16 August 2011 Research on range-Doppler homodyne detection system
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Proceedings Volume 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications; 819618 (2011); doi: 10.1117/12.900565
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China
Abstract
At present, according to various optical and signal processing methods, there are mainly three detection modes in laser radar system: direct detection, heterodyne detection and homodyne detection. A homodyne laser radar system made up of a narrow line-width laser, an amplitude modulator and balanced detector is introduced here. Both transmitted and local oscillator (LO) signals are amplitude modulated by the same chirp signal, and the de-chirping process is completed in the optical domain. When we do signal processing on range and Doppler frequency, we use chirp-z method besides normal Fourier Transform. In this way, we get the experiment data more accurately. The experiment data indicates that the range and velocity precision reaches cm and mm/s dimension which are basically conforming to the theoretical precision.
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Xiao Yu, Guang-lie Hong, Yuan Ling, Rong Shu, "Research on range-Doppler homodyne detection system", Proc. SPIE 8196, International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, 819618 (16 August 2011); doi: 10.1117/12.900565; https://doi.org/10.1117/12.900565
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KEYWORDS
Homodyne detection

LIDAR

Doppler effect

Laser systems engineering

Signal processing

Fourier transforms

Signal detection

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