Yuehui Song, Xinying Liu, Shichun Li, Fei Gao, Yufeng Wang, Dengxin Hua. Research on Processing Algorithms for Ground-Based Mie Lidar Echo Signal Based on Compressed Sensing[J]. Acta Optica Sinica, 2025, 45(6): 0601010

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- Acta Optica Sinica
- Vol. 45, Issue 6, 0601010 (2025)

Fig. 1. Lidar echo signal of the ground-based Mie lidar

Fig. 2. Frequency characteristics of the ground-based Mie lidar echo signal

Fig. 3. Wavelet decomposition coefficient of Mie lidar echo signal. (a)(b) Low-frequency coefficients and high-frequency coefficients of the first level decomposition; (c)(d) low-frequency coefficients and high-frequency coefficients of the second level decomposition; (e)(f) low-frequency coefficients and high-frequency coefficients of the third level decomposition

Fig. 4. Reconstructed lidar signal with the threshold processed wavelet decomposition coefficient

Fig. 5. Simulation flow for reconstructing lidar echo signal based on CS

Fig. 6. Reconstructed signal and original signal in one experiment

Fig. 7. Comparison of original signal with reconstructed signals of different SNRs. (a) Original signal; (b) 35 dB; (c) 30 dB; (d) 25 dB; (e) 20 dB; (f) 15 dB; (g) 10 dB

Fig. 8. Reconstruction effect when the SNR of input signal is different. (a) SNR of input signal; (b) increment of SNR; (c) C; (d) RMSE

Fig. 9. Processing effect of OMP algorithm on Gaussian white noise. (a) Input noise; (b) noise processed by OMP algorithm

Fig. 10. Comparison of standard atmosphere model and retrieved extinction coefficient from reconstructed signal. (a) Extinction coefficient of aerosols in standard atmosphere model; (b) extinction coefficient of reconstructed echo signal inversion under 30 dB SNR conditions

Fig. 11. Errors of retrieved extinction coefficient. (a) Absolute error; (b) relative error
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Table 1. Transceiver system parameters of the Mie lidar
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Table 2. Performance of the ten reconstruction experiments
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Table 3. Reconstruction effect when SNR of input signal is different

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