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Open AccessArticle

Influence of Waveform Characteristics on LiDAR Ranging Accuracy and Precision

by Xiaolu Li 1,2, Bingwei Yang 1, Xinhao Xie 1, Duan Li 1 and Lijun Xu 1,2,*
School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China
Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beijing 100191, China
Author to whom correspondence should be addressed.
Sensors 2018, 18(4), 1156;
Received: 5 March 2018 / Revised: 1 April 2018 / Accepted: 4 April 2018 / Published: 10 April 2018
(This article belongs to the Section Remote Sensors, Control, and Telemetry)
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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MDPI and ACS Style

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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