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Proceedings Paper

Research on inverse synthetic aperture ladar
Author(s): Xiaoyan Zhao; Xiaodong Zeng; Changqing Cao; Zhejun Feng; Chao Fu
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Paper Abstract

Heterodyne detection based on the inverse synthetic aperture ladar (ISAL) can obtain useful information such as phase and amplitude and frequency of the moving target. Through analysis of these information, we can conclude the exact appearance, orientation and other characteristic about the target. However, the heterodyne detection is usually difficult to accomplish. The difficulties lie in two main aspects: the first one is that the wavefront of returned signal wave and local-oscillator wave are misaligned. The second one is that the random phase delay of the returned wave. In this paper, we analyze systematically the principle and effect of heterodyne detection such as separation angle and spot size. Then a useful conclusion is presented to state the exist problem about match between signal wave and local-oscillator field.

Paper Details

Date Published: 27 August 2009
PDF: 8 pages
Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73821J (27 August 2009); doi: 10.1117/12.836538
Show Author Affiliations
Xiaoyan Zhao, Xidian Univ. (China)
Xiaodong Zeng, Xidian Univ. (China)
Changqing Cao, Xidian Univ. (China)
Zhejun Feng, Xidian Univ. (China)
Chao Fu, Xidian Univ. (China)


Published in SPIE Proceedings Vol. 7382:
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Farzin Amzajerdian; Chun-qing Gao; Tian-yu Xie, Editor(s)

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