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Sensors 2018, 18(4), 1156; doi:10.3390/s18041156

Influence of Waveform Characteristics on LiDAR Ranging Accuracy and Precision

1
School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China
2
Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Received: 5 March 2018 / Revised: 1 April 2018 / Accepted: 4 April 2018 / Published: 10 April 2018
(This article belongs to the Section Remote Sensors)
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Abstract

Time of flight (TOF) based light detection and ranging (LiDAR) is a technology for calculating distance between start/stop signals of time of flight. In lab-built LiDAR, two ranging systems for measuring flying time between start/stop signals include time-to-digital converter (TDC) that counts time between trigger signals and analog-to-digital converter (ADC) that processes the sampled start/stop pulses waveform for time estimation. We study the influence of waveform characteristics on range accuracy and precision of two kinds of ranging system. Comparing waveform based ranging (WR) with analog discrete return system based ranging (AR), a peak detection method (WR-PK) shows the best ranging performance because of less execution time, high ranging accuracy, and stable precision. Based on a novel statistic mathematical method maximal information coefficient (MIC), WR-PK precision has a high linear relationship with the received pulse width standard deviation. Thus keeping the received pulse width of measuring a constant distance as stable as possible can improve ranging precision. View Full-Text
Keywords: LiDAR ranging; accuracy; precision; waveform characteristic LiDAR ranging; accuracy; precision; waveform characteristic
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, X.; Yang, B.; Xie, X.; Li, D.; Xu, L. Influence of Waveform Characteristics on LiDAR Ranging Accuracy and Precision. Sensors 2018, 18, 1156.

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