Target velocity acquisition from signals received by Fourier telescopy

Li Yang; Xiang Libin; Zhang Wenxi

doi:10.3788/HPLPB20132509.2193

Volume 25 Issue 09

Jul. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(09): 2193-2197

Chen Guangyu, Zhang Xiaomin, Zheng Wanguo, et al. Evaluation methods and models of mission availability for ICF laser facilities[J]. High Power Laser and Particle Beams, 2012, 24: 2103-2108. doi: 10.3788/HPLPB20122409.2103

Citation:

Li Yang, Xiang Libin, Zhang Wenxi. Target velocity acquisition from signals received by Fourier telescopy[J]. High Power Laser and Particle Beams, 2013, 25: 2193-2197. doi: 10.3788/HPLPB20132509.2193

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Target velocity acquisition from signals received by Fourier telescopy

doi: 10.3788/HPLPB20132509.2193

Li Yang^{1,2
,
,},
Xiang Libin³,
Zhang Wenxi^2,3

1.
Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100049,China;
3.
Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094,China

Received Date: 2013-01-04
Rev Recd Date: 2013-04-26
Publish Date: 2013-07-17

Abstract

Abstract

The signals received by Fourier telescopy are analyzed and demonstrated to contain not only image information but also two-dimensional velocity information of the measured target. The velocities on each component can be calculated by the periodic signal frequencies that can be extracted from received signals. Then the two-dimension velocity is composited. The frequency of the signal is extracted by fast Fourier transform analysis for coarse frequency estimate, and by ratio frequency correction algorithms using Hanning window for precise frequency correction. Simulation is made to measure the flight velocity of the missile by Fourier telescopy. The result shows that the target velocity acquired by this method has almost no error without noise, while it has relatively high precision with noise when SNR is higher than 5 dB. The velocity acquisition method from receiving signal of Fourier telescopy is demonstrated to have high precision, a good anti-noise property and to be theoretically feasible.
- Fourier telescopy,
- velocity measurement,
- spectrum correction

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