Modified Imaging Algorithm for Inverse Synthetic Aperture LiDAR Based on Optical Imaging Model

Chen Xu; Anpeng Song; Kai Jin; Kai Wei

doi:10.3788/LOP221548

Laser & Optoelectronics Progress, Volume. 60, Issue 12, 1228001(2023)

Modified Imaging Algorithm for Inverse Synthetic Aperture LiDAR Based on Optical Imaging Model

Chen Xu^1,2,3, Anpeng Song^1,2,3, Kai Jin^1,2、*, and Kai Wei^1,2

Author Affiliations

¹Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, Sichuan, China

²Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, Sichuan, China

³University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(9)

Fig. 1. Schematic of ISAL principle

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Fig. 2. Flowchart of MMBIR algorithm

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Fig. 3. Calculation efficiency of MMBIR algorithm

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Fig. 4. Test pattern used for simulation

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Fig. 5. Simulation comparison results of RDA and MMBIR algorithm under different CNRs. (a) 5 dB; (b) 0 dB; (c) -5 dB

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Fig. 6. Comparison of outdoor data imaging results. (a) Target photos; (b) images recovered by RDA; (c) images recovered by MMBIR

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Table 1. Simulation parameters

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Table 1. Simulation parameters

Parameter	Value
Wavelength /nm	1550
Target size /cm	20×20
Rotate speed /（mrad·s^-1）	25
Signal bandwidth /GHz	150
Pulse repetition frequency /kHz	10
Sampling rate /MHz	2
Imaging size /（pixel×pixel）	200×200
Synthetic aperture time /ms	20
Range resolution /mm	1
Azimuth resolution /mm	1

Table 2. Parameters of outdoor experiment

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Table 2. Parameters of outdoor experiment

Parameter	Value
Wavelength /nm	1550
Rotate speed /（mrad·s^-1）	17.45
Signal bandwidth /GHz	4
Pulse repetition frequency /kHz	50
Sampling rate /MHz	250
Imaging size /（pixel×pixel）	40×64
Synthetic aperture time /ms	1.28
Imaging distances /km	7
Laser power /W	2

Table 3. ENL of outdoor experiment
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Table 3. ENL of outdoor experiment
Target RDA MMBIR
“V” pattern 0.56 5.81
“I” pattern 1.76 11.27

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Chen Xu, Anpeng Song, Kai Jin, Kai Wei. Modified Imaging Algorithm for Inverse Synthetic Aperture LiDAR Based on Optical Imaging Model[J]. Laser & Optoelectronics Progress, 2023, 60(12): 1228001

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