbit altitude increasing, coherent integration gain in azimuth direction of large-angular observation offsets the decreasing of imaging SNR in a degree, which provides a brand-new perspective for space observation ISAR systems and signal processing design.

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	Articles by authors
	Zhou Yejian
	Zhang Lei
	Wang Hongxian
	Xing Mengdao

Key words： Space observation Inverse Synthetic Aperture Radar (ISAR) imaging Radar operating distance Coherent integration gain

Received: 2016-12-01;

Fund:

The National Natural Science Foundation of China (61301280, 61301293)

Corresponding Authors: 10.12000/JR16136
E-mail: leizhang@xidian.edu.cn

Cite this article:

Zhou Yejian,Zhang Lei,Wang Hongxian et al. Performance Analysis on ISAR Imaging of Space Targets[J]. JOURNAL OF RADARS, 2017, 6(1): 17-24.

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