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Proceedings Paper

Applications of digital IF receivers and under-sampling technique in ladar
Author(s): Zhi-yuan Song; Shao-lan Zhu; Li-jun Dong; Li Feng; Hao-dong He
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Paper Abstract

The traditional technique of phase laser range finder is mixing high frequency signals with analog circuits and filtering them to obtain the useful signal with low frequency. But the analog mixing circuits are susceptible to interference and will bring amplitude attenuation, phase jitter and offset and this way has difficulties in achieving high precision ranging and fast speed ranging at the same time. The method of this paper is based on under-sampling technique with digital synchronous detection and referring to Digital down converter technique of digital IF receiver in radar system. This method not only reduces the complexity of data processing, improves the speed and accuracy of phase detection at the same time, but also reduces requirements for ADC devices and DSP chips in the ladar system by a lower sampling rate. At the same time, the structure of electronic system is global simplified compared with traditional analog ladar system and the anti-jamming is greatly enhanced. So this method has important research value.

Paper Details

Date Published: 23 August 2011
PDF: 9 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 819249 (23 August 2011); doi: 10.1117/12.901928
Show Author Affiliations
Zhi-yuan Song, Xi'an Institute of Optics and Precision Mechanics (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Shao-lan Zhu, Xi'an Institute of Optics and Precision Mechanics (China)
Li-jun Dong, Xi'an Institute of Optics and Precision Mechanics (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Li Feng, Xi'an Institute of Optics and Precision Mechanics (China)
Hao-dong He, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging
Farzin Amzajerdian; Weibiao Chen; Chunqing Gao; Tianyu Xie, Editor(s)

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