Influence of sampling frequency and laser pulse width on ranging accuracy of full-waveform LiDAR

Hao Zhou; Qingzhou Mao; Qingquan Li

doi:10.3788/IRLA20210363

Journals >Infrared and Laser Engineering >Volume 51 >Issue 4 >Page 20210363 > Article

Infrared and Laser Engineering
Vol. 51, Issue 4, 20210363 (2022)

Influence of sampling frequency and laser pulse width on ranging accuracy of full-waveform LiDAR

Hao Zhou¹, Qingzhou Mao^1、*, and Qingquan Li²

Author Affiliations

¹School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China

²MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, Shenzhen University, Shenzhen 518060, China

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DOI: 10.3788/IRLA20210363 Cite this Article

Hao Zhou, Qingzhou Mao, Qingquan Li. Influence of sampling frequency and laser pulse width on ranging accuracy of full-waveform LiDAR[J]. Infrared and Laser Engineering, 2022, 51(4): 20210363 Copy Citation Text

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Fig. 1. Reference light with different pulse widths

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Fig. 2. Comparison of ranging accuracy of 5 GHz sampling data

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Fig. 3. Comparison of ranging accuracy under different sampling frequencies

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Optical pulse width/ns	Amplitude of reference light/mV	Pulse width of reference light/ns	FWHM of reference light/ns	Amplitude of the echo/mV	Pulse width of echo/ns	FWHM of echo/ns
1	61.15	3.71	1.82	157.38	3.04	1.42
2	125.78	4.38	2.06	170.69	3.81	1.81
3	163.99	5.12	2.42	177.85	4.6	2.29
4	175.87	6.04	2.92	179.72	5.49	2.84
5	175.61	7.19	3.57	174.54	6.47	3.48
6	175.99	8.28	4.31	177.15	7.5	4.18
7	175.96	9.13	4.96	177.57	8.4	4.83
8	175.94	10.31	5.82	175.02	9.63	5.70
9	176.15	10.92	6.26	176.06	10.25	6.14
10	177.10	12.05	7.03	175.14	11.35	6.89

Table 1. Data average parameters under 5 GHz sampling frequency

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Equivalent sampling frequency after interpolation/GHz	Ranging accuracy of original 5 GHz data/mm	Ranging accuracy of original 2.5 GHz data/mm	Ranging accuracy of original 1.25 GHz data/mm
1.25	Null	Null	2.33
2.50	Null	1.30	1.19
5.00	0.76	0.89	0.98
10.00	0.72	0.83	0.91
20.00	0.70	0.77	0.89
40.00	0.69	0.76	0.87
80.00	0.69	0.76	0.87

Table 2. Ranging accuracy of different interpolation ratios

Hao Zhou, Qingzhou Mao, Qingquan Li. Influence of sampling frequency and laser pulse width on ranging accuracy of full-waveform LiDAR[J]. Infrared and Laser Engineering, 2022, 51(4): 20210363

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